If you spent $43.78 on an outfit for the dance and you gave the the sales clerk $50.00 how much change should you expect to receive

What is the ratio for the surface areas of rectangle prisims shown below given that they are similar and that the ratio of their edge lengths is 7: 3

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?

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