Question

calculate the answer to the appropriate number of sig figs.
246.24
238.278
+ 98.3
a. 582.82
b. 582.818
c. 582.8
d. 583

Explanation:

Step1: Add the numbers

$246.24+238.278 + 98.3=582.818$

Step2: Determine significant - figures for addition

When adding numbers, the result should be rounded to the same number of decimal places as the number with the fewest decimal places among the values being added. 98.3 has one decimal place, while 246.24 has two and 238.278 has three. So, we round 582.818 to one decimal place.

Step3: Round the result

Rounding 582.818 to one decimal place gives 582.8

Answer:

c. 582.8