The half life of a certain radioactive material is 42 days and initial amount of the material has a mass of 49 kg. write an exponential function that models the decay of this material. find out how much radioactive material remains after 8 Days. Round your answer to the nearest thousandth.

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Afarmer has a large field that is x feet in length. he wants to fence in a rectangular section in the middle of the field , leaving a length of 100 feet of open field behind each end of the fenced rectangle. he also wants the width of the fenced-in space to be 100 feet less than its length. find the expressions to represent the length and width of the fenced section of the field

If value of cos330° is √3/2 then find tan165°.