Rick works off commission. He earns 10 percent of all manufacturing equipment he sells. if he made a sale of $9,000 how much was his commission​

Light traveling in a medium with a refractive index 1.19 is incident on a plate of another medium with index of refraction 1.79. at what angle of incidence is the reflected light fully polarized?

If a balloon is taken outside on a very cold day, what will occur?

Determine the age of a fossil if it had only one eighth of its original carbon-14 content remaining?