Question

Correctly rounded, the product 3.000 cm × 30.0 cm is

(a) 9.0 x 10^1 cm^2

(b) 9.000 x 10^1 cm^2

(c) 9 x 10^1 cm^2

(d) 9.00 x 10^1 cm^2

I have been asked this question in class test.

Question is taken from Signifiant Figures topic in chapter Introductory Concepts of Chemical Process Calculation

Answer 1

Correct choice is (d) 9.00 x 10^1 cm^2

For explanation: The measurement with the least number of significant digits determines the number of significant digits in the quotient.