18/21 24/40 55/70 simplest form pls: )

Volume of a cylinder with a radius of 13 in and height of 30 in

What is the point-slope equation of a line with slope -5 that contains the point (6,3)

Write a polynomial function f of least degree that has rational coefficients, a leading coefficient of 1, and the given zeros. 3, 4+2i, 1+(sqrt)7 the answer is supposed to be: f(x)=x(^5)-13x(^4)+60x(^3)-82x(^2)-144x+360 what am i doing wrong?