PLEASE HELP ASAP 100 PTS can u also find the value of y. the options for the y questions are square root of 55
6
16
8 sqrt 3

Need on this geometry question. explain how you did it.

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?

What is the total surface area of this square pyramid?