Solve the problem.A radio telescope has a parabolic surface. If it is 9 meters deep and 
wide, how far is the focus from the vertex?
A. 1 m
B. 4 m
C. 3 m
D. 9 m
Answer: A
Mathematics
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Find the common difference d and the nth term an of the arithmetic sequence with the specified terms. 10th term is 31; 16th term is 33
A. d = 
; an = 
n + 
B. d = 
; an = 
n + 
C. d = 
; an = 
n + 
D. d = 
; an = 
n + 
Mathematics
Use this table of conversion factors to help you answer the following questions.
58 cm = _____ in.
A. 25.1 B. 22.5 C. 22.9 D. 19.4 E. 21.7
Mathematics
Multiply and simplify.
? 210
A. 140
B. 120
C. 
D. 
Mathematics
Solve the problem.Sue buys a house for $273,000. What is the value of the house 1 year later, if it depreciates by 8.8% in the first year after she buys it?
A. $248,976 B. $240,240 C. $32,760 D. $24,024
Mathematics