Question

Add 7.21, 12.141 and 0.0028 and express the result to an appropriate number of significant figures.

Answer 1

Correct answer is 19.3538 But for significant figure the correct answer will be 19.35
hope it works

Answer 2

Answer:

$N=1.93538\times 10^1$

Explanation:

In this case, we have to add 7.21, 12.141 and 0.0028 and write the appropriate number of significant figures.

Significant figures are those figures that are written in the form of accuracy.

Taking 7.21 + 12.141 + 0.0028 = 19.3538

In the form of significant figures, 19.3538 can be written as :

$N=1.93538\times 10^1$

Number of significant figures are 6

Hence, this is the required solution.