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. 12 months
B. 8 months
C. 20 months
D. 10 months
Answer: C
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Add the appropriate constant to complete the square, then factor the resulting perfect square trinomial.x2 + 8x
A. x2 + 8x + 16; (x - 4)2 B. x2 + 8x + 64; (x + 8)2 C. x2 + 8x + 16; (x + 4)2 D. x2 + 8x + 0; (x + 4)2
A small country consists of four states. The population of State A is 67,200, the population of State B is 78,300, the population of State C is 73,800, and the population of State D is 80,700. The total number of seats in the legislature is 100.Under Jefferson's method, the apportionments to each state are
A. State A: 22 seats; State B: 26 seats; State C: 24 seats; State D: 26 seats. B. State A: 23 seats; State B: 26 seats; State C: 24 seats; State D: 27 seats. C. State A: 22 seats; State B: 26 seats; State C: 24 seats; State D: 28 seats. D. State A: 22 seats; State B: 26 seats; State C: 25 seats; State D: 27 seats. E. none of these
Use the Factor Theorem to determine whether x - c is a factor of f(x).f(x) = x3 + 8x2 - 18x + 20; x + 10
A. Yes B. No
Convert the fraction or mixed number to a decimal.
A. 0.4 B. 0.45 C. 0.35 D. 0.25