(I) How many significant figures do each of the following numbers have:


(g) 8700

How many times does a typical person blink her eyes in a lifetime?

How many gallons of gasoline are used in the United States in one day? Assume that there are two cars for every three people, that each car is driven an average of 10,000 miles per year, and that the average car gets 20 miles per gallon.

How many significant figures are in the value 60.780?

Estimate the average speed with which the hair on your head grows. Give your answer in both m/s and m/hour. Briefly describe how you arrived at this estimate.

As an architect, you are designing a new house. A window has a height between 140 cm and 150 cm and a width between 74 cm and 70 cm. What are the smallest and largest areas that the window could be?

How many significant figures are there in each of the following values? (d) 0.07 x 10^8