What is the radius of a tank that holds 785 cubic feet of oil and is 10 feet tall

The answer to your question is r = 5 ft

Step-by-step explanation:

Data

Volume = V = 785 ft³

height = h = 10 ft

radius = r = ?

pi = 3.14

Formula

Volume of a cylinder = πr²h

-Substitution

         785 = (3.14)r²(10)

-Solve for r²

         r² = 785 / (3.14)(10)

-Simplification

         r² = 785 / 31.4

         r² = 25

-Result

         r = 5 ft

f(x) = x^3 -2x^2 -3x

x( x^2 -2x-3)

x( x^2 +x -3x -3)

x( x(x+1) -3(x+1))

x( x-3)( x+1)

so zeroes are 0, 3,-1

its (2) option