# Calculus

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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

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