If points (–5, 8) and (4, –2) represent the endpoints of the diameter of circle D, then which point represents the center of circle D?

The center of circle D is (-0.5,3)

Step-by-step explanation:

Given the end points of diameter: (-5,8) and (4,-2)

To find: Center of the circle.

Center is in the middle of the diameter. Therefore we have to find the midpoint of the diameter.(refer figure)

Midpoint of a line with end points (x1, y1) and (x2, y2) is given by

(   ,  )

(    ,   )

(-0.5,3)

Hence the center of circle D is ( -0.5,3)

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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were is the equation