multiply 0.75 by 2.8× 10 exponent -5

Answer 1

To multiply \( 0.75 \) by \( 2.8 \times 10^{-5} \), you can simply multiply the decimal and the coefficient separately:

\[ 0.75 \times 2.8 = 2.1 \]

Now, attach the \( 10^{-5} \):

\[ 2.1 \times 10^{-5} \]

Therefore, \( 0.75 \times 2.8 \times 10^{-5} = 2.1 \times 10^{-5} \).