Which transformation gives the same result as a reflection over the y-axis followed by a reflection over the x-axis? a. a rotation of 180° around the origin b. a rotation of 270° around the origin c. a translation to the left and then down d. a rotation of 90° around the origin

a. A rotation of 180° around the origin.

Step-by-step explanation:

A rotation of 180° around the origin would give us the same result as a reflection over the y-axis followed by a reflection over the x-axis. When we perform this rotation, we take each of its points through the transformation (x,y) ---> (-x, -y). This means that we would multiply the coordinates of each of the points on the shape by a negative. This is equivalent to reflecting a shape over the x-axis and the y-axis.

0.02

step-by-step explanation:

time of 9 192 631 770 periods of the radiation corresponding to the transition between the 2 hyperfine levels of the ground state of the caesium 133 atom at 0 k (but other seconds are sometimes used in astronomy)

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step-by-step explanation: