Given the Sphere below, How many whole spheres what do you do you do you have a volume of at least 2000cm^3. 3.14 for pi and height = 12

Find the value of the cosine for angle a

What is the missing constant term in the perfect square that starts with x^2 -20x

The roof of a farm silo is the shape of a hemisphere and is made of sheet tin. if the diameter of the silo is 126.5 feet, how much sheet tin is needed to make the roof? (use π = 3.1416.)