If 7128 = 2^p * 3^q * 11^r find the value of p+q+r

How many credit hours will a student have to take for the two tuition costs to be equal? round the answer to the nearest tenth of an hour.

Aman is 6 feet 3 inches tall. the top of his shadow touches a fire hydrant that is 13 feet 6 inches away. what is the angle of elevation from the base of the fire hydrant to the top of the man's head?

Solve each quadratic equation by factoring and using the zero product property. n^2 - 49 = 0