Answer:
C≈62.83
Step-by-step explanation:
To calculate the circumference of a circle, multiply the diameter of the circle with π (pi). The circumference can also be calculated by multiplying 2×radius with pi (π=3.14).
total points 
each person scores $6$ points,
you can see all the multiples of 6 to see if you get 42
or you can just divide 42 by 6, to get the number of people.
$\frac{42}6=7$
Answer:

Step-by-step explanation:
1) q=90/180=45/90=...=1/2;
2) the formula of the n-th term of the given sequence is:

3) according to the formula 15th term is:

or ≈0.011.