Solve the problem.The graph shows the yearly average interest rates for 30-year mortgages for years since 1998 (Year 0 corresponds to 1998). Sketch a graph of the rate of change of interest rates with respect to time.
A. 
B. 
C. 
D. 
Answer: A
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Find the indicated directed path.Find a directed path from "D to B". 
A. "DECB" B. "No route exists." C. "DCB" D. "DEFAB"
Provide an appropriate response.In the initial simplex table below, find the pivot entry.
A. 10 B. -1 C. 6 D. 2 E. 0
Solve the problem using matrices.A chemist has prepared two acid solutions, one of which is 4% acid by volume, another 11% acid. How many cubic centimeters of each should the chemist mix together to obtain 50 cm3 of 
solution.
A. 3.61 cc of the 4% solution and 46.39 cc of the 11% solution B. 20 cc of the 4% solution and 20 cc of the 11% solution C. No solution D. 27 cc of the 4% solution and 23 cc of the 11% solution
Perform the indicated operations.30 + 16 ? 26
A. 506 B. 72 C. 1196 D. 446