Calvin read an 18 page chapter in his social studies book in 2 hours if he read the same number of pages each hour how many pages did he read per hour

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

How do i do this activity, is appreciated

Find the domain of the following expression: 1/(√x)-2