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3 years ago

1. A roller coaster is based all on: *

Mathematics

1 answer:

VLD [36.1K]3 years ago

6 0

D, A, B, A, D, B, A, C

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Nate and his friends are building a skateboard ramp for an upcoming contest. The length of the ramp on the blueprint is 7.6 inch

ICE Princess25 [194]

Answer:

30.4 feet.

Step-by-step explanation:

We have been given the length of the ramp on the blueprint is 7.6 inches. The scale on the blueprint is 1 inch to 4 feet. We are asked to find the actual length of the ramp.

We will use proportions to solve our given problem as:

$\frac{\text{Actual length}}{\text{Scale length}}=\frac{4\text{ ft}}{1\text{ inch}}$

Now, we will substitute the scale length of ramp in our proportion as:

$\frac{\text{Actual length}}{7.6 \text{ Inches}}=\frac{4\text{ ft}}{1\text{ inch}}$

$\frac{\text{Actual length}}{7.6 \text{ Inches}}\cdot 7.6 \text{ Inches}=\frac{4\text{ ft}}{1\text{ inch}}\cdot 7.6 \text{ Inches}$

$\text{Actual length}=4\text{ ft}\cdot 7.6$

$\text{Actual length}=30.4\text{ ft}$

Therefore, the actual length of the ramp would be 30.4 feet.

7 0

3 years ago

What’s the percent change of $0.70 and $3.89

Fofino [41]

Answer:

wait so are you adding or

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3 years ago

sandy has a measuring cup that can measure to the nearest tenth of a milliliter of sandy measures the oil in each container the

xz_007 [3.2K]

1\10 of a milliliter

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3 years ago

Researchers interviewed street prostitutes in Canada and the United States. The mean age of the 100 Canadian prostitutes upon en

levacccp [35]

Answer:

Step-by-step explanation:

The null and the alternative hypothesis is:

$H_o: \mu_c \ge \mu_{us}$

$H_a : \mu_c < \mu_{us}$

The t- student test statistics can be computed as:

$t = \dfrac{x_c- x_{us}}{\sqrt{\dfrac{\sigma_c^2}{n_c} + \dfrac{\sigma_{us}^2}{n_{us}} }}$

$t = \dfrac{19- 21}{\sqrt{\dfrac{7^2}{100} + \dfrac{8^2}{130} }}$

t = -2.017

degree of freedom = (n₁ - 1) + (n₂ - 1)

= (100 - 1) + (130 - 1)

= 228

Using the data of t-value and degree of freedom;

The P-value = -0.224

Decision rule: Do not reject the null hypothesis if the p-value is greater than ∝(0.01)

Conclusion: We reject the null hypothesis since the p-value is less than ∝.

Therefore, there is enough evidence to conclude that the mean age of entering prostitution in Canada is lower than that of the United States.

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3 years ago

What is the median test score?<br> A)2.5<br> B)2<br> C)3<br> D)5

EleoNora [17]

It depends on the number of questions then you see how many points each question is

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3 years ago

Read 2 more answers