Please help me this is for a grade

Thomas hiked 6 miles on monday 10 miles on tuesday and 8 miles on wednesday. what is the mean value closesst to the mean number of miles over the tree day period?

If you can solve all of these i will give ! - 4% of 190 - 4% of 162.5 - 4% of 140 - a 4% increase from 155.1 - a 4% increase from 159.8

Aramp rises 4 feet over a distance of 10 feet. what is the length of the ramp?