The answer is 1/2. 1/5 is equal to 2/10, and 2/10 + 3/10 = 5/10. 5/10 is equal to 1/2 in simpelst form.
WIth the parameterization

we end up with

We also have

So in the line integral, we get


Step-by-step explanation:
Average=total numbers of songs /registered users
Average= 4*10^9/5*10^7
Average=40*10^8/5*10^7
Average=8*10^(8-7)
Average=8*10^(1)
Average=80 songs downloaded per user
Answer:
B
Step-by-step explanation:
The square root of 72 is 8.48528137424 therefore it is more than 8 and less than 9