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Question

An oil spill on a lake assumes a circular shape with an expanding radius r given by r=√t+2 , where t is the number of minutes after measurements are started and r is measured in meters. Find a formula that gives the area A of the circular region at any time t.

a. A=π(√t+2)² |sq.m.
b. A=π(√t+2)  |sq.m.
c. A=π(√t+2²) |sq.m.
d. A = π/(√t+2)²| sq.m.

Answer 1

Area = πr²

A = π(√t + 2)²

 

a.