What is the fourth term of the sequence?
1. \(a_1=15\)
2. \(a_2=2a_1-10=2(15)-10=20\)
3. \(a_3=2a_2-10=2(20)-10=30\)
4. \(a_4=2a_3-10=2(30)-10=50 \)
+934 
