YOU SAID:

I have an exam in eight hours and thirty minutes

INTO JAPANESE

私は8時間30分で試験を受けます

BACK INTO ENGLISH

I take the exam in 8 hours 30 minutes

INTO JAPANESE

8時間30分で受験します

BACK INTO ENGLISH

Take the exam in 8 hours and 30 minutes

INTO JAPANESE

8時間30分で試験を受ける

BACK INTO ENGLISH

Take the exam in 8 hours and 30 minutes