Guys please help me with this question, I’d appreciate it a lot

Write a function that matches the description. a cosine function has a maximum of 5 and a minimum value of -5. f (r) =

Adriana sold 50 shares of a company’s stock through a broker. the price per share on that day was $22.98. the broker charged her a 0.75% commission. what was adriana’s real return after deducting the broker’s commission? a. $8.62 b. $229.80 c. $1,140.38 d. $1,149.00

Don't know how to find x given these segment lengths