Q 1 Estimate f (42) from the following data using Newton backward interpolation x: 20 25 30 35 40 45 f(x): 354 332 291 260 231 204

Please see the attached image and answer the green multiple choice questions, poll 3 and 4!!!

An observer tracks the distance a plane has rolled along the runway after touching down. The figure shows this distance, x, in thousands of feet, as a function of time, t, a (1000s of ft) 6 5 4 3 in seconds since touchdown. Find the 2 average velocity, in feet per second, of the plane over the following intervals: 1 10 20 30 40 NOTE: Round your answers to the nearest 10 feet per second. Time (seconds) (a) Average velocity, in ft/sec, from t = 0 to t = 20: (b) Average velocity, in ft/sec, from t = 20 to t = 40:

F H G