Todd is a seller. I have sold a gold ring for $ 78 and earned 10% commission. How much commission did he earn?

Compare the subtraction problems 6/8 - 5/8 = 1/8 and 6/9 - 7/9 = 1/9 why is the answer to the first problem positive and the answer to the second problem negative

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .

You're locked out of your house. the only open window is on the second floor, 25 feet above the ground. there are bushes along the edge of the house, so you will need to place the ladder 10 feet from the house. what length ladder do you need to reach the window?