URGENT What is the angle of rotation for the following figure?

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

Which of the following lines is not parallel to the graph of y = 4x +7?

Use the radius you found in part i (r=26.8 cm) with the surface area formula below to find the surface area of the sphere. show your work and round your answer to the nearest tenth. the surface area of a sphere: sa = 4πr^2 self note: 3.8.4