Question

1.65 billion is the same as

a) 1.65×1012
b) 1.65×109
c) 1.65×106
d) 1.65×105
e) 1.65×103

Answer 1

1.65 billion expressed in scientific notation is 1.65×109, therefore the correct answer is option b) 1.65×109.

Step-by-step explanation:

To express 1.65 billion in scientific notation, we must first understand what each option represents:

• 1.65×1012 means 1.65 times 10 to the power of 12.
• 1.65×109 means 1.65 times 10 to the power of 9.
• 1.65×106 means 1.65 times 10 to the power of 6.
• 1.65×105 means 1.65 times 10 to the power of 5.
• 1.65×103 means 1.65 times 10 to the power of 3.

Billion means a thousand million, which is 1,000,000,000 or 109. Therefore, 1.65 billion is 1.65 times a billion, which is 1.65×109.

The correct answer to express 1.65 billion in scientific notation is option b) 1.65×109.