Halley's comet has an extremely elliptical orbit around the sun, with an eccentricity of 0.967. its average orbital radius is 17.8 au, and it was last observed in 1986. use kepler’s third law to calculate when halley's comet will appear next. (note: the answer you obtain is based on averaged data and is an approximation.)

2061

2073

2088

Saline iv fluid bags cost $64.20 for 24, 1000 ml bags from one supplier. a new supplier sells 500 ml bags for $2 each. the hospital uses about 10,000, 1000 ml bags each month. nurses report that about half of the bags are more than half full when they are discarded. if you are going to use only one supplier, which size bag provides the best deal, and how much will you save each month? compare the cost of the new supplier to the current one.