Find the unit tangent vector of the given curve.r(t) = (1 + 10t2)i + (3 + 11t2)j + (3 + 2t2)k
A. T = 
i + 
j + 
k
B. T = 10i + 11j + 2k
C. T = 
i + 
j + 
k
D. T = 
i + 
j + 
k
Answer: A
Mathematics
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Find the extreme values of the function and where they occur.y = 
A. The minimum is 1 at x = 0. B. The maximum is 1 at x = 2. C. The maximum is 1 at x = -2. D. The minimum is 0 at x = 1.
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Simplify the expression. 
A. 
B. - 
C. 
D. - 
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Add.8060
A. 230 B. 241 C. 231 D. 220
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Find the partial derivative.Find fy(2, 9) when f(x, y) = yexy. Leave your answer in terms of e.
A. 9e18 + 18 e18 B. e18 + 9 e18 C. e18 + 18 e18 D. 18 e18
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