Solve the problem. Express the answer in scientific notation to two decimals unless requested otherwise.
-A light-year is the distance that light travels in one year. Find the number of miles in a light-year if light travels $1.86 \times 10 ^ { 5 } \mathrm { miles } / \mathrm { second }$.
A) $5.87 \times 1012$ miles
B) $5.87 \times 10 ^ { 7 }$ miles
C) $5.87 \times 10 ^ { 14 }$ miles
D) $5.87 \times 10 ^ { 5 }$ miles

Question

Quizplus · Accepted Answer

To find the number of miles in a light-year, multiply the speed of light by the number of seconds in a year: $1.86 \times 10^5 \text{ miles/second} \times 60 \times 60 \times 24 \times 365 \approx 5.87 \times 10^{12} \text{ miles}$.

Solve the Problem 1.86×105miles/second1.86 \times 10 ^ { 5 } \mathrm { miles } / \mathrm { second }1.86×105miles/second

Solve the Problem $1.86 \times 10 ^ { 5 } \mathrm { miles } / \mathrm { second }$