What is the total length of two pieces of tubing which measure 4.5 cm and 3.222 cm? Express the answer to the correct number of significant figures.
A)3.722 cm
B)4.722 cm
C)7.722 cm
D)7.7 cm
E)8 cm

Question

Quizplus · Accepted Answer

The total length is 4.5 cm + 3.222 cm = 7.722 cm. However, since the least precise measurement is to the nearest tenth (4.5 cm), the answer should be expressed to the nearest tenth as well, which is 7.7 cm.

What Is the Total Length of Two Pieces of Tubing