The quantity of pollutant remaining in a lake if it is removed at 2 % a year for 6 years.

Question

Write an expression representing the given quantity.

The quantity of pollutant remaining in a lake if it is removed at  a year for  years.

Let  represent the initial quantity of pollutant in the lake. Enter the exact answer.

Answer 1

The way this planet is; there will be no difference at -2%/yr.

Anyway 100%-2%*6=88%.

Answer 2

p₆ = p₀(0.98)⁵

p₆ = 0.903920796p₀