A savings and loan association needs information concerning the checking account balances of its local customers. A random sample of 14 accounts was checked and yielded a mean balance of $664. 14 and a standard deviation of $297. 29. Find a 98% confidence interval for the true mean checking account balance for local customers.

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Find an equation in standard form of the parabola that passes through (-2, 9), (-4, 5), and (1, 0)

Earth's atmosphere is unique among the planets and is able to support life because it contains a large amount of a) oxygen b) helium c) methane d) carbon dioxide