Find the following. Assume that letters can represent any real number.
A. Not a real number
B. 5
C. -5
D. 25
Answer: C
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Solve the problem.The Little Town Arts Center charges $20 for adults, $15 for senior citizens, and $9 for children under 12 for their live performances on Sunday afternoon. This past Sunday, the paid revenue was 
for 891 tickets sold. There were 48 more children than adults. How many children attended?
A. 287 children B. 278 children C. 326 children D. 316 children
Solve the problem.The volume of wood, V, obtained from a tree varies jointly as the height, h, and the square of the girth (the distance around the tree trunk), g. If the volume is 38.4 ft3 when the height is 30 ft and the girth is 
what is the volume when the height is 40 ft and the girth is 6 ft?
A. 110.96 ft3 B. 117.55 ft3 C. 115.2 ft3 D. 118.2 ft3
Solve the equation.7x - 7 - 2(x + 1) = -(-3x - 4)
A. 
B. 
C. 
D. 
Solve the problem.What is the range of the cosine function?
A. all real numbers greater than or equal to 0 B. all real numbers C. all real numbers from -1 to 1, inclusive D. all real numbers greater than or equal to 1 or less than or equal to -1