The ratio A/r² would represent

which is the circumference of a circle divided by its diameter.
You can see this because the area of a circle is

r² and if you divided that by the radius squared, you are given pi which is the circumference of a circle divided by its diameter.
Answer:
20
Step-by-step explanation:
Depending on how heavy the package is, you should take the Fed Ex if the package is heavy, and the UPS for something that is small
Answer:
$3 for seinor citizen and $4 for student
Step-by-step explanation: