If 6x and 9x are the complementary angles to each other, then find these angles

What are the domain and range of f(x)=[1/5]x

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

Use sigma notation to represent the following series for 9 terms.