How do you write two times one thousandths plus three times one hundred plus five times one plus two times one tenth plus seven times one thousandths I’m standard from

Can someone check my answer? you

The graph represents the gallons of water in a water tank with respect to the number of hours since it was completely filled

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?