Which situation could be modeled by the function y = 400(1 – 0.17)x? Here are the possible answers, can someone please help me?

A) The population, y, of a city after x years that grows at a rate of 17% every 3 years
B) The amount of medicine in milligrams, y, in a human body that starts with 400 milligrams and
decreases by 17% every hour, x
C) The money, y, in an account that starts with $400 and increases by 17% every year, x
D) The height of a tree, in inches, y, that starts at 400 inches and grows by 17 inches every year, x

Rachel reads 1/5 of the pages of a book plus 12 pages on the first day. on the second day, she reads 1/4 of the remaining pages plus 15 pages. on the third day, she reads 1/3 of the remaining pages plus 18 pages. on the fourth day, she reads the remaining 70 pages. how many total pages are in the book?

You love to play soccer! you make a shot at the net 8 times during a game! of those 8 attempts, you score twice. what percent of the time did you score?

Using pert, adam munson was able to determine that the expected project completion time for the construction of a pleasure yacht is 21 months, and the project variance is 4. a) what is the probability that the project will be completed in 17 months? b) what is the probability that the project will be completed in 20 months? c) what is the probability that the project will be completed in 23 months? d) what is the probability that the project will be completed in 25 months? e) what is the due date that yields a 95% chance of completion?