Solve: (6.825 x 10-3) x (1.2 x 10-8)

Which mantle is under the crust the upper mantle or the lower mantle i think it's upper let me know if i'm right

During the day, plants produce by splitting water molecules in the light-dependent reactions of photosynthesis. at the same time, plants use cellular respiration to produce some of the needed by the light-independent reactions to make sugars. during the night, plants produce because takes place.

What’s the student’s scientific question