Write 42 as a sum of tens and ones?

!! 10 ! a westbound jet leaves central airport traveling 635 miles per hour. at the same time, an eastbound plane departs at 325 miles per hour. in how many hours will the planes be 1900 miles apart?

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?

15/16 as a decimal rounded to the nearest hundredth