What is the percentage increase from 19 to 300

John bought 5 lemons and used 2 of them for a salad how much did he use for.a salad . he used % of the lemons.

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?

Thompson and thompson is a steel bolts manufacturing company. their current steel bolts have a mean diameter of 127 millimeters, and a variance of 36. if a random sample of 35 steel bolts is selected, what is the probability that the sample mean would differ from the population mean by greater than 0.5 millimeters? round your answer to four decimal places.