Question

Plz I really need help GIVING OUT 52 POINTS!!!

Part A: The Sun produces 3.9 ⋅ 1033 ergs of radiant energy per second. How many ergs of radiant energy does the Sun produce in 2.45 ⋅ 105 seconds? Express your answer in scientific notation and show your work. (5 points)

Part B: Which is the more reasonable measurement of the distance between the tracks on a DVD:
7.4 ⋅ 10−4 mm or 7.4 ⋅ 104 mm? Justify your answer. (5 points)

Answer 1

7.4 x 10-4mm, I think. Hope this helps! Have a great day!

Answer 2

I think the answer is 7.4 x 10-4mm, because a CD is pretty small.