Which of the following numbers expresses the value 2600. calories (an exact measurement)with both the correct units and proper scientific notation?

Question

Quizplus · Accepted Answer

2600 calories expressed in scientific notation is 2.6 x 10^3 cal. However, the units need to be converted from cal (calories) to kcal (kilocalories). Since 1 kcal = 1000 cal, 2600 cal is equivalent to 2.6 kcal. Therefore, the answer is B: 2.600 x 10^3 cal, or 2.6 x 10^1 kcal.

Which of the Following Numbers Expresses the Value 2600