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3 years ago

7

I will give u brainliest

1 answer:

spayn [35]3 years ago

4 0

Answer:

9

Step-by-step explanation:

sqrt(85) is about 9.2, and the question asks to round to the nearest integer, making it 9. 9.2^2 is almost 85, which is how you can check your answer.

You might be interested in

A desk manufacturer claims that the average time it takes to assemble a desk is 90 minutes with a standard deviation of 32 minut

stealth61 [152]

Answer:

The standard deviation of the sample mean is 4 minutes

Step-by-step explanation:

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean $\mu$ and standard deviation $\sigma$ , the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean $\mu$ and standard deviation $s = \frac{\sigma}{\sqrt{n}}$ .

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

In this problem, we have that:

The standard deviation of the population is 32.

Sample of 64.

So

$s = \frac{32}{\sqrt{64}} = 4$

The standard deviation of the sample mean is 4 minutes

6 0

3 years ago

Please help. Jordan bikes at a speed of 8 2/3 mph. How many miles will he bike in 3 hours and 6 minutes(Fraction form)

Tamiku [17]

Answer:

$26 \frac{13}{15}$ miles

Step-by-step explanation:

Let's convert 8 and 2/3 to an improper fraction

8 2/3 = 26/3

Lets convert 3 hours and 6 minutes over a fraction of 60 minutes

3 hours 6 minutes = 186 minutes/60 minutes = 186/60

Multiply both improper fractions:

$\frac{26}{3} \cdot \frac{186}{60} = \frac{4836}{180} = 26.866.... = 26 \frac{13}{15}$

-Chetan K

6 0

3 years ago

At the movie theatre, child admission is $5.40 and adult admission is $9.60 . on saturday, four times as many adult tickets as c

Burka [1]

Wer,ktjvhn,sjdnh,fcgjxhdntg

8 0

3 years ago

What are they?? I need help

nika2105 [10]

Answer:

a,f,i, and k are acute angles

b and c are obtuse angles

e,g and j are reflex angles

Step-by-step explanation:

acute angles are angles less than 90 and range at 60°

obtuse angles are angles greater than 90° but less than 180°

reflex angles are angles greater than 180° but less than 360°

3 0

3 years ago

a man buys a dozen cameras for $1800. He sells them at a profit of $36 each. Express his profit as a percentage of his selling p

Helga [31]

First of all, we need to deduce the price of a single camera:

$\dfrac{1800}{12}=150$

Now, we know that he profits 36 dollars from each camera. So, we are asking: which percentage of 150 is 36? We have

$36 = 150\cdot\dfrac{x}{100}$

This equation literally says: 36 is x-percent of 150. And we need to solve for x:

$x=\dfrac{36\cdot 100}{150} =24$

6 0

3 years ago