Multiple Choice The area of Greenland is 840,000 square miles. What is this number in scientific notation? (1 point) Responses 840 x 105 840 x 10 5 84 x 10–5 84 x 10 –5 8.4 x 105 8.4 x 10 5 8.4 x 10–5
8.4 x 10^5
To convert the area of Greenland, 840,000 square miles, into scientific notation, we move the decimal point so that there is one digit to the left of it. This gives us 8.4.
Since we moved the decimal point five places to the left, the exponent of 10 is -5.
Therefore, the correct scientific notation is 8.4 x 10^5.
To convert a number to scientific notation, we need to express it as the product of a number between 1 and 10 and a power of 10.
The given area of Greenland is 840,000 square miles. To write this in scientific notation, we need to move the decimal point so that there is only one non-zero digit to the left of it. In this case, we can move the decimal point 5 places to the left, resulting in the number 8.4.
Now, since we moved the decimal point to the left, we need to multiply by a positive power of 10 to compensate. In this case, we moved the decimal point 5 places to the left, so we multiply by 10^5.
Combining these steps, we can write the area of Greenland in scientific notation as 8.4 x 10^5.
Therefore, the correct answer is: 8.4 x 10^5.