What is the most probable age of the ocean floor at location X, if the Pacific Plate and the Juan de Fuca Plate are moving at the same rate? (1) 10 million years (3) 6 million years (2) 8 million years (4) 4 million years ​

Which revelation resulted from the observation of the spectrum of different galaxies? a. there were more galaxies whose spectrum was blueshifted b. there were no galaxies whose spectrum was redshifted c. there were more galaxies whose spectrum was redshifted d. there were no galaxies whose spectrum was blueshifted