Teyla wants to find the distance, AB, across a river. She starts at point B, walks along the edge of the river for 94 feet, and marks point C. Then she walks 76 feet further and marks point D. She turns 90°, walks until her final location, and marks point E. Point E, point A, and point C are collinear. a) Can Teyla conclude that ABC and EDC are similar? _

If so, which triangle similarity theorem/postulate can she use? _

b) Suppose DE = 103 feet. Calculate the distance of AB to the nearest tenth of a foot. Show your work. Don't forget to label your answer.

Work:

AB = _​

Data from 2005 for various age groups show that for each $100 increase in the median weekly income for whites, the median weekly income of blacks increases by $105. also, for workers of ages 25 to 54 the median weekly income for whites was $676 and for blacks was $527. (a) let w represent the median weekly income for whites and b the median weekly income for blacks, and write the equation of the line that gives b as a linear function of w. b = (b) when the median weekly income for whites is $760, what does the equation in (a) predict for the median weekly income for blacks?