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

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

Step-by-step explanation:

We have , and . The significant digits of a number are digits that includes all digits except:

Here and with significant digit rules . Now, Sum of both numbers =

⇒Sum of both numbers =

⇒Sum of both numbers =

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

using the formula for pythagorean theorem (a2+b2=c2)(the twos are exponents), and knowing that you have b squared and c squared, just reverse it. 26 squared minus 10 squared equals c squared. 26 squared is 676 and 10 squared is 100. you get 576, then use your square roots to undo the squared numbers to get 24.