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Let a, b and c be positive numbers satisfying ab = 11.25, ac = 20, and bc = 36. What is the value of c?

 May 22, 2020
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ab/ac * bc = b^2

 =  11.25/20  *  36 = b^2       b = 4.5

 

4.5 *c = 36      c = 8                   a = 2.5         

 
 May 22, 2020

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