Asap 80 points !

there are 975 birds in an aviary. each month, the number of birds decreases by 7%. there are 350 trees in the aviary. each month, 7 trees are removed.

part a: write functions to represent the number of birds and the number of trees in the aviary throughout the months. (4 points)

part b: how many birds are in the aviary after 12 months? how many trees are in the aviary after the same number of months? (2 points)

part c: after approximately how many months is the number of birds and the number of trees the same? justify your answer mathematically. (4 points)

Part A

months = m

 since birds decrease by 7%, there will be 93% left. 93% = 0.93
birds: 975 x 0.93^m
trees: 350 - 7m

Part B
birds: 975 x 0.93^12 = 408
trees: 350-7(12) = 266

Part C

350 - 7m = 0.93^m(975)

We have intersection points at approximately 22.21 and 44.4781. round off to whole numbers, we have 22 and 44 months.

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional