What is 5.5 * 10 ^ 4 multiplied by 2.2 * 10 ^ - 8 ? Write the answer in scientific notation. (1 point)
12.1 * 10 ^ - 4
O 1.21 * 10 ^ - 3
O 1.21 * 10 ^ - 4
O 1.21 * 10 ^ - 5
To multiply the numbers in scientific notation, we multiply the decimal parts and add the exponents.
5.5 * 10 ^ 4 multiplied by 2.2 * 10 ^ -8 can be written as (5.5 * 2.2) * (10 ^ 4 * 10 ^ -8).
Doing the math, 5.5 * 2.2 = 12.1, and 10 ^ 4 * 10 ^ -8 = 10 ^ (4-8) = 10 ^ -4.
Therefore, the answer is 12.1 * 10 ^ -4, which is written in scientific notation as 1.21 * 10 ^ -3.
So, the correct answer is "1.21 * 10 ^ - 3".
To multiply numbers in scientific notation, you can multiply the coefficients (5.5 * 2.2) and add the exponents (10^4 * 10^-8).
5.5 * 10^4 * 2.2 * 10^-8
= (5.5 * 2.2) * (10^4 * 10^-8)
= 12.1 * 10^(4 - 8)
= 12.1 * 10^-4
So, the answer in scientific notation is 1.21 * 10^-3.
Therefore, the correct option is O 1.21 * 10 ^ - 3.
To multiply numbers in scientific notation, we can easily multiply the decimal parts and add the exponents.
In this case, we have:
(5.5 * 10^4) * (2.2 * 10^-8)
First, multiply the decimal parts: 5.5 * 2.2 = 12.1
Next, add the exponents: 4 + (-8) = -4
Therefore, the result is 12.1 * 10^-4.
Writing this in scientific notation, we move the decimal point to the left until there is only one non-zero digit to its left, and record the number of places we moved it. In this case, we need to move the decimal point four places to the left, resulting in:
1.21 * 10^-3
So, the correct option is:
O 1.21 * 10 ^ - 3