Find the least common denominator for the fractions in the list.
, 
, 
A. 270x5
B. 54x2
C. 135x20
D. 90x5
Answer: A
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Convert the quantity to the desired unit.How many days are in 6 weeks?
A. 84 B. 144 C. 42 D. 360
Underline the digit that occupies the given place.0.043
Thousandths place
A. 0.0
3
B. 0.04
C. 0.
43
D. 
.043
Find the maximum or minimum value of the given objective function of a linear programming problem. The figure illustrates the graph of feasible points. 
Objective Function: z = -x - 5yFind maximum.
A. maximum: -27 B. maximum: -14 C. maximum: -18 D. maximum: -22
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. 12 months C. 20 months D. 10 months