SOLUTION: The head of a circular drum has an area of 9x^2pi +12xpi+4pi. a) What is the radius of the drum in terms of x? b) If x=9, what is the radius length?

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: The head of a circular drum has an area of 9x^2pi +12xpi+4pi. a) What is the radius of the drum in terms of x? b) If x=9, what is the radius length?       Log On


   

Question 1061310: The head of a circular drum has an area of 9x^2pi +12xpi+4pi.
a) What is the radius of the drum in terms of x?

b) If x=9, what is the radius length?


Answer by ikleyn(52798) About Me  (Show Source):
You can put this solution on YOUR website!
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The head of a circular drum has an area of 9x^2pi +12xpi+4pi.
a) What is the radius of the drum in terms of x?

b) If x=9, what is the radius length?
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The radius is sqrt%289x%5E2%2B12x+%2B4%29 = sqrt%28%283x%2B2%29%5E2%29 = |3x+2|.


If x= 9, then the radius is 3*9+2 = 27+2 = 29 units.