Final answer:
To find the rate in miles per hour at which a dog runs if it covers 5 miles in 15 hours, we use the formula 'Rate = Distance ÷ Time'. This gives us a rate of 1/3 mile per hour, which is answer C.
Step-by-step explanation:
The question asks to find the rate at which a dog runs in miles per hour if it runs 5 miles in 15 hours. To calculate the rate of speed, you divide the distance traveled by the time taken. The formula for the rate is:
Rate = Distance ÷ Time
Applying this formula:
Rate = 5 miles ÷ 15 hours = 1/3 mile per hour
The dog's rate of speed is therefore 1/3 mph, which corresponds to answer choice C.