Sarah exercised for 30 minutes. Kari exercised long enough to burn 800 Calories. Who exercised for a longer
period of time, Sarah or Kari? Explain

Karl exercised longer - it takes the average person several hours to burn 800 calories, or an hour at least. If he really tried, he could feasibly do it in 40 minutes, but likely not less. This is an educated guess because the question doesn't give enough information.

Step-by-step explanation:

Knowledge about the human body and how quickly we burn calories.

4th option is correct xy=-10

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168

step-by-step explanation:

first off, we know that he drove 3.5 hours at a rate of 48 mph.

knowing that, we want to see how many miles he drove all-together.

in this case, we can just multiply 48 by 3.5.

48 * 3.5 = 168