Ithink i know the answer but i am not sure

which shows how many centimeters are in 3.14203 × 10-4 to three significant figures?

a.
3.14 × 10-1 mm

b.
3.14203 × 10-1 mm

c.
3.10 × 10-1 mm

d.
3.142 × 10-1 mm

Explain in physical terms how a microwave oven works. what would happen when you put a conductor in the microwave oven? explain.

At time t=0, a particle is located at the point (3,6,9). it travels in a straight line to the point (5,2,7), has speed 8 at (3,6,9) and constant acceleration 2i−4j−2k. find an equation for the position vector of the particle.

In the circuit shown below, with each bulb holding a resistance of 60 ohms, how many amps of current are flowing? express your number as a decimal.