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3 years ago

What is the length of BC? Round to the nearest tenth.

2 answers:

5 0

I think I'm not very sure and I don't want you to get it wrong!!!! i think this 21.3in if you are not sure look for more alternatives

Greeley [361]3 years ago

3 0

Answer:

B) 20.5

Step-by-step explanation:

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The length of the rectangle is 8cm longer than the width.

masya89 [10]

The length of the rectangle is 8cm longer than the width.
l=w+8
If the length of the original rectangle is increased by 6cm and the width is increased by 3cm the perimeter is 76cm.
p=76=((l+6)+(w+3))*2=(l+6+w+3)*2=(l+w+9)*2

to solve this substitute l=w+8 into the p= equation:
p=76=((w+8)+w+9)*2=
76=(2w+17)*2
76=4w+34
42=4w
10.5=w

l=w+8=10.5+8=18.5

4 0

4 years ago

A publisher reports that 75% of their readers own a particular make of car. A marketing executive wants to test the claim that t

Korolek [52]

Answer:

The p-value of the test is of 0.0536 > 0.02, which means that there is not sufficient evidence at the 0.02 level to support the executive's claim.

Step-by-step explanation:

A publisher reports that 75% of their readers own a particular make of car. A marketing executive wants to test the claim that the percentage is actually different from the reported percentage.

At the null hypothesis, we test if the proportion is of 75%, that is:

$H_0: p = 0.75$

At the alternate hypothesis, we test if the proportion is different of 75%, that is:

$H_1: p \neq 0.75$

The test statistic is:

$z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}$

In which X is the sample mean, $\mu$ is the value tested at the null hypothesis, $\sigma$ is the standard deviation and n is the size of the sample.

75% is tested at the null hypothesis:

This means that $\mu = 0.75, \sigma = \sqrt{0.75*0.25}$

A random sample of 280 found that 70% of the readers owned a particular make of car.

This means that $n = 280, X = 0.7$

Value of the test statistic:

$z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}$

$z = \frac{0.7 - 0.75}{\frac{\sqrt{0.75*0.25}}{\sqrt{280}}}$

$z = -1.93$

P-value of the test and decision:

The p-value of the test is the probability of finding a sample proportion differing from 0.75 by at least |0.7 - 0.75| = 0.05, which is P(|z| > 1.93), which is 2 multiplied by the p-value of z = -1.93.

Looking at the z-table, z = -1.93 has a p-value of 0.0268.

2*0.0268 = 0.0536.

The p-value of the test is of 0.0536 > 0.02, which means that there is not sufficient evidence at the 0.02 level to support the executive's claim.

5 0

3 years ago

I don’t know how to do this.

In-s [12.5K]

Step-by-step explanation:

THIS IS THE RIGHT ANSWER PLEASE BRAINLIEST ME PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE

5 0

2 years ago

I need help on this question!

Wittaler [7]

It C I think
Sorry if wrong

6 0

2 years ago

Debbie owns a clothing store that designs T-shirts and shorts. She sells the T-

balandron [24]

Answer:

$ 208

Step-by-step explanation:

This problem can be solved in a very simple way and the hourly earnings of each product are calculated.

That is, its sale value for the time it costs to create it:

For T-shirts: Each one is worth $ 6 but in one you can make two, therefore

$ 12 per hour.

For shorts: Each one is worth 13 and one is made per hour, therefore

$ 13 per hour

Which means that the most productive thing is to sell all shorts.

It can work 16 hours maximum, therefore it can make 16 shorts.

So:

13 * 16 = $ 208

And this would be the maximum value that can be obtained and complies with the restriction of at least 12 products but less than 24 products.

4 0

3 years ago