# Math

The college president asks the statistics teacher to estimate the average age of the students at their college. How large a sample is necessary? The statistics teacher decides the estimate should be accurate within half year and be 92% confident. From a previous study, the standard deviation of the ages is known to be 3 years.

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1. Pay attention in class

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posted by Tom
2. my garden last year was a square with sides 28 ft. this year i added a section that is an isosceles triangle at one end of my square garden to form the figure below. if each of the two equal sides of the triangle is 18 feet. i'm having a problem with deer this year and therefore want to fence the garden. how many feet of fencing will i need to buy?

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3. What is the domain of 5x^2+21x+4

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4. 110

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5. i dont know

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posted by frances

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