Question

(a) Sociologists have found that information spreads among a population at an exponential rate.
Suppose that the function y=525(1-e^(-0.038t) ) models the number of people in a town of 525 people who have heard news within t hours of its distribution.
How many people will have heard about the opening of a new grocery store within 24 hours of the announcement? [2 marks]
When will 90% of the people have heard about the grocery store opening? [4 marks]

Answer 1

Hey there !
you can tag people like this @iambatman to get their attention to your question.

Answer 2

@mathstudent55 can you please help here ?

Answer 3

@Loser66

Answer 4

You'll probably have to wait, looks like they are busy at the moment.

Answer 5

D; urg okay

Answer 6

Oh, is it a test ?

Answer 7

just put t= 24 into the expression to get the answer

Answer 8

the last part said that 90% people heard , then take 90% of the previous answer, let it as y2 , put the expression into form y2 = ...........(t2) ,solve for t2

Answer 9

thanks ....but what about e...i dont know how to deal with it

Answer 10

Check this out
http://www.mathsisfun.com/numbers/e-eulers-number.html

Answer 11

thx