If you select a random sample of 25 full-time college students, what is the probability that the mean time spent on academic activities is at least 21 hours per week?

At a constant it will take one hour to travel 32 mi.at that speed it will take 1/2 hr to travel the remaining 16 mi.it will take 1+1/2 hr to travel the 48mi @ 32mph.so 1 hr = 60 min& 1/2 hr = 30 min1+1/2 hr = 90 min.there are 60s in each 90 × 60 = 3600 seconds.the real question seriously is he why are they driving so slow? ! lol.

Ibelieve it's a. 2.2 - x = -10.85 (plz tell me if it's right : ) )