Mathematics, 21.04.2021 19:50 coolkason
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100 students are interviewed to see which of biology, chemistry or physics they prefer.
70 of the students are girls. 42 of the girls like biology best.
11 of the boys prefer physics.
13 out of the 21 who prefer chemistry are girls.
What percentage of the students prefer biology?
%
Answers: 3
Mathematics, 21.06.2019 17:00
Segment xy is dilated through point m with a scale factor of 2. which segment shows the correct result of the dilation
Answers: 1
Mathematics, 21.06.2019 19:40
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 22:00
Given that sin∅ = 1/4, 0 < ∅ < π/2, what is the exact value of cos∅? a. (√4)/4 b. (√15)/4 c. (4π)/2 d. (4√2)/4
Answers: 2
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100 students are interviewed to see which of biology, chemistry or physics they prefer.
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