Subtract the two numbers and you will get the answer
Yes he is correct, 100% would be 10 hours again, so 110% would add the extra hour to make it 11 hours
Wouldn't your answer be A because it is 40% which is 0.4 as a decimal?
The perimeter is 32 because if you add up all the sides you get 32 and 8 times 4 is 32