A compact disc has an approximate radius of 2 3/8 inches. disregarding the small hole at the center of the CD, what is the approximate area of a CD?

The area of CD is 17.71

Step-by-step explanation:

Radius of the disk = = 2.375 in

Since CD is in shape of circle So area of the circle is given by

Put the value of radius in above equation we get

A = 3.14 ×

A = 17.71

Therefore the area of CD is 17.71

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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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