Add or subtract. Simplify all answers. Express as a mixed number.13
+ 9
A. 13
B. 21
C. 22
D. 23
Answer: C
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The figure shows the velocity v or position s of a body moving along a coordinate line as a function of time t . Use the figure to answer the question. s (m)
When is the body moving forward?
A. 0 < t < 1, 3 < t < 4, 5 < t < 7 B. 0 < t < 3, 3 < t < 5, 5 < t < 8 C. 0 < t < 8 D. 0 < t < 1, 3 < t < 4, 5 < t < 7, 9 < t < 10
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. half-open interval; {x|-8 < x ? -4}; (-8, -4] B. closed interval; {x|-8 ? x ? -4}; [-8, -4] C. open interval; {x|-8 < x < -4}; (-8, -4) D. half-open interval; {x|-8 ? x < -4}; [-8, -4)
Solve the problem.A loan of $14,000 is made at 12% interest, compounded annually. After t years, the amount due, A, is given by the function A(t) = 14,000(1.12)t .Find the doubling time. Round your answer to the nearest tenth.
A. 9.7 yr B. 17.6 yr C. 12.2 yr D. 6.1 yr
The histogram shows the scores of each participant in a game from a total of 100 participants. 
How many more participants scored 60-79 than 20-39?
A. 26 participants B. 35 participants C. 22 participants D. 13 participants