Question

Find the sum of 3.0478 and 4.92 using the correct number of significant digits.

Answer 1

The sum of 3.0478 and 4.92 is $7.9678$, which have 5 significant digits.

Step-by-step explanation:

We have , $Number1 = 3.0478$ and $Number2 =4.92$ . The significant digits of a number are digits that includes all digits except:

• All leading zeros. For example, "013" has two significant figures: 1 and 3;

• Trailing zeros when they are merely placeholders to indicate the scale of the number and  ,

• Spurious digits introduced, for example, by calculations carried out to greater precision than that of the original data, or measurements reported to a greater precision than the equipment supports.

Here $Number1 = 3.0478$ and with significant digit rules $Number2 = 4.9200$ . Now, Sum of both numbers = $Number1 + Number2$

⇒Sum of both numbers = $3.0478 + 4.9200$

⇒Sum of both numbers = $7.9678$

∴ The sum of 3.0478 and 4.92 is $7.9678$, which have 5 significant digits.