Instantancous velocity For the following position functions, and make a conjecture about the instantaneous velocity at the 25-28. Slopes of tangent lines For the following functions, make a make a table of average velocities similar to those in Exercises 19-20 table of slopes of secant lines and make a conjecture about the slope of indicated time. 21. s(1) = -16/2 + 80r + 60 at t= 3 %3D 22. s(t) = 20 cos t at t = T/2 23. s(1) = 40 sin 2t at 1 0 %3D 24. s(t) = 20/(1 + 1) at 1 = 0 the tangent line at the indicated point. 25. f(x) = 2r atx = 2 2x2 at x = 2 26. f(x) = 3 cos x at x 77/2 27. f(x) = e at x = 0 %3D 28. f(x) = x - x at x = 1