Help don’t know what to do thank you please no file answers they don’t work thank you

What is the area of the trapezoid shown ?

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.

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .