If a/c = 2, what is the value of 4b/a?

On an airplane there are two seats on the left side and three seats on the right side there are 90 seats o the right side of the plane

Astudent simplified a rational expression as shown.

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