Answer:
a) You can buy 282.88 British pounds.
b) you should use 17.5 cups of flour.
Explanation:
a) You arrive in London with $400. How many British pounds can you purchase with your US dollars if the conversion is $1.414 per British pound?
We can solve this problem by using a rule of three
1.414 dollars --- 1 British pound
400 dollars --- x British pounds
We solve for x,
x = 400/1.414 = 282.88
We can buy 282.88 British pounds.
b) Your goal is to prepare a recipe for a gathering of 21 people. If the original recipe serves 6 people and requires 5 cups of flour, how much flour should you use?
Again, we can use a rule of three.
6 people --- 5 cups of flour
21 people --- x cups of flour
We solve for x:
x= (21)(5)/6 = 105/6=17.5
We should use 17.5 cups of flour.