How are real numbers different from irrational number?

Y=4x^2+x-1 solve using quadratic formula

After t seconds, a ball tossed in the air from the ground level reaches a height of h feet given by the equation h = 144t-16t^2. after how many seconds will the ball hit the ground before rebounding?

    choose the correct definition for  extremo.  a.  end      b.  extra      c.  extract      d.  eventual