Carly goes 50 miles per hour and it takes her 2.2 hours but on the way home she hits traffic and can only go 40 miles per hour. how long does it take her to get home?

isaiah walks 3 miles due north, turns and then 5 miles due east. how far is he from his starting point?

a^2 + b^2 = c^2

let c = distance from starting point.

(3)^2 + (5)^2 = c^2

9 + 25 = c^2

34 = c^2

sqrt{34} = sqrt{c^2}

sqrt{34} = c