30 The population of winbug beetles in 1990 was 27,000. The population each year after 1990 is shown by the equation below
P(t) = 6,000 + 21,000(1 + 0.031)
Which of the following best describes what will happen to the population of winbug beetles in the years after 1990?
OA. As t approaches positive infinity, P(t) remains constant.
OB.
As t approaches positive infinity, P(t) approaches positive infinity.
OC. As t approaches positive infinity, P(t) approaches zero.
OD. As t approaches positive infinity, P(t) approaches negative infinity.

it costs $20 to interview each person for a survey. find the cost to obtain a +- 3% margin of error.

step-by-step explanation:

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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+

25.45584