Answer:
The answer is: 22,332 mowers will be sold 6 years after a model is introduced.
Step-by-step explanation:
Given that y = 5500 ln (9t + 4)
In order to calculate the number of mowers (y) that will be sold after 6 years, substitute t = 6 (years):
y = 5500 ln (9 × 6 + 4) = 5500 In 58
In 58 = natural logarithm of 58 = 4.0604
Therefore, y = 5500 In 58 = 5500 × 4.0604 = 22,332.44 = 22,332 mowers.