A scientist records the change in a lake's water level for 4 months as: -8 cm, -8 cm, -8 cm and a fourth value. The total change over the 4 months was -40 cm. What was the fourth month's change, and what was the average monthly change?

Question

Accepted Answer

fourth = -16 cm, average = -10 cm. First three sum to -24. Fourth = -40 - (-24) = -16 cm. Average = (-40) ÷ 4 = -10 cm.

A scientist records the change in a lake's water level for 4 months as: -8 cm, -8 cm, -8 cm and a fourth value.
The total change over the 4 months was -40 cm.
What was the fourth month's change, and what was the average monthly change?

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More Class 7 Division of Integers practice

A scientist records the change in a lake's water level for 4 months as: -8 cm, -8 cm, -8 cm and a fourth value.The total change over the 4 months was -40 cm.What was the fourth month's change, and what was the average monthly change?

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 7 Division of Integers practice

A scientist records the change in a lake's water level for 4 months as: -8 cm, -8 cm, -8 cm and a fourth value.
The total change over the 4 months was -40 cm.
What was the fourth month's change, and what was the average monthly change?