Use the Pythagorean Theorem to find the unknown length. Give the exact answer in simplified form. Then give an approximate answer rounded to two decimal places when necessary.
A. x = 10; x ? 3.16
B. x = 277; x ? 16.64
C. x = 115; x ? 10.72
D. x = 19; x ? 4.36
Answer: C
Mathematics
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where distances are in miles. If the horizontal velocity is given by 
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Find (f ?g)(x) for the given functions f(x) and g(x).f(x) = 5x - 7 and g(x) = 6x - 4
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