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Vitek1552 [10]
3 years ago
15

A gazelle runs 780 feet in 12 seconds. Angela wants to determine how far a gazelle could run in 1 minute at this rate. Explain h

ow to use equivalent fractions to find the distance a gazelle could run in 1 minute. Then write the equivalent fractions.
Mathematics
1 answer:
Hitman42 [59]3 years ago
4 0

Answer:

In 1 min a gazelle runs 3,900 ft.

As a fraction, 1/65

In order to find the solution to this problem you could use a table.

Since we are using seconds we have to convert the 1 min = 60 seconds.

<u>Sec</u><u>   |  12    |    60</u>

<u>Fts</u><u>    |  780  |    x  </u>

12 goes into 60 5 times, so we have to multiply 780 by 5 which gives us 3900.

x=3900

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A sample of 13 sheets of cardstock is randomly selected and the following thicknesses are measured in millimeters. Give a point
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<h3>Answer:  0.061</h3>

===============================================

Explanation:

Add up the values to get

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So the mean is approximately 1.8876923

---------------------

Now make a spreadsheet as shown below

We have the first column as the x values, which are the original numbers your teacher provided. The second column is of the form (x-M)^2, where M is the mean we computed earlier. We subtract off the mean and square the result.

After we compute that column of (x-M)^2 values, we add them up to get what is shown in the highlighted yellow cell at the bottom of the column.

That sum is approximately 0.04403076924

Next, we divide that over n-1 = 13-1 = 12

0.04403076924 /12 = 0.00366923077

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sqrt(0.00366923077) = 0.06057417576822

This rounds to 0.061 which is the final answer.

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