Tiana is a chemist who is making a chemical to add to swimming pools in order to make the water safer. She mixed two solids

Maria wants to determine which type of disinfectant kills the most bacteria. which of the following is the best way for maria to determine this? a. ask ten different companies that make disinfectants which type is best. b. put the same amount and species of bacteria on ten identical plates, and add ten different kinds of disinfectant to each plate. c. interview ten different people to determine which type of disinfectant they prefer. d. put the same amount and species of bacteria on ten identical plates, and add a different disinfectant to each plate.

How far is the region from the equator or control climate

I’m an electrically neutral atomic any element, there are equal numbers of