The owner of a luxury motor yacht that sails among the 4,000 Greek islands charges $600/person/day if exactly 20 people sign up for the cruise. However, if more than 20 people sign up (up to the maximum capacity of 90) for the cruise, then each fare is reduced by $5 for each additional passenger. Assume at least 20 people sign up for the cruise and let x denote the number of passengers above 20. Find a function R giving the revenue/day realized from the charter.
?
A. 
B. 
C. 
D. 
E. 
Answer: C
Mathematics
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Add or subtract as indicated. Write the answer in simplest form.
+ 
+ 
A. 4
B. 
C. 
D. 3
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Find the amplitude, period, or phase shift of the given function as requested.Find the period of y = 3 cos
.
A. ?
B. 3
C. 
D. 
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Graph the equation.(x + 1)2 = 7(y + 1)
A. 
B. 
C. 
D. 
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Find the indicated term of the sequence.The twenty-third term of the arithmetic sequence 1
, 7
, 13
, ...
A. 139
B. 133
C. -131
D. -137
Mathematics