Answer:
t = 4.5
Step-by-step explanation:
1.8 = 0.4(t) solve for t
N = 14348907
81^5 = 3486784401
3486784401/243 = 14348907
Double Check
3486784401 / 14348907=243
So N = 14348907.
y=-x/5 =3/5. that is how it is.