What is (10)1/2 this is simplifying rational exponent​

Can someone pls ! pls answer all. no explanation needed..

Celeste wants to have her hair cut and permed and also go to lunch. she knows she will need $50. the perm cost twice as much as her haircut and she needs $5 for lunch. how much does the perm cost?

A. what does the point (4, 122) represent? b. what is the unit rate? c. what is the cost of buying 10 tickets?