Are Prayers Heard From Nonbelievers - Quick & Clear Bible Study

Some say that only believers' prayers are heard and nonbelievers' prayers are not. Is this right? Let's see from the Bible.

Verses used in this Bible study:
1 Thessalonians 5:17,25
Philippians 4:6
Acts 10:1-6,38-44
1 Peter 3:7,12
Matthew 6:5-9
John 16:23,24
John 3:16