# Calculus

posted by
**Anonymous**
.

Four hundred students attended the dedication ceremony of a new building on a college campus. The president of the traditionally female college announced a new expansion program which included plans to make the college coeducational. The number of students who learned of the new program t hr later is given by the function below.

f(t) = 4000/(1+B e^(-k t))

If 800 students on campus had heard about the new program 2 hr after the ceremony, how many students had heard about the policy after 4 hr?

students

How fast was the news spreading after 4 hr?

students/hr