Question

approximate the volume of the backpack that is 17in × 12 in × 4in if you need a picture I'll try to send it to help

Answer 1

The formula for volume would make the equation 17" x 12" x 4", which would make it 816 cubic inches. 

Answer 2

To find volume you multiply all three dimensions by one another. We can approximate this by multiplying the smaller ones first.

12*4=48 Now multiply 48 by 10.

48*10=480 We still have 7 to deal with, so we can multiply 48 by 2 and then by 5.

48*5=240
48*2=96

Now add the three together.

480+240+96=816.

Your answer is 816.