First, what is the average speed of the ball during the time interval between t=3.0s and t=6.0s? (Assume that the mouse coordinates are labelled in units of meters. Use the buttons to control the animation. The ghosts are produced at 1 second intervals.) Click the Initialization button to set up the animation and the Start button to start playing the animation.

Work out sian speed for the first 30 minutes of her journey. give your answer in km/h.

What are similarities and differences between refraction, reflection, diffraction and absorption?

The temperature at a point (x, y) is t(x, y), measured in degrees celsius. a bug crawls so that its position after t seconds is given by x = 6 + t , y = 8 + 1 3 t, where x and y are measured in centimeters. the temperature function satisfies tx(3, 9) = 5 and ty(3, 9) = 4. how fast is the temperature rising on the bug's path after 3 seconds? (round your answer to two decimal places.)