Greek: 36 ἀσφαλῶς οὖν γινωσκέτω πᾶς οἶκος Ἰσραὴλ ὅτι καὶ κύριον αὐτὸν καὶ Χριστὸν ἐποίησεν ὁ θεός, τοῦτον τὸν Ἰησοῦν ὃν ὑμεῖς ἐσταυρώσατε. 37 Ἀκούσαντες δὲ κατενύγησαν τὴν καρδίαν, εἶπόν τε πρὸς τὸν Πέτρον καὶ τοὺς λοιποὺς ἀποστόλους· τί ποιήσωμεν, ἄνδρες ἀδελφοί; 38 Πέτρος δὲ πρὸς αὐτούς, μετανοήσατε, φησίν, καὶ βαπτισθήτω ἕκαστος ὑμῶν ἐπὶ τῷ ὀνόματι Ἰησοῦ Χριστοῦ εἰς ἄφεσιν τῶν ἁμαρτιῶν ὑμῶν, καὶ λήμψεσθε τὴν δωρεὰν τοῦ ἁγίου πνεύματος·
My Translation: 36 "Therefore, y'all must assuredly know, all Israel's house, that its Lord and Christ was worked by God: this Jesus whom y'all have crucified."
37 And hearing they were pierced in the heart, and they said towards Peter and the other apostles, "What should we do, men and brothers?"
38 And Peter towards them: "Y'all repent," he said, "and y'all be baptized, everyone of y'all, on the name of Jesus Christ in forgiveness of your sins, and y'all will receive the the holy spirit's gift."
KJV: 36 Therefore let all the house of Israel know assuredly, that God hath made the same Jesus, whom ye have crucified, both Lord and Christ.
37 Now when they heard this, they were pricked in their heart, and said unto Peter and to the rest of the apostles, Men and brethren, what shall we do?
38 Then Peter said unto them, Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins, and ye shall receive the gift of the Holy Ghost.
My translations are purposefully stretched and should not be viewed as more accurate than the KJV translation unless I say so in the post. I'm trying to show the range lying between the original Greek text and the English.
I have not yet begun work on a post to discuss this Scripture Mastery selection, but I've posted up my translation until I finish the post.