What is 5.5×10^4 multiplied by 2.2×10^−8 ? Write the answer in scientific notation.
A. 1.21 x 10^-3
B. 1.21 x 10^-5
C. 12.1 x 10^-4
D. 1.21 x 10^-4
To multiply numbers in scientific notation, we multiply the coefficients and add the exponents.
The coefficient is calculated as 5.5 × 2.2 = 12.1.
The exponent is calculated as 4 + (-8) = -4.
Therefore, the answer is 1.21 × 10^(-4).
The correct option is D. 1.21 x 10^-4.
To multiply numbers in scientific notation, you multiply the coefficients and add the exponents.
First, multiply the coefficients:
5.5 × 2.2 = 12.1
Next, add the exponents of 10:
10^4 × 10^-8 = 10^(4 - 8) = 10^-4
So the answer in scientific notation is 12.1 × 10^-4.
Therefore, the correct option is D. 1.21 x 10^-4.
To multiply numbers in scientific notation, you need to multiply the coefficients (the decimal numbers) and add the exponents.
Given:
5.5 × 10^4 multiplied by 2.2 × 10^-8
Step 1: Multiply the coefficients (decimal numbers):
5.5 × 2.2 = 12.1
Step 2: Add the exponents:
10^4 × 10^-8 = 10^(4 - 8) = 10^-4
Putting it together, the answer is 12.1 × 10^-4. In scientific notation, this is written as 1.21 × 10^-3.
So, the correct answer is A. 1.21 x 10^-3.