Which function is an even function? A. f(x) = sin(-3πx)
B. f(x) = tan3πx
C. f(x) = cos(5π/4)(x)
D. f(x) = csc(-π/2)(x)

At which value in the domain does f(x) =0?

Two planes leave an airport at the same time, one flying east, the other flying west. the eastbound plane travels 20 mph slower. they are 1600 mi apart after 2 hr. find the speed of each plane.

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?