The number of friends represents how many had the type of ice cream. It is the number of friends.
Answer: 
Step-by-step explanation:
Given: Fraction of goal raised on first day = 
Fraction of goal raised after second day = 
Now , Fraction of goal raised on second day = Fraction of goal raised after second day - Fraction of goal raised on first day

Required fraction =
The equations are y=3x-1 and y=-3x+5
I’ll try to solve it in the comments if you still have time
Answer:
The probability is 3/95
Step-by-step explanation:
The probability that you will pick two pennies is
4
20
×
3
19
=
12
380
=
3
95
Answer:
64.5%
Step-by-step explanation:
Initial amount N° = ?
Remaining amount after decay = N = ?
k = decay constant = 0.00012 
t = time = 3650 year
fraction remaining will be N/N°
From the decay equation, N = N°
N/N° = 
N/N° = 
N/N° = 
N/N° = 0.645 = 64.5%