A piece of marble has been machine-carved into the shape of a cone with the dimensions shown. It has a mass of 169 kg. What is the density of the marble, to the nearest kilogram per cubic meter?
0.7 m
0.3 m
853.9 kg/m
640.4 kg/m
168.9 kg/m
2.562 kg/m

There are two major tests of readiness for college: the act and the sat. act scores are reported on a scale from 1 to 36. the distribution of act scores in recent years has been roughly normal with mean µ = 20.9 and standard deviation s = 4.8. sat scores are reported on a scale from 400 to 1600. sat scores have been roughly normal with mean µ = 1026 and standard deviation s = 209. reports on a student's act or sat usually give the percentile as well as the actual score. the percentile is just the cumulative proportion stated as a percent: the percent of all scores that were lower than this one. tanya scores 1260 on the sat. what is her percentile (± 1)?