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statuscvo [17]
3 years ago
8

Some1 help me plus, I need this done by friday 20 points

Mathematics
1 answer:
xz_007 [3.2K]3 years ago
3 0
The answer is 80. This is because we can find the area of one of the triangles by (4*8)/2 = 16. We multiply this by 4 since there are 4 triangles. 16*4 = 64. Now finally, we add the area of the base to this value. 4*4+64=80. Therefore the answer is 80 cm^2
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16÷4 what is the quotient expressed as a fraction
Olenka [21]

Answer:

I'm guessing what your asking is this equation or expression in fraction form? If so, then it would be 16/4 which equals 4.

Step-by-step explanation:

8 0
3 years ago
An IQ test is designed so that the mean is 100 and the standard deviation is 12 for the population of normal adults. Find the sa
Julli [10]

Answer:

Step-by-step explanation:

Given that IQ mean is 100 and std dev = 12 for normal adults

Confidence level =90%\\Z critical value = 1.645\\Margin of error = 2\\Margin of error = 1.645* std error =2\\Std error = 1.216

Std error = \frac{12}{\sqrt{n} } =1.216

n=(\frac{12}{1.216} )^2 =97.38

i.e. sample size should be atleast 97

The required sample size is 97.

This is reasonable as this is greater than 30

Yes. This number of IQ test scores is a fairly large number.

5 0
3 years ago
The radius of a sphere is multiplied by . What effect does this have on the volume of the sphere? A. The volume of the sphere is
Greeley [361]

Answer:

Option A. The volume of the sphere is multiplied by 1/343.

Step-by-step explanation:

The volume of a sphere can be obtained by the following formula:

V = 4/3πr^3

Let the initial volume (V1) of the sphere be:

V1 = 4/3πr^3 = (4πr^3)/3

Now, if we multiply the radius by 1/7, then the new volume (V2) of the sphere will be:

V2 = 4/3 x π x (1/7r)^3

V2 = 4/3 x π x 1/343r^3

V2 = (4πr^3)/1029

Now we determine the ratio of V2 : V1 as shown below:

V2/V1 = (4πr^3)/1029 ÷ (4πr^3)/3

V2/V1 = (4πr^3)/1029 × 3/(4πr^3)

V2/V1 = 3/1029

V2/V1 = 1/343

V2 = 1/343 x V1

Therefore, the volume of the sphere is multiplied by 1/343.

3 0
3 years ago
If sin(x) = M, with M > 0, find the value of then sin(x - pi) =
Alexus [3.1K]

Step-by-step explanation:

sin(x) = M, M > 0

= sin(x - π)

= sin(x)cos(π) - cos(x)sin(π)

= sin(x).(-1) - cos(x).0

= -sin(x) - 0

= -sin(x)

= -M

7 0
2 years ago
List three tools and equipment needed for baking​
vivado [14]

Answer:

oven, whisk, pan

Step-by-step explanation:

6 0
3 years ago
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