Question

Which of the following is an appropriate estimate of the distance, in miles, from the west coast to the east coast of the United States?

A. 3 x 10-3
B. 3 x 10-1
C. 3 x 101
D. 3 x 103

Answer 1

D

10^-3 would make a decimal, so would 10^-1.
10^1 would be 30 miles, 10^3 would be 3 with 3 zeros ( 3000 miles) which would be most accurate