Question

Suppose that the water level of a river is 340 meters and that it is receding at a rate of 0.5 meters per day. Write and equation for the water level, L, after d days. In how many days will the water level be 260m?

Answer 1

The equation for the water level, L, after d days can be written as:

L = 340 - 0.5d

To find in how many days the water level will be 260m, we can substitute L = 260 into the equation and solve for d:

260 = 340 - 0.5d

0.5d = 340 - 260

0.5d = 80

d = 80 / 0.5

d = 160

Therefore, the water level will be 260m after 160 days.

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