Blue-green algae belong to the same Linnaean kingdom as bacteria. Which of the following characteristics do these organisms have in common? A. They cause disease. C. They are prokaryotic.
B. They are autotrophs. D. They are multicellular.

Atank has a shape of a cone with a radius at the top of 2 m and a height of 5 m. the tank also has a 1 m spout at the top of the tank. the tank is filled with water up to a height of 2 m. find the work needed to pump all the water out the top of the spout. (use 9.8 m/s2 for g and the fact that the density of water is 1000 kg/m3.)