Find two numbers that have the given product and the given sum 12,8

Which inequality statement describes the two numbers on a number line? "? 7 and a number 5 units to the right of ? 7"

Write as a product: ac^2–ad+c^3–cd–bc^2+bd

Suppose a laboratory has a 30 g sample of polonium-210. the half-life of polonium-210 is about 138 days how many half-lives of polonium-210 occur in 1104 days? how much polonium is in the sample 1104 days later? 9; 0.06 g 8; 0.12 g 8; 2,070 g