Answer :

Final answer:

The sum of 246.24, 238.278, and 98.3, rounded to the appropriate number of significant figures, is 582.8.

Explanation:

In this mathematical problem, we are being asked to add three decimal numbers: 246.24, 238.278, and 98.3. When adding and subtracting decimal numbers, the result should be reported to the smallest number of decimal places in your original numbers.

Here, the number with the smallest number of decimal places is 98.3, which only has one decimal place. Therefore, our answer should also be rounded to one decimal place.

First, let's add our numbers without considering significant figures: 246.24 + 238.278 + 98.3 = 582.818. Next, we need to round this answer to one decimal place. That would give us 582.8.

Learn more about Significant Figures here:

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Rewritten by : Barada

Answer:

The correct answer is 582.8.

Explanation:

To solve this problem, we must remember the rules for significant figures for addition. Recall that the answer should have the same number of decimal places as the term with the least number of decimal places that we are adding. In this case, we can see that out of our three terms, 98.3 has the least number of decimal places. This lets us know that our answer should be rounded to the tenths place.

With this in mind, we can compute the addition.

246.24 + 238.278 + 98.3

= 582.818 (unrounded value)

However, we stated that our answer should be rounded to the tenths place.

Therefore, our answer is 582.8.

Hope this helps!