A preschool is planning to build a new outside play area along side the building (see picture below). By code, the play area must have an area of 300 square feet. Fencing cost 21 dollars per foot installed. Find the dimensions of the play area that will minimize the total cost, and the minimum total cost.​

30 determine the coefficient on x 12 y 24 x12y24 in ( x 3 + 2 x y 2 + y + 3 ) 18 . (x3+2xy2+y+3)18. (be careful, as x x and y y now appear in multiple terms! )

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.

If olu is twice as old as funmi if the sum of their ages is 60 how old is olu