Help me with this

Question

The speed of light is approximately 3×10^5 kilometers per second. The average distance is 7.8x10^8. How long does it take sunlight to reach Jupiter? Write your answer in scientific notation and in standard form.

Answer 1

rate x time = distance

time = distance/rate

time = 7.8x10^8 km/3×10^5 kilometers per second = 2.6 x 10^3 sec

I assume units of distance are km. Unit omitted from question.