Jane wrote all the natural numbers from 1 to 12. including 1 and 12. how many numbers did Jane write?

Pls! does anybody know a shortcut for answering these types of questions in the future?

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?

X-10/4 when x = –18 a 7 b –2 c –7 d 2