+ 19 on both sides, -19 becomes 0, 1 becomes 20 x=20
Answer:
157,000,000,000
Step-by-step explanation:
314,000,000 X 500
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
1.0% exactly 0.9743. I hope I helped!