Question

The water level of a lake fell by -11/2 inches during a 12/3 week-long dry spell. Find the average rate at which the water level changed every week.

Answer 1

Average rate at which the water level changed every week = -1.375 inches

Explanation:

The water level of a lake fell by -11/2 inches during a 12/3 week-long dry spell.

Total fall of water level = -11/2 inches = -5.5 inches

Time of fall = 12/3 week = 4 weeks

`\texttt{Average rate at which the water level changed every week}=\frac{\texttt{Total fall of water level}}{\texttt{Time of fall}}\\\\\texttt{Average rate at which the water level changed every week}=(-5.5)/(4)\\\\\texttt{Average rate at which the water level changed every week}=-1.375\texttt{inch per week}`

Average rate at which the water level changed every week = -1.375 inches