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. 20 months
B. 8 months
C. 12 months
D. 10 months
Answer: A
You might also like to view...
Eliminate the parameter of the pair of parametric equations.x = sin t, y = 3 cos t
A. 9x2 + y2 = 9 B. x2 + 9y2 = 9 C. x2 + 9y2 = 1 D. 9x2 + y2 = 1
Find the indicated premium. Round to the nearest cent. 
Find the monthly premium.Face Value: $30,000Age of Insured: 30Sex of Insured: MType of Policy: Term
A. $54.60 B. $56.70 C. $4.96 D. $5.15
Solve. Remember to insert units when writing your answer.The total pages of a hardbound book are 3.3 cm thick. The front and back covers are each 
thick. How high would a stack of 7 of these books be?
A. 25.76 cm B. 3.68 cm C. 49.7 cm D. 24.43 cm
Multiply.8x2(6x2 + 4x - 2)
A. 48x4 + 32x2 - 16 B. 48x4 + 32x - 16 C. 14x4 + 12x + 6 D. 48x4 + 32x3 - 16x2