Rafael is taking a test that contains a section of 12 true-false questions. how many of the possible groups of answers to these questions have at least 6 correct answers of true? a. 2510 b. 2545 c. 2450 d. 2300 select the best answer from the choices provided a b c d

Which of the following is true for the relation f(x)=2x^2+1

What is the solution set of the quadratic inequality x2- 5< 0? o {xl-55x55{x- 155x55){xl -55x5 15){x1 - 15 sx5/5)

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?