The diagram below gives the lengths of all but one side of pentagon ABCDE. What is the perimeter of pentagon ABCDE?
12 cm
Perimeter =
8 cm
4cm-
15 cm
hurry asap i need it by tomorrow!!

Which term best describes the association between variables a and b? no association a negative linear association a positive linear association a nonlinear association a scatterplot with an x axis labeled, variable a from zero to ten in increments of two and the y axis labeled, variable b from zero to one hundred forty in increments of twenty with fifteen points in a positive trend.

∆red ≅ ∆ by rule will give brainiest if possible

Aball is dropped from a height of 10m above the ground. it bounce to 90% of its previous height on each bounce. what is the approximate height that the ball bounce to the fourth bounce?