SOLUTION: Often sales of a new product grow rapidly at first and then level off with time. This is the case with sales represented by the function S(t)=600-200t^-2, where t represents time i

Question 1020948: Often sales of a new product grow rapidly at first and then level off with time. This is the case with sales represented by the function S(t)=600-200t^-2, where t represents time in years. Find the rate of change of sales for the following number of years.
1. 2 years
2. 7 years
I thought I just replace t in the equation with the respective years but apparently that�s wrong?

Answer by Cromlix(4381) (Show Source): You can put this solution on YOUR website!
Hi there,
S(t) = 600 - 200t^-2
2 years
S(t) = 600 - 200 x 2^-2
S(t) = 550
7 years
S(t) = 600 - 200 t^-2
S(t) = 600 - 200 x 7^-2
S(t) = 595.9 (1 decimal place)
2^-2 = 1/4
7^-2 = 1/49
Hope this helps :-)
RELATED QUESTIONS
A person is the manager of a firm. He is considering manufacturing a new product,... (answered by stanbon)

Axia College Material Appendix F Ticket Sales Living in or near a metropolitan... (answered by stanbon)

Hello all! CelebNav, Inc. had sales last year of $600,000 and the analysts are... (answered by septimus99)
This applet carries out tests at a fixed significance level. When you arrive, the... (answered by ikleyn)
find the sales price of a DVD that originally cost $26.99 and is on sale for 25% off,... (answered by richwmiller)
CelebNav, Inc. had sales last year of $565,000, and the analysts are predicting a good... (answered by jorel1380)
Ticket Sales Living in or by a metropolitan area has certain advantages. Entertainment (answered by richard1234)
I need help with this I am also looking for a paid tutor anyone intrested? 1. In this... (answered by stanbon)
Can you help, please. I have been working on this for a long time. Write an equation... (answered by macston)