if you know the earth's orbital diameter and can measure the difference in eclipse times for Jupiter's moon, Io, you can calculate the speed of light. If an eclipse of Io occurred 24 min later than expected and Earth's orbital diameter is 3.0 x 10¹¹m, what is the calculated speed of light using this data?

a) 1.3 x 10¹⁰m/s

b) 3.0 x 10⁹m/s

c) 3.5 x 10⁶m/s

d) 2.1 x 10⁸m/s