Mathematics, 21.07.2019 14:40, cutielove2912
The rockwell hardness of a metal is determined by impressing a hardened point into the surface of the metal and then measuring the depth of penetration of the point. suppose the rockwell hardness of a particular alloy is normally distributed with mean 70 and standard deviation 3. a. if a specimen is acceptable only if its hardness is between 67 and 75, what is the probability that a randomly chosen specimen has an acceptable hardness? b. if the acceptable range of hardness is (70 2 c, 70 1 c), for what value of c would 95% of all specimens have acceptable hardness? c. if the acceptable range is as in part (a) and the hardness of each of ten randomly selected specimens is indepen-dently determined, what is the expected number of acceptable specimens among the ten? d. what is the probability that at most eight of ten independently selected specimens have a hardness of less than 73.84? [hint: y 5 the number among the ten specimens with hardness less than 73.84 is a binomial variable; what is p? ]
Answers: 1
Mathematics, 21.06.2019 14:10, nunezjazmine01
Apackage of bacon holds 15 strips of bacon. the pancake house uses 17 packages of bacon in the morning and 21 packages in the afternoon. how many more strips were used in the afternoon than the morning?
Answers: 1
Mathematics, 21.06.2019 18:00, kaykardash
An appliance store sells lamps at $95.00 for two. a department store sells similar lamps at 5 for $250.00. which store sells at a better rate
Answers: 1
Mathematics, 21.06.2019 19:30, sofiisabella10
If you can solve all of these i will give ! - 4% of 190 - 4% of 162.5 - 4% of 140 - a 4% increase from 155.1 - a 4% increase from 159.8
Answers: 2
The rockwell hardness of a metal is determined by impressing a hardened point into the surface of th...
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