Write a scientific notation for .0042
My answer is 4.2 10^-3
correct
To write a number in scientific notation, you can follow these steps:
Step 1: Determine the coefficient
The coefficient is the first part of the scientific notation and should be between 1 and 10. In this case, the coefficient is 4.2.
Step 2: Determine the exponent
The exponent represents the power of 10, which determines the scale factor of the number. You need to count the number of decimal places that you moved to the right or left to form the coefficient. In this case, you moved the decimal point four places to the right to form 4.2. Therefore, the exponent is -4.
Step 3: Write the scientific notation
Combine the coefficient and exponent. In this case, the scientific notation for 0.0042 is 4.2 x 10^-4.