Awater well is to be drilled in the desert where the soil is either rock, clay or sande. the probability of rock is p(r)=0.53. the clay probability is p(c)=0.21. the sand probability is p(s)=0.26. if it is rock, a geological test gives a positive result with 35% accuracy. if it is clay, a geological test gives a positive result with 48% accuracy. the test gives a positive result with 75% accuracy for sand. given the test is positive, what is the probability that soil is sand, p(sand l positive)?

What value of x is in the solution set of 4x - 12 s 16 + 8x? -10 -9 -8 -7

At the olympic games, many events have several rounds of competition. one of these events is the men's 100-meter backstroke. the upper dot plot shows the times (in seconds) of the top 8 finishers in the final round of the 2012 olympics. the lower dot plot shows the times of the same 8 swimmers, but in the semifinal round. which pieces of information can be gathered from these dot plots? (remember that lower swim times are faster.) choose all answers that apply: a: the swimmers had faster times on average in the final round. b: the times in the final round vary noticeably more than the times in the semifinal round. c: none of the above.

Need ! the total ticket sales for a high school basketball game were $2,260. the ticket price for students were $2.25 less than the adult ticket price. the number of adult tickets sold was 230, and the number of student tickets sold was 180. what was the price of an adult ticket?