According to the Wall Street Journal, 14,200,000 videotape copies of Walt Disney's Fantasia have been sold to date. Write that number in scientific notation.
a. 142 × 1,000,000
b. 1.42 × 107
c. 1.42 × 106
d. 142 × 107
All scientific notation must be a number between 1 and less than 10 times a power of ten. Therefore answers a and d are out because 142 is not a number between and less than 10. c) is incorrect because it does not move the decimal point enough places to the right.
