Answer:
it also increases
Step-by-step explanation:
A=pR^2-2pr^2, since R=15 and r=7.5
A=225p-112.5p
A=112.5p
A≈353.25 ft^2
2 2/5 servings of cake
www.mathpapa.com algebra calculator, it is good
-13/24 because u have to multiply to get the same denominator which would end up being -15/24 and 2/24 add that to get -13/24