Question

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

Answer 1

To subtract numbers in scientific notation, the exponents must be the same. Let's rewrite both numbers with the same exponent:

4.8 x 10^-3 - 9.4 x 10^-6 = 4.8 x 10^-3 - 0.0094 x 10^-3

Now, subtracting the numbers:

4.8 x 10^-3 - 0.0094 x 10^-3 = (4.8 - 0.0094) x 10^-3 = 4.7906 x 10^-3

Rounding to two decimal places:

4.7906 x 10^-3 ≈ 4.79 x 10^-3

Therefore, the answer is 4.79 x 10^-3 in scientific notation, rounded to two decimal places.