Domain: xER\{-5,7} I’m pretty sure
90,000. In 89,891, the 8 farthest to the left is in the place you want to round, and the 9 right next to it tells you the 8 needs to round up
I=(p)(r)(t)
I=(525)(.12)(1)
I=63
You have to add the $500 and the $25 first
The t will always be in years
Sarah purchased 2 first class tickets, and 5 coach tickets. This is the answer because $2640- $1020-$1020=$600, and $600÷5=$120.