A rectangular floor of area 21.6 m2 is going to be tiled. Each tile is rectangular, and has an area of 576 cm2. An exact number of tiles can be put into the space. How many tiles will be needed?

375

Step-by-step explanation:

You want to find a number n which fulfills

21.6 m2 = n * 576 cm2.

Be careful! The units are different on the left and right side of the equation.

If we change to m2 on the right side, than that means we have to divide by 10.000 becaus 1 m2 is equivalent to 10000 cm2.

(1 m2 = 1 m * 1 m = 100 cm * 100 cm = 10000 cm2)

That gives us

21.6 m2 = n * 0.0576 m2

Now divide both sides of the equation by 0.0576 m2 and we get

= n

375 = n

i think you would have to divide the money he had saved, which is $2,000 by the time he plans on exercising which is 40 hours, and the answer you get should tell you the answer to your question.