D. 133*1.285=171 pennies in the jar
Negative exponents work like this:

So, in order to evaluate a negative exponent, you simply have to invert the base, and then raise to the positive equivalent of the exponent.
As an example, here are the first three exercises:



You can work out the rest applying this logic.
20+35+30= 1 hr&25 min so she should leave at 5:20
1.2% x 12 months (1 year) = 14.4%