Write a differential equation that models the given situation. The stated rate of change is with respect to time t. (Use k for t
he proportionality constant.) When an advertising campaign for a new product is introduced into a city of fixed population N, the rate of change of the number y of individuals who have heard about the product at time t is proportional to the number of individuals in the population who have not yet heard about the product.
The differential equation that models the given situation will be dy/dt = K(N - y).
<h3>How to compute the equation?</h3>
Let y = number of individuals who have heard about the product.
Let N - y = this who haven't heard about the product.
From the given statement, the rate for change will be t = dy/dt. Therefore, the differential equation that models the given situation will be dy/dt = K(N - y).
X^2+15^2=25^2 X^2+225=625 Isolate X X^2=400 Take the square root on both sides X=positive and negative 20 but in this case the negative is thrown out because you can't have a negative side Answer: 20
