help please 40 points answer correct please

9514 1404 393

Answer:

Step-by-step explanation:

The area of each triangular face is given by the formula ...

  A = 1/2bh

The triangular faces have a base of b=8 cm, and a height of h=6 cm. Their area is ...

  A = 1/2(8 cm)(6 cm) = 24 cm²

__

Each of the rectangular faces has a length of 20 cm. The width depends on which face is of interest. In each case, the area is given by ...

  A = LW

Bottom face: A = (20 cm)(8 cm) = 160 cm²

Back face: A = (20 cm)(6 cm) = 120 cm²

Sloped face: A = (20 cm)(10 cm) = 200 cm²

__

The total area is the sum of the areas of all of the faces and bases. There are two triangular bases, so the total area is ...

  (2×24 + 160 +120 +200) cm² = 528 cm²

Answer:

Step-by-step explanation:

Step 1. The point estimate is the difference between the the mean amount of mail-order purchases and the mean amount of internet purchases. It becomes

74.9 - 87.3 = - 12.4

Step 2. The formula for determining margin of error is expressed aa

Margin of error = z√(s1²/n1 + s2²/n2)

Where

z = z score

s1 = sample standard deviation for data 1

s2 = sample standard deviation for data 2

n1 = number of samples in group 1

n2 = number of samples in group 2

For a 95% confidence interval, the z score is 1.96

From the information given,

s1 = 21.75

n1 = 18

s2 = 19.75

n2 = 9

z√(s1²/n1 + s2²/n2) = 1.96√(21.75²/18 + 19.75²/9) = 1.96 × 8.343

= 16.35

Step 3. Confidence interval = (x1 - x2) ± z√(s²/n1 + s2²/n2)

95% Confidence interval = - 12.4 ± 16.35

Answer:

Maybe

Step-by-step explanation:

8 possibly could be a number

Answer:

For part C I got n = negative 1 plus or minus the square root of 145, everything divided 4.

Step-by-step explanation:

My part A and B were the same as the persons above answer.

(A) The least common denominator of the equation is  ±√2 - 2.

(B) The value of n = ±√2 - 2 must be excluded from the list of possible solutions.

(C) The solution of the equation 1 + n + 6 / n + 1= 4 / n - 2 is ±√2 - 2.

What is an equation ?

An equation is a combination of different variables, in which two mathematical expressions are equal to each other.

The given equation is,

1 + n + 6 / n + 1= 4 / n - 2.

(A)

The least common denominator of the equation is n.

(B)

The value of n must be excluded from the list of possible solutions.

(C)

To find the solution for the given equation,

Solve the equation,

2 + n + 6/n - 4/n + 2 = 0

4 + n + 2/n = 0

4n + n² + 2 = 0

n² + 4n + 2 = 0

n² + 4n + 4 + 2 - 4 = 0

(n + 2)²  = 2

n + 2 = ±√2

n = ±√2 - 2

The required value of n is ±√2 - 2.

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Answer:

V= a^3 = 53 = 125m³

Step-by-step explanation:

Answer:

125 m cubed

Step-by-step explanation:

because length x width x height

Answer:

The length of the prism = 3m

See below for explanation

Step-by-step explanation:

The question is incomplete without the diagram stated in the question.

Since the diagram is missing, I'll show you how you can determine the length of a prism.

Volume of prism = length × width × height = l×w×h

Find attached below the diagram used in solving the question.

From the diagram,

height = 7m

Width = 2m

Given that the volume of prism = 42 cubic meters = 42m³

Length of prism = ?

Inserting the values of the variables:

42 = l×2×7

42 = 14×l

l = 42/14

l = 3

The length of the prism = 3m

Answer:

bro I think its 14

Step-by-step explanation:

si paps

The length of RT is 14 cm. Therefore, option D is the correct answer.

Given that, RS=9, ST=8, RT=s and ∠RST=111°.

The cosine formula to find the side of the triangle is given by: c = √[a²+ b²– 2ab cos C] Where a,b and c are the sides of the triangle.

Here, given a²= b²+ c²– 2bc cos A.

s²= 9²+ 8²– 2×9×8 cos111°

⇒s²=81+64+51.552

⇒s²=197.552

⇒s=14.05≈14 cm

Therefore, option D is the correct answer.

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Answer:

25% of 1000 is 250

Step-by-step explanation:

(25 ÷ 100) × 1000

Divide the numbers

0.25 × 1000

0.25 × 1000

Multiply the numbers

250

250

Answer:250

Step-by-step explanation:

25% of 1000

25/100 x 1000

(25x1000)/100

25000/100=250

a sample that excludes subjects that are not part of the population being measured.

Answer:

1 and kmn

Step-by-step explanation:

Prime numbers are numbers that are divisible by themselves only.

Example:

k- 1 and k are the factors

Answer:

1,

k*m*n,

k*m,

m*n,

k*n,

k,

m,

n

Step-by-step explanation:

Answer: 0.00494.

Step-by-step explanation:

Given : The proportion of the company's orders come from first-time customers. [tex]p=0.45[/tex]

Sample size : n= 166

Now , the probability that the sample proportion is between 0.24 and 0.35 would be :-

[tex]P(0.24<p<0.35)=P\left({\dfrac{0.24-0.45}{\sqrt{\dfrac{0.45(1-0.45)}{166}}}<\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}<\dfrac{0.35-0.45}{\sqrt{\dfrac{0.45(1-0.45)}{166}}}}\right)\\\ \ \left[\because z=\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}\right][/tex]

[tex]=P(-5.44<z<-2.58)=P(z<-2.58)-P(z<-5.44)\\\\=1-P(z<2.58)-(1-P(z<5.44))\\\\=P(z<5.44)-P(z<2.58)\\\\=1-0.99506\ [\text{By z-value table}]\\\\=0.00494[/tex]

Hence, the probability that the sample proportion is between 0.24 and 0.35 is 0.00494.

Answer: We concluded that annual income and education level are not independent.

Step-by-step explanation:

For the given situation, the null and alternate hypothesis can be formulated as:

[tex]H_0:[/tex] annual income and education level are independent.

[tex]H_a:[/tex] annual income and education level are not independent.

Given,  the value of test statistic is 24.32 and the critical value of test statistics is 13.32.

i.e. the test statistic value is greater than the critical value, thus we have enough evidence to reject the null hypothesis.

Therefore, we reject null hypothesis .

So , we concluded that annual income and education level are not independent.

Answer:

The numbers are suppose to be natural numbers that is positive integers form 1 upward. So the numbers will be 5 and 6.  

Step-by-step explanation:

The product of 2 consecutive natural numbers is 19 greater than their sum . We need to understand important terms in this question like consecutive and natural numbers.

Consecutive numbers are numbers that follows each other continuously from smallest to largest.  Natural numbers are numbers that includes all the positive numbers from 1 to infinity example 1, 2, 3, 4............infinity.

Let the consecutive number be a and a+1.

The product of this 2 numbers are when you multiply them. Therefore,

a(a + 1) = a² + a

The sum of the 2 numbers are their addition. Therefore,

a + (a + 1) = 2a + 1

The product is 19 greater than the sum. This means the product of this numbers minus the sum of this numbers is equals to 19.

a² + a - (2a + 1) = 19

a²+ a - 2a - 1 = 19

a²- a - 20 = 0

Find the numbers that can be multiplied to get -20 and added together to get -1. The numbers are 4 and -5

a² + 4a - 5a - 20  = 0

a(a + 4) - 5(a + 4) = 0

(a + 4)(a - 5) = 0

a = - 4 and a = 5

The numbers are suppose to be natural numbers that is positive integers from 1 upward. So the numbers will be 5 and 6.  

To prove it

5 × 6 = 30(products)

5 + 6 = 11(sum)

30 - 11 = 19

Answer:

$27.98

Step-by-step explanation:

100 - 30 in price %=70%

Price will be 70% of original regular price

$39.98 * .7 = answer

Answer:

Discount is $11.99

Total is now $27.99

Step-by-step explanation:

To find the discount, you find out what 30% is of 39.98, so you multiply

39.98 x 30%(or .3) = 11.994

39.98- 11.99= 27.99

Answer:

11.36

Step-by-step explanation:

A=1/2*b*h

62.5=1/2*11*x(height)

62.5= 1/2*11*x

62.5=5.5*x

X=62.5/5.5

=11.36

Answer: rectangular prism

Step-by-step explanation:

Answer:

60

Step-by-step explanation:

they each have 3 boxes, so you can multiply 3 by 2 to get 6. if each box has 10 crayons, then multiply 6 by 10 to get 60.

The total number of crayons that Alex and Annie have in all will be 30 crayons.

Algebra is the study of abstract symbols, while logic is the manipulation of all those ideas.

The acronym PEMDAS stands for Parenthesis, Exponent, Multiplication, Division, Addition, and Subtraction. This approach is used to answer the problem correctly and completely.

Alex and Annie each have 3 boxes of crayons. Each box has 10 crayons. Then the total number of crayons is given as,

Total = 3 x 10

Total = 30

The total number of crayons that Alex and Annie have in all will be 30 crayons.

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Answer:

because it looks terrifying:( i feel so bad 4 u

Answer:

9

Step-by-step explanation:

Not sure if it is right, don't at me :)

Question:

1. How many full boxes of lemon bars can Shira fill?

2. How many delicious lemon bars will she be taking home?

Answer:

1. Number of filled box = 21

2. Number of take home = 2

Step-by-step explanation:

Given

Number of lemon bars = 170

Each bar contains 8 lemon bars

Required

(1) & (2)

To calculate the number of boxes Shira can fill, we simply divide the total number of bars by constituents of each bar .

i.e.

Number of filled box = 170/8

Number of filled box = 21.25

But here, we only need the quotient of the division because it represents the filled boxed.

So,

Number of filled box = 21

Calculating the number of take home.

We'll follow the same steps as (1) above but here, we only need the remainder of the division.

When 170 is divided by 8, the remainder is 2.

So, number of boxes she'll take home is 2.

See calculation below

Number of take home = 170 % 8

Number of take home = 2

Answer:

The man has been dead for 9 days. This is because this is the only day on the chart where all the types of insects coexist.

Step-by-step explanation:

5 species of insects were found at the same time alive on the dead man's body.

These 5 insects are then sent to the lab to be studied and larvae/eggs from them, raised under similar conditions to the conditions of the dead body.

The activity the eggs are them studied and presented in the chart provided

Insect/Day 1 2 3 4 5 6 7 8 9 10

Blowfly 1 1 1 1 1 1 1 1 1 0

Species A 0 0 0 0 1 1 1 1 1 1

Species B 0 0 0 0 0 0 1 1 1 0

Species C 0 0 0 0 0 0 0 0 1 1

Species D 0 0 0 0 0 1 1 1 1 1

Note that 0 represents a non-activity on the part of the egg of the insect specie.

From the chart, the first time all 5 insects coexist together at the same time just like they were found in the dead body is on the 9th day. Before the 9th day, all 5 insects do not coexist at the same time and even beyond the 9th day, on the 10th day, insect specie B stops existing.

So, it is evident that the man has been dead for 9 days as that's the only day on the chart where all the types of insects coexist.

Hope this Helps!!!

Answer: I believe the answer you're looking for is absolute value

I hope this helps!!!

Answer:

  geometric, 1/4

Step-by-step explanation:

An arithmetic sequence will have a common difference. A geometric sequence will have a common ratio. If neither of those describes the sequence, it is "neither."

Obviously the difference between numbers in this sequence is decreasing, so this is not an arithmetic sequence.

__

The ratios of adjacent terms are ...

  -320/-1280 = -80/-320 = -20/-80 = -5/-20 = 1/4

The sequence is a geometric sequence with a common ratio of 1/4.

Answer:

y=-3x+b

Step-by-step explanation:

Find slope

-1-(-10)/2-5

9/-3

-3 is slope

y=-3x+b

substitute (2,-1)

-1=6+b

b=-7

y=-3x-7

Answer:

7

Step-by-step explanation:

15 plus 6 equals 21

21 divided by 3 is 7

Answer:7

Step-by-step explanation:

sum of 15 and 6

15+6=21

1/3 Of The sum

1/3 of 21

1/3 x 21

(1x21)/3

21/3=7

Answer:

(24 + 12) x 2 = 72 inches

Answer:

Part A:  8x + 24

Part B:  Expressions M and N are not equivalent for any value of x because if you do 8x + 24 = 8x + 10, the 8x will cancel out from both sides and you are left with 24 = 10, which is not true, and therefore has no solution.

Step-by-step explanation:

For Part A, to apply the Distributive Property, you multiple the 4 with both terms in the parentheses. So, you do 4(2x) + 4(6). This expression is equal to 8x + 24.

Hope this helped! :)

Answer:24

Step-by-step explanation:

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Answer:

-48.25

Step-by-step explanation:

You will start by using PEMDAS- Parenthesis-Exponent-Multiplication-Division- Addition-Subtraction

[tex]5.75-12(20/2.5)/2+6\\5.75-12(8)/2+6\\5.75-96/2+6\\5.75-48+6\\5.75-54= -48.25[/tex]

Answer:

48.25  or 9.75

Step-by-step explanation:

5.75-54=48.25