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anonymous

  • one year ago

Can someone please check my work?

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  1. anonymous
    • one year ago
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    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.

  2. anonymous
    • one year ago
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    I created this Expression: 3.14(23+2^2)

  3. anonymous
    • one year ago
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    and i solved for the answer and got 84.78

  4. anonymous
    • one year ago
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    @Michele_Laino

  5. anonymous
    • one year ago
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    @phi

  6. phi
    • one year ago
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    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

  7. anonymous
    • one year ago
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    i thought that at first but i thought i was wrong

  8. anonymous
    • one year ago
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    3.14(2*3+2^2)

  9. phi
    • one year ago
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    yes, much better

  10. anonymous
    • one year ago
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    ok now ill have to do my calculation again one sec ok

  11. anonymous
    • one year ago
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    So now the answer is 31.4 correct?

  12. phi
    • one year ago
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    yes

  13. anonymous
    • one year ago
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    Thank you @phi (:

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spraguer (Moderator)
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