What is the exact value of the trigonometric function cos(-870)?

The midpoints of the sides of the large square are joined to form a smaller square. what is the area of the smaller square

Sam is picking fruit from a basket that contains many different kinds of fruit. which set of events is independent?

(30 points). the population of a city is 45,000 and decreases 2% each year. if the trend continues, what will the population be aer 15 yrs