multiply 0.75 by 2.8 * 10^-5

Answer 1

To multiply 0.75 by 2.8 * 10^-5, we first need to convert 0.75 to scientific notation:

0.75 = 7.5 * 10^-1

Now we multiply:

(7.5 * 10^-1) * (2.8 * 10^-5)
= 7.5 * 2.8 * 10^(-1 - 5)
= 21 * 10^-6
= 2.1 * 10^-5

Therefore, 0.75 multiplied by 2.8 * 10^-5 is equal to 2.1 * 10^-5.