Can you please solve all of them please:

1) The population of a pod of Southern right whales has doubled in size recently over a 9 year period. They have a current population of 38 individuals. What might the population be after 25 more years?

2) A bacteria culture doubles every 15 minutes. There were 20 individuals initially. a) How many bacteria will be present after 2 hours? b) How long will it take to grow a population of 163 840?

3) A weight loss program aims for its clients to lost 5% of their weight each week. If Helene currently weighs 280 pounds, what can she expect to weigh at the end of the 12-week program?

4) The population of a developing city increases by 8% per year. In 2005, 125 000 people lived in the city. a) What is the population expected in 2020?

b) In what year should the population reach half a million?

5) The half-life of Carbon-14 is approximately 6000 years. A fossil of Carbon-14 weighed 100 grams. How much would it weigh after 18 000 years?

6) A radioactive isotope decays rapidly with a half-life of 4 minutes. For a 12 minute test, technicians need at least 6 grams of the isotope to remain at the end of the test. How much must they start with?

7) A nuclear power plant has a stockpile of 100 tonnes of radioactive waste. The radioactive waste has a half-life of 15 years. How long will it take for there to be only 1 tonne remaining?

8) If Canada were to stop accepting immigrants the population would begin to decrease by 0.5% per year. Canada's population is currently 34, 482, 779. If it stopped accepting new immigrants today, what would the population be in 50 years?

9) The amount of sunlight a diver can see is halved for every 11 meters she dives. What percentage of light remains when the diver is 60 meters below the surface? (Hint: at the surface is 100% of the light)

10) Lead-210 decays very slowly with a half-life of 180 years. After 1000 years, how much of a 40 kg sample remains?