For #11 you add 54 + 59+ 57+ 54. Then you have 224. Then divide 224 by 4 since there are 4 numbers. Your answer should be 56 inches as the average, or mean.
Remember, when you divide, you divide by the number of all the numbers. I'm trying to make sense but hope this helps!
Calculate circumference. You can do the math mentally with area & perimeter,but circumference is much more complex
16 because two negatives numbers equal a possitive so 16
I think c. 10100÷ (12 x 4)
