for P(t) = 65- 5t
domain is [0, 13]
because intially at t = 0 total puppy available is 65 (put t = 0 in equation)
now after 13 days
P(t) = 65 - 5×13 = 65-65 = 0
no puppy available. so t has last range of 13.
similarly for second its domain is [0, ∞]
as subscribers will increase as t will increase.
for 3rd
C(t) = 65 + 5t
here t is guest so . they can only accomdate 30 guests only so t csn go to 30 only.
so domain is [0,30]
