Set up an algebraic equation and then solve the following problems. the height of an object dropped from the top of a 64-foot building is given by h(t)=-16t^2+64. how long will it take the object to hit the ground?

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