Avendor sold 64 hotdogs during a football game. if the ratio to hotdogs to hamburgers sold 8: 1, how many hamburgers did the vendor sell?

The anwser cause i do not understand just plez

Find the maximum value of p= 4x + 5y subject to the following constraints :

Monitors manufactured by tsi electronics have life spans that have a normal distribution with a standard deviation of 1800 hours and a mean life span of 20,000 hours. if a monitor is selected at random, find the probability that the life span of the monitor will be more than 17,659 hours. round your answer to four decimal places.