Find the area of the poygon

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

Which of the following values are in the range of the function graphed below? check all that apply ! - will give the answer "brainliest! "

Awater truck is filling a swimming pool. the equation that represents this relationship is y=19.75x where y is the number of gallons of water in the pool and x is the number of minutes the truck has been filling the pool.