Simplify the expression. If the expression cannot be simplified, so state.-9y - 7y2
A. -16y
B. -16y2
C. -2y
D. cannot be simplified
Answer: D
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Find the unit tangent vector of the given curve.r(t) = (10 + 10t7)i + (3 + 11t7)j + (9 + 2t7)k
A. T = 10i + 11j + 2k
B. T = 
i + 
j + 
k
C. T = 
i + 
j + 
k
D. T = 
i + 
j + 
k
Solve the problem.Suzie bought a pound of butter for 
and a gallon of milk for 
What was her total bill?
A. $3.60 B. $4.50 C. $3.50 D. $4.60
Suppose the probability that a certain drug will lower cholesterol significantly is 0.85. If the drug is administered to 1300 patients, what is the probability that more than 1094 will have significantly lowered cholesterol levels? Round your answer to four decimal places. ?
A. 0.2073 B. 0.7894 C. 0.6828 D. 0.7550 E. 0.7927
Find the derivative of the following function.
?
?
A. 
B. 
C. 
D. 
E. 