What is the value of a fourth term in a geometric sequence for which a1=30 and r=1/2

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.

Simplify the expression 10/11(22z) + (a+5) -1

Multiply. write your answer in simplest form. 3/8 x 5/7