Mathematics, 25.01.2020 06:31 Briannadavis03
Agrinding wheel manufacturer designed a new grinding wheel. repeated tests were conducted on wheels of approximately the same weight. the tests showed that the new wheel enables free-cutting steels to be cut on an average of 225 surface feet per minute (sfm) with a standard deviation of 16.5 sfm and that the cutting rates are approximately normally distributed. a) what is the 75th percentile of the distribution of cutting got 236.137 sfmb) what is the probability that at least 3 wheels out of 10 randomly selected wheels in the study will have a cutting rate that is greater than the cutting rate calculated in part (a)? c) what is the probability that a randomly selected sample of 5 wheels in the study will have a mean cutting rate of at least 225 sfm?
Answers: 3
Mathematics, 21.06.2019 12:30, peggycab4201
Adriano loves anime and collects toys from his favorite series. each month he gains 4 toys. if adriano has 3 toys when he starts collecting, how many does he have after 4 months
Answers: 2
Mathematics, 21.06.2019 13:00, correafelix7
For [tex]f(x) = 4x+1[/tex] and [tex]g(x) = x^{2} -5[/tex] find [tex](f[/tex] ° [tex]g)[/tex][tex](4)[/tex]
Answers: 2
Mathematics, 21.06.2019 16:30, mildredelizam
Graph red beads cost $1 an ounce and gold beads cost $3 an ounce. juanita wants to purchase a 12-ounce mixture of red and gold beads that she can sell for $2 an ounce. the solution of the system shows the number of beads needed for juanita to break even. x + y = 12, x + 3y = 24 how many ounces of red beads will juanita buy to break even? how many ounces of gold beads will she buy?
Answers: 3
Agrinding wheel manufacturer designed a new grinding wheel. repeated tests were conducted on wheels...
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