volume_mute
Water Reservoir – Solving Step by Step
publish date: 2026/05/07 20:14:24.022987 UTC
Over a week's time (7 days), engineers at a city water reservoir released enough water to lower the water level 105 feet. Complete the four-step solution:
Analyze: Total change = \(-105\) ft over 7 days.
Form: Change per day = \(-105 \div\) (1)
Solve: \(-105 \div 7 =\) (2) ft
State: The water level changed by (3) ft each day.
Correct Answer
(1) 7
(2) -15
(3) -15
Explanation
Total change as a signed number: \(-105\) ft. Divided equally over 7 days:
\[ -105 \div 7 = -15 \]
Unlike signs → negative. The water level dropped by 15 feet per day. Check: \(-15 \times 7 = -105\) ✓
Reference
go-math-science.com