Express 18 million in scientific notation.
I answered 1.8 x 10 to the 7th and was wrong. I don't understand why? You are supposed to move the decimal 7 places to get 18 million. What did I do wrong? Thank You.
18 million
= 18,000,000
= 1.8 x 10^7
You were right, whoever marked it wrong, is wrong!
65 days
To express 18 million in scientific notation, you need to represent it as a number between 1 and 10 multiplied by a power of 10.
You are correct that you need to move the decimal point, but you mistakenly moved it only one place instead of six places to the left.
To convert 18 million to scientific notation, you need to move the decimal point six places to the left, as there are six digits after the initial 1. Thus, the correct answer is:
1.8 x 10^7
Here's the step-by-step process:
1. Start with the number 18,000,000.
2. Move the decimal point six places to the left. You now have 1.8.
3. Multiply by 10 raised to the power of 7, as you moved the decimal point seven places to the left. This gives you 1.8 x 10^7.
So, the correct scientific notation for 18 million is 1.8 x 10^7.