1. what percent of 60 is 15 2. what number is 15% of 60
3. 9 is 12% of which number
4. 12% of 72 is what number
5. what percent of 50 is 18
6. 12 is 90% of what number ​

Two lines parallel to a third line are parallel to each other. always sometimes or never

The random variable x is the number of occurrences of an event over an interval of ten minutes. it can be assumed that the probability of an occurrence is the same in any two-time periods of an equal length. it is known that the mean number of occurrences in ten minutes is 5.3. the appropriate probability distribution for the random variable

The figures below are made out of circles, semicircles, quarter circles, and a square. find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations).