Circled questions. Thank you.

In exercises 14-20 give both the exact {without calculator) and approximate [with calculator] answers. radioactive substance decays exponentially. A scientist begins with 150 milligrams of a radioactive substance. Alter 40 hours. 25 mg of the substance remains. How many milligrams will remain alter 00 hours? @A vehicle was valued at $00,000 in the year 2011. The value depreciated to $12,000 by the year 2015. Assume that the car value continues to drop at a constant rate. How long will it take for the car to be valued at $000? @A house was valued at $100,000 in the year 100-0. The value appreciated to $250,000 by the year 2003. What was the annual growth rate between 1000 and 2000'? Assume that the house value continues to grow at the same rate. 1llllhat is the value of the house in the year 2010? @A car purchased for $25,?00 depreciates at a constant rate of 3% each year. How long will it take for the car to be worth $10,000? new homeowner purchases furniture worth $10,000, which depreciates at a constant rate of 2% every 2 years. How many years will it take for the furniture to be valued at $0,000? ' population of 20,000 rabbits has a growth rate of 25% every three years. Determine the population after 0 years. Longhorn High School opens its door in 2005 with 000 students. The school grows 20% every four years. How long will it take for the school to reach 0000 students