The edge of the observable universe is 46 billion ly away. If 1 pc = 3.26 ly, how far is the edge of the observable universe in Gpc?
HINT: 1 billion = 109, 1 Gpc
10 pc.

Which sequence of transformations on preimage ∆abc will not produce the image ∆a'b'c'? a. reflection across the line y = x b. rotation 180° clockwise about the origin followed by a reflection across the line y = -x c. reflection across the x-axis followed by a reflection across the y-axis d. reflection across the line y = -x followed by a rotation 180° counterclockwise about the origin e. reflection across the y-axis followed by a rotation 90° clockwise about the origin

The coco river is a natural border between nicaragua and which other country

What would have happened to portugal’s trade if they had not found a way to sail around the tip of africa