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3 years ago

mary goes running each day. in 3 hours she runs a total of 7 miles. how many miles does she run in 1 hour

Mathematics

1 answer:

Mashutka [201]3 years ago

3 0

Simply set up a proportion: hours/miles=hours/miles

3/7=1/x.

Cross multiply to get 3x=7. Divide by 3 to get 7/3.

Therefore, Mary runs 7/3 miles in an hour.

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Isabella ran the 100-meter dash five times. The time it took her to complete each race, in seconds, was 12.7, 12.807, 12.78, 12.

Stells [14]

Given:

Number of 100-meter races = 5

The time it took Isabella to complete each race, in seconds, was 12.7, 12.807, 12.78, 12.08, and 12.087.

To find:

The decimals in order from greatest to least.

Solution:

The time it took Isabella to complete each race, in seconds, was shown below:

12.7, 12.807, 12.78, 12.08, 12.087

We need to arrange this data in descending order.

In all 5 numbers the digits before decimals are same. On comparing the digits on the tenth place and hundredth place, we get

12.807 > 12.78 > 12.7 > 12.087 > 12. 08

Therefore, the required order of given data is 12.807, 12.78, 12.7, 12.087, 12. 08.

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3 years ago

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2 years ago

A square lawn has a length of 8 feet and a width of 8 feet. Eight researchers each examine a randomly chosen

Goshia [24]

The best approximation to the number of seedlings that are at least 2 inches high in the entire lawn is:

D. 6,400

<h3>Total Seedlings Calculation.</h3>

To identify the total number of seedling in the entire lawn, first you must add all the seedling counted by the researchers:

Counted seedlings = 82 + 87 + 95 + 99 + 102 + 106 + 111 + 115
Counted seedlings = 697

Now, you must divide 697 in the number of regions taken by the researchers ( in this case were 8), this to obtain the average:

Average seedlings by region = $\frac{697}{8}$
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Now, how we know, the entire lawn has a length of 8 feet and a width of 8 feet, it means 64 regions of one feet by one feet, by this reason, we multiply the average of seedlings by the whole regions in the lawn:

Number of seedlings in the lawn = 87.125 * 64
Number of seedlings in the lawn = 5576

Taking into account the average of seedlings is 5576, the best approximates of seedlings that are at least 2 inches high in the entire lawn is 6400.

More information about Approximations:

brainly.com/question/12849458?referrer=searchResults

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I Think First You Would Need To Turn It Into A Improper Fraction Then Divide The Denominator Into The Numerator .. Simply If Needed

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