Which equation matches the given calculator-generated graph and description? Decide without using your calculator.
Parabola; opens left
A. y = -x2
B. x = y2
C. y = x2
D. x = -y2
Answer: D
Mathematics
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Find the vector projv u.v = 2i - 2j - 4k, u = 5i - 12k
A. 
i - 
j - 
k
B. 
i - 
k
C. 
i - 
k
D. 
i - 
j - 
k
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Solve the problem.Consider the region R bounded by the graph of f(x) = 
on the interval [0, 3]. Find the volume of the solid formed when R is revolved about the y-axis.
A. ?
B. 2?
C. ?
D. 2?
Mathematics
Use the LCD to clear fractions and solve the given equation.
= 
+ 
A. - 
B. 0
C. - 
D. - 
Mathematics
Find the exact value without using a calculator. tan 
A. -1
B. 
C. 
D. 1
Mathematics