Question

round of each of the following quantities to 2 significant figures a. 25.5 5 ml b. 0.00254m​

Answer 1

Answer: a. $2.6\times 10^1$

b. $2.5\times 10^{-3}$

Explanation:

Significant figures : The figures in a number which express the value -the magnitude of a quantity to a specific degree of accuracy is known as significant digits.

Scientific notation is defined as the representation of expressing the numbers that are too big or too small and are represented in the decimal form with one digit before the decimal point times 10 raise to the power.

For example : 5000 is written as $5.0\times 10^3$

a) 25.55 ml is expressed as $2.6\times 10^1$

b) 0.00254 m is expressed as $2.5\times 10^{-3}$