Otto’s loose change jar contains twice as many nickels as pennies and two-thirds as many dimes as nickels. if the total is at least 3.65, what is the smallest possible number of coins in his collection

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