Answer for the first one is just 7/9, 28/36
Second one is 9/14, 3/4
For the third one you multiply 12.50 by 5 which gives you 62.5
THE ANSWER IS THAT A= 1.25
$67.82 if you pay it on time.
$90.43 if you pay it late.
2912 is the population . when 12% is increase of the Ann's population
