It takes Juan 20 hours to rake the front lawn while his brother, Eduardo, can rake the lawn in 12 hours. How long will it take them to take the lawn working together?

Acone is placed inside a cylinder. the cone has half the radius of the cylinder, but the height of each figure is the same. the cone is tilted at an angle so its peak touches the edge of the cylinder’s base. what is the volume of the space remaining in the cylinder after the cone is placed inside it?

Given lm, find the measure of (award brainliest)

Which of the following statements is true? a. sin 18° = cos 72° b. sin 55° = cos 55° с. sin 72° = cos 18° d. bоth a and c.