This is a quiz and im timed! Which inequality is true?

(Sorry if it’s a little blurry)

Find the value of the variable and the length of each secant segment.

The average number of vehicles waiting in line to enter a parking lot can be modeled by the function f left parenthesis x right x squared over 2 left parenthesis 1 minus x right parenthesis endfraction , where x is a number between 0 and 1 known as the traffic intensity. find the rate of change of the number of vehicles waiting with respect to the traffic intensity for the intensities (a) xequals0.3 and (b) xequals0.6.

If x is 6, then 7x= a. 13 b. 42 c. 42x d. 76