Chapter P, Prerequisites - Section P.5 - Algebraic Expressions - P.5 Exercises - Page 37: 91

See the explanation

$A=2000(1+r)^3$ a. $A=2000(1+r)^3=2000(r^3+3r^2+3r+1)=2000r^3+6000r^2+6000r+2000,$ polynomial of degree 3. b. $\begin{array}{lll} Interest-rate & Amount-A\\ r_1=2\%&A_1=2122.45\\ r_2=3\%&A_2=2185.45\\ r_3=4.5\%&A_3=2282.33\\ r_4=6\%&A_4=2382.03\\ r_5=10\%&A_5=2662.00 \end{array}$