Plz hellpp!
What is the greatest number of planes determined by four noncollinear points?

What is the inverse of the function f(x)=2x+1

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?

Is the power produced directly proportional to the wind speed, give reasons for your answer?