(from my calculus quiz) an object is dropped and hits the ground 3 second(s) later. from what height, in feet, was it dropped? i just need an answer so i can solve it tmr on my own !

Groups of organs that work together to complete a process in the body are called: a. cells b. tissues c. nerves d. systems

Utah's great salt lake has an average salinity seven times higher than that of the oceans. very few multicellular organisms live in this harsh environment. an example is the brine shrimp, which must devote a large portion of its metabolic energy to osmoregulation. these brine shrimp must available hint(s)utah's great salt lake has an average salinity seven times higher than that of the oceans. very few multicellular organisms live in this harsh environment. an example is the brine shrimp, which must devote a large portion of its metabolic energy to osmoregulation. these brine shrimp must pump water back into their cells to counter its loss due to osmosisactively pump water back out of their cells to counter its inflow due to osmosissynthesize membranes that are impermeable to substances that upset osmotic balanceactively pump salt back out of their cells to counter its inflow due to osmosis

Which system of units is used by only a small number of countries in the world, including the u.s.