Question

How many significant digits are there in the number 5.5x10?? OA) 2 O B) 3 OC) 4 OD) 5​

Answer 1

2

`\\ \sf\longmapsto 5.5* 10^3`

• Take decimals away

`\\ \sf\longmapsto 55* 10^4`

We know

• Zeros to the right end of a number are not counted among significant figures

Hence number of significant figures is 2

Answer 2

9514 1404 393

Answer:

2

Explanation:

When a number is written in scientific notation, all of the digits of the mantissa are considered significant. The mantissa is 5.5, which has 2 digits.

There are 2 significant digits in the number.