K/3 + 4 = 10
K/3 = 10 - 4
K/3 = 6
K = 6x3
K = 18
Answer:
There was a markdown of $26.28 which is 20.53% off the original asking price.
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I think the correct answer is B.
1200•1.07= 1284
1284•1.07= 1373
1373•1.07=1469
B is the closest
We assume the figure DEFG has vertices labeled clockwise from the top, so that diagonal EG spans the distance between vertices where sides of different length meet. Then half that diagonal (12) will be one leg of two different right triangles.
One right triangle will have a hypotenuse of 20 and a leg of 12. Its other leg is found using the Pythagorean theorem as
√(20²-12²) = 16
The other right triangle will have a hypotenuse of 13 and a leg of 12. Its other leg is
√(13²-12²) = 5
Then the total length of diagonal DF is 16 + 5.
The length of the other diagonal, DF, is 21 cm.