What is the answer for a

Find the roots of the polynomial function f(x) = x^3 + 2x^2 + x

What is the volume of the cone to the nearest cubic millimeter? (use π  = 3.14) a) 46 mm3 b) 128 mm3 c) 183 mm3 d) 275 mm3 diameter = 5 mm height = 7 mm how do you do this problem step by step?

See attachment below and find the equivalent of tan(∠qsr)