Mathematics, 24.06.2019 07:40 potternatalie90
The article “mix design for optimal strength development of fly ash concrete” (cement and concrete research, 1989, vol. 19, no. 4, pp. 634–640) investigates the compressive strength of concrete when mixed with fly ash (a mixture of silica, alumina, iron, magnesium oxide, and other ingredients). the compressive strength for nine samples in dry conditions on the twenty-eighth day are as follows (in megapascals): 40.2 30.4 28.9 30.5 22.4 25.8 18.4 14.2 15.3 find a 95% prediction interval on the next sample that will be tested. assume population is approximately normally distributed. round your answers to 2 decimal places.
Answers: 3
Mathematics, 20.06.2019 18:04, jasonoliva13
The sum of the product of 4 and x and the product of 7 and y is 61. the sum of the product of 12 and x and the product of 21 and y is 61. what are the values of x and y?
Answers: 1
Mathematics, 21.06.2019 17:30, aprilreneeclaroxob0c
Mrs. morton has a special reward system for her class. when all her students behave well, she rewards them by putting 3 marbles into a marble jar. when the jar has 100 or more marbles, the students have a party. right now, the the jar has 24 marbles. how could mrs. morton reward the class in order for the students to have a party?
Answers: 3
Mathematics, 21.06.2019 18:00, davidleew24
What can you determine about the solutions of this system
Answers: 1
Mathematics, 22.06.2019 01:00, chrischris1
The answer is 7.2 how would you put this as money
Answers: 2
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