According to Kepler's First Law, all planets in our solar system orbit around the Sun in what shape? A. circle
B. sphere
C. ellipse
D. spiral

When a person undergoes root canal treatment or another endodontic treatment: [select all that apply] a.) the inside of the tooth is carefully cleaned and disinfected. b.) air is forced into the canal to stop bleeding. c.) the inflamed/infected pulp is removed. d.) the inside of the tooth is filled and sealed with a rubber-like material called gutta-percha

So i have a lot of answers answered but it says i still need to answer more questions. why is it doing that? how many questions need to be answered?

Mary is 14 year old her resting heart rate is 70 beats per minute. calculate 50% of mary's maximum heart rate to fine her target heart rate