A bank records the number of mortgage applications and its own prevailing interest rate (at the first of the month) for each of 16 consecutive months. Find the best-fitting line for the interest rate (x) and the number of applications (y).
Interest9.59.910.010.511.011.511.012.0Number2729252519201713Interest12.012.513.013.513.012.511.511.5Number1510101010111518?
A. 
B. ?
C. ?
D. ?
E. ?
Answer: E
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In a certain laboratory experiment the amount A, in grams, of a radioactive substance remaining after t minutes is given by
.
A: Make a graph of A versus t over the first 60 minutes of the experiment.B: When is there a maximum amount of material present? Round your answer to two decimal places, if necessary.C: What is the maximum amount of material? Round your answer to two decimal places, if necessary.
What will be an ideal response?
Use the Trapezoidal Rule with n = 4 steps to estimate the integral.
A. 22
B. 
C. 15
D. 11
Let A = {1, 3, 5, 7}B = {5, 6, 7, 8}C = {5, 8}D = {2, 5, 8}U = {1, 2, 3, 4, 5, 6, 7, 8}.Determine whether the statement is true or false.A ? {7, 5, 3, 1}
A. False; the elements in A are in a different order. B. False; A has different elements than those listed. C. False; the elements in A are the same as those listed. D. True
Solve the problem.Suppose that the function y = f(x) is increasing on the interval (7, 9). Over what interval is the graph of 
increasing?
A. (3, 5) B. (28, 36) C. (11, 13) D. (7, 9)