5 boys play both hockey and volleyball (30-20-15=5)
SOLUTION
We have been given the equation of the decay as

So we are looking for the time
Plugging the values into the equation, we have

Taking Ln of both sides, we have

Hence the answer is 4308 to the nearest year
That would be 8. first parenthesis, then multiply, then subtract.
Your answer is f(y) > 0
A is your answer
Use the diameter if their is no radius.