Mike waits on tables and is paid $2.00 an hour. in a 30-hour period, he earned $310.50 in tips. what were his total earnings

Step-by-step explanation: 2.00 x 30 hrs = 60.00 dollars for the fill 30 hours.

Take the 60.00 + his tips 310.50= 370.50 was he Total earnings

d. 24+-0.114

step-by-step explanation:

the question requires us to calculate the approximate 95% confidence interval for the mean number of ounces of ketchup per bottle in the sample given the following statistics;

sample mean = 24

standard deviation, σ = 0.4

sample size , n = 49

the confidence interval for a population mean is calculated using the formula;

sample mean ± z-score*(σ/sqrt(n))

the z-score associated with a 95% confidence interval, from the standard normal tables, is;

1.96

substituting these values into the formula;

24 ± 1.96*(0.4/7)

= 24 ± 0.112

from the alternatives given, choice d is closest to the above expression;