If 7000 dollars is invested in a bank account at an interest rate of 4 per cent per year, Find the amount in the bank after 9 years if interest is compounded annually:
Find the amount in the bank after 9 years if interest is compounded quaterly:
Find the amount in the bank after 9 years if interest is compounded monthly:
Finally, find the amount in the bank after 9 years if interest is compounded continuously:
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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.