Answer: The answer is 80 mph.
Step-by-step explanation: 1. Divide 14 from 571.
2. You'll get the answer 40. So it's 40 mph.
3. If she's trying to shorten by 1/2 then she should drive 80 mph because if you drive 80 mph it will take 7 hours instead of 14 hours. (She'll go 7 hours because you divide 14 hours by 2. Then you have to multiply 2 to 40.)
Well, you have to find the length and width of the rectangle. Since the area is 24, find factors that multiply to 24. Then to find perimeter, Add all the newly found sides together.
I honestly think that you can solve this yourself. However, I can help you correct your answer. I, however, will NOT blatantly give you this answer.