Chapter 11.6, Problem 41STP

(a)

To determine

To list: the steps Mrs. W’s needs to follow.

Explanation of Solution

Given information:

Mrs. W’s wants to fertilize her lawn for spring. The fertilizer that she wants to buy indicates one bag will fertilize 1000 square feet.

Calculation:

Mrs. W should know the area of the lawn. To know the number of bag required she will divide the area of the lawn by 1000 square feet.

(b)

To determine

To calculate: the number of bags of fertilizer she will need.

Answer to Problem 41STP

She will need is $13.5$ bags.

Explanation of Solution

Given information:

Suppose Mrs. W’s lawn measures 90 feet by 150 feet.

Calculation:

Consider the lawn measures 90 ft by 150 ft.

The objective is to find the number of bags of fertilizer she will need.

The area $A$ of a rectangle is given by the formula

  $A=l\cdot w$ where $l$ is the length and $w$ is the width of the rectangle.

The area $A$ of the rectangle is given by the formula

  $\begin{array}{c}A=l\cdot w\\ =150\times 90\\ =13500\end{array}$

The area of the lawn is 13500 square feet.

Therefore, the number of bag of fertizer she will nees is $\frac{13500}{1000}$ i.e. $13.5$ .