35. The function x(t) = at - bt models the position of a particle on the X-axis at time t. For what values of r is the particle at rest? A. t = 0 and t = - B. t= 0 C. 1 = 75 t = E. t = ab 36. Bocky Rolboa finishes his morning jog strong by sprinting up the steps to the entrance of a national monument at 20 ft/sec. If the steps are angled 30 degrees above the horizontal, what is the rate at which his elevation is increasing? A. 14 fu/sec B. 8 ft/sec C. 12 fu/sec D. 16 ft/sec E. 10 ft/sec