Write an estimate of 9 billion and express the result as a product of a single digit and an integer power of 10.

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Answer 1

To express 9 billion in scientific notation as a product of a single digit and an integer power of 10, we can break it down as follows:

1. Write 9 billion in numeric form: \[ 9,000,000,000 \]

2. Represent it in scientific notation:

   • We can express 9 billion as \( 9 \times 10^9 \).

Thus, \( 9 \text{ billion} = 9 \times 10^9 \).

Final Answer: \( 9 \times 10^9 \)

Verification: To check, we multiply \( 9 \times 10^9 \): \[ 9 \times 10^9 = 9,000,000,000 \] This confirms that our representation is correct.