List the three reasons (given on page 254 of your text book) for a cosmetologist to study and develop an understanding of basic chemistry

The crust of earth may a- continets and ocean floors. b-continents only. c-layers of sedimentary rocks and continents. d-all of the above

A100-watt light bulb radiates energy at a rate of 100 j/s. (the watt, a unit of power or energy over time, is defined as 1 j/s.) if all of the light emitted has a wavelength of 525 nm , how many photons are emitted per second?

Asap! how do you lengthen a pattern piece? (family and consumer science, sewing)