Answer:
42
Step-by-step explanation:
4 years
After 3 years:
400(1.1³) = 532.4
n additional years
600 = 532.4(1.2^n)
1500/1331 = 1.2^n
ln(1500/1331) = n×ln1.2
n = 0.655
5th year
x^3- 3x^2+ 5x
basically divide the coefficents by 5
Check the picture below, notice the angles encircled in purple.
