Solve this problem using estimation.
the cimarron middle school orchestra sold $8720.00 worth of candy bars in 28 days. about how much did they make each day?

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?