The length of a rectangle is 3 cm longer than its width. if the perimeter of the rectangle is 46 cm , find its area.

An object in geometry with no width, length or height is a(n):

Which has the greater energy, light of wavelength 519 nm or light with a frequency of 5.42 x 10^8 sec^-1?

Can you me with this question? i'll reward *30 points i just need with this one question so that i could solve the others. * edit: i originally set up the question to reward 30 points, but for some reason i can only reward 15. if you don't get 30, then i'm sorry. i'm still kind of new to this site