A waiter believes the distribution of tips has a model that is slightly skewed to the ​, with a mean of ​$9.40 and a standard deviation of ​$6.80. Usually waits on about 40 parties over a weekend of work. ​a) Estimate the probability that will earn at least ​$450. ​b) How much does earn on the best 5​% of such​ weekends?

What is the approximate total length of iron edging needed to create the square frame and the two diagonals?

What is the distance between (–2 1/2,-3) and (1, –3)?

Acable company wants to provide cell phone service for residents on an island. the function for the cost of laying the cable from the island to the mainland is c(x)= 6.500 square root x2+4, where x represents the length of the cable in feet. what are the domain and range of the function? a) domain: all real numbers range: all real numbers greater than or equal to 17,000 b) domain: all real numbers greater than or equal to 0 range: all real numbers greater than or equal to 17,000 c) domain: all real numbers greater than or equal to 0 range: all real numbers greater than or equal to 13,000 d) domain: all real numbers greater than or equal to 13,000 range: all real numbers greater than or equal to 0