Answer:
778.688
.........................
Answer:
We know that ,

So ,

we can add 2 pi to it since there will be no change in the value
Also,

Answer : Option B
I think 5?
These are the ages,
12, 12, 14, 15, 17,
28, 29,
40, 41, 44, 45,
50,
69
Only the people on the first row are under 19 and there are 5 people.