Answer:
20
Step-by-step explanation:
Alright well for (A) you will round $5280 to $5300. Then you multiply $5300 by 28.
For (B) you just round up. So again $5280 rounds up to $5300.
Find the interior angle of the Pentagon first then use the rule : Interior angles add up to equal 180. Use your answer from that to find out what x is.