Using scientific notation, it is found that:
67 ns =
s
<h3>What is scientific notation?</h3>
A number in scientific notation is given by:

With the base being
.
In this problem, the amount is of 67 ns.
Each ns has
seconds, hence:

We want the base between 1 and 10(exclusive), hence, we move the decimal digit one digit to the left and add one to the exponent, and the representation is:
67 ns =
s
You can learn more about scientific notation at brainly.com/question/16394306
For number 2 it's would be 12.8
Sorry I don't have time for number 3
About 10 songs because if you add up all ten numbers of all the songs then you divide, then you divide again you will get 10 songs
Answer:
288 is your answer. Your welcome
700 + 9 + .1 + .04
Hope this helps that the answer