Answer: 19.44 hours or 19 hours and 26 minutes.
Step-by-step explanation:
1. To lose 1 pound, a 200-person must burn 3,500 calories. Therefore, to lose 2 pounds that person must burn 7,000 calories.
2. If the person burns 180 calories by walking for 30 minutes or [tex]\frac{1}{2}[/tex] hour, to calculate the time in hours the person has to walk to lose 2 pounds, you can multiply 7,000 calories by [tex]\frac{1}{2}[/tex] hour and divide by 180 calories:
[tex]time=\frac{(7,000Cal)(\frac{1}{2}h)}{180Cal}\\time=19.44h[/tex]
3. You have:
[tex]minutes=(0.44)(60)\\minutes=26.4min\\minutes=26min[/tex]
4. Then, you can express it as following:
19 hours and 26 minutes
