Answer:
20
Step-by-step explanation:

it's 0 years after so f(0)
Answer:
260
Step-by-step explanation:
There are a few ways to solve this, but an easy to understand one is that 39=15%, therefore 13=5%, as it is taking 1/3 of each number. Then to get to 100% we would need to multiply 13=5% by 20 to get 260=100%
Answer:
x=k/4+c/4
Step-by-step explanation:
4x-c=k
4x=k+c
x=k/4+c/4
Answer:
Step-by-step explanation:
1/2 (n^3 - 1)
the difference means subtract