David drove for 3 hours at a rate of 50 miles per hour. for 2 hours at 60 miles per hour and for 4 hours at a rate of 70 miles er hour. what was his constant-speed for the whole journey?

Type the correct answer in each box. use numerals instead of words. the average number of subscribers to an online magazine each year from 2010 to 2015 is given in the table below. the average number of subscribers to the online magazine in 2010 was the percent increase in the average number of subscribers in 2011 to the average number of subscribers in 2012 was %. the maximum average number of subscribers to the online magazine in the years shown was