Find the standard equation of a parabola with the given focus or directrix. Assume that the vertex is at the origin.Directrix y = - 
A. x2 = 12y
B. y2 = 12x
C. x2 = 3y
D. y2 = 3x
Answer: C
Mathematics
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Solve the problem.A spreadsheet contains 550 entries in a rectangular array which has 25 rows. How many entries are in each row?
A. 13,750 entries B. 525 entries C. 32 entries D. 22 entries
Mathematics
Establish the identity.tan(? - ?) = tan ?
What will be an ideal response?
Mathematics
Use a graphing calculator to solve the equation. Round your answer to two decimal places.ex - ln x = 4
A. {2.17} B. {1.48} C. {0.57} D. {1.27}
Mathematics
The following figure shows the graph of revenue function
and cost function
. What is the relationship between marginal cost and marginal revenue when profit is at its maximum value?
A. 
<> 
B. 
< 
C. 
D. 
> 
E. no relationship exists
Mathematics