Multiply. Give the answer in scientific notation. $\left( 8.1 \times 10 ^ { 5 } \right) \left( 1.7 \times 10 ^ { 6 } \right)$
A) $1.343 \times 10 ^ { 12 }$
B) $1.394 \times 10 ^ { 12 }$
C) $1.377 \times 10 ^ { 12 }$
D) $1.377 \times 10 ^ { 11 }$
E) $1.343 \times 10 ^ { 11 }$

Question

Quizplus · Accepted Answer

To multiply two numbers written in scientific notation, we multiply their coefficients and add their exponents. 
$$ \left( 8.1 \times 10 ^ { 5 } \right) \left( 1.7 \times 10 ^ { 6 } \right) = (8.1 \cdot 1.7) \times 10 ^ { 5+6 } = 13.77 \times 10 ^ { 11 } = 1.377 \times 10 ^ { 12 } $$
Therefore, the answer is choice C.

Multiply Give the Answer in Scientific Notation (8.1×105)(1.7×106)\left( 8.1 \times 10 ^ { 5 } \right) \left( 1.7 \times 10 ^ { 6 } \right)(8.1×105)(1.7×106)

Multiply Give the Answer in Scientific Notation $\left( 8.1 \times 10 ^ { 5 } \right) \left( 1.7 \times 10 ^ { 6 } \right)$