â The presence of marijuana is detected by a drug test through the presence of the active chemical THC or Tetrahydrocannabinol. Technically, what is detected is known as THC-COOH (11-nor-delta-9-tetrahydrocannabinol-9-carboxylic acid).
1 Average Riding Instructor Salary: Independent riding instructors typically charge an hourly rate for services but on average earn about $35,000 to $39,000 per year.
The average cost for a horseback riding instructor is $45/hr. You are likely to spend between $35 and $60 per hour. Exact price may vary depending on your area and project details. Next Step: Find out exactly how much your project will cost.