Find the unit vector in the same direction as the given vector.v = 3i + j
A. u = 
i + 
j
B. u = 
i + 
j
C. u = 
i + 
j
D. u = 3
i + 
j
Answer: B
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Solve the problem.Find parametric equations for the normal line to the surface 
at the point 
A. 
B. 
C. 
D. 
Solve the problem.The cost of a rental car for the weekend is given by the function C(x) = 146 + 0.25x, where x is the number of miles driven. Find the slope of the graph of this function and interpret it as a rate of change.
A. 146; The cost of the rental car decreases by $0.25 for each mile driven. B. 146; The cost of the rental car increases by $146 for each mile driven. C. 0.25; The cost of the rental car increases by $0.25 for each mile driven. D. 0.25; The cost of the rental car decreases by $0.25 for each mile driven.
Let x be a continuous random variable with a standard normal distribution. Find the requested probability.P(-2.34 ? x ? -1.1)
A. 0.1263 B. 0.6261 C. 0.1249 D. 0.1261
Write the expression in lowest terms.
A. 
B. 
C. 
D. 