Mathematics, 24.02.2021 01:00 hopechinn6646
A rectangle has sides of length of 2a-3 and 2+a, with a perimeter of 9. Write down an equation that involves a.
a) 6a - 2=9
b) 6a + 2=9
c) 3a + 1 = 9
d) 3a - 1 =9
Answers: 1
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Mathematics, 21.06.2019 14:00
Blank × 10-3 is 2,000 times greater than 1.9 × 10-6. it is also blank times greater than 9.5 × 10-4.
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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.
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