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 1.55 ⋅ 107 seconds? (5 points) part b: which is the more reasonable measurement of the distance between the tracks on a cd: 1.6 ⋅ 10−3 mm or 1.6 ⋅ 103 mm? justify your answer. (5 points)

answer: .75 km

step-by-step explanation:

1 x=22.52

2: 65/39=604+39x

65x-39x=604

26x=604

x=604/26

×=23.23

k

step-by-step explanation:

domit

let x and 400 - x be the two numbers.  

==> 0.80x + 0.85(400 - x) = 400 - 68 from the statement of the problem.  

< ==> 0.80x + 0.85(400 - x) = 400 - 68  

==> 340 - 0.05x = 332  

< ==> -0.05x = -8 ==> x = 160, the first number ==> 400 - x = 240, the second number.