Find the total cost of a spa treatment is $42 including 6% tax and 20% tip

Julius sold five times as many computers as sam sold last year. in total, they sold 78 computers. how many computers did julius sell?

On saturday a souvenir shop had 125 customers.sixty four percent of the costumers paid with a credit card. how many costumers paid with cash?

Anormally distributed data set has a mean of 176.3 and a standard deviation of 4.2. what is the approximate z-score for the data value of 167.9? 2.00 −2.00 8.4 −8.4