Question

Light travels at a constant speed of 3.0 x 105km/s. The distance between the Sun and the Earth is about 1.5 x 108km. Use the distance = speed x time formula (d = v t) to calculate the time it takes light to travel from the Sun to the Earth. Show your work. Express your result in the appropriate number of significant figures

Answer 1

well, it is two sig figures from the data.

time=distance/speed=1.5E8km/3.0E5km/s=.50E3seconds=5.0E2seconds