Can someone give me one example of a rational number and state why it is rational. then give an example of an irrational numbers and state why it is a irrational.

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?

If private savings 'v' = 0.75s and total savings 's' equals $4.20 billion, solve for public and private savings.

21 type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar. the solution set of n2 - 14n = -45 is { (separate the solutions with a comma)