On Julyâ 1, a pond was 22 ft deep. Since thatâ date, the water level has dropped two thirds ft per week. For what dates will the water level not exceed 18 âft?

Answer: The date in which the water level will not exceed 18ft is August 12 (6 weeks after July 1)

Step-by-step explanation:

Given:

Initial water level = 22ft

Final water level = 18ft

Total water level change = 22-18 = 4ft

Rate of change of water level = 2/3 ft/week

Using the formula;

Total change = rate * time

Time = total change/rate

Substituting the values of the rate and total water level change.

Time = 4 / (2/3) week = 4 * 3 : 2 = 6weeks.

From July 1 + 6 weeks = August 12

The date in which the water level will not exceed 18ft is August 12 (6 weeks after July 1)