Find an equation for the ellipse.Focus at (0, -4); vertices at (0, ±8)
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Answer: C
Mathematics
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Solve.The roof of a building is in the shape of the hyperbola 
where x and y are in meters. Refer to the figure and determine the height, h, of the outside walls. Round to one decimal place if necessary.A = 3 m
A. 47 m B. 3.5 m C. 12 m D. 6.9 m
Mathematics
Solve.For the geometric sequence 64, 16, 4, 1, ... , find an.
A. an = 
n-4
B. an = 4n
C. an = 
n
D. an = 4n-4
Mathematics
Simplify.
A. 
B. 
C. 
D. 
Mathematics
Write the rate as a unit rate.A concert tour grossed $160,000 for 10 shows.
A. $1600/concert B. $8000/concert C. $16,000/concert D. $160,000/10 concerts
Mathematics