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 $1.86 \times 10^{5}$ miles/second.
A) $5.87 \times 10^{7}$ miles
B) $5.87 \times 10^{5}$ miles
C) $5.87 \times 10^{12}$ miles
D) $5.87 \times 10^{14}$ 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 1.86×1051.86 \times 10^{5}1.86×105 Miles/second 5.87×1075.87 \times 10^{7}5.87×107 Miles B) 5.87×1055.87 \times 10^{5}5.87×105

Solve the Problem $1.86 \times 10^{5}$ Miles/second $5.87 \times 10^{7}$ Miles
B) $5.87 \times 10^{5}$