Nine days ago, the area covered by the mold on a piece of bread was 3 square inches. Today the mold covers 9 square inches. What is the rate of change in mold's area?
Answers
Answer: The rate of change in mold's area would be 2 square inches per day.
Step-by-step explanation:
Given that,
The area covered by mold 3 days ago= 3 square inches
The area covered by mold today= 9 square inches
Change in area= 9-3= 6 square inches
Number of days during which this change occured= 3
So,
The rate of change in mold's area= change in area/number of days
The rate of change in mold's area= 6/3=2 square inches per day.
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 Change in area covered / time taken.
The rate of change = 6/9
= 2/3
The rate of change in mold’s area is 2/3 square inches per day.