Question 1
Fractions, Decimals and ApproximationSimplify 0.000215 × 0.000028 and express your answer in standard form.
- A.6.03 × 109
- B.6.02 × 109
- C.6.03 × 10−9
- D.6.02 × 10−9
Show the answer and explanation
Answer: D (6.02 × 10−9)
Explanation
215 × 28 = 6020, and the decimals give 2.15 × 10−4 × 2.8 × 10−5 = 6.02 × 10−9.