Answer:
f(n) = 2 * f(n - 1) + 1
Step-by-step explanation:
First, notice that the difference between each neighboring term is different, so it is not linear, so we can rule out A and B. Now, it's all about finding a pattern. Eventually, through guess and check, you will get 2 * f(n - 1) + 1.
Perhaps there was a typo in C? Idk!!
10 pens=£6.50
1 pen=£0.65
4 pens=£0.65×4
4 pens=£2.6
Answer:
42.86% and 61.91%
Step-by-step explanation:
90/210=9/21=42.86%
130/210=13/21=61.91%
