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Korolek [52]
3 years ago
9

The number of kids in a robotics club grew from 23 to 31. What was the percent increase in the number of kids in the club? Round

your answer to the nearest whole percent.
Mathematics
1 answer:
konstantin123 [22]3 years ago
8 0

Answer: 35\%

Step-by-step explanation:

For this exercise you need to use the following formula:

\%increase=\frac{New\ value-Old\ value}{Old\ value}*100

According to the exercise, the number of kids in a robotics club grew from 23 to 31; then you can identify that:

New\ value=31\\\\Old\ value=23

Knowing these values, you can substitute them into the equation and then evaluate, in order to find the percent increase in the number of kids in the club. Then:

\%increase=\frac{31-23}{23}*100\\\\\%increase=34.78\%

Rounding it to the nearest whole percent:

\%increase=35\%

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A. The approximate height of the building is 100 m

B. We can use the arc length formula to obtain an approximation of BC since angle A is small.

A.

The approximate height of the building is 100 m

To find the approximate height of the building, we consider the diagram.

From the diagram, we have that using trigonometry,

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Now

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B.

We can use the arc length formula to obtain an approximation of BC since angle A is small.

<h3 /><h3>Arc Length Formula</h3>

We know that the arc length formula L = rФ where

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Now BC = ABtanA

We know that Ф ≅ tanФ when Ф is small.

<h3 /><h3>The comparison</h3>

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So, we can use the arc length formula to obtain an approximation of BC since angle A is small.

Learn more about approximate height of building here:

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