What is 5 times 10 to the sixth power times 5 times 10 to the seventh power in scientific notation

This is the number of parts out of 100, the numerator of a fraction where the denominator is 100. submit

One integer is 8 times another. if the product is 72, then find the integers

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?