When baking a cake, you have a choice of the following pans:

Question

a round cake pan that is 2 inches deep and has a 7 inch diameter
a 6 inch × 9 inch rectangular cake pan that is 2 inches deep
a. Which of these pans has the larger volume? Justify your answer.
b. Excluding the bottom of the cake, what is the surface area of each cake that will be covered by
frosting? Justify your answer.
I just need help with b

Steve answered: volumes are
round: πr^2h = π*(7/2)^2*2 = 98π/4 = 76.969 in^3
parallelopiped: LWH = 6*9*2 = 108 in^3

should be easy to tell now, eh?

areas are
round: πr^2 + 2πrh = πr(r+2h)
brick: LW+2LH+2WH = LW+2H(L+W)

Now plug in your numbers and compare

Then I asked: So...
Area for round pan: 3.14*3.5*2+2*3.14*3.5*3.5=98.91
and...
Area for rectangular pan:
9*6+2*9*2+2*6*2=114
Am I right if not help me with b

Steve answered: no, you used 5*2=10 instead of 5^2=25 for the round area.

Then I asked: am I right now?
Area for round pan: 3.14*3.5^2+2*3.14*3.5*3.5=115.395
Area for rectangular pan:
9*6+2*9*2+2*6*2=114

Answer 1

nevermind I think I got it

Answer 2

Plagiarism is a violation of the honor code. Do your own work!

Answer 3

Jeez Cazzo. You show up everywhere. Go harass someone who actually cares. I mean we`re only checking our answers.

Answer 4

@ Mrs. Verlarde I looked at your account, and all you do is post that same thing on every math thing you see. Come on! Seriously?