What is the change in the level of the water over a period of 6 weeks ?

Question

During the summer, the level of water in a pond decreases by 5 inches every week due to evaporation. What is the change in the level of the water over a period of 6 weeks ?

Answer 1

Decrease in water level per every week = 5 inches = (- 5) 

Decrease in water level per 6 weeks = (-5) × 6 . 

= – (5 × 6) 

= – 30 inches 

Change in the level of the water in the pond per 6 weeks is 30 inches decreased.