Question

Give the correct number of significant figures for the problem below. 2.4 x 10⁻⁴ / 3.1 x 10⁻² =

a) 2
b) 3
c) 4
d) 5

Answer 1

In this number, there are 3 significant figures. Therefore, the correct answer is: b) 3

Step-by-step explanation:

To determine the correct number of significant figures in the result of

3.1×10 −2÷2.4×10 −4​= 3.1÷2.4×10 −4−(−2)

2.4÷3.1×10 2

0.774193548×10

To express this in standard form (scientific notation), we write it as:

7.74193548×10

In this number, there are 3 significant figures.

Therefore, the correct answer is:

b) 3