A painter rented a wallpaper steamer at 9 a. m. and returned it at 4 p. m. He paid a total of $28.84. What was the rental cost per hour?

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$4.12 per hour

Step-by-step explanation:

So, 9am to 4pm is 7 hours

Why? Because you go from 10am, 11am, 12pm, 1pm, 2pm, 3pm, and 4pm.

So now all we have to do is to divide the amount he paid by the number of hours.

Like this:

Therefore,

The rental cost per hour is $4.12

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step-by-step explanation:

given perimeter: 28cm

length: 9cm

atp,

2(l+w)=p of the reactangle

2(9+x)=28

18+2x=28

2x=28-18

x=10/2

x=5

therefore width is 5 cm