Roughly, it takes light less than 0.000000003 of a second to travel a one-meter distance. Express this number in the form of a * 10 ^ n where 1 < a < 10 and is a one-digit number. (1 point) 3 * 10 ^ - 8; 3 * 10 ^ 9; 3 * 10 ^ 8; 3 * 10 ^ - 8
The number expressed in scientific notation is 3 * 10 ^ -8.
To express a number in the form of a * 10 ^ n, where 1 < a < 10 and is a one-digit number, you need to count the number of times you move the decimal point to the left or right to get a value between 1 and 10.
In this case, we need to express the time it takes for light to travel a one-meter distance in the given format.
The time is less than 0.000000003 of a second. To express this in scientific notation, we need to move the decimal point to the right until we have a number between 1 and 10.
We move the decimal point 9 places to the right, which gives us 0.000000003. This can be written as 3 * 10^-9.
Therefore, the correct answer is 3 * 10^-9.
To express the number in the form of a * 10 ^ n, we can convert the given time of less than 0.000000003 seconds to scientific notation.
0.000000003 can be written as 3 * 10^-9.
Therefore, the correct answer is 3 * 10^-9.