2.2 and 2.3 SO Take 2/5 and that what you get
1 mile=1258 foot
1 foot=12 inches
63360 is the correct answer
Ten percent of 640 is 64.
640/100=6.4
6.4*10=64.
There are many other ways to find this but that is the way I have always used :)
Hope this helps!
Try -3x-8 hope that helps
