Classify the type of measurement as nominal ordinal ratio or interval 1 ranks in a dance contest
2 heights of basketball players
3 monthly electric bills
4 number of days in a calendar
5 aptitude test score

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Suppose a laboratory has a 30 g sample of polonium-210. the half-life of polonium-210 is about 138 days how many half-lives of polonium-210 occur in 1104 days? how much polonium is in the sample 1104 days later? 9; 0.06 g 8; 0.12 g 8; 2,070 g

What is the angle measure, or angle of depression, between this bird and the bird watcher?