The questions is provided in the attachment. Need a detailed answer and pls be kind enough to provide the working as well. Thx a lot!

Light from the sun reaches the earth in 8.3 minutes. the velocity is 3.00 x 10^8 m/s. how far is earth from the sun? i know how to get to d = (3 x 10^8 m/s)(498 sec). i just don't know how to get from there to the answer being 1.5 x 10^11 m.

What occurs during a combustion reaction

Compare the horizontal displacement of the two balls as they travel to the ground. what do you observe?