What degree of rotational symmetry does an equilateral triangle have? A)45° B)90° C)120°
D)180°

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

Ana drinks chocolate milk out of glasses that each holdof a liter. she has of a liter of chocolate milk in her refrigerator. 10 how many glasses of chocolate milk can she pour?

List x1, x2, x3, x4 where xi is the midpoint endpoint of the five equal intervals used to estimate the area under the curve of f(x) between x = 0 and x = 10.