Question

A 4500 square foot roll of plastic wrap costs $23.95. If 120 square feet is need for a party game, what is the monetary value of that 120 square foot piece of plastic wrap?

Answer 1

For this case, the first thing to do is define a variable.

We have then:

• x: the monetary value of that 120 square foot piece of plastic wrap

We write now the proportion that models the problem.

We have then:

$\frac {23.95} {4500} = \frac {x} {120}$

From here, we clear the value of x.

We have then:

$x = 120 (\frac {23.95} {4500})$

Calculating we have:

$x = 0,639$

Answer:

the monetary value of that 120 square foot piece of plastic wrap is:

$x = 0,639$

Answer 2

Answer:

$0.638

Step-by-step explanation:

Let x be the value we want to find

4500 square foot cost $23.95

120 square foot cost x

Now, cross multiply

4500 = 23.95

120 = x

4500x = 23.95 * 120

4500x = 2874

x = 2874/4500

x = 0.638

Therefore, monetray value of 120 square foot is $0.638