Answer:
Depends on which answer they give you to answer. If you have the one I have which is *IRA contribution* then go for it!
It is tree times more value or 15 not sure
Answer is C. 52 hours. because you divide the amount her earned with the $24 that he gets each hour
The answer is 95%
This is something you should memorize. Specifically it is from the Empirical Rule (or 68-95-99.7 rule) which gives rough approximations of areas under the curve.