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miss Akunina [59]
3 years ago
6

How do I solve these? Did I get the first one wrong?

Mathematics
1 answer:
Serhud [2]3 years ago
5 0

For the first one:

s = 2*pi*r*h

Solve for r like this:

s = 2*pi*r*h

r = s/2*pi*h , that is the last answer that is given as a choice, and it's correct.

For the second one:

c = 8*pi*a*b

Solve for a like this:

c = 8*pi*a*b

a = c/8*pi*b, that is the first answer that is given as a choice, and it's correct.

Basically, you need to divide both sides with everything that is next to the variable you are asked to be solved with.

Hope this helps!

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