Distance = rate * time
t = d / r
t = 91 / 14 = 6.5 hrs
plus 2 hour rest stop
8.5 hrs
start at 7 AM
end at 3:30 PM
Kenny bought 4 1liter bottles of water
1liter is equal to 1,000 milliliters (milli means 1,000)
What that means is that in each bottle of water that he purchased, he has 1,000 milliliters
He has 4 bottles, so we simply take
4(bottles) x 1,000(amount of water in each bottle)
4 x 1,000 = 4,000 milliliters
If you are buying something that cost $15 and sale tax is 6%, you can calculate final bill trough proportions:
$15:100%=$x:106%
100x=106*15, x=(106*15)/100, x=$15.9 is final bill.
You can also use easier way: $15+0.06*$15=$15.9
Explanation for 2nd way: Cost is $15, on that you need to add 6% of $15: (6%/100%)*$15 and that is 0.06*15.
The area of a circle is pi times the radius squared
