While in science class a student measured a cube. She measured the mass of the cube using a triple beam balance it
was 21g. She also measured the volume of the sides using a
ruler
. The volume of the cube was 7cm3. What is the density of
her cube?

Harry lives in a city, and he has a lung condition known as asthma. on certain days, harry has to stay inside because pollutants in the air make it difficult for him to breathe. which of these pollution sources are nonpoint sources that might bother harry if he goes outside? choose the two that apply.