A rectangle is placed under the parabolic arch given byf(x) = 27 –
3x2 by using a point (x, y) on the parabola, as shown in the figure.
Write a formula for the function A(x) that gives the area of the
rectangle as a function of the x-coordinate of the point chosen.
a. f(x) = 6(27 – 3x2)
b . f(x) = 27x – 3x3
c .f(x) = 54x – 6x3
d . f(x) = 162x – 6x3
Algebra is my weakness. Please help.