Calculate 4.8×10^−3−9.4×10^−6 . Express the answer in scientific notation rounding to 2 decimal places

Answer 1

To perform the subtraction, we need to convert the numbers to the same decimal place.

First, convert 4.8×10^−3 and 9.4×10^−6 to the same exponent:

4.8×10^−3 can be represented as 480×10^-6,
and 9.4×10^−6 stays the same.

Now, subtract 480×10^-6 and 9.4×10^−6:

480×10^-6 - 9.4×10^−6 = 470.6×10^-6

Finally, express the answer in scientific notation and round to 2 decimal places:

470.6×10^-6 = 4.71×10^-4