If a person cross-country skis for 35 minutes, how many calories will be burned?

700 calories are burned in 1 hour.

I do not know how to set it up?

set up a ratio
cal/35 = 700/60

cross-multiply and solve for 'cal'
you should get appr. 408

To set up the equation, you can use a proportion.

First, write down the given information:
- 700 calories are burned in 1 hour of cross-country skiing.

Now, let's set up the proportion:
calories burned / time spent skiing = calories burned per hour / 1 hour

Let's substitute the known values into the proportion:
cal / 35 minutes = 700 calories / 60 minutes

To solve for 'cal,' we cross-multiply:
cal * 60 minutes = 700 calories * 35 minutes

Simplify the equation:
60cal = 24500 calories

Now, solve for 'cal':
cal = 24500 calories / 60

Using a calculator, you will find that cal is approximately 408 calories.

Therefore, if a person cross-country skis for 35 minutes, they would burn around 408 calories.