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4 years ago

6

In any difference 6th grade class the ratio of boys and two girls is 3:2 how many boys and how many girls could there be in one

class is there more than one possible answer

1 answer:

Artemon [7]4 years ago

4 0

Yes there can be more than one answer because it can go on forever
3 to 2
6 to 4
9 to 6
12 to 8
it can go on forever

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One lap around the park is 0.65 mile. Hal ran 4.5 laps. How many miles did Hal run?

jeyben [28]

Answer:

2.925 miles

Step-by-step explanation:

$4.5\times 0.65=2.925$ miles. Hope this helps!

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1) The ages of trees in a forest are normally distributed with a mean of 25 years and a standard deviation of 5 years. Using the

8090 [49]

Answer:

1) 68%

2) 68%

Step-by-step explanation:

<h2>1) The ages of trees</h2>

We know the mean and the standard deviation.

The mean is:

$\mu=25$

The standard deviation is:

$\sigma=5$

The Z-score formula is:

$Z = \frac{x-\mu}{\sigma}$

For x=20 the Z-score is:

$Z_{20}=\frac{20-25}{5}=-1$

For x=30 the Z-score is:

$Z_{30}=\frac{30-25}{5}=1$

Then we look for the percentage of the data that is between $-1$ deviations from the mean.

According to the empirical rule 68% of the data is less than 1 standard deviations of the mean. This means that 68% of the trees are between 20 and 30 years old

<h2>2) Pizza delivery </h2>

First we calculate the Z-scores

We know the mean and the standard deviation.

The mean is:

$\mu=27$

The standard deviation is:

$\sigma=3$

The z-score formula is:

$Z = \frac{x-\mu}{\sigma}$

For x=24 the Z-score is:

$Z_{24}=\frac{24-27}{3}=-1$

For x=30 the Z-score is:

$Z_{30}=\frac{30-27}{3}=1$

Then we look for the percentage of the data that is between $-1$ deviations from the mean.

According to the empirical rule 68% of the data is less than 1 standard deviations of the mean. This means that 68% of pizzas are delivered between 24 and 30 minutes

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3 years ago

It takes 12 minutes to fill an entire bathtub using both the cold and hot water. if just the cold water is used, it takes 18 min

Lemur [1.5K]

Roughly 30 minutes to fill the bathtub due to vaporization.

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3 years ago