Q9c (10 pts) Solve the problem.Of an initial amount of 7000…

Q9c (10 pts) Solve the problem.Of an initial amount of 7000 gram of lead-210, how much will remain in 100 years? lead-210 decayes at a rate of 3.15%.     ( Round your answer to the nearest one decimal place as needed)                                                                                                                                                                                                                                                           

Q15c  (7 pts) Mary’s Taxi Services purchases a sedan and est…

Q15c  (7 pts) Mary’s Taxi Services purchases a sedan and estimates that its salvage value V(t), in dollars, after t years, is given by         V(t)= 32,500e-0.13t a) What did the sedan cost originally? b) What is the salvage value after 4 years? c) Find the rate of change of the salvage value after 4 years, and explain its meaning.    ( Round all your answers to the nearest whole number)                                                  

Q15a (7 pts) Will’s Taxi Services purchases a sedan and est…

Q15a (7 pts) Will’s Taxi Services purchases a sedan and estimates that its salvage value V(t), in dollars, after t years, is given by           V(t)= 23,500e-0.12t a) What did the sedan cost originally? b) What is the salvage value after 4 years? c) Find the rate of change of the salvage value after 4 years, and explain its meaning. ( Round all your answers to the nearest whole number)                                                                                       

Q6a ( 5 pts)   Differentiate                              …

Q6a ( 5 pts)   Differentiate                                                                                                                                                                                                         

Q16d ( 5 pts) Solve the problem. A radioactive substance has…

Q16d ( 5 pts) Solve the problem. A radioactive substance has a half-life of 35 years. What is the decay rate? ( Round your final answer to the nearest two decimal places)