Question

The monthly sale (in thousands of units) for the tth month after the introduction of a product in the market is given by S = 135t/(t2 + 50). In which earliest month would the sale (S) have been 9?

Answer 1

Answer: 3rd month

Explanation:

S = 135t/(t2 + 50)

9=135t/(2t + 50)

9(2t+50)=135t

18t+450=135t

450=117t

t=3.85 ==> t=3rd month