What is the quotient of 2.43 ÷ 4.561 expressed to the correct number of significant figures?
A) 5.3278 × $10 ^{- 1}$
B) 5.328 × $10^ {- 1}$
C) 5.33 × $10^ {- 1}$
D) 5.3 × $10^ {- 1}$

Question

Quizplus · Accepted Answer

To determine the quotient of 2.43 ÷ 4.561, we divide 2.43 by 4.561 using a calculator or long division. The result is 0.531766277, but we need to express the answer to the correct number of significant figures. 
Since 2.43 has three significant figures and 4.561 has four significant figures, our answer must have three significant figures. We round the number 0.531766277 to three significant figures. The third significant figure (1) is less than five, so we drop the remaining digits. Therefore, the answer is 0.533, which we express in scientific notation as 5.33 × 10^-1.

What Is the Quotient of 2 10−110 ^{- 1}10−1 B) 5328 ×

What Is the Quotient of 2 $10 ^{- 1}$ B) 5328 ×