48 since he eats 4 a minute and 4 times 12 equals 48.
Answer:
The 99% confidence interval for the population mean is 22.96 to 26.64
Step-by-step explanation:
Consider the provided information,
A sample of 49 customers. Assume a population standard deviation of $5. If the sample mean is $24.80,
The confidence interval if 99%.
Thus, 1-α=0.99
α=0.01
Now we need to determine 
Now by using z score table we find that 
The boundaries of the confidence interval are:

Hence, the 99% confidence interval for the population mean is 22.96 to 26.64
Answer:
OPTION 3!
Step-by-step explanation:
Option 3 tells us that when f(x) is 2, x tends to -infinity; and when f(x) tends to infinity it does at x=4.