Question

Sam made a model of the library bell with a base circumference of 8 inches. If the base circumference of the actual library bell is 12 feet, what scale did he use?

A. 1:18
B. 1:18.5
C. 1:18.9
D. 1:19.5

Answer 1

To find the scale factor, divide the base circumference of the actual bell by the base circumference of the model.

Step-by-step explanation:

To find the scale factor, we need to compare the base circumferences of the model and the actual library bell. The model has a base circumference of 8 inches and the actual bell has a base circumference of 12 feet. We can convert the base circumference of the model to feet by dividing it by 12 (since there are 12 inches in a foot). So, the model has a base circumference of 8/12 = 0.67 feet.

Now, we can find the scale factor by dividing the base circumference of the actual bell by the base circumference of the model. The scale factor is 12/0.67 = 17.91. Rounding it to the nearest whole number, the scale factor is approximately 18.

Therefore, the correct scale factor Sam used is 1:18.