The 5th and 6th grade students at jackson middle school are going on a field trip. there are 6 classes in the fitth grade, and each class has 24 students. there are 3 classes in the sixth frade and each clas has 20 students. if the trachers clollect $12 from each student in the trip, how much money will be collected, so the answer i have is $2448, i multiply 24x6=144 and them i multiply 20x3=50 i added together =204*12= 2448 is this is right!

The weibull distribution is widely used in statistical problems relating to aging of solid insulating materials subjected to aging and stress. use this distribution as a model for time (in hours) to failure of solid insulating specimens subjected to ac voltage. the values of the parameters depend on the voltage and temperature; suppose α = 2.5 and β = 190. (a) what is the probability that a specimen's lifetime is at most 250? less than 250? more than 300? (round your answers to four decimal places.) at most 250 less than 250 more than 300 (b) what is the probability that a specimen's lifetime is between 100 and 250? (round your answer to four decimal places.) (c) what value is such that exactly 50% of all specimens have lifetimes exceeding that value? (round your answer to three decimal places.) hr