Write interval notation for the following. Then graph the interval on a number line.{x? x > 2.5}
A. [2.5, ?)
B. (2.5, ?)
C. (-?, 2.5)
D. (-?, 2.5]
Answer: B
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Using Green's Theorem, calculate the area of the indicated region.The area bounded above by y = 2x2 and below by y = 4x3
A. 
B. 
C. 
D. 
Solve the system of equations by graphing.
A. (3, 4) B. no solution C. (-4, 3) D. (3, -4)
Describe the situation with a linear inequality and then solve the inequality.A standard train ticket in a certain city costs 
per ride. People who use the train also have the option of purchasing a frequent rider pass for 
each month. With the pass, a ticket costs only
per ride. Use an inequality to determine the number of train rides in a month for which purchasing the monthly pass is more economical than purchasing the standard train ticket.
A. 22 or more times B. 23 or more times C. 24 or more times D. 25 or more times
Use a half-angle formula to find the exact value of the expression.cos 
A. 
B. - 
C. - 
D. 
