The answer is A. 88.8 cm2
Work:
74 x 2 = 148
14.8 = 29.6
Add them = 177.6
then
117 miles in 2.25 hours
Divide both numbers by 2.25
52 miles per hour
I hope this is what you are looking for!
To find the average amount, you must add all of the pieces, let's say you get 3/8. and there is 4 pieces. the average amount would be 3/4. So I this question the average amount of salt would be 9/14 of salt.