Which of the following sets of points are reflections of each other across the x-axis?

baha

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2 questions:

Which of the following sets of points are reflections of each other across the x-axis?

(4, -7) -> (4, 7)

(4, -7) -> (-4, -7)

(4, -7) -> (-4, 7)

(4, -7) -> (-7, 4)
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What is the length of the diameter of a sphere with a surface area of 1890.56 cm^2?

21.5 cm

24.54 cm

24.27 cm

12.27 cm
 
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