Evaluate the following expressions. exact real number answers are required for each problem. when one of them does not evaluate to a real number, type undefined in its answer box. also, if you try to enter the calculation into webwork for an undefined process, webwork will not give you credit. pay attention to how placing parentheses, shifting the location of a negative sign, or changing an operation can change the result of the calculations.

Apark is in the shape of a rectangle. the park authorities are planning to build a 2-meter-wide jogging path in the park (shown as the shaded region in the image). what is the area of the jogging path? plz

You drop a rubber ball off the roof of a 50 meter high building onto a paved parking lot. it bounces back up with every bounce, but not quite all the way back up to you. after the first bounce it bounces back only 80 percent of the distance it was dropped from. the pattern continues, meaning after every bounce it comes up to just 80 percent of the previous maximum height. so if before the first bounce the height is 50 meters, what height does the ball reach after the fifth bounce? round your answer to one decimal place and chose the correct response from the choices below:

Through non-collinear points there is exactly one plane.