Use the graph to find a ? > 0 such that for all x, 0 < 
< ? ? 
< ?.
A. 1
B. 3
C. 0.4375
D. 0.5625
Answer: C
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Solve.A certain radioactive isotope has a half-life of approximately 1450 years. How many years to the nearest year would be required for a given amount of this isotope to decay to 40% of that amount?
A. 1877 years B. 1069 years C. 870 years D. 1917 years
Solve.An experienced accountant can balance the books twice as fast as a new accountant. Working together it takes the accountants 6 hours. How long would it take the experienced accountant working alone?
A. 3 hr B. 12 hr C. 9 hr D. 15 hr
Find the date due and the maturity value.
A. Date Due: September 18 Maturity value: $9132.60 B. Date Due: September 18 Maturity value: $9061.73 C. Date due: September 18 Maturity value: $9234.65 D. Date Due: September 19 Maturity value: $9584.36
Solve the problem.The function f(t) = -0.12t2 + 0.53t + 30.4 models the U.S. population in millions, ages 65 and older, where t represents years after 1990. The function g(t) = 0.53t2 + 11.9t + 106.4 models the total yearly cost of Medicare in billions of dollars, where t represents years after 1990. What does the function 
represent? Find 
(10).
A. Cost per person in thousands of dollars. $11.75 thousand B. Cost per person in thousands of dollars. $9.94 thousand C. Cost per person in thousands of dollars. $0.09 thousand D. Cost per person in thousands of dollars. $0.17 thousand