So for this one all you have to do is find the average. Simply do 25 divided by 2 to get 12.5 miles per hour.
21258/9 =2362, so the answer would be 2
It would be a. because a rectangle has 2 pairs of congruent sides so since the width is 12 and there are 2 sides with that measurement it would be 2(12) and the same goes for the length, and then you add them together.
2×5^{2} if you don't understand its 2 times 5 to the second power.