Answer:

Step-by-step explanation:
Answer:
c
Step-by-step explanation: all you have to do is work it out
5 students. 15 + 30 is 45, so the remainder is 5
Answer:
The second term:
c(2) = 30
Step-by-step explanation:
c(n) = c(n - 1) + 10
c(1) =20
c(2) = c(1) + 10 = 20 + 10 = 30
Answer:
60+4.5pi
Step-by-step explanation:
6×10 obv + area of circle pi(r^2) and half that for a semi cirxle