To find the answer, set up an equation:

Using this set up we can cross out the units that are on opposite sides of the proportion such as miles and hours, leaving us with the desired units of meters and seconds. Then calculate m/s by multiplying 45 by 1000 meters and then dividing that value by 3600 seconds.
The resulting answer is 45mph = 12.5 m/s
Since she need to mix 1 part concentrate with 10 part of water results to a juice to water ratio of 1 : 10.
This is the correct solution if I am not mistaken :)
For the first one it is 2 miles and for number 2 it is $4.76
The answer is choice 4, they add up to 180°