Question

Nine days ago the area covered by the piece of bread was 3 sq inches. Total, the mold covers 9 sq inches . what is the rate of change in modls area ?

Answer 1

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Answer 2

Answer:

The rate of change in mold's area is 2/3 square inches per day.

Step-by-step explanation:

Given : Nine days ago the area covered by the piece of bread was 3 sq inches. Total, the mold covers 9 sq inches.

To find : What is the rate of change in molds area ?

Solution :

The area covered by the mold nine days ago= 3 square inches.

The area covered by the mold in the present time= 9 square inches.

The change in area covered by mold is = 9-3=6 square inches

6 square inches change occurred in 9 days.

Now, The rate of change in mold's area is

$\text{Rate of change}=\frac{\text{Change in area covered}}{\text{Time taken}}$

$\text{Rate of change}=\frac{6}{9}$

$\text{Rate of change}=\frac{2}{3}$

The rate of change in mold's area is 2/3 square inches per day.