A group compiled the following estimates on consumer use of e-mail worldwide.

(a) Complete the last column of the table by calculating the estimated number of messages per day that each user receives. (Round your answers to one decimal place.)

(b) The predicted number of messages per person per day in 2019 is how many times the estimated number in 2015? (Round your answer to two decimal places.)

____times greater

Year Number of users Messages per day (in millions) (in billions) 2015 2586 206.6 2017 2761 226.3 2019 2944 246.5 mplete the last column of the table by calculating the estimated number of messages per d Year Number of users Messages per day (in millions) (in billions) Messages per person per day 2015 2586 206.6 2017 2761 226.3 2019 2944 246. 5