7.) 4x greater because 8*8=64 and 4*4=16 64/16=4
8.) 22 because 70-13-13=44/2=22
9.) 32 because the square root of 64 is 8 so each side is 8 square feet
10.) The rectangle is an 8 by 5 and the perimeter is 26
Try this solution, note, the shown way is not the shortest one.
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THE FIRST ONE AND THE LAST ONE
The answer is -6 if u suntract the numbers you can see.
A 1:12 is the answer for this question