Tess needs to buy sand for her children’s playground. the sand costs $8 per ton, and there is a delivery cost of $50 with each order. what types of numbers are possible in the range?

options
all positive rational numbers less than 8
all positive rational numbers greater than 50
all positive rational numbers
all rational numbers

You were told that the amount of time lapsed between consecutive trades on the new york stock exchange followed a normal distribution with a mean of 15 seconds. you were also told that the probability that the time lapsed between two consecutive trades to fall between 16 to 17 seconds was 13%. the probability that the time lapsed between two consecutive trades would fall below 13 seconds was 7%. what is the probability that the time lapsed between two consecutive trades will be between 14 and 15 seconds?

Which system of linear inequalities is represented by the graph?

What is the length of the segment, endpoints of which are intersections of parabolas y=x2? 11 4 x? 7 4 and y=? 7 8 x2+x+ 31 8 ?