Perform the indicated calculation. Express your answer using scientific notation.
-$\left( 1.9 \times 10 ^ { - 7 } \right) \left( 1.6 \times 10 ^ { - 4 } \right)$
A) $3.04 \times 10 ^ { 11 }$
B) $3.04 \times 10 ^ { - 11 }$
C) $3.5 \times 10 ^ { 11 }$
D) $3.04 \times 10 ^ { 3 }$

Question

Quizplus · Accepted Answer

To multiply numbers in scientific notation, multiply the coefficients and add the exponents.

\begin{align*}
\left( 1.9 	imes 10 ^ { - 7 } ight) \left( 1.6 	imes 10 ^ { - 4 } ight) &= (1.9 \cdot 1.6) 	imes 10^{(-7 - 4)} \
&= 3.04 	imes 10^{-11}
\end{align*}

Therefore, the answer is choice B.

Perform the Indicated Calculation (1.9×10−7)(1.6×10−4)\left( 1.9 \times 10 ^ { - 7 } \right) \left( 1.6 \times 10 ^ { - 4 } \right)(1.9×10−7)(1.6×10−4)

Perform the Indicated Calculation $\left( 1.9 \times 10 ^ { - 7 } \right) \left( 1.6 \times 10 ^ { - 4 } \right)$