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The functions f and g are defined for all the positive integers n by the following rule:

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The functions f and g are defined for all the positive integers n by the following rule: f(n) is the number of positive perfect squares less than n and g(n) is the number of primes numbers less than n. If f(x)+g(x)=16, then x is in the range:

A.. 30<x<36

B. 30<x<37

C. 31<x<37

D. 31<x<38

E. 32<x<38

Official Answer
1Comments
Any explantions?
commented Jun 28, 2015 by Beginner (3 points)

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