Mathematics, 09.12.2019 07:31, abby28734
The ratio of teachers to students at a school is 3: 74. there are 2,500 students at a school. about how many teachers are at the school?
Answers: 1
Mathematics, 21.06.2019 18:30, jahnoibenjamin
Evaluate cos2θ for cosθ = square root of 3/2
Answers: 1
Mathematics, 21.06.2019 19:40, evarod
Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.
Answers: 3
Mathematics, 21.06.2019 21:30, Joejoe1813
Due to bad planning, two of the local schools have their annual plays on the same weekend. while 457 people attend one, and 372 attend the other, only 104 people were able to attend both. how many people went to at least one play?
Answers: 1
The ratio of teachers to students at a school is 3: 74. there are 2,500 students at a school. about...
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