Vertical is an orientation aligned with gravity, going straight up and down. Horizontal is an orientation parallel to the horizon, extending from left to right.
Forty is the correct and standard form, representing the numerical value 40. Fourty is the incorrect term. The difference between forty and fourty lies in their spelling and pronunciation. Fourty has an extra letter u.
In person (not hyphenated) is an adverbial phrase that describes the act of being physically present at a specific location or event. In-person (hyphenated) is an adjective that describes something occurring or involving face-to-face interaction or physical presence.