The students measure another ball with the ruler in Problem 2.93 and determine that its diameter is 2.55 cm. What is the radius of the ball to the correct number of significant figures?

Data from Problem 2-93

Using a ruler marked in centimeters and millimeters, a student measures the diameter of a ball to be 1.5 cm. His partner measures the same ball with the same ruler and comes up with 1.50 cm. Which student used the ruler incorrectly? How did that student use the ruler incorrectly?

Transcribed Image Text:

cm 20 3