Find the length of the curve.y = ln(ex - 1) - ln(ex + 1) from x = ln 6 to x = ln 7
A. ln 
B. ln 
C. ln 
D. ln 
Answer: C
Mathematics
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Find curl F.F(x, y, z) = 2xyzi + 8yzj + 5zk
A. -8y + 2xy - 2xz B. 2yzi + 8zj + 5k C. -8yi + 2xyj + -2xzk D. 2yz + 8z + 5
Mathematics
Use a sum or difference identity to find the exact value.sin 185° cos 65° - cos 185° sin 65°
A. - 
B. - 
C. 
D. - 
Mathematics
Find the function value. If the result is irrational, round your answer to the nearest thousandth.Let f(x) = 2x. Find f(3)
A. 6 B. 9 C. 16 D. 8
Mathematics
Provide an appropriate response.The probability distribution for the random variable X is: 
What is the expected value of X?
A. 0.62 B. 0.26 C. 0.22 D. 0.50
Mathematics