Annual salaries for individuals in the accounting division of a national company have a mean of $85,400 and a standard deviation of $4,530. A researcher draws a sample of 30 from this
population and finds a sample means of $87,410. What is the 99 percent confidence interval for
this result?

Ascientist has 50 grams of a radioactive element. the amount of radioactive element remaining after t days can be determined using the equation (1) after two days the scientist receives a second shipment of 50 grams of the same element. the equation used to represent the amount of shipment 2 remaining after t days is 10) - 50 which of the following is an equivalent form of the expression for the amount remaining in shipment 2? what’s the answer?