Astandard deck has 52 cards with 4 suits of 13 cards each: 2red suits and 2 black suits . what is the probability of drawing a red card from a standard deck?

Acompany wants to reduce the dimensions of its logo by one fourth to use on business cards. if the area of the original logo is 4 square inches, what is the area of the logo that will be used on the business cards?

Give me the equations of two lines that have the same slope but are not parallel.

In a singing competition, there are 150 participants. at the end of each round, 40% of the participants are eliminated. how many participants are left after n rounds?