anonymous
  • anonymous
Can someone please check my work?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
The surface area of a cone with radius r units and slant height s units is shown below: Surface area = 3.14(rs + r2) Part A: If r = 2 units and s = 3 units, write an expression that can be used to calculate the surface area of the cone. Part B: What is the surface area of the cone? Show your work.
anonymous
  • anonymous
I created this Expression: 3.14(23+2^2)
anonymous
  • anonymous
and i solved for the answer and got 84.78

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anonymous
  • anonymous
@Michele_Laino
anonymous
  • anonymous
@phi
phi
  • phi
almost. in algebra, rs means r*s (we don't bother to put in the multiply sign... we assume it is there) but when you put in numbers, you have to put in the multiply sign because 2*3 is different from 23
anonymous
  • anonymous
i thought that at first but i thought i was wrong
anonymous
  • anonymous
3.14(2*3+2^2)
phi
  • phi
yes, much better
anonymous
  • anonymous
ok now ill have to do my calculation again one sec ok
anonymous
  • anonymous
So now the answer is 31.4 correct?
phi
  • phi
yes
anonymous
  • anonymous
Thank you @phi (:

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