Gael uses 5 centimeters of string to hang each decoration of gale hangs 2 decorations , how much string does he use

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

This is about circle theorems. someone asap : (

What is the next step in the given proof? choose the most logical approach. a. statement: m 1 + m 2 + 2(m 3) = 180° reason: angle addition b. statement: m 1 + m 3 = m 2 + m 3 reason: transitive property of equality c. statement: m 1 = m 2 reason: subtraction property of equality d. statement: m 1 + m 2 = m 2 + m 3 reason: substitution property of equality e. statement: 2(m 1) = m 2 + m 3 reason: substitution property of equality