Define the parabola equation when the vertex is the same center point of a circle x^2+y^2+4x-6y-12=0 with y=8 is the diectrix of its. a)x^2-4x+20y-56=0 b)x^2+4x-20y+56=0 c)x^2+4x+20y-56=0 d)x^2+4x-20y-56=0

Simplify the expression and find the missing terms. the simplest form of has in the numerator and in the denominator.

Evaluate the expression for the given value of the variable 7a - 4a for a =8

The two cylinders are similar. if the ratio of their surface areas is 9/1.44 find the volume of each cylinder. round your answer to the nearest hundredth. a. small cylinder: 152.00 m3 large cylinder: 950.02 m3 b. small cylinder: 972.14 m3 large cylinder: 12,924.24 m3 c. small cylinder: 851.22 m3 large cylinder: 13,300.25 m3 d. small cylinder: 682.95 m3 large cylinder: 13,539.68 m3