Answer:
5
Step-by-step explanation:
an = an_(n - 1) - 5
a2 = a1 - 5
a2 = 20 - 5
a2 = 15
===========
a3 = a2 - 5
a3 = 15 - 5
a3 = 10
============
a4 = a3 - 5
a4 = 10 - 5
a4 = 5
The answer is 177.4412
hope this helps
Answer:
P(defective) = 126/3000 = 0.042
P(not defective) = 1 - P(defective)
= 1 - 0.042 = 0.958
a < -4 or a > 7
solve the first inequality, then the second one