Cross-sectional area of a beam is , where represents the length in feet of half the base of the beam.

(a)

Find the cross-sectional area of the beam if the length of half the base of the beam is one-third of a foot.

The function is .

Length of half the base of the beam is one-third of a foot means, substitute in the given function.

The cross-sectional area of the beam if the length of half the base of the beam is one-third of a foot is around square feet.

(b)

Find the cross-sectional area of the beam if the length of half the base of the beam is one-half of a foot.

The function is .

Length of half the base of the beam is one-half of a foot means, substitute in the given function.

The cross-sectional area of the beam if the length of half the base of the beam is one-half of a foot is around square feet.

(c)

Find the cross-sectional area of the beam if the length of half the base of the beam is two-thirds of a foot.

The function is .

Length of half the base of the beam is two-thirds of a foot means, substitute in the given function.

The cross-sectional area of the beam if the length of half the base of the beam is two-thirds of a foot is around square feet.

(a) The cross-sectional area of the beam if the length of half the base of the beam is one-third of a foot is around square feet.

(b) The cross-sectional area of the beam if the length of half the base of the beam is one-half of a foot is around square feet.

(c) The cross-sectional area of the beam if the length of half the base of the beam is two-thirds of a foot is around square feet.