The last page of a book is numbered 764.The book is 3.0 cm thick,not including its covers.What is the average thickness (in centimeters)of a page in the book,rounded to the proper number of significant figures?
A)0.0039 cm
B)0.072 cm
C)0.0079 cm
D)0.00393 cm
E)0.00785 cm

Question

Quizplus · Accepted Answer

To find the average thickness of a page, we need to divide the total thickness of the book (3.0 cm) by the total number of pages (764). 
Average thickness = 3.0 cm/ 764 pages = 0.00393 cm/page = 0.0079 cm (rounded to two significant figures). 
Therefore, the best choice is C.

The Last Page of a Book Is Numbered 764