Question

I think I got this wrong. Can someone quickly check my answer?

Answer 1

c) How many Milky Way (Original Single 52.2g) chocolate bars does the runner need to buy to supply the amount of energy to complete a half-marathon (13.1 miles)? (Cite your source for the number of calories in a Milky Way bar)

Answer 2

Here is what I have:
15km = 9.3 miles The runner uses 900 kcals in 15km
13.1 miles = about 21 kilometers
Add 6 miles to the amount of kilocalories he is using. (Adding 360)
He will use about 1260 kilocalories in this run
1 kilocalorie = 1000 calories
He will need 1,260,000 calories
Milky way has 270 calories
He will need 4666 milky way bars
http://caloriecount.about.com/calories-milky-way-bar-i101060

Answer 3

900kcal/15km = (900/15) kcal/km = 900/(15x 0.621) kcal/mile . Simply multiply with this with the given number of miles.