Suppose that the water level of a river is 34 feet and that it is receding at a rate of 0.5 foot per day. Write an equation for the water level, L, after d days

The equation is L = 34 - 0.5d for the water level, L, after d days

Solution:

Given that, Suppose that the water level of a river is 34 feet

And that it is receding at a rate of 0.5 foot per day.

We have to write an equation for the water level, L, after d days

The equation can be framed for water level after d days which is found by calculating difference between initial level and receding level of water per day

Now, we know that,

water level after d days = initial level - receded level of water.

L = 34 feet - number of days spent x rate of receding level per day.

L = 34 feet - d days x 0.5 foot

L = 34 - 0.5d

Hence, the equation is L = 34 - 0.5d