What is -4.5 as a mixed number

Find the value of tan theta if sin theta = 12/13 and theta is in quadrant 2

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

Evaluate the expression for the given value of the variable 2×(c2-5) for c=4