Is the earth approximately three light years away from the sun?

Which units ate used to measure both velocity and speed? check all that apply

Which of the following is the best definition for the process of photosynthesis? a.) plants digest sugars to make energy. b.) plants use oxygen and glucose to make carbon dioxide. c.) plants use sunlight and carbon dioxide to make sugars. d.) plants use sunlight to make chlorophyll and chloroplasts.

Awave has a wavelength of 15 mm and a frequency of 6 hertz. what is its speed?