The exact value for the density of aluminum is 2.699g/cm3 . working in the science lab at school , joseph finds the density of a piece of aluminum to be 2.75 g/cm3 . what is joseph percent error? (round to the nearest hundredths)

The line plot below represents the number of letters written to overseas pen pals by the students at the waverly middle school.each x represents 10 students. how many students wrote more than 6 and fewer than 20 letters. a.250 b.240 c.230 d.220