What is the difference between 506 and 233

All per-unit concepts rely on ratios,meaning,to provide a type of measurement

Astandard deck of cards contains 52 cards. one card is selected from the deck. (a) compute the probability of randomly selecting a seven or king. (b) compute the probability of randomly selecting a seven or king or jack. (c) compute the probability of randomly selecting a queen or spade.

What is the effect on the graph of the function f(x) = x2 when f(x) is changed to f(x) − 4?