Question

Forty ounces of Lazy Lawn fertilizer covers 1,250 square feet of lawn.(a)How many ounces would be required to cover a 9,000 square foot lawn? ounces(b)If Lazy Lawn costs $1.11 for a 36 ounce bag, what is the total cost (in dollars) to fertilize the lawn?$

Answer 1

(a) Given that 40 ounces of Lazy Lawn fertilizer cover 1,250 square feet of lawn, let be "x" the number of ounces that would be required to cover a 9,000 square foot law.

You can set up the following proportion:

`(40)/(1250)=(x)/(9000)`

Now you need to solve for "x", in order to find its value:

`(9000)((40)/(1250))=x`
`x=288`

(b) You know that Lazy Lawn costs $1.11 for a 36-ounce bag.

Let be "c" the total cost (in dollars) to fertilize the 9,000 square-foot lawn.

Knowing that 288 ounces are required to cover that lawn, you can set up this proportion:

`(1.11)/(36)=(c)/(288)`

Solving for "c", you get:

`(288)((1.11)/(36))=c`
`c=8.88`

Hence, the answers are:

(a)

`288\text{ }ounces`

(b)

`\text{ \$}8.88`