A plane at an altitude of 6000 ft is flying in the direction of an island. If angle of depression is 21° from the plane to the
island, what is the horizontal distance until the plane flies
over the island?

What is the 9th term in the geometric sequence described by this explicit formula? an=-6. (2)(n-1) apex

Se tiene en una caja de canicas 10, 4 blancas y 6 negras ¿cual es la probabilidad que en 2 extracciones con reemplazo sean blancas? ¿cual es la probalidad que en 2 extracciones sin reemplazo sean negras?

Consider an example of a deck of 52 cards: example set of 52 playing cards: 13 of each suit clubs, diamonds, hearts, and spades ace 2 3 4 5 6 7 8 9 10 jack queen king clubs diamonds hearts spades what is the probability of drawing three queens from a standard deck of cards, given that the first card drawn was a queen? assume that the cards are not replaced.