Janna is measuring the dimensions of her bedroom to determine how much paint she should buy for the walls. If her measuring tape has increments of 0.01 meter, which of the following could be the length of one wall with the correct number of significant digits?

A. 4.9 meters

B. 4.932 meters

C. 5 meters

D. 4.93 meters

Question

Janna is measuring the dimensions of her bedroom to determine how much paint she should buy for the walls. If her measuring tape has increments of 0.01 meter, which of the following could be the length of one wall with the correct number of significant digits?




A. 4.9 meters





B. 4.932 meters





C. 5 meters





D. 4.93 meters

superflytyguy · Answer

D. 4.93 because 0.01 contains 3 significant figures, and you want your answer to contain the same number of significant figures.

anonymous · Answer

It's B. Significant digits include all digits that are known for certain plus the last digit, which contains some uncertainty.

Since Janna's measuring tape has 0.01-meter increments, she can know for certain the digits up to the hundredths place, plus the last digit, which will be an estimate.

Therefore, the measurement of the length of the wall will have four significant digits, with the last digit in the thousandths place.

Thus, 4.932 meters could be the length of one wall.