15. [-/1 Points] DETAILS SCALCET9 2.6.014. MY NOTES ASK YOUR TEACHER Evaluate the limit using the appropriate properties of limits. (If the limit is infinite, enter 'co' or '-co', as appropriate. If the limit does not otherwise exist, enter DNE.) 64x + 7x - 4 lim 6- 3x + x 16. [-/1 Points] DETAILS SCALCET9 2.6.017. MY NOTES ASK YOUR TEACHER Find the limit. (If the limit is infinite, enter 'co' or '-co', as appropriate. If the limit does not otherwise exist, enter DNE.) lim 2t 2 + t t- -00 t - 8t + 1 17. [-/1 Points] DETAILS SCALCET9 2.6.032. MY NOTES ASK YOUR TEACHER Find the limit. (If the limit is infinite, enter 'co' or '-co', as appropriate. If the limit does not otherwise exist, enter DNE.) lim Vx + x) x -+00 18. [-/1 Points] DETAILS SCALCET9 2.6.050. MY NOTES ASK YOUR TEACHER Find the horizontal and vertical asymptotes of the curve. You may want to use a graphing calculator (or computer) to check your work by graphing the curve and estimating the asymptotes. (Enter your answers as comma-separated lists. If an answer does not exist, enter DNE.) y = 2+x4 x 2 - x4 X 19. [-/1 Points] DETAILS SCALCET9 2.7.005. MY NOTES ASK YOUR TEACHER Find an equation of the tangent line to the curve at the given point. y = 3x - 11x + 1, (4, 5) y =