Homework 4 P 11SolutionWe know that the area A of a circle

Homework 4 P 11

Solution

We know that the area ( A) of a circle with radius r is given by A = r². Since r = 6t - 0.3 t² , we have A = ( 6t - 0.3 t² )² or, A =   ( 0.09 t⁴ - 3.6 t³ + 36 t²) [as ( a - b) ² = a² - 2ab + b² ]