Four students estimated the width of the door to their classroom. who made the best estimated.

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?

Witch represents the inverse of the function f(x)=1/4x-12

4. a single woman uses an online cash flow calculator which reveals a cash flow of 203. what does this mean?