An artist creates a right prism whose bases are regular pentagons. He wants to paint the lateral surfaces of the prism. One can of paint can cover 30 ft2. How many cans of paint must he buy if the height of the prism is 15 ft and the length of each side of the pentagon is 5 ft?

Ascientist is investigating the effects of salinity on fish development. he places fertilized fish eggs in an aquarium that contains low salinity and observes their development. what factor would improve experimental design the most? place the fish eggs in the open ocean because that is the natural habitat include another aquarium that has normal salinity to compare to the low salinity aquarium include an aquarium that replaces salt with sugar to confirm that the effects are specific to salt grow algae with the fish eggs in order to provide adequate nutrients to the developing embryos