Consider A = f(r) area of circle with radius r and r = h(t) be radius of circle at time t. Which of the given statements correctly gives the practical interpretation of composite function f(h(t))? Chooses all that apply if more than one is suitable.
i. Length of radius of circle with area A = f(r) at time t .
ii. Length of radius at time t .
iii. area of a circle which at time t has radius h(t) .
iv. At what time t the radius will be r = h(t) .
v. At what time t area will be A = f(r) .
vi. Area of circle at time t .
vii. None of the above