PLEASE ANSWER QUICKLY- surface area of the figure

5,600 x 10^3 = a) 560 b) 5,000,600 c) 5,600,000 d) 56,000

An architect is designing a water fountain for a park she uses the given function to model the water jet flowing from the fountain nozzles where h(x) gives the height of the water jugs in feet x feet from the starting point h(x)=-1/20x+x+15

Which expression is the factorization of x^2+10+21