OpenStudy (anonymous):

Which of the following best represents the speed of Halley's comet when it is nearest to Earth? 1 × 10^5 kilometers per year 1 × 10^5 kilometers per hour 1 × 10^-5 kilometers per hour 1 × 10^-5 kilometers per year

OpenStudy (anonymous):

B.) 1 x 10^5 kilometers per hour :)

OpenStudy (anonymous):

thanks