Question

multiply 0.75 by 2.8 x 10^-5

A. 2.1 x 10^-6
B. 2.1 x 10^-5
C. 2.1 x 10^-7
D. 2.1 x 10^-4

Answer 1

To multiply \( 0.75 \) by \( 2.8 \times 10^{-5} \):

1. First, multiply the decimal numbers:
\[
0.75 \times 2.8 = 2.1
\]

2. Now, multiply by the power of ten:
\[
2.1 \times 10^{-5}
\]

So, the result is:
\[
2.1 \times 10^{-5}
\]

The correct answer is **B. \( 2.1 \times 10^{-5} \)**.