If the Total Revenue Function for a Blender Is $R ( x ) = 35 x - 0.25 x ^ { 2 },$

Multiple Choice

If the total revenue function for a blender is $R ( x ) = 35 x - 0.25 x ^ { 2 },$ determine how many units x must be sold to provide the maximum total revenue in dollars.

A) 1225
B) 3000
C) 35
D) 200
E) 70