A company has a badly designed product, but a huge advertising budget. The product sells well at when it is first introduced, but sales fall as people switch to a better product from a competitor. Given that the monthly sales S are 210t (t + 5)²' where S is in thousands of dollars and t is in months. After how many months will sales be maximized? S = t>0 Sales he maximized in months

If the amount of drug in a person's blood after t hours is  (t) = t/(t2 + 25), when will the drug concentration be the greatest?

Suppose the usual cost associated with a catered wedding reception is 1,500 php/person for a reception of more than 75 people; while, 1,850 php/person is the usual cost for a reception of 75 people or less. Determine the function C(n) representing the total cost for a catered wedding reception of n people. 1500n if n>75 A C(n) = %3D 1850n if 075 B C(n) = 1850(n- 75) if075 1850 if 075

Sarah pays a flat rate plus a rate per minute for her phone plan as shown in the graph above. The cost of Sarah's phone plan, C(t), can be represented by which of the following functions? A: C(t) = -0.10t+25 B: C(t) = 0.10t+25 C: C(t) = 25(0.10)^t D: C(t) = 25(1+0.10)^t