Which equations model exponential decay?
select each correct answer.

a. y=0.55(0.91)^x

b. y=4.2(1.25)^x

c. y=0.25(2)^x

d. y=2(0.20)^x

6people equally share 56 gummy worms. how many gummy worms does each person get? nine and one sixth gummy worms nine and two sixths gummy worms ten and one sixth gummy worms ten and two eighths gummy worms

Acircular city park has a sidewalk directly through the middle that is 111 - feet long. if each bag of fertilizer covers 50 square feet, then determine how many bags of fertilizers the parks and recreation department needs to use to cover the circular park. ignore all the sidewalks around and through the park.

Ineed if you could explain and give me the answer you! this needs done