Simplify the expression. (6k^3)^3 6k^6 216k^6 216k^9 6k^27

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?

Aconstruction worker has rope 9 m long he needs to cut it in pieces that are each 3 /5 m long how many such pieces can he cut without having any rope leftover?

Olga bought a new skirt that cost $20. sales tax is 5%. how much did olga pay, including sales tax? 7.