How do you distribute -6(z-1)

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

Is there an x intercept in the equation 60*1.15^x

If np3 /nc2 = 6, find the value of n