PLEASE HELP NO LINKS OR RANDOM WORDS!! What is a "waxing" moon?

-An increase in the visible part of the moon as the days progress
-A decrease in the visible part of the moon as the days progress
-Another name for full moon
-Another name for new moon

Write the correct abbreviation for each metric unit

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

Aresistor with an unknown resistance is connected in parallel to a 9 ω resistor. when both resistors are connected in parallel to an emf source of 21 v, the current through the unknown resistor is measured with an ammeter to be 4 a. what is the resistance of the unknown resistor? answer in units of ω.