Justin used a container shaped like a cylinder for his dog's food. The dimensions of the container are shown below. Find the volume of the container in cubic inches. Write your answer in terms of n​

Question and answers are in the attached picture. you so much in advance.

The table below shows the height of a ball  x  seconds after being kicked.  what values, rounded to the nearest whole number, complete the quadratic regression equation that models the data? f(x)  =  x2  +  x  +  0based on the regression equation and rounded to the nearest whole number, what is the estimated height after 0.25 seconds?   feet

[10 points, algebra 2-simplifying complex fractions]according to my answer key the restrictions are -1 and 4. but why not positive 1?