Find the standard equation of a parabola with the given focus or directrix. Assume that the vertex is at the origin.Directrix y = -8
A. y2 = 32x
B. x2 = -8y
C. x2 = 32y
D. x = 32y2
Answer: C
Mathematics
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The problem tells by what factor and direction the graph of the given function is to be stretched or compressed. Give an equation for the stretched or compressed graph.y = x2 + 4
stretched horizontally by a factor of 2
A. y = 4x2 + 4
B. y = 2x2 + 8
C. y = 
+ 4
D. y = 
+ 4
Mathematics
Simplify.2log2 x
A. x
B. 
C. -x
D. 2x
Mathematics
A formula is given along with the values of all but one of the variables in the formula. Find the value of the variable not given.I = prt; I = 8.4, p = 210, r = 0.01
A. 0.1764 B. 0.4 C. 17.64 D. 4
Mathematics
Solve the problem.A stock increased in value by 141%. Write this percent as a simplified mixed number.
A. 1
B. 1
C. 2
D. 1
Mathematics