A=8^2
A=64ft^2
A square is defined as a 4 sided shape with all equal sides, so all 4 sides should be 8 feet.
The answer is d because if you multiply-5x2 and then subtract 1 you get -11
8. To find the answer you can eather multipy it for each of the sides or you can add it 6 times once for each side

9. You basicly do the same thing as the previous problem but with the new numbers and you add each number 2 times
10. For are you multiply Base × Height So all you have to do is Multiply the 2 numbers shown together

11-12 Is the same but witb the new numbers
I hope this helps!
Answer:
15 years
Step-by-step explanation:
subtract 30000 from 36000 to get 6000, then subtract 2000 from 2400, you get 400, then divide 6000 by 400