This question has stumped me:
09C-46: A Mickey Mouse balloon has a surface area of 37 in^2 after # into it 9 times. What will the surface area be after 14 more #?
This was my approach:
If you # into a balloon, then you are adding more air into the balloon thus increasing the VOLUME...so I said: [unparseable or potentially dangerous latex formula]
Where n is the number of #, V is the volume, and A is the surface area. I solved for the surface area for 14 # and got 350.
However the answer is 69.2