I need help converting units

Question

The distance from a planet to its sun is approximately 100 million kilometers. If the speed of light is 3.00 times 10 Superscript 5 km/sec, how long does it take light from the sun to reach the planet? If a solar flare occurs right now, how long would it take before it would be visible on the planet? Round your answer to the nearest second.

Answer 1

d = 100 x 10⁶ = 10⁸ km

c = 3 x 10⁵ km/s

d = vt or t = d/v

t = 10⁸/(3x10⁵) = 3.33 x 10² seconds