Question

how many significant figures are present in the sum of 6.0025 + 9.1 ?
a 3
b 2
c 4
d none of the above

Explanation:

Step1: Calculate the sum

$6.0025 + 9.1=15.1025$

Step2: Apply significant - figure rules for addition

When adding numbers, we round the result to the same number of decimal places as the number with the fewest decimal places among the values being added. 9.1 has one decimal place. Rounding 15.1025 to one decimal place gives 15.1. The number 15.1 has 3 significant figures.

Answer:

A. 3