Solve the problem. Express the answer in scientific notation to two decimals unless requested otherwise.
-If the speed of light is $3.00 \times 10 ^ { 8 } \mathrm {~m} / \mathrm { sec }$, how long does it take light to travel $2.29 \times 1011 \mathrm {~m}$, the distance from the sun to Mars?
A) $7.6 \times 10 ^ { 3 } \mathrm { sec }$
B) $7.6 \times 10 ^ { 2 } \mathrm { sec }$
C) $7.6 \times 10 ^ { 2 } \mathrm {~min}$
D) $76 \mathrm { sec }$

Question

Quizplus · Accepted Answer

To find the time, divide the distance by the speed of light: $ \frac{2.29 \times 10^{11} \text{ m}}{3.00 \times 10^8 \text{ m/s}} = 7.63 \times 10^2 \text{ s} $, which rounds to $7.6 \times 10^2 \text{ s}$.

Solve the Problem 3.00×108 m/sec3.00 \times 10 ^ { 8 } \mathrm {~m} / \mathrm { sec }3.00×108 m/sec

Solve the Problem $3.00 \times 10 ^ { 8 } \mathrm {~m} / \mathrm { sec }$