Question

The average distance from the Sun to the Earth is 1.5 × 10^11 meters and the speed of light is 3 × 10^8. If distance = rate times time, how many seconds on average does it take for the Sun's light to reach Earth?

Answer 1

It takes 0.5 * 10³ seconds.

Explanation:

D(distance) = R(rate/speed) * T(time)

T = D/R

D = 1.5 * 10¹¹

R = 3 * 10⁸

D/R = 1.5 * 10¹¹ / 3 * 10⁸ = (1.5 / 3) * 10⁽¹¹⁻⁸⁾ = 0.5 * 10³