What is the area of study in oceanography that uses marine sediments to determine past changes in the ocean environment, such as water temperature or circulation

Astudent conducts an experiment to see how music affects plant growth. the student obtains four identical plants. each one is potted in the same type of soil and receives the same amount of sunlight and water each day. plant a listens to classical music for three hours each day. plant b listens to rock music for three hours each day. plant c listens to country music for three hours each day. plant d does not listen to any music at all. 2. based on the experiment in the scenario, which visual aid would be most in showing the change in the plants' heights over time? a. a pie chart b. a line graph c. a timeline d. a bar graph

Given: circle a externally tangent to circle b. how many possible common tangents to circles a and b can exist? 2 3 4

Hey! can anyone me out with my homework? it will be very much appreciated! and !