Which of the following savings vehicles usually requires a high minimum balance?

When using two-wire cable to feed a 240-v appliance that does not require a neutral wire, you should a. mark both ends of the white wire green. b. use the cable as is. c. use only the black wire. d. mark both ends and any exposed area of the white wire black.

Need in all of themmm only answer if you know pls

Determine the maximum r-value of the polar equation r =3+3 cos 0