The number of players of an online game triples each week. The function f(x)=3^x represents the number of players in week x. When are there 81 players

Twenty percent of what number is 40?

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

Asunflower was 20 1/2 inches tall. over the next 6 months, it grew to a height of 37 inches tall. what was the average yearly growth rate of the height of the plzzz write a proportion i will give you 100 points