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Artyom0805 [142]
2 years ago
5

I need help with this worksheet I don't understand from 12-14​

Mathematics
1 answer:
siniylev [52]2 years ago
3 0

Answer:

13.jawaban nya

c.

14.jawaban nya

A.

15.jawaban nya

c.

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A candy store called "Sugar" built a giant hollow sugar cube out of wood to hang above the entrance to their store. It took 5454
Elina [12.6K]

Answer:

27 ft^3

Step-by-step explanation:

The total surface area of the cube is 54 ft^2.

A cube has 6 congruent square sides.

54 ft^2/5 = 9 ft^2

Each square side has area 9 ft^2.

The area of a square is the square of the side, so the side of a square is the square root of the area.

side = sqrt(9 ft)^2 = 3 ft

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volume = (3 ft)^3

volume = 27 ft^3

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An automobile manufacturer claims that its car has a 35.935.9 miles/gallon (MPG) rating. An independent testing firm has been co
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<h2>Answer with explanation:</h2>

Let \mu be the population mean.

For the given claim , we have

Null hypothesis : H_0: \mu=35.9

Alternative hypothesis :  H_a: \mu\neq35.9

Since alternative hypothesis is two-tailed , so the test is a two-tailed test.

Given : Sample size : n=220  ;

Sample mean: \overline{x}=35.6  ;

Standard deviation: s=2.2

Test statistic for population mean:

z=\dfrac{\overline{x}-\mu}{\dfrac{s}{\sqrt{n}}}

z=\dfrac{35.6-35.9}{\dfrac{2.2}{\sqrt{220}}}\approx-2.02

By using the standard normal distribution table of z , we have

P-value ( two tailed test ) : 2P(Z>|z|)=2(1-P(Z

=2(1-P(z

Since , the P-value is greater than the significance level of \alpha=0.02 , it means we do not have sufficient evidence to reject the null hypothesis.

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