At present the number of bacteria in a certain culture doubles every hour. If there were 60 bacteria present in the culture initially, how many bacteria will be present at the end of 6 hour?

Joseph invests ₱3,500 at a rate of 8% interest compounded annually. How much is the investment worth after 3 years?

The value of a new branded cellphone is ₱38,000. If the value of the branded cellphone decreases 10% per year, what will be the value of the branded cellphone after 5 years?

You decide to buy an old jeepney that costs ₱ 25,000. You’ve heard that the Jeepney may depreciate at a rate of 8% per year. What will the jeepney be value in 5 years?

Suppose that a Senior High School graduating class had 400 students graduating the first year, but after that, the number of students graduating declines by a certain percentage. If the number of students graduating will be 300 in 2 years, what is the decay rate?