What is the approximate volume of the cone? Use 3.14 for π

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

Sketch one cycle if the cosine function y=2cos2theta

Tyler enjoys the fish so much that after his birthday his family decides to take him to a famous aquarium a tank at the aquarium is similar to his tank with the scale factor of 8 how many times greater is the volume of the tank at the aquarium than the volume of tyler tank