Round 287 to the nearest hundred

Identify a1 and r for the geometric sequence an= -256(-1/4) n-1

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.

Find the area of the regular hexagon if a side is 20 cm.