All Done?

Before you knew it, the hour was up. The overall progress was minimal, but it was the first time meeting so that was almost expected. In fact, Sofia had made considerably more progress on you instead. Her hand rested on your lower back, and one of her legs was confidently rubbing up and down yours.

You could see her sexual frustration as you got up and started to pack up your things. She had gotten so close, and wasn't about to let it go. As you put your laptop into your bag, Sofia pipes up and probes

"Hey Mr. John, I have a bet for ya. Test me on one last question. If you get it right, I'll give you an extra $50 right now."

Intriguing, you thought. But there had to be a catch. So you stared at her inquisitively as you waited for the other shoe to drop.

".....But if I get it right, I get a small reward. Whaddya think Mr. John?"

Clearly $50 was a lot for someone in her position, but it was clear her decision was coming from her other head. You pondered for a moment, and thought it wasn't a high risk bet. If anything, you did deserve a bonus for having to endure the onslaught of Sofia's hands and words. Plus, she was only answering at a 25% success rate for the lesson, and she was now further hampered by her sexual frustration.

"Okay why not haha." you shoot back, to which Sofia answers back with a big smile.

Here's the question you pose to her:

At what temperature are Celsius and Fahrenheit equal?