Question

In the final answer of the expression
(29.2 - 20.2) (1.79×10⁵ )/1.37
the number of significant figures is :
(a) 1 (b) 2 (c) 3 (d) 4

Answer 1

The answer of the given expression contain two significant figures

Explanation:

Significant figures are the numbers that give a meaningful measurement of an experiment.

• The given expression is $(29.2 - 20.2) \frac{(1.79\times 10^{5} )}{1.37}$

• We can solve this as follows.

• $(29.2 - 20.2) \frac{(1.79\times 10^{5} )}{1.37}=\frac{9.2 \times 1.79 \times 10^{5}}{1.37}$

• In above equation we can observe that 9.2 is a number in the mathematical operation that is containing least number of digits i.e., two only.

• Hence by solving these we can consider the answer with two digits only.

• Hence the number of significant figures in the final answer of the given expression is 2.