Answer:
48 = 1/2 * b * (b - 4)
b
Step-by-step explanation:
According to the problem, the height of the triangle is 4m less than the base. We can express this mathematically as:
height = b - 4
The area of a triangle is given by the formula:
area = 1/2 * base * height
Substituting the given values, we get:
48 = 1/2 * b * (b - 4)
Simplifying the equation:
96 = b^2 - 4b
Rearranging and setting the equation equal to zero:
b^2 - 4b - 96 = 0
We can solve for b using the quadratic formula:
b = (-(-4) ± sqrt((-4)^2 - 4(1)(-96))) / (2(1))
b = (4 ± sqrt(16 + 384)) / 2
b = (4 ± 20) / 2
We take the positive root since the base of a triangle cannot be negative:
b = (4 + 20) / 2
b = 12
Therefore, the length of the base is 12 meters.
but in the question above is b
HEEEELP 6.005 = ____ %
Answer:
600.5%
Step-by-step explanation:
6.005 × 100 is 600.5%
"per cent" means per hundred, so TIMES by 100 to change a number to a percent. DIVIDE by 100 to change a percent to a decimal number.
Some people memorize this as move the decimal two places to the right (decimal to percent) or left (percent to decimal)
Look at the data in the table below. Which measurement has four significant
figures?
Time (s)
1
2
3
4 01
4
5
A. 0.275
B. 320,050
OC. 11,890
D. 10.4 x 105
Velocity (m/s)
0.275
750
10.4 × 10³
11,890
320,050
The measurement which has four significant figures is option C. 11,890.
Significant figures of a given number are the numbers or digits which are significant and it conveys the accurate meaning of the digit.
Given is a table which shows the velocity of a certain object in different times.
There are certain rules for calculating the significant figures.
Zeroes at the end and the beginning are not significant.
Significant figures in 0.275 = 3
Significant figures in 750 = 2
Significant figures in 320050 = 5
Significant figures in 11,890 = 4
Significant figures in 10.4 × 10⁵ = 3
Thus the measurement 11,890 has 4 significant figures.
Hence the correct option is C.
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3 8th grade math questions for 10 points hurryyyy
Answer:
Down there
Step-by-step explanation:
1. 4189 cm cubed
2. Cost of one-time fee for a camping permit
3. A translation 11 units to the left and a reflect across the 'x'-axis
convert 11pi/12 radians to degrees.
Answer:
To convert radians to degrees, we use the conversion factor which is:
1 radian = 180/π degrees
To convert 11π/12 radians to degrees, we can multiply by the conversion factor:
11π/12 radians × 180/π degrees/radian = 990/π degrees
This is the exact value in degrees. If we want a decimal approximation, we can use a calculator to evaluate:
990/π degrees ≈ 315.944 degrees
Therefore, 11π/12 radians is approximately equal to 315.944 degrees.
A rectangular prism measures 8 inches in width, 12 inches in length, and 4 inches in height. What is the surface area of the prism? Enter your answer in the box
The surface area of prism would be, 352 square inches
We know that;
Surface are of rectangular prism = 2(lb + bh + lh)
Where, l - Length of prism
b - width of prism
h - Height of prism
Here, It is given that, a rectangular prism measures 8 inches in width, 12 inches in length, and 4 inches in height.
To find the surface area of prism
l = 12 inches
b = 8 inches
h = 4 inches
Hence, We get;
surface area = 2(lb + bh + lh)
= 2(12 x 8 + 8 x 4 +12 x 4)
= 2(96 + 32 + 48)
= 352 square inches.
Therefore, the surface area of prism = 352 square inches
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Xx
A 12-foot ladder is leaning on a tree. The bottom of the ladder on the ground at a distance of 7 feet from the
base of the tree. The base of the tree and the ground form a right angle as shown.
[not drawn to scale]
What is the distance, in feet, between the ground and the top of the ladder?
Round your answer to the nearest tenth.
Answer:
if you're rough ding to the nearest tenth, in that case the answer is 9.3 ft
The profit that a company makes selling an item (in thousands of dollars) depends on the price of the item (in dollars). If p is the price of the item, then f(p) = −2p² + 24p – 54, then what are the prices that give a profit of zero dol
lars?
The solution is, the profit is 18.
If the profit of a company made by the company is in the form a quadratic expressions but in the different forms as given in the question.
a). The prices that give a profit of zero dollars.
Expression that is most useful,
Factored form: -2(p - 3)(p - 9) = 0
p = 3, 9
b). The profit when the price is zero .
Standard form:
Profit = -2p² + 24p - 54 = 0
-p² + 12p - 27 = 0
-p² + 3p + 9p - 27 = 0
-p(p - 3) + 9(p -3) = 0
(-p + 9)(p - 3) = 0
p = 3, 9
c). The price that gives the maximum profit.
Vertex form: -2(p - 6)² + 18
Vertex of the given expression → (6, 18)
Maximum profit will be at p = 6.
Therefore, profit = -2(6 - 6)² + 18 = 18
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complete question:
The profit that a company makes selling an item (in thousands of dollars) depends on the price of the item (in dollars). If p is the price of the item, then three equivalent forms for the profit are
Standard form: - 2 p^2 + 24p - 54
Factored form: -2(p - 3)(y-9)
Vertex form: -2(p-6)^2 + 18.
Which form is most useful for finding a. The prices that give a profit of zero dollars?
b. The profit when the price is zero?
c. The price that gives the maximum profit?
given the line of best fit if for a set of data points with the equation y=5x - 2.5, what is the residual for point (3,6)?
The residual is equal to 6.5.
The given equation is y=5x-2.5 and the coordinate point is (3, 6).
The residual is the difference between the predicted value and the real value. Using the equation, we find for the value of y using the given value of x.
y = -2.5 + 5x
y = -2.5 + 5(3)
y = 12.5
Residual=actual y value−predicted y value,
The difference between this value and the given value of y is 12.5 - 6 = 6.5
Therefore, the residual is equal to 6.5.
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URGENT Which expression is equivalent?
The equivalent expression is log (yz/x²)
We have,
Using the logarithmic concept.
log a + log b = log ab
log a - log b = log (a/b)
log x² = 2 log x
Now,
We will use,
log_2 x = log x
Now,
-2 log x + 4 log y + 4 log z
= (4 log y + 4 log z) -2 log x
= log (yz) - log x²
= log (yz/x²)
Thus,
The equivalent expression is log (yz/x²)
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A sphere and a right cylinder have the same radius and volume. The cylinder has a height of 8 feet. Find the radius.
Step-by-step explanation:
Let r be the radius of both the sphere and the cylinder, and let V be their common volume. The volume of a sphere with radius r is (4/3)πr^3, and the volume of a right cylinder with radius r and height 8 is πr^2(8) = 8πr^3. Since the sphere and the cylinder have the same volume, we can set these expressions equal to each other:
(4/3)πr^3 = 8πr^3
Dividing both sides by πr^3 and simplifying, we get:
4/3 = 8
This is a contradiction, since 4/3 is not equal to 8. Therefore, there is no common radius that would make the sphere and the cylinder have the same volume.
What is the sum of all the integers between 18 and 75
Answer:
To find the sum of all integers between 18 and 75, we need to add up all the integers from 18 to 75. We can do this using the formula for the sum of an arithmetic series:
sum = (n/2) x (first term + last term)
where n is the number of terms in the series.
In this case, the first term is 18, the last term is 75, and we need to find the number of terms. We can do this by subtracting the first term from the last term and adding 1:
number of terms = last term - first term + 1
= 75 - 18 + 1
= 58
Now we can substitute these values into the formula:
sum = (n/2) x (first term + last term)
= (58/2) x (18 + 75)
= 29 x 93
= 2673
Therefore, the sum of all integers between 18 and 75 is 2673.
In a class of students, the following data table summarizes how many students have a brother or a sister. What is the probability that a student chosen randomly from the class is an only child? Has a brother Does not have a brother Has a sister 3 4 Does not have a sister 15 2
The probability that a student chosen randomly from the class has a brother is 13/30
From the attached two way table we can observe that the total number of students in the class = 20
To find the number of students having a brother, we need to add the number of students having a sister as well as brother i.e., 6 and the number of students having a brother but do not have a sister i.e.,7
so, we get the sum as 6 + 7 = 13
Let event A: a student chosen randomly from the class has a brother
n(A) = 13
The probability that a student chosen randomly from the class has a brother.
Using the definition of probability,
P(A) = n(A) / n(S)
P(A) = 13/20
This is the required probability.
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Find the complete question below.
Write the
expression in complete factored form.
3u(y - 3) - (y − 3) =
The given expression 3u(y - 3) - (y − 3) should be written in complete factored form as (3u - 1)(y - 3).
What is an expression?In Mathematics and Geometry, an expression simply refers to a type of mathematical equation which is typically used for illustrating the relationship that exist between two (2) or more variables and numerical quantities (number), without an equal to sign (symbol).
In this scenario and exercise, the simplest form of the given expression 3u(y - 3) - (y − 3) can be determined or calculated by simplifying it as follows;
3u(y - 3) - (y − 3) = 3uy - 9u - y + 3
On the other hand, the complete factored form of the given expression 3u(y - 3) - (y − 3) can be determined or calculated by simplifying it as follows;
3u(y - 3) - (y − 3) = (3u - 1)(y - 3)
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The average person falls asleep in 7 minutes. One researcher believed that elderly patients with dementia will take longer to fall asleep than normal. They examined a group of eight elderly dementia patients and found that they fell asleep in 7.2 minutes (SD = 1.1). Conduct the steps of hypothesis testing to determine whether elderly dementia patients really do take longer to fall asleep than average.
This is about hypothesis testing. The various steps required to determine whether elderly dementia patients really do take longer to fall asleep than average are given below.
What are the required steps for the above?The stages involved in testing a hypothesis are as follows:
1) First, state your hypotheses.
Elderly dementia sufferers fall asleep in the same length of time as the ordinary person (H0) (μ = 7)
An alternative hypothesis (Ha) is that elderly dementia patients sleep more slowly than the general population (μ > 7)
2) Determine the degree of importance in step two.
The problem does not specify the degree of relevance (α). Assume that α = 0.05.
3) Calculate the test statistic in step three.
To compare the sample mean to the population mean, we may use a one-sample t-test. The t-test formula is as follows:
t = (x - μ) / (s / √n)
where:
x = sample mean (7.2)
μ = population mean (7)
s = sample standard deviation (1.1)
n = sample size (8)
Plugging in the values, we obtain the folowing:
t = (7.2 - 7) / (1.1 / √ 8) = 1.62
4) Determine the crucial value in step four.
We must use the t-distribution to ascertain the critical value because this is a one-tailed test with a sample size of fewer than 30, and the population standard deviation is unknown. n - 1 equals 7 degrees of freedom.
The crucial value is 1.895 when using a t-table with 7 degrees of freedom and a one-tailed test with = 0.05.
Step 5: Make a choice and analyze the outcomes
We are unable to reject the null hypothesis since the computed t-value (1.62) is lower than the critical value (1.895).
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16
Find the exact value of x
X =
30
Do the side lengths form a Pythagorean triple?
O Yes
O No
The exact value of x is √1156 and it follows the Pythagorean triple
Finding the exact value of xFrom the question, we have the following parameters that can be used in our computation:
Legs of the right triangle = 16 and 30
Using the pythagoras theorem, we have
Hypotenuse^2 = the sum of the squares of the other lengths
So, we have
x^2 = 16^2 + 30^2
When evaluated, we have
x^2 = 1156
This gives
x = √1156
Hence, the exact value is √1156
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Find the volume of the triangular pyramid below. Round your answer to the nearest tenth if necessary.
The volume of the triangular pyramid is 150 cubic units.
Volume is defined as the space occupied within the boundaries of an object in three-dimensional space.
We have to find the volume of triangular pyramid
Volume = 1/3×B×h
B is the area of base
B=1/2×10×6
B=30 units
Height = 10 units
Volume = 1/2×30×10
=150 cubic units
Hence, the volume of the triangular pyramid is 150 cubic units.
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Which equation shows the point-slope form of the line that passes through (3, 2) and has a slope of?
Oy+2= (x+3)
Oy-2=(x-3)
○ y + 3 = (x + 2)
○y-3=(x-2)
Mark this and return
Save and Exit
Next
Submit
The equation that shows the point-slope form of the line which passes through (3, 2) is: y - 2 = (x - 3).
What is the Point-Slope Form Equation of a Line?The equation of any straight line on a coordinate plane can be expressed in point-slope form as:
y - b = m(x - a), where (a, b) is a point and m is the slope of the line.
Given the point a line goes through as (3, 2), which also has a slope (m) of 1, to find the equation of the line in point-slope form, substitute a = 3, b = 2 and m - 1 into y - b = m(x - a):
y - 2 = 1(x - 3)
y - 2 = (x - 3)
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The members of a soccer team want to choose a team captain, an assistant captain and an equipment manager. In how many ways can 3 people be selected from a team of 10?
The required there are 120 ways to choose a team captain, an assistant captain, and an equipment manager from a team of 10.
The number of ways 3 people can be selected from a team of 10 is given by the combination formula:
C(10, 3) = 10! / (3! (10 - 3)!)
= (10 x 9 x 8) / (3 x 2 x 1)
= 120
Thus, there are 120 ways to choose a team captain, an assistant captain, and an equipment manager from a team of 10.
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there are 32 students in Tima's math class this year, 1/8 of whom have studied foreign language. what percent of the students in class have studied foreign language?
can anyone help with this it’s due tonight -3(2y-8)+4x
Partition the following numbers involving decimals:
56.9
184.5
67.29
2.81
Intelligence Quotient (IQ) scores are often reported to be normally distributed with μ=100.0 and σ=15.0. A random sample of 57 people is taken.
Step 2 of 2 : What is the probability that the mean IQ score of people in the sample is less than 98? Round your answer to 4 decimal places, if necessary.
0.8942 = 89.42% probability of the mean IQ score of people in the sample is less than 98.
What is the Normal Probability Distribution?The Normal (or Gaussian) distribution is the most common continuous probability distribution. The function calculates the likelihood that an event will occur between any two real number limits as the curve gets closer to zero on either side of the mean. The area beneath the normal curve is always one.
Problems of normal distributions can be solved using the z-score formula.
In a set with mean and standard deviation, the z-score of a measure X is:
[tex]\text{z}=\dfrac{\text{x}-\mu}{\sigma}[/tex]
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.
This is the P-value of Z when X = 98.
[tex]\text{z}=\dfrac{\text{x}-\mu}{\sigma}[/tex]
[tex]\text{z}=\dfrac{(98 -100)}{15}[/tex]
[tex]\text{z}=-0.133[/tex]
z = -0.133 has a P-value of 0.8942
Hence, 0.8942 = 89.42% probability of the mean IQ score of people in the sample is less than 98.
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Raina and Shalhevet are running around a track. They run equally fast, but Raina started later. When Raina has run 5 laps, Shalhevet has run 15 laps.
When Raina has run 30 laps, how many laps has Shalhevet run?
Answer:18 laps for sure
Step-by-step explanation:
Let's say that Raina starts running when Shalhevet has already run for some time t (measured in laps). During this time, Shalhevet runs at a rate of 15 laps / t laps per lap, since she has run 15 laps in t laps.
We know that when Raina has run 5 laps, Shalhevet has run 15 laps. Since they run equally fast, we can say that Raina has caught up to Shalhevet and is now 10 laps behind.
Using this information, we can set up an equation to solve for the time t:
15/t = 5/(t-10)
Solving for t, we get t=25.
This means that when Raina has run 30 laps, Shalhevet has run 15 + (30-25)*(15/25) = 18 laps. Therefore, Shalhevet has run 18 laps when Raina has run 30 laps.
Shalhevet has run 6 sets of 15 laps each or 90 laps in total.
What is Equation?Two or more expressions with an Equal sign is called as Equation.
Raina and Shalhevet are running around a track.
When Raina has run 5 laps, Shalhevet has run 15 laps.
We have to find Raina has run 5 laps, Shalhevet has run 15 laps.
If Shalhevet runs 15 laps while Raina runs 5 laps, then the ratio of Shalhevet's laps to Raina's laps is 15:5 or 3:1.
This means that for every 3 laps Shalhevet runs, Raina runs 1 lap.
When Raina has run 30 laps, she has run 30/5 = 6 sets of 5 laps each.
Therefore, Shalhevet has run 6 sets of 15 laps each, or 6 × 15 = 90 laps in total.
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work it out plsssssssssss
Using point-slope formula, the equation of line passing through the point is y = x + 3
What is the equation of the line?To find the equation of the line that is passing through this point, we have to apply point-slope form of the equation.
y - y₁ = m(x - x₁)
We can substitute the values into the formula
y - 2 = 1(x - (-1))
y - 2 = x + 1
y = x + 1 + 2
y = x + 3
The equation of line is y = x + 3
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Can someone tell what the answer
The radius of the barrel which has the shape of a cylinder would be = 5 ft. That is option C.
How to calculate the radius of the given barrel?To calculate the radius of the barrel, the formula that should be used is the formula for the volume of a cylinder which is given below;
Volume of cylinder = πr²h
where;
π = 3.14
height = 10ft
radius = ?
Volume = 785.4 ft³
That is;3.
785.4 ft³ = 3.14× r² × 10
make r the subject of formula;
r² = 785.4/3.14×10
r = √ 785.4/3.14×10
= √ 785.4/31.4
= √25.01273885
r = 5ft
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Critical values for quick reference during this activity.
Confidence level Critical value
0.90 z∗=1.645
0.95 z∗=1.960
0.99 z∗=2.576
Jump to level 1
In a poll of 1000 randomly selected voters in a local election, 403 voters were against school bond measures. What is the sample proportion p^? (Should be a decimal answer)
What is the margin of error m for the 95% confidence level? (Should be a decimal answer)
The margin of error for the 95% confidence level is approximately 0.016.
What do you mean by a critical value?In statistics, a critical value is a value that is used to determine the acceptance or rejection of a null hypothesis, in a hypothesis testing procedure. The critical value is compared to the test statistic to determine if the null hypothesis can be rejected or not. Critical values are based on the significance level (alpha) and the degrees of freedom of the test. They are typically obtained from statistical tables or calculated using software or a calculator. The critical value is the boundary between the rejection region and the non-rejection region, and it helps to determine the likelihood of obtaining a certain result by chance.
The sample proportion can be calculated by dividing the number of voters against school bond measures by the total number of voters in the sample:
p = 403/1000 = 0.403
For a 95% confidence level, the critical value is 1.960 (from the table in the prompt).
The margin of error:
m = z × [tex]\sqrt{\frac{p*(1-p)}{n} }[/tex]
Substituting the given values, we get:
m = 1.960 × [tex]\sqrt{\frac{0.403*(1-0.403)}{1000} }[/tex]
m ≈ 0.0155
Therefore, the margin of error for the 95% confidence level is approximately 0.016.
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1. Describe the circumstances under which a confidence interval and hypothesis test yield the same results.
2. A poll asked college students in 2016 and again in 2017 whether they believed the First Amendment guarantee of freedom of the press was secure or threatened in the country today. In 2016, 2461 of 3062students surveyed said that freedom of the press was secure or very secure. In 2017, 1795 of 2026 students surveyed felt this way. Determine whether the proportion of college students who believe that freedom of the press is secure or very secure in this country has changed from 2016. Write the null and alternative hypotheses.
Answer:
A confidence interval and hypothesis test will yield the same results when the null hypothesis value is outside the calculated confidence interval. In other words, if the null hypothesis falls outside the confidence interval, the null hypothesis is rejected at the same level of significance used to calculate the confidence interval. Conversely, if the null hypothesis falls inside the confidence interval, it cannot be rejected.
Null hypothesis: The proportion of college students who believe that freedom of the press is secure or very secure in this country has not changed from 2016.
Alternative hypothesis: The proportion of college students who believe that freedom of the press is secure or very secure in this country has changed from 2016.
We can test this hypothesis using a two-sample z-test for proportions, where the two proportions being compared are the proportion of students who believed freedom of the press was secure or very secure in 2016 and the proportion who believed this in 2017. The test statistic is calculated as:
z = (p1 - p2) / sqrt( p(1-p) * (1/n1 + 1/n2) )
where p1 is the proportion of students who believed freedom of the press was secure or very secure in 2016, p2 is the proportion who believed this in 2017, n1 is the sample size for 2016, n2 is the sample size for 2017, and p is the pooled proportion of successes.
If the test statistic falls outside the critical values for the chosen level of significance, the null hypothesis can be rejected and we can conclude that the proportion of college students who believe that freedom of the press is secure or very secure in this country has changed from 2016.
Step-by-step explanation:
I need help with this
Answer:
π(5^2)(6) = 150π = 471.24
So 471.2 is the correct answer.
Step-by-step explanation:
Just plug in the given numbers into the given equation !
V = pi (5^2) (6) = 150 pi = 471.2 units^3
Kerry has a bag containing white and yellow marbles. Kerry randomly selects one marble from the bag records the result and returns the marbles to the bag the results of the first 65 selections are shown below
The probability that the next marble selected is white is given as follows:
63%.
How to calculate a probability?A probability is calculated as the division of the desired number of outcomes by the total number of outcomes in the context of a problem/experiment.
Out of a total of 65 trials, 41 white marbles were selected, hence the probability that the next marble selected is white is given as follows:
p = 41/65
p = 0.6308.
p = 63%. (rounded to the nearest percent).
Missing InformationWe have that, out of the 65 selections:
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Answer:63%
Step-by-step explanation:
f(n)=2*f(n-1), f(1)=3, what is the absolute value of f(24)
The absolute value of f(24) is 25165824 for the given recurrence relation.
As per the question, the recurrence relation as:
f(n) = 2 × f(n-1)
f(1) = 3
As we know that the geometric series is described as a series representing the sum of the terms in a finite or infinite geometric sequence.
This is a geometric sequence with a = 3 and r = 2.
The formula for the nth term of a geometric sequence is:
f(n) = ar⁽ⁿ⁻¹⁾
Substitute a = 3 and r = 2, we get:
f(n) = 3×2⁽ⁿ⁻¹⁾
So, the absolute value of f(24):
|f(24)| = 3 × 2⁽²⁴⁻¹⁾
|f(24)| = 3 × 2²³
|f(24)| = 25165824
Therefore, the absolute value of f(24) is 25165824.
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