10. Which color on the visible light part of the EM spectrum has the lowest 11. How are the types of waves arranged on the electromagnetic spectrum?
D. Violet
C. Red
B. Indigo
frequency?
A. Orange
A. By wavelength
C. In order
B. Alphabetically
D. By number of atoms
12. What type of energy doesn't require a medium?
A. Mechanical
C. Electromagnetic
B. Transverse
D. None of the above
13. Which of the following is listed from longest to shortest wavelength?
A. Microwaves, x-rays, ultraviolet
B. Gamma rays, x-rays, microwaves
C. Microwaves, x-rays, gamma rays
D. Visible light, microwave, infrared
D. Microwaves
7. What kind of wave has the second shortest wavelength?
A. X-ray
B. Ultraviolet C. Radiowaves
nocond longest wavelength?

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answer: a video game has three difficulty levels: easy, medium, and expert. the game's scoring works in such a way that a player has to score a fixed number of points to advance to the next level, and then the scoring starts over. the total score needed to clear all three difficulty levels is 7,500. two times the number of points needed to clear the easy level is 500 more than the number of points needed to clear the medium level. twice the number of points needed to clear the medium difficulty level is 1,500 more than the number of points needed to clear the expert level. if x, y, and z represent the easy, medium, and expert levels, respectively, and a is the coefficient matrix of the system of equations modeling this situation, identify the inverse matrix, a-1, and the solution matrix, x, of the system of equations.

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