Trina has 72 collector's stamp. she puts 43 of the stamps into a stamp book. how many stamps left

One card is dealt from a 52 card deck. find the probability that the dealt card is a 4 or a black 7

Let hh represent the number of hummingbirds and ss represent the number of sunbirds that must pollinate the colony so it can survive until next year. 6h+4s > 746h+4s> 74 this year, 88 hummingbirds pollinated the colony. what is the least number of sunbirds that must pollinate the colony to ensure that it will survive until next year?

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.