The answer is 304.8 millimetres
So, values of x are: 
Step-by-step explanation:
We need to find the square root of 5x^2 = 300
Writing in mathematical form:

Divide both sides by 5


Taking square root on both sides






So, values of x are: 
Keywords: Square root
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The answer to this question is B. 105
The average cost in 1990 is <span>$12,841.</span>