Find the derivative of the function and evaluate the derivative at the given x-value.f(x) = x2 + 5x at x = 4
A. f'(x) = 2x - 5; f'(4) = 3
B. f'(x) = 2x + 5; f'(4) = 13
C. f'(x) = x + 5; f'(4) = 9
D. f'(x) = 4x + 5; f'(4) = 21
Answer: B
Mathematics
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÷ 
A. 
B. 
C. 
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