multiply 0.75 b7 2.8 *10^-5
2.1*10^-4
2.1*10^-5
2.1*10^-6
2.1*10^-7
The correct answer is 2.1*10^-4.
To multiply 0.75 x 10^7 x 2.8 x 10^-5, follow these steps:
Step 1: Multiply the numerical values (0.75 x 2.8) to get 2.1.
Step 2: Multiply the powers of 10 (10^7 x 10^-5), which equals 10^2.
Step 3: Write the final answer by combining the numerical value (2.1) with the power of 10 (10^2).
So, the final answer is 2.1 x 10^2.
To multiply these numbers, you can follow these steps:
Step 1: Multiply the coefficients (numbers in front of the powers of 10).
For the given numbers, 0.75 * 2.8 * 2.1 = 3.99.
Step 2: Multiply the powers of 10.
For the given numbers, 10^-5 * 10^-4 * 10^-6 * 10^-7 = 10^(-5-4-6-7) = 10^-22.
Step 3: Combine the coefficient and the power of 10.
Multiplying 3.99 and 10^-22 gives 3.99 * 10^-22.
So, the final answer is 3.99 * 10^-22.