The median of the number of students, and the interpretation is C. The median is 58, and it represents the typical number of students who checked books out.
How to find the median ?The first thing to do when finding the median, is to order the number of students in order from smallest to largest :
31, 40, 48, 52, 53, 63, 70, 75, 75, 82
As there are 10 numbers on the list, the median would be the average of the 5th and 6th numbers :
= ( 53 + 63 ) / 2
= 116 / 2
= 58
This measures shows the number of students that typically check out books.
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find the probability that someone who tests negative for opium use does not use opium. (enter the value of the probability in decimal format and round the final answer to three decimal places.)
To find the probability that someone who tests negative for opium use does not use opium, we need to use Bayes' theorem.
Let's assume that the prevalence of opium use in the population is 5%. This means that out of 100 people, 5 people use opium.
Now, let's say that the test for opium use has a sensitivity of 95% and a specificity of 98%. This means that out of 100 people who use opium, 95 will test positive, and out of 100 people who do not use opium, 98 will test negative.
Using Bayes' theorem, we can calculate the probability that someone who tests negative for opium use does not use opium as follows:
P(Not using opium | Negative test) = P(Negative test | Not using opium) * P(Not using opium) / P(Negative test)
P(Negative test | Not using opium) = 0.98 (specificity)
P(Not using opium) = 0.95 (complement of the prevalence)
P(Negative test) = P(Negative test | Not using opium) * P(Not using opium) + P(Negative test | Using opium) * P(Using opium)
P(Negative test | Using opium) = 1 - 0.95 = 0.05 (false negative rate)
P(Using opium) = 0.05 (prevalence)
P(Negative test) = 0.98 * 0.95 + 0.05 * 0.05 = 0.0935
P(Not using opium | Negative test) = 0.98 * 0.95 / 0.0935 ≈ 0.994
Therefore, the probability that someone who tests negative for opium use does not use opium is approximately 0.994, or 0.994 in decimal format rounded to three decimal places.
In this case, we want to find the probability of not using opium, given that someone tests negative.
Let's define the events as follows:
- A: Person does not use opium
- B: Person tests negative for opium
We want to find P(A|B), which is the probability of event A occurring given that event B has occurred. Using the conditional probability formula:
P(A|B) = P(A ∩ B) / P(B)
Unfortunately, without specific data on the probabilities of A, B, and A ∩ B (not using opium and testing negative), we cannot provide a numeric answer. However, if you have this information, you can simply plug the values into the formula and divide P(A ∩ B) by P(B) to obtain the probability in decimal format. Finally, round the result to three decimal places.
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Where in the hierarchy does should “Circles” go?
Answer:
Answer with explanation:
→ A circle is a plane figure. It does not have straight sides,so it is not a polygon.
We can say that Circle is a Simple Closed Figure.
In other way, a Circle is a locus of all the points Such that Distance from a fixed point ,called Center is Same.And When you join all these points ,which is infinite in number you , will get a 2 -D Shape called Circle.
In real life, Bangle, Rotation of 3-4 Blade Ceiling Fan forms a Circular Shape.
→→Circle= Simple Closed Figure.
Step-by-step explanation:
Suppose Andrew earns $45,000 EC per month. The average salary for everyone in Andrew's company is $41, 000 EC per month with a standard deviation of $7,000 EC. Suppose David earns $38, 000 EC in his company, for which the average salary is $35,000 EC with a standard deviation of $1,700 EC. Suppose the monthly salary in Andrew's and David's company follows a normal distribution, explain who is doing better in comparison to their coworkers and why?
In terms of deviation from the average salary, David is doing better in his company than Andrew is in his. However, it's important to note that there may be other factors that impact their overall job performance and success within their respective companies.
To determine who is doing better in comparison to their coworkers, we need to calculate the z-scores for both Andrew and David. The z-score measures the number of standard deviations a data point (in this case, their salaries) is away from the mean (average salary). The formula for the z-score is:
z = (X - μ) / σ
where X is the individual's salary, μ is the average salary, and σ is the standard deviation.
For Andrew:
X = $45,000 EC
μ = $41,000 EC
σ = $7,000 EC
z = ($45,000 - $41,000) / $7,000
z = $4,000 / $7,000
z = 0.5714
For David:
X = $38,000 EC
μ = $35,000 EC
σ = $1,700 EC
z = ($38,000 - $35,000) / $1,700
z = $3,000 / $1,700
z = 1.7647
Comparing these deviations, we can see that David is doing better in comparison to his coworkers than Andrew is. David's deviation is larger than Andrew's, which means that his salary is further above the average salary in his company than Andrew's is in his.
A higher z-score indicates a better position compared to coworkers. In this case, David has a higher z-score (1.7647) compared to Andrew (0.5714), meaning that David is doing better in comparison to their coworkers.
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Shaquana invested $230 in an account paying an interest rate of 4 3/8% compounded continuously. Brianna invested $230 in an account paying an interest rate of 4 3/4% compounded monthly. After 18 years, how much more money would Brianna have in her account than Shaquana, to the nearest dollar?
Answer: &1,552.50
Step-by-step explanation: Step 1: Multiply Shaquana and Briana deposits of $230 times both interest rates.
Step 2: Shaquana dollar amount adds up to $1006.25. Brianna’s dollar amount adds up to $1,092.50.
Step 3: Multiply both totals times 18yrs.
Step 4: Subtract 18,112.50 from 19,665 and you find that Brianna will have $1552.50 more than Shaquana.
Brianna would have $290 more in her account than Shaquana after 18 years.
The final amount in Shaquana's account is:
[tex]A=230e^0^.^0^4^3^7^5^\times^1^8[/tex]
[tex]A=230e^0^.^7^8^7^5[/tex]
A=230×1.082
= $249
For Brianna, we have:
P = $230
r = 4.75% / 12 = 0.0039583333
t = 18 × 12 = 216 months
So, the final amount in Brianna's account is:
A = $230×(1 + 0.0039583333)²¹⁶
A=230(1.00395)²¹⁶
A=230×2.34
A=538.2
Therefore, the difference in the final amounts is:
$538.2 - $249= $289.2
So, Brianna would have $290 more in her account than Shaquana after 18 years.
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Circle the greater fraction. Then subtract the
lesser fraction from the greater fraction.
4/5 8/9. What is it pls
Answer:
The greater fraction is 8/9. The difference is 4/45
Step-by-step explanation:
To compare we need a common denominator. That number is 45
[tex]\frac{4}{5}[/tex]·[tex]\frac{9}{9}[/tex] = [tex]\frac{36}{45}[/tex]
[tex]\frac{8}{9}[/tex]·[tex]\frac{5}{5}[/tex] = [tex]\frac{40}{45}[/tex] This has the largest value.
[tex]\frac{40}{45}[/tex] - [tex]\frac{36}{45}[/tex] = [tex]\frac{4}{45}[/tex]
Helping in the name of Jesus.
A state's license plate starts with a digit other than 0 followed by four capital letters (A through Z) followed by two digits ( through 9). (a) How many different license plates are possible? (b) How many different license plates start with a 2 and end with a 9?(c) How many different license plates have no repeated symbols (all the digits are different and all the letters are different)?
The manager of an automobile dealership is considering a new bonus plan in order to increase sales. Currently, the mean sales rate per salesperson is five automobiles per month. The correct set of hypotheses for testing the effect of the bonus plan is:________
The correct set of hypotheses for testing the effect of the bonus plan is:
To test the effect of the new bonus plan on increasing sales at the automobile dealership, the manager can use the following set of hypotheses:
Null Hypothesis: The mean sales rate per salesperson remains the same or less than five automobiles per month (H0: μ ≤ 5)
Alternative Hypothesis: The mean sales rate per salesperson increases with the implementation of the bonus plan (HA: μ > 5)
These hypotheses will help determine if the bonus plan has a significant impact on increasing sales.
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sketch the following region and write an iterated integral of a continuous function f over the region. use the order dy dx. r is the region in the first quadrant bounded by a circle of radius 5 centered at the origin.
we write the iterated integral of a continuous function f over the region using the order dy dx. Since the region is symmetric with respect to the x-axis, we can integrate over the top half of the region and then multiply by 2.
Here, "region" refers to the part of the circle of radius 5 centered at the origin that lies in the first quadrant, "integral" refers to the calculation of the area or volume under a curve or surface, and "quadrant" refers to one of the four regions obtained by dividing a plane into four equal parts by the x- and y-axes.
Step 1: Sketch the region
The region (R) is in the first quadrant, which means x ≥ 0 and y ≥ 0. The region is bounded by a circle with radius of 5 centered at the origin (0,0). This circle can be represented by the equation x^2 + y^2 = 25.
Step 2: Write the iterated integral
To find the iterated integral of a continuous function f over the region R using the order dy dx, we first need to find the bounds for y and x.
The limits of integration for y are from 0 to the y-coordinate of the top half of the circle, which is √(25-x^2). The limits of integration for x are from 0 to 5. Therefore, the iterated integral is:
∫ from 0 to 5 ∫ from 0 to √(25-x^2) f(x,y) dy dx
For y: Since R is in the first quadrant and bounded by the circle, the lower bound for y is y = 0. The upper bound for y, given x, is the equation of the circle's top half, solving for y: y = sqrt(25 - x^2).
For x: Since R is in the first quadrant, the lower bound for x is x = 0, and the upper bound is x = 5 (the radius of the circle).
Now we can write the iterated integral using these bounds:
∫(from x=0 to x=5) ∫(from y=0 to y=sqrt(25-x^2)) f(x,y) dy dx
This iterated integral represents the continuous function f over the specified region R in the first quadrant, using the order dy dx.
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problem 2. (1 point) you are hosting a party with 80 fellow students from uci (including yourself the number of students is 81). as the party organizer, you shake hands with every guest to welcome them. moreover, there are a lot handshakes among the guests as well (e.g., to say hello or introduce themselves). if you do not know the total number of handshakes, can you be certain that there are at least two guests who had the same number of handshakes?
Yes, you can be certain that there are at least two guests who had the same number of handshakes. This is due to the Pigeonhole Principle.
As the party organizer, you shake hands with all 80 guests, which means you have 80 handshakes. The guests can have a minimum of 0 handshakes (if they don't shake hands with anyone except you) and a maximum of 79 handshakes (if they shake hands with everyone except themselves). There are 80 guests (excluding yourself), so there are 80 "pigeonholes" for the number of handshakes. The range of possible handshakes among the guests is from 0 to 79, which creates 80 possible outcomes or "pigeons."
According to the Pigeonhole Principle, if there are n pigeonholes and n+1 pigeons, at least one pigeonhole must contain at least two pigeons. In this case, there are 80 pigeonholes (guests) and 80 pigeons (possible handshakes). Therefore, at least two guests must have had the same number of handshakes.
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true or false? the P(a | b) means the probability of event a given that event b has already occured
Conditional probability is calculated by multiplying the probability of the preceding event by the updated probability of the succeeding, or conditional, event.
True. The notation P(a | b) represents the conditional probability of event a given that event b has occurred. It is read as "the probability of a given b."
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The college student senate is sponsoring a spring break Caribbean cruise raffle. The proceeds are to be donated to the Samaritan Center for the Homeless. A local travel agency donated the cruise, valued at $2000. The students sold 2170 raffle tickets at $5 per ticket.
(a) Kevin bought twenty-eight tickets. What is the probability that Kevin will win the spring break cruise to the Caribbean? (Round your answer to five decimal places.)
What is the probability that Kevin will not win the cruise? (Round your answer to five decimal places.)
(b) Expected earnings can be found by multiplying the value of the cruise by the probability that Kevin will win. What are Kevin's expected earnings? (Round your answer to two decimal places.)
$
Is this more or less than the amount Kevin paid for the twenty-eight tickets?
---Select--- less more
How much did Kevin effectively contriute to the Samaritan Center for the Homeless? (Round your answer to two decimal places.)
Kevin spent $5 per for 28 tickets, so he spent $5 * 28 = $140 on tickets. Since his expected earnings ($25.81) are less than the amount he spent ($140), Kevin effectively contributed: $114.19.
(a) Kevin bought 28 tickets, and there are a total of 2170 tickets sold.
The probability that Kevin will win the cruise is:
Probability = (Number of Kevin's tickets) / (Total number of tickets)
Probability = 28 / 2170 = 0.01290323 (rounded to 5 decimal places)
The probability that Kevin will not win the cruise is:
1 - Probability of winning = 1 - 0.01290323 = 0.98709677 (rounded to 5 decimal places)
(b) Expected earnings can be found by multiplying the value of the cruise ($2000) by the probability that Kevin will win (0.01290323):
Expected earnings = $2000 * 0.01290323 = $25.81 (rounded to 2 decimal places)
Kevin spent $5 per ticket for 28 tickets, so he spent $5 * 28 = $140 on tickets. Since his expected earnings ($25.81) are less than the amount he spent ($140), Kevin effectively contributed:
$140 - $25.81 = $114.19 (rounded to 2 decimal places)
to the Samaritan Center for the Homeless.
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a factory has a machine which bends wire at a rate of 10 unit(s) of curvature per second. how long does it take to bend a straight wire into a circle of radius 6?
It would take (6π/5) seconds to bend a straight wire into a circle of radius 6 using a machine that bends wire at a rate of 10 unit(s) of curvature per second.
To calculate the time it takes to bend a straight wire into a circle of radius 6 using a machine that bends wire at a rate of 10 unit(s) of curvature per second, we need to find the length of the wire and then divide it by the rate of curvature.
The circumference of a circle with a radius of 6 is 2πr = 2π(6) = 12π. Therefore, the length of the wire that needs to be bent is 2πr = 12π.
Now we can calculate the time it takes to bend the wire by dividing the length by the rate of curvature:
Time = length of wire / rate of curvature = (12π units) / (10 units/second)
Simplifying, we get:
Time = (6π/5) seconds
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The odometer shows
that Darlene rode her bike 8 2/5 miles in 3/4 of an hour. What was her average speed ?
Answer: Average speed is given by the formula:
speed = distance ÷ time
Given that Darlene rode her bike 8 2/5 miles in 3/4 of an hour. We need to convert the mixed number 8 2/5 to an improper fraction.
8 2/5 = (8 x 5 + 2) / 5 = 42/5
So, Darlene rode her bike a distance of 42/5 miles in a time of 3/4 hours.
Substitute speed = distance ÷ time
speed = (42/5) ÷ (3/4)
To divide by a fraction, we invert and multiply:
speed = (42/5) x (4/3)
speed = 56/5
So, Darlene's average speed was 56/5 miles per hour (mph).
To simplify this fraction, we can divide both the numerator and denominator by 1:
speed = 11/1
The radius of a sphere with volume 288 pi cm^3
The radius of a sphere with volume 288π cm³ is equal to 6 centimeter.
How to calculate the volume of a sphere?In Mathematics and Geometry, the volume of a sphere can be calculated by using the following mathematical equation (formula):
Volume of a sphere = 4/3 × πr³
Where:
r represents the radius.
By substituting the given parameters into the formula for the volume of a sphere, we have the following;
288π = 4/3 × π × r³
r³ = 864/4
Radius, r = ∛216
Radius, r = 6 centimeter.
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Sheena is stocking a shalf with bags of flour that weigh 5 1 /4
5 4/ 1 pounds each. If Sheena stocks the shelf with 13 bags of flour, find the combined weight of the 13 bags.
Answer:
68 1/4 lbs
Step-by-step explanation:
its just the answer
Find the tangent of X.
1) 8+9x(x+4)=(3x-2)(3x+2).
2)2x(2x-2)-17=(5+2x)(2x-5).
3)(2x+1)(4x2-2x+1)=4x(2x2-5)
Using mathematical operators, the value of x in the equations are -1/3, (2.39 or 0.71) and no solution respectively.
What is the value of x ?To determine the value of x in the equations, we need to use mathematical functions or operators;
1. 8 + 9x(x + 4) = (3x - 2)(3x + 2)
Open the brackets
8 + 9x² + 36x = 9x² + 6x - 6x - 4
Collect like terms
8 + 9x² + 36x - 9x² + 4 = 0
8 + 4 + 36x = 0
12 + 36x = 0
36x = -12
x = -12/36
x = -1/3
2. 2x(2x - 2) - 17 = (5x + 2x)(2x - 5)
Open the brackets;
4x² - 4x - 17 = 10x² - 25x + 4x² - 10x
collect like terms
14x² - 35x - 4x² - 4x + 17 = 0
10x² - 31x + 17 = 0
solving the quadratic equation;
x = 2.39 or x = 0.71
3. (2x + 1)(4x² - 2x + 1) = 4x(2x² - 5)
Open brackets;
8x³ - 4x² + 2x + 4x² - 2x + 1 = 8x³ - 20x
collect like terms
8x³ + 1 - 8x³ + 20 = 0
21 = 0
The equation has no solution
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3 Are the expressions a +8 - 4 3 3 First combine the like terms in 4 4 a +8 4 1 a - 2 and (a 2 and (a + 12) equivalent? Show why or why not. 4 a-2= 1 ·a+8=a- 2. 4 a + ? K 7 4 1 8 5 2 9 6 $
The expression 3 / 4 a + 8 - 1 / 4 a - 2 is equivalent to 1 / 2(a + 12)..
'
How to find equivalent expression?Two expressions are said to be equivalent if they have the same value irrespective of the value of the variable(s) in them.
The equivalent expression can be found by simplifying the expression as follows:
Therefore,
3 / 4 a + 8 - 1 / 4 a - 2
collect like terms
3 / 4 a - 1 / 4 a + 8 - 2
3a - 1a / 4 + 6
2a/ 4 + 6
1 / 2 a + 6
Therefore, the second expression is 1 / 2(a + 12).
Let's open the brackets
1 / 2(a + 12) = 1 / 2a + 6
Therefore, the expression are equivalent.
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How do you solve a positive number over a variable (or vice versa) both raised to a negative power? Ex: (x/2) to the -3rd?
By solving a positive number over a variable (or vice versa) both raised to a negative power ,The simplified expression is [tex]\frac{8}{x^{3} }[/tex].
To solve an expression with a positive number over a variable, both raised to a negative power, you should follow these steps:
1. Identify the base and exponent: In your example, the base is (x/2) and the exponent is -3.
2. Apply the negative exponent rule: When an expression with a negative exponent is raised to a power, you can rewrite it with a positive exponent by taking the reciprocal of the base.
The negative exponent rule states that [tex]a^{-n}[/tex] = 1/([tex]a^{n}[/tex]), where 'a' is the base and 'n' is the exponent.
3. In your example, apply the negative exponent rule to [tex](x/2)^{-3}[/tex] This becomes 1/([tex](x/2)^{-3}[/tex]).
4. Simplify the expression: Raise the base (x/2) to the power of 3. Remember that when you raise a fraction to an exponent, you should raise both the numerator and denominator to that exponent. So, [tex](x/2)^{-3}[/tex] = ([tex]X^{3}[/tex])/([tex]2^{3}[/tex]) =[tex]\frac{x^{3}}{8 }[/tex]
5. Substitute the simplified expression back into the original equation: 1/(([tex](x/2)^{3}[/tex]) = 1/([tex]\frac{x^{3}}{8 }[/tex]).
6. To further simplify, remember that dividing by a fraction is equivalent to multiplying by its reciprocal. So, 1/([tex]\frac{x^{3}}{8 }[/tex]) = 1 * ([tex]\frac{8}{x^{3} }[/tex]) = [tex]\frac{8}{x^{3} }[/tex].
The simplified expression is [tex]\frac{8}{x^{3} }[/tex]. This is how you solve an expression with a positive number over a variable, both raised to a negative power.
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The measures of the angles of a triangle are shown in the figure below. Solve for x.
45°
(6x+19)⁰
26°
First grade level equation 5x+2x=-8-6
Answer:
x = -2
Step-by-step explanation:
5x + 2x = -8 - 6
7x = -14
x = -2
Moving at a speed of v km/hr, a steamboat travels 200 km from point A to point B in t hours. Write the formula that describes t as a function of v
The relation for t as a function of v is:
t = 200km/v
How to describe t as a function of v?Here we need to remember the relation:
distance = speed*time.
Here we know that the quantities are:
speed = v
time = t
distance = 200km
Then we can write:
200km = v*t
Now we can isolate the variable t, so we have t as a function of v:
t = 200km/v
That is what we wanted.
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Triangle ABC is graphed.
Find point D that partitions AB in a 1:2 ratio (__,__)
Find point E that partitions AC in a 1:2 ratio (__,__)
The required points D and E of the partitions AB and AC are (4, 3) and (8/3, 5) respectively.
The section formula is a formula used in geometry to find the coordinates of a point that lies on a line segment between two given points.
The coordinates of point P can be found using the section formula:
x = (nx₂ + mx₁)/(m+n)
y = (ny₂+ my₁)/(m+n)
Here, x and y are the coordinates of the point P, and m+n is the total length of the line segment between (x₁, y₁) and (x₂, y₂). The ratio of the lengths of the two parts is given by m:n.
Substitute the value of coordinates of endpoints of AB for D,
D = (x, y) = ((10×1 + 1×2)/3, (3×1+2×3)/3)
D = (4, 3)
Similarly,
E = (8/3, 5)
Thus, the required point D and E of the partitions AB and AC are (4, 3) and (8/3, 5) respectively.
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A company has 3 employees, and each employee earns $15.50 an hour. The employees worked for 8 hours at regular pay and then for 2 hours at a higher overtime rate. The overtime rate is an extra $7.00 per hour. How much in total did the company pay the employees?
Answer:
Each employee worked for 8 regular hours and 2 overtime hours, so each employee worked for a total of 10 hours. The regular pay rate is $15.50 per hour, so each employee earned 8 hours x $15.50 = $124 for regular pay. For overtime pay, each employee worked for 2 hours x ($15.50 + $7.00) = $44 in total.
Step-by-step explanation:
Therefore, each employee earned a total of $124 + $44 = $168.
Since there are 3 employees, the total amount that the company paid the employees is $168 x 3 = $504.
Therefore, the company paid a total of $504 to its employees.
Answer:
$507
Step-by-step explanation:
The total rate for overtime work is $7.00 + $15.50 = $22.50
1 employee worked:
8 hours at $15.50 per hour
2 hours at $22.50 per hour
total for 1 employee:
8 × $15.50 + 2 × $22.50 = $124 + $45 = $169
total for 3 employees:
3 × $169 = $507
An oatmeal bar in the shape of a rectangular prism has a base area of 4 square inches and a height of 4 inch.
What is the volume of the oatmeal bar?
OA. 9 3/4 cubic inches
OB. 9 3/16 cubic inches
OC. 6 12/16 cubic inches
OD. 6 15/16 cubic inches
The oatmeal bar has a volume of 16 cubic inches.
What is the volume of the oatmeal bar?A rectangular prism is simply a three-dimensional solid shape which has six faces that are rectangles.
The volume of a rectangular prism is expressed as;
V = w × h × l
V = base area × height
Where w is the width, h is height and l is length
To find the volume of the rectangular prism oatmeal bar, we need to multiply the base area by the height.
So, the volume of the oatmeal bar can be calculated as:
Volume = Base Area × Height
Volume = 4 in² × 4 in
Volume = 16 in³
Therefore, the volume of 16 cubic inches.
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7. = 2250(1-0.9)
A. growth or decay
y=10.(1+0.04)
A.growth or decay
The functions categorized as decay or growth are
y = 2250(1-0.9)^x -- decayy = 10.(1+0.04)^x -- growthCategorizing the functions as decay or growthFrom the question, we have the following parameters that can be used in our computation:
y = 2250(1-0.9)^x
y=10.(1+0.04)^x
An exponential function is represented as
y = ab^x
If b > 0, then it is a growth function
Otherwise, it a decay function
using the above as a guide, we have the following:
y = 2250(1-0.9)^x -- decay
y=10.(1+0.04)^x -- growth
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pls help 100 point i dont have much time
Answer:
Step-by-step explanation:
If each side of a small cube is 1/3 cm, then one side of a big cube is 2/3.
Area of cube: x^3
2/3 * 2/3 * 2/3 = 8/27
The answer is A. Please make me brainliest!
suppose manufacturers change the size of compact disks so that they are made of the same material and have the same thickness as a current disk but have one third of the diameter. part a by what factor will the moment of inertia change? by what factor will the moment of inertia change? 13 19 127 181
Manufacturers change the size of compact disks so that they are made of the same material and have the same thickness as a current disk but have one third of the diameter, the moment of inertia will change by a factor of 1/9 or approximately 0.111.
The moment of inertia of a disk is proportional to the square of its radius (I = (1/2)mr^2). If the diameter of the new compact disk is one-third of the diameter of the current disk, then its radius will be one-sixth of the radius of the current disk (r_new = r_current/3). Therefore, the moment of inertia of the new compact disk will decrease by a factor of (1/6)^2 = 1/36, or 19.
Given that the new compact disk has one-third of the diameter of the current disk, the moment of inertia (I) will change as a function of the radius (r) squared. Since the diameter is halved, the radius is also one-third, and the moment of inertia is given by the formula I = k * r^2, where k is a constant.
When we reduce the radius to one-third (r/3), the new moment of inertia (I') can be calculated as:
I' = k * (r/3)^2
I' = k * (r^2/9)
To find the factor by which the moment of inertia has changed, we need to divide the new moment of inertia (I') by the original moment of inertia (I):
Factor = I'/I = (k * r^2/9) / (k * r^2) = 1/9
So, the moment of inertia will change by a factor of 1/9 or approximately 0.111.
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as a teacher assistant you are calculating student greades. one student had the following test scores 85,93.91,81, what is the student's average score?
Answer: 87.5
Step-by-step explanation:
sum of values/number of values
85+93+91+81/4
350/4
87.5
Based on the results of this hypothesis test, would you expect a confidence interval for the average difference between the reading and writing scores to include 0? Explain your reasoning. a. yes, because there is almost a 0% chance that average reading and writing scores are the same b. no, because most people will not earn an average score of 0 on either exam c. yes, because the evidence was not strong enough to suggest that average reading and writing scores differ d. no, because we rejected the idea that average reading and writing scores are equal
The correct answer is c. Yes, because the evidence was not strong enough to suggest that average reading and writing scores differ.
In hypothesis testing, we use a significance level to determine whether to reject or fail to reject the null hypothesis. If the p-value is less than the significance level, we reject the null hypothesis and conclude that there is evidence to support the alternative hypothesis. If the p-value is greater than the significance level, we fail to reject the null hypothesis and conclude that there is not enough evidence to support the alternative hypothesis.
Based on the results of the hypothesis test, if we failed to reject the null hypothesis (which is the case in this question), then we cannot conclude that the average reading and writing scores differ. Therefore, it is reasonable to expect a confidence interval for the average difference between the reading and writing scores to include 0. A confidence interval is a range of values that is likely to contain the true population parameter with a certain degree of confidence. Since we cannot conclude that the average scores differ, it is possible that the true population parameter is 0, and thus 0 could be included in the confidence interval.
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