What is £8.19 minus 10%

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

Write the equation in logarithmic form e^x=403.429

What is 100,000 times 1/100,000, using the standard method of multiplication? write the answer as 10 to a power.