Mrs. ronilo had her students make a stem-and-leaf plot of the heights of all of the students in the class. the mean was 55. dave was absent the day they did this, and he is 57 inches tall. how does adding him into the data change the measures of central tendency?

1. a music store marks up the instruments it sells by 30%. a. if the store bought a guitar for $45, what will be its store price? b. if the price tag on a trumpet says $104, how much did the store pay for it? c. if the store paid $75 for a clarinet and sold it for $100, did the store mark up the price by 30%?