The equation gives the position s = f(t) of a body moving on a coordinate line (s in meters, t in seconds). s (m)
When is the body moving forward?
A. 0 < t < 1, 3 < t < 4, 5 < t < 7, 9 < t < 10
B. 0 < t < 1, 3 < t < 4, 5 < t < 7
C. 0 < t < 8
D. 0 < t < 3, 3 < t < 5, 5 < t < 8
Answer: A
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Provide an appropriate response.The profit that the vendor makes per day by selling x pretzels is given by the function 
Find the number of pretzels that must be sold to maximize profit. Profit Made on Pretzel Sales
A. 350 pretzels B. 100 pretzels C. 700 pretzels D. 200 pretzels
Solve the problem.Find the amount of markup of an item which cost a store $258. The store has a 25% markup on cost.
A. $64.50 B. $206.40 C. $322.50 D. $1032.01
Use the quotient rule to divide and simplify.
A. 
B. 
C. 
D. 
Given the set sketched on the number line, identify the type of interval (open, closed, half-open, open infinite, closed infinite), write the set using set-builder notation, and write the set using interval notation.
A. open interval; {x| -6 < x < -1}; (-6, -1) B. half-open interval; {x|-6 < x ? -1}; (-6, -1] C. closed interval; {x|-6 ? x ? -1}; [-6, -1] D. half-open interval; {x|-6 ? x < -1}; [-6, -1)