r, % 4 6 8. 10 Suppose that at time t = 0, $500 is invested in an interest- earning account. Let B = f(r,t) represent the balance in the account, in dollars, after t years, assuming an annual interest rate of r%. Values of the function f are given in the table to the right. 1 510 520 531 542 552 2 520 542 564 586 610 t, 531 564 598 635 674 yrs 4 542 587 635 688 745 553 610 674 745 823 Estimate the value of ft(8,3). Then, give a complete sentence interpretation of your answer in the context of this problem. Do you expect the value of fr(6,0) to be positive, negative, or zero? First, clearly answer the question. Then, give a complete sentence explanation of your answer.

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