Emily is picking strawberries at a speed of 3 strawberries per second. her little sister sophia joins emily when there are 20 strawberries in emily's basket and starts to eat these strawberries at a speed of 5 strawberries per second. when sophia finally leaves, there are 8 strawberries in the basket. how long did sophia stay with emily?

Find the sum of the measure of the interior angles of a polygon of 9 sides ; of 32 sides

17. a researcher measures three variables, x, y, and z for each individual in a sample of n = 20. the pearson correlations for this sample are rxy = 0.6, rxz = 0.4, and ryz = 0.7. a. find the partial correlation between x and y, holding z constant. b. find the partial correlation between x and z, holding y constant. (hint: simply switch the labels for the variables y and z to correspond with the labels in the equation.) gravetter, frederick j. statistics for the behavioral sciences (p. 526). cengage learning. kindle edition.

In the figure below, ∠dec ≅ ∠dce, ∠b ≅ ∠f, and segment df is congruent to segment bd. point c is the point of intersection between segment ag and segment bd, while point e is the point of intersection between segment ag and segment df. the figure shows a polygon comprised of three triangles, abc, dec, and gfe. prove δabc ≅ δgfe.