Question

Express 6.45372-6.454 to four significant figures

Answer 1

Answer:

6.454 is the expression for 6.45372 in 4 significant digits

Explanation:

We know that

According to definition of significant digits

The first doubtful digit and accurately known digits are called significant digits.

In our case the reading is 6.45372 if we have to convert it into four significant digits then we have to approximate it to 4 significant digits that is

6.45372 ≈ 6.454

I add 1 in 3 to get 4 on most right because 4th decimal place digit is 7 which is greater then 5.

Thus

6.454 is the expression for 6.45372 in 4 significant digits