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xgLet A=f(r)be the area of a circle with radius r and r=h(t)be the radius of the

ID: 3034914 • Letter: X

Question

xgLet A=f(r)be the area of a circle with radius r and r=h(t)be the radius of the circle at time t.

Which of the following statements correctly provides a practical interpretation of the composite function f(h(t))? Select all that apply if more than one is appropriate.

A. At what time tt the area will be A=f(r).
B. The length of the radius at time tt.
C. The area of the circle which at time tt has radius h(t) .
D. The length of the radius of a circle with area A=f(r) at time tt.
E. At what time tt the radius will be r=h(t)
F. The area of the circle at time tt.
G. None of the above

Explanation / Answer

First we find the radius of circle at any time t, given by r=h(t), then using this r we will find the area of the circle. so basically compostie function f(h(t) finds the area of a circle at any time "t"

Option C and F is correct.