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

B) 1.42 x 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.

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