Need help on this problem which I couldn't find it on my chapter and section for this example

69 Points: 0 of 1 An employee's monthly productivity M, in number of units produced, is found to be a function of the number t of years of service. For a certain product, a productivity function is shown below. Find the maxrmum productlwty and the year in which it is achieved. M(t)= 2t2 +100t+180, osts4o The maximum productivity is achieved in year 25' . The maximum productivity is :1430' units