Work out the height of a triangle with base b= 7.7mm and area a=164.78mm2

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

65% of students in your school participate in at least one after school activity. if there are 980 students in you school, how many do not participate in an after school activity?

(60 points) explain this in detail