Evaluate the expression.
?
?
, x< -5
?
A. -1
B. -3
C. -23
D. -26
E. -25
Answer: A
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Compute the value of the given expression.
A. 13 B. -13 C. -7 D. 7
Find any missing lengths in the similar shapes.
A. x = 4.286 in., y = 3.75 in., z = 6.83 in. B. x = 6.83 in., y =3.75 in., z = 4.286 in. C. x = 0.233 in., y = 3.75 in., z = 0.146 in. D. x = 4 in., y = 3.75 in., z = 6.375 in.
Convert the mass as indicated.5.5 grams to kilograms
A. 550 kg B. 0.0055 kg C. 5500 kg D. 0.00055 kg
Solve the problem.In a Psychology class, the students were tested at the end of the course on a final exam. Then they were retested with an equivalent test at subsequent time intervals. Their average scores after t months are given in the table. 
Using a graphing utility, fit a logarithmic function y = a + b ln x to the data. Using the function you found, estimate how long will it take for the test scores to fall below 84%. Express your answer to the nearest month.
A. 8 months B. 20 months C. 12 months D. 10 months