I dive to 17 metres/56 feet for 47 minutes. After a 30-minute surface interval I do a second dive to 17 metres/56 feet. Losing track of time, I notice my bottom time is now 25 minutes. According to the General Rules, what should I do?

Solve each equation using the quadratic formula. find the exact solutions. 6n^2 + 4n - 11

Reduce fractions expressing probability to lowest terms. in 3,000 repetitions of an experiment, a random event occurred in 500 cases. the expected probability of this event is?

Unaware that 35% of the 10000 voters in his constituency support him, a politician decides to estimate his political strength. a sample of 200 voters shows that 40% support him. a. what is the population? b. what is the parameter of interest? state its value c. what is the statistics of the interest? state its value d. compare your answers in (b) and (c) is it surprising they are different? if the politician were to sample another 200 voters, which of the two numbers would most likely change? explain