Final answer:
The client can expect to lose 5.7 pounds per week by eating an average of 1200 calories per day and participating in three 40-minute workouts in a week.
Step-by-step explanation:
To find how many pounds the client can expect to lose, we need to substitute the given values of calories and workouts into the weight loss function. The function is:
Weight loss = f(n, c) = (3/20) * n² - (1/5) * c + (4841/20)
Substituting n = 3 workouts per week
and c = 1200 calories per day into the function:
Weight loss = (3/20) * 3² - (1/5) * 1200 + (4841/20)
= (9/20) - (240/5) + (4841/20)
= -5.7 pounds per week
Therefore, the client can expect to lose approximately 5.7 pounds per week by eating an average of 1200 calories per day and participating in three 40-minute workouts in a week.