Which of the following are square roots of the number below? check all that apply.

400

a. 400 1/2

b. -400 1/2

c. 10

d. 20

e. 40

f. -20

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.

I’m not sure about that