Mut'a marriage is a type of marriage in Islam in which the time of the marriage is agreed between man and woman and Mahr is paid to the woman (Dowry) just like permanent marriage, but there is no financial responsibility of expenses or housing for the woman on the man. It ends with the end of the agreed time or even before that if the man leaves the remaining period. It can be extended after the end or termination of its time and there will be no Iddah (waiting period) if it is between same same man and same woman.

Bismillah

Thank you for your question. Meditation is of many types but the most commonly discussed is where a person watches over their thoughts without judging or trying to stop them. With the passage of time, those thoughts become more silent and a person can reach a heightened state of calmness.

Yes it is allowed to pray on it, but it is better to cover that writing while performing Prayers to avoid diverting the mind of the person who is praying on it.

Wassalam

Yes it is allowed to work as an actuary in insurance company or any other company as far as the related product itself is not against the Islamic rules.

Wassalam