Question

the length of a rectangle is 9 inches. write an expression for the area of the rectangle if the width is w inches. find the area of the rectangle when the width is 1,8,9, and 11 inches.

Answer 1

let A = area of rectangle
let w = width of rectangle

area of rectangle = length * width, therefore:
A = 9w

then plug-in values for the width in the formula:
(a) if w=1, A = 9*1 = 9 sq. in
(b) if w=8, A = 9*8 = 72 sq. in
(c) if w=9, A = 9*9 = 81 sq. in
(d) if w=11, A = 9*11 = 99 sq. in

so there,, =)

Answer 2

A spherical storage tank has a diameter of 14 feet.

Approximately how many cubic feet of water will it hold