2x^2 - 3x - 15 = 5 using quadratic equation

x= 4, 2.5(or 5/2)

Step-by-step explanation:

2x²-3x-15=5

           -5   -5

2x²-3x-20=0

plug into quadratic equation

(3+13)/4           (3-13)/4

16/4=4             10/4=2.5

80π/3 or about 83.775

step-by-step explanation:

since a cone is 1/3 of a cylinder, we need to find the base's area. since area = πr^2, we get 16π. then, multiplying this by 5, we get 80π. dividing by 3, since the cone's volume is 1/3 of that of a cylinder's, we get 80π/3.

hope this !

answer: a.

step-by-step explanation: the answer is a. because, you need to converge the fractions to find a solution.