Answer:
A. Wezi will get fifteen (15) $20-bills.
B. There will be $15 left.
Explanation:
A. We have been given that Wezi has sixty-three $5 bills.
Let us find the total amount of money that Wezi has by multiplying 63 by 5.


Therefore, Wezi has $315.
Since Wezi wants to exchange her total money of $5 bills with $20 bills, so let us divide total amount of money by 20.

Since we cannot 0.75 of a $20 bill, so Wezi will get 15 $20-bills.
We can see that 315 is not completely divisible by 20, so let us subtract greatest multiple of 20 from 315.
We can see
, so upon subtracting 300 from 315 we will get,

Therefore, there will be $15 left.