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? 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?

a) You can buy 282.88 British pounds.

b) you should use 17.5 cups of flour.

Step-by-step 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.