Suppose Cosine (x) = StartFraction 1 Over StartRoot 5 EndRoot EndFraction and sin(x) > 0. What is the value of tan(2x)?

Atoy company is considering a cube or sphere-shaped container for packaging a new product. the height of the cube would equal the diameter of the sphere . compare the volume to surface area ratios of the containers. which packaging will be more efficient? for a sphere, sa =4πr²

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

Jane has 5 nickels.john has 3 dimes.jane says she has a greater amount of money.with the information given,is she correct?