The number 1953 R8T9 467 is a valid card number when verified by the Luhn Algorithm. R and T are each single digits of the number such that R is less than T. Determine all possible values of R and T.

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step-by-step explanation:

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d 25 pi/6

step-by-step explanation:

the diameter is 10 inches

the radius is 1/2 of the diameter or 5 inches

the area of the circle is

a = pi r^2

  = pi 5^2

  = 25 pi

the slice is 60 degrees of the entire circle.

60 degrees out of 360   60/360 = 1/6

the area of the slice is 1/6 of the circle

a slice = 1/6 a circle

a slice = 1/6 * 25 pi

4n=2m

ratio of m to n: 2/4 = 1/2

answer

a. 1/2