Answer:
641 times
Step-by-step explanation:
Rate of transfer in 1989
2.4 kilobytes per second
Rate of transfer in a typical modem
1000 kilobyte per 0.65 seconds
Transfer per second for typical modem
1000/0.65=1538.461538 kilobyte per second
Comparing typical modem to 1989
[tex]\frac {1538.461538 kilobyte/s}{2.4 kilobyte/s}[/tex]
=641.025641 times faster
Rounding off, this is 641 times faster
Therefore, ans=641 times
