R (x) = 150 (x2 + 1) gives the monthly revenue in millions x months after an ad campaign. In how many months will the revenue be 30 million?

Step-by-step explanation:

R (x) = 150 (x^2 + 1) gives the monthly revenue in millions x months after an ad campaign. To determine the number of months that it will take for the revenue to be 30 million, we will substitute 30 million for R (x). It becomes

30000000 = 150 (x^2 + 1)

(x^2 + 1) = 30000000/150 = 200000

x^2 = 200000 - 1 = 199999

Taking square root of both sides of the equation, it becomes

x = √199999 = 447.2

Approximately 447 months