Final answer:
The number of products sold is approximately 40949.5 units. The answer is not provided in the options given.
Step-by-step explanation:
The given model is y = 89.5 + 2.27x, where x represents the cost of advertising in thousands of dollars and y represents the number of products sold in thousands. To predict the number of products sold in units, we need to substitute the given cost of advertising into the equation.
If the cost of advertising is $18000, we substitute x = 18000 into the equation:
y = 89.5 + 2.27(18000)
y = 89.5 + 40860
y = 40949.5