Find the standard form of the equation of the parabola with the given characteristic and vertex at the origin.
directrix: x=-5
?
A. y2 = 20x
B. y2 = -5x
C. x2 = -20y
D. x2 = -5y
E. x2 = 20y
Answer: A
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Find the absolute maxima and minima of the function on the given domain.
on the square 
A. Absolute maximum: 108 at 
and 
absolute minimum: 36 at 
and 
B. Absolute maximum: 36 at 
and 
absolute minimum: 27 at 
and 
C. Absolute maximum: 108 at 
and 
absolute minimum: 0 at 
D. Absolute maximum: 36 at 
and 
absolute minimum: 0 at 
Solve the problem.The number of books in a small library increases according to the function 
where t is measured in years. How many books will the library have after 2 years?
A. 21,414 B. 10,278 C. 9300 D. 11,708
Use a proportion to solve the problem.A quality-control inspector examined 210 calculators and found 11 of them to be defective. At this rate, how many defective calculators will there be in a batch of 15,960 calculators?
A. 76 calculators B. 2310 calculators C. 7 calculators D. 836 calculators
Simplify. Assume x can represent any real number.
A. -16x - 4
B. 
C. 16x + 4
D. -