Nausicca202
Answered

25 points!!! Please help with math!

25 points!!! Please help with math! class=

Verified Answer :

charlottekrist

  1. V=pir^2h
    V=pi(5x+2)(2x+8)
    Distribute 
    (pi5xpi2)(2x+8)
    Apply the foil method (a+b)(c+d)=ac+ad+bc+bd
    10pix^2+40pix+4pix+16x
    Simplify
    10pix^2+44pix+16pi


    12. 
    S=4pir^2
    S=4pi(3x+2)^2
    Use square of sum (a+b)^2=a^2+2ab+b^2
    4pi((3x)^2+2    3x2+2^2)
    2. Use multiplication distributive property (xy)^a=x^ay^a
    4pi(3^2x^2+2    3x2+2^2)
    Simplify 3^2 to 9
    4pi(9x^2+2    3x2+2^2)
    Simplify 2^2 to 4
    4pi(9x^2+2    3x2+4)
    Simplify 2    3x*2 to 12x
    4pi(9x^2+12x+4)
    Distribute 
    36pix^2+48pix+16pi


    Have a nice day :D

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