A single card is drawn from a standard 52 card deck. Work out the probability of choosing the "4 of spades".

Hector and alex traded video games. alex gave hector one fourth of his video games in exchange for 6 video games. then he sold 3 video games and gave 2 video games to his brother. alex ended up with 16 video games. how many video games did alex have when he started?

What is 0.000008 meters in scientific notation

Given sin28.4=.4756, cos28.4=.8796, and tan28.4=.5407 find the cos of 61.6