There are 15 different variations of nachos possible.
Original length of the rope = 4m
Size of each piece = 3/5 m.
No of cords of same size formed will be

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The moon forms a right triangle with the Earth and the Sun during one of its phases, as shown below:
A scientist measures the angle x and the distance y between the Earth and the Sun. Using complete sentences, explain how the scientists can only use these two measurements to calculate the distance between the moon and the Sun.