The magnetic coils of a tokamak fusion reactor are in the shape of a toroid having an inner radius of 0.491 m and outer radius of 0.762 m. The toroid has 691 turns turns of wire, each of which carries a current of 8.66 kA. Find the magnetic field strength along the inner radius.

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.)