Question

An investigator finds a hair and silk fiber at a crime scene. Back on the lab , all evidence is logged and weighed. The hair weights 5 * 10^-5 g and the fiber weights 2.2 * 10^-4 g. How much does the fiber weight than the hair?

Answer 1

Hair 5 * 10^-5 g ........ fiber weighs 2.2 * 10^-4 g

I think you mean: "How much MORE does the fiber weigh than the hair?"

Fiber 22 * 10^-5g Hair 5 * 10^-5g

22 - 5 = 17 So, the fiber weighs

17 * 10^-5g more or 1.5 * 10^-4 g more