Topic 6: Scientific Notation

Try the problem below. After you try the problem, you can watch a video to see a correct solution.
Express the product of \(\left({ 3 \times 10^{-2} }\right)\left( { 4 \times 10 ^ 5 }\right)\) in scientific notation.
A
\(\displaystyle{12.0\times 10^3}\)
B
\(\displaystyle{1.2\times 10^{-10}}\)
C
\(\displaystyle{12\times 10^{-10}}\)
D
\(\displaystyle{1.2\times 10^{2}}\)
E
\(\displaystyle{1.2\times 10^4}\)
Proportions
Proportions

After watching the video, try this problem to practice more.

Proportions
Proportions
Express the product of \(2\times 10^7\) and \(9\times 10^{-3}\) in scientific notation.
A
\(\displaystyle{18\times 10^{4}}\)
B
\(\displaystyle{18\times 10^{-21}}\)
C
\(\displaystyle{1.8\times 10^{-21}}\)
D
\(\displaystyle{1.8\times 10^{5}}\)
E
\(\displaystyle{1.8\times 10^{4}}\)