Is 600 km less, more, or equal to 5 m

Using the quadratic formula find the zeros of the given polynomial -5x^2+3x-11

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

Can someone tell me if this is perpendicular? !