The atomic mass is important because? a. it tells you the size of the atom b. it tells you the charge of the atom c. it tells you the number of electrons

before we can answer, we have to see the choices that are printed there with the question.   that's the only way we can point you to the correct one.

with 5 seconds, no, but over time if the police car stays at 65m/s ad the speeding car stays at 60, then obviously yes, but the answer to your question would be, no.

hope this : )