If the domain of the square root function f(x) is x 57, which statement must be true?

The parabola opens: y=√x-4 (principal square root) up down right left

The manufacturer of a new product developed the following expression to predict the monthly profit, in thousands of dollars, from sales of the productwhen it is sold at a unit price of x dollars.-0.5x^2 + 22x - 224what is represented by the zero(s) of the expression? a.the profit when the unit price is equal to 0b.the unit price(s) when the profit is equal to 0c.the profit when the unit price is greatestd.the unit price(s) when profit is greatest

Given the equation f(x)=a(b)x where the initial value is 40 and the growth rate is 20% what is f(4)