With this, i don't know question 14

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?

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels

Linda loans her friend $250 with a 5% monthly intrest rate. how much was the whole loan?