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A study is conducted in patients with hiv. the primary outcome is cd4 cell count which is a measure of the stage of the disease. lower cd4 counts are associated with more advanced disease. the investigators are interested in the association between vitamin and mineral supplements and cd4 count. a multiple regression analysis is performed relating cd4 count to use of supplements (coded as 1=yes, 0=no) and to duration of hiv, in years (i.e., the number of years between the diagnosis of hiv and the study date). for the analysis, y=cd4 count.y=302 +15.1 suppliments -18.6 duration of HIV what is expected CD4 count for a paient taking supplements who has had HIV for 2.5 years. What is he expected CD4 count for a patient not taking supplements who was diagnosed with HIV at study enrolment. What is the expected CD4 count for a patient not taking supplements who had HIV for 2.5 years.
The hypotenuse of a 30°-60°-90° triangle is shown below. Find the length of each leg. (Round your approximation of radical expression to the nearest hundredth).
The radius of a right circular cone is increasing at a rate of 3 inches per second and its height is decreasing at a rate of 2 inches per second. At what rate is the volume of the cone changing when the radius is 40 inches and the height is 20 inc..
A rectangular page is to contain 196 square inches of printable area. The margins on each side are 1 inch. What should the dimensions of the page be so that the least amount of paper is used?
A bowling ball of mass 5.2 kg falls from a roof 7.8 m above the ground. When the ball reaches the ground, what is the kinetic energy of the ball?
Decide whether or not the events are mutually exclusive: Having good reading skills and having good math skills.
what are the two steps for simplifying radicals? provide an example to show each step. can either step be deleted? if
1.simplify the expression using the double-angle or half-angle formula3sin theta8 cos theta82. find sinx2 cosx2 and tan
Find the line integral of f(x,y,z)=x+y+z over the straight-line segment from (2,1,4) to (1,-2,2). The answer is 4(sqrt(14)). Can you show the work.
Graph triangle WXY on a separate piece of paper. How many lines of symmetry does Triangle WXY have?
Find the slope and intercepts. If necessary, round all answers to 2 decimal places.
If f is continuous on [0,1] and if (integral from zero to one of (f(x) x^n)dx)) =0 for n in the Naturals, prove that f(x)=0 on [0,1]/ Hint: The integral of the product of f with any polynomial is zero. Use the Weierstrass approximation theorem to ..
A rectangular field Is 35m longer than it's width. The length of the perimeter is 290m. Create a linear system to model the situation?
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