Solve.
- 
= 
A. ±4
B. 
C. ±4i
D. No solution
Answer: D
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Solve the problem.Find an equation for the level curve of the function f(x, y) = 
that passes through the point 
.
A. y = -25 B. y = 25 C. y = ± 5 D. y = 5
Construct the requested tree diagram.Construct a tree diagram that shows all possible 2-letter code words using only the letters c and d without repetition.
A.
| /\ |
| c | d |
| /| | | |
| c | d | c |
B.
| | |
| c |
| | |
| d |
C.
| /\ |
| c | d |
| /\ | /\ |
| c | d | c | d |
D.
| /\ |
| c | d |
| | | | |
| d | c |
Find a formula for the nth partial sum of the series and use it to find the series' sum if the series converges.5 + 
+ 
+ ... + 
+ ...
A. 
; 
B. 
; 
C. 
; 
D. 
; 
Solve the problem.A summer camp wants to hire counselors and aides to fill its staffing needs at minimum cost. The average monthly salary of a counselor is $2400 and the average monthly salary of an aide is $1100. The camp can accommodate up to 45 staff members and needs at least 30 to run properly. They must have at least 10 aides, and may have up to 3 aides for every 2 counselors. How many counselors and how many aides should the camp hire to minimize cost?
A. 35 counselors and 10 aides B. 18 counselors and 12 aides C. 12 counselors and 18 aides D. 27 counselors and 18 aides