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: Determine significant - figures for addition

When adding, we consider the decimal - place of the least precise number. 9.1 is precise to the tenths place. Rounding 15.1025 to the tenths place gives 15.1. The number 15.1 has 3 significant figures.

Answer:

A. 3