Plzzz will give brainlest only if correct part a: the sun produces 3.9 ⋅ 10^33 ergs of radiant energy per second. how many ergs of radiant energy does the sun produce in 3.25 ⋅ 10^3 seconds? part b: which is the more reasonable measurement of the distance between the tracks on a railroad: 1.435 ⋅ 10^−3 mm or 1.435 ⋅ 10^3 mm? justify your answer.

Part a

power = 3.9 \times  {10}^{33} erg \:  {sec}^{ - 1}  

energy \: in \: 3.25 \times  {10}^{3} sec = 3.9 \times  {10}^{33}  \times 3.25 \times  {10}^{3}  = 12.675 \times  {10}^{36}  

part b  

1.435 . 10^3 mm = 1.4m

1.435 . 10^-3 mm = 0.001435m  

so the first one ie 1.4m is more reasonable as tge second one is too small quantity.

Hope it helps.

n=9

step-by-step explanation:

7 times a number = 7n

decreased by 13 = 7n-13

same as is =

5 times the number = 5n

increased by 5 = 5n+5

7n-13 = 5n+5

2n=18

n=9

70

step-by-step explanation: