First one help me help!!!!!

Mathematics

2 answers:

denis-greek [22]3 years ago

5 0

u can use photomath to find the answer

Vlad [161]3 years ago

3 0

The second one, vertical compression

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A rectangle is twice as long as it is wide. Its perimeter is 30. What is its area?

Zarrin [17]

Answer:

It's area is 50.

Step-by-step explanation:

We can figure out that the length is 10 and the width is 5 since the rectangle is twice as long as it is wide. Then multiply L x W and the result is 50.

5 0

3 years ago

Use this information to answers Questions 1 through 7. The U.S. government provides money to each state to maintain the intersta

vladimir2022 [97]

Answer:

1. Null Hypothesis, $H_0$ : $\mu \leq$ 70 mph

Alternate Hypothesis, $H_A$ : $\mu$ > 70 mph

2. Value of test statistics is 2.652.

Step-by-step explanation:

We are given that Kansas Highway Patrol recorded the speed of 450 interstate vehicles and found the mean speed of 70.2 mph with standard deviation 1.6 mph.

We have to conduct a hypothesis test at significance level 0.01 to decide whether or not to reduce the money sent to Kansas.

Let $\mu$ = true mean speed of all vehicles on the Kansas interstate highway system.

SO, Null Hypothesis, $H_0$ : $\mu \leq$ 70 mph {means that the federal government will not reduce the amount of funding it provides as the speed limit is less than or equal to 70 mph}

Alternate Hypothesis, $H_A$ : $\mu$ > 70 mph {means that the federal government will reduce the amount of funding it provides as the speed limit exceed 70 mph}

The test statistics that will be used here is One-sample t test statistics as we don't know about the population standard deviation;

T.S. = $\frac{\bar X -\mu}{\frac{s}{\sqrt{n} } }$ ~ $t_n_-_1$