ISEE Word Problems Question 255: Answer and Explanation

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Question: 255

4. What is the value of ?

  • A. 7.0 × 103
  • B. 7.0 × 104
  • C. 7.0 × 109
  • D. 7.0 × 1010

Correct Answer: C

Explanation:

C

First divide the coefficients: = 0.7. Next divide the exponential terms, remembering that when you divide common bases, you subtract the exponents: = 1010. As 0.7 × 1010 is not in proper scientific notation form, move the decimal forward once and decrease the exponent by one: 7.0 × 109.

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