Which of the following is a true statement?
a. in a generator, electrical energy is converted into the energy of motion.
b. in a motor, the energy of motion is converted into electrical energy.
c. in a generator, a current-carrying wire spins a magnet around an iron core.
d. in a motor, a current carrying coil spins inside a stationary magnet.

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.)