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.

Part A) The sun produces ergs of radiant energy per second. How many ergs of radiant energy does the sun produce in seconds?

by using proportion

therefore

the answer Part A) is

Part B) Which is the more reasonable measurement of the distance between the tracks on a CD: or ?

The distance between the tracks on a CD are very small. therefore it would be more reasonable to have a value of

therefore

the answer Part B) is

4

step-by-step explanation:

3

step-by-step explanation:

in standard form:

a= dictionaries

b= maps

you have to buy 3 dictionaries, so put a 3 next to the a (dictionaries) so that you can multiply them by each other.

a3+b= 60 (the amount of money you have)

we already know the cost of a=15 so replace a with $15

($15 x 3)+b=60

multiply 15 and 3 to get $45 and replace it with $45

45+b=60

and then replace b with 15 to get the total:

45+15=60

that means you have $15 left after buying 3 dictionaries.

15 divided by the cost of a map ($5) equals 3.

so you can buy 3 maps.

sorry if it was confusing!