Answer:
Step-by-step explanation:
Answer:
= 0.05P - 150
Step-by-step explanation:
Let P(t) be the balance of the loan at time t years,
Let P(t) will satisfy 
where r = annual interest rate
R = per year payment rate
R = $150/year
r =
= 0.05 
Now we have the following picture,
Interest Balance Payment
5% ⇒ P(t) ⇒ $150/year
(0.05)
Therefore, a linear ODE satisfied by P(t) is given by
= 0.05P - 150
He tells us that the 4 daughters have a brother, so, since they belong to the same family, the sisters are the same because they have only one brother.
Answering our question:
or Mr. Smith has 4 daughters and also 1 son.