Sandy ran 3 1/4 miles around the school track. Each lap is a 1/2 mile. How many laps did she run?

Abox contains 1 plain pencil and 4 pens. a second box contains 5 color pencils and 5 crayons. one item from each box is chosen at random. what is the probability that a plain pencil from the first box and a color pencil from the second box are selected? write your answer as a fraction in simplest form.

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)

Given: △acm, m∠c=90°, cp ⊥ am , ac: cm=3: 4, mp-ap=1. find am.