The reflector of a searchlight is in the shape of a paraboloid of revolution. Its diameter is 48 centimeters and its depth is 36 centimeters . How far from the vertex should the light bulb be placed so that the rays will be reflected parallel to the​ axis?

So don't take my word i'm not exactly a mathematical person but i would assume a. because while selling the soap every month you increase in sells so you would by 11 percent. the you would get the factor 0.89 which if i had to guess would be the monthly profit over 11 probably wrong tho