There are four multiple-choice questions on an exam, each with four possible answers (a) Determine the number of possible answer sequences for the four questions.
(b) Only one of the sets can contain all four correct answers. If you are guessing, so that you are as likely to choose one sequence of answers as another, what is the probability of getting all four answers correct? (Use 5 decimal places.)

In the diagram below what is the approximate length of the minor arc ab

/is used for a fraction 1) if x = 2/3 and y = 3/4, what is the value of (x + y) (x/y) expressed as a common fraction? 2) what is the least positive integer greater than 1 that leaves a remainder of 1 when divided by each of 2, 3, 4, 5, 6, 7, 8, and 9? 3) the ponde family's powerjet pumps 420 gallons of water per hour. at this rate, how many gallons of water will it pump in 45 minutes? 4) kim's insurance company pays 80% of the cost of all prescription medication she purchases in a year beyond the first $250 worth of prescriptions. her prescriptions for this year cost a total of $570. how many dollars of this amounts will kim's insurance company pay?

What is the solution to the equation? k/6.4=8.7 2.3 5.568 15.1 55.68