What is the length of missing side b in the figure below?

We need to use the Pythagorean Theorem.

It states that a^2 + b^2= c^2, where a and b are the legs of the right angle triangle and c is the hypotenuse.

13 is the hypotenuse, 7 and b are the legs. 



The value of b is 2√(30).

Letter c so sorry if i’m wrong ):

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.