The angle between 2 curves at a point of intersection is the angle between their tangent lines. Find acute between y=x^2 and y=x^3

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?

Explain how you can find the missing fraction in 3 4/5 / (blank) 2 5/7. then find the missing fraction.

1: 4 if the wew 35 surfboards at the beach how many were short boards?