A firm can produce only 2100 units per month. The monthly total cost is given by C(x) = 300 + 200x dollars, where x is the number produced. If the total revenue is given by R(x) = 250x − 1 100 x2 dollars, how many items, x, should the firm produce for maximum profit?

In a certain pentagon, the interior angles are a, b,c, d,e where a, b,c, d,e are integers strictly less than 180. ("strictly less than 180" means they are "less than and not equal to" 180.) if the median of the interior angles is 61 and there is only one mode, then what are the degree measures of all five angles?

Kelly is a salesperson at a shoe store, where she must sell a pre-set number of pairs of shoes each month. at the end of each work day the number of pairs of shoes that she has left to sell that month is given by the equation s=300-15x , where s is the number of pair of shoes kelly still needs to sell and x is the number of days she has worked that month. what is the meaning of the number 300 in this equation

The sum of 5consecutive even numbers is 100. what is the first number in this sequence?