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3 years ago

The perimeter of triangle ABC is 13 cm .It was dilated to create A’B’C’ What is the perimeter of triangle A’B’C

Mathematics

1 answer:

Bad White [126]3 years ago

5 0

Answer:

still 13

Step-by-step explanation:

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Mr. Wolboldt and Mrs. Wolboldt went to Bob Evans for lunch. Their bill for the food was $26.50. If they plan on leaving a 20% ti

Finger [1]

Answer: 31.80

Step-by-step explanation:

First you divide 26.50 by 0.20 to get 5.3 then you add that to the starting total and you get your answer which is

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3 years ago

A map website claims to be available 99.995% of the time (measured in minute long increments). Suppose

White raven [17]

Answer:

Skewed to the left

Step-by-step explanation:

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3 years ago

A Confidence interval is desired for the true average stray-load loss mu (watts) for a certain type of induction motor when the

Vaselesa [24]

Answer:

A sample size of 35 is needed.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.95}{2} = 0.025$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.025 = 0.975$ , so $z = 1.96$

Now, find the width W as such

$W = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

How large must the sample size be if the width of the 95% interval for mu is to be 1.0:

We need to find n for which W = 1.

We have that $\sigma^{2} = 9$ , then $\sigma = \sqrt{\sigma^{2}} = \sqrt{9} = 3$ . So

$W = z*\frac{\sigma}{\sqrt{n}}$

$1 = 1.96*\frac{3}{\sqrt{n}}$

$\sqrt{n} = 1.96*3$

$(\sqrt{n})^2 = (1.96*3)^{2}$

$n = 34.57$

Rounding up

A sample size of 35 is needed.

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3 years ago

The function f(x)=x2+1x-3 written in vertex form

Alisiya [41]

Y=(x+1/2)^2-13/4 is the answer to this question.

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4 years ago

A rate of 8 feet per second is equal to how many feet per minute?

marysya [2.9K]

Answer:

480 feet per minute

Step-by-step explanation:

Since we are given 8 feet per second and we know there are 60 seconds in a minute,

we multiply:

8x60= how many feet per minute.

last step: so we know there are 480 feet per minute by multiplying 60 and 8.

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3 years ago

Read 2 more answers