S(r(t)) = S(t) = 4*pi*((7/9)t^2)^2 = 4*pi*(49/81)t^4 = (196/81)*pi*t^4

S(t) = (196/81)*pi*t^4

S(2) = (196/81)*pi*(2)^4 = 121.63 m^2

S(2) = 121.63 m^2

Secure Information

Content will be erased after question is completed.

Enter the email address associated with your account, and we will email you a link to reset your password.

Forgot your password?

Sign Up