A tire company claims that the lifetimes of its tires average 50500 miles. The standard deviation of tire lifetimes is known to be 5500 miles. You sample 150 tires and will test the hypothesis that the mean tire lifetime is at least 50500 miles against the alternative that it is less. Assume, in fact, that the true mean lifetime is 50000 miles. Compute the power of a test At what level should the test be conducted so that the power is 0.85.

rectangle: 9 1/8 x 4 1/9 = 37 37/72in

parallelogram: b times h= 10.3 x 6.2 = 63.86

trapezoid: a+b/2 times h= 42.5

volume of prism: l times w times h= 36

the one that has a slope of 1/2 and is positive.

step-by-step explanation: 2 buckets 1 trip ; 4 buckets 2 trips and so on.

geometry: triangles

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call the larger triangle abc

then the smaller triangle cde is similar to abc (all angles are equal, aaa).  

ab is the side that is 36, and we wish to find de, the side corresponding to ab

area_cde = area_abc - area_cde --> area_abc / area_cde = 2

let x=length of de

ratio of areas = (ratio of sides)^2

+2+=+%2836%2fx%29%5e2+

+2+=+1296%2fx%5e2+

++x%5e2+=+1296%2f2+=+648+

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