Choose correct response

Given: circle a externally tangent to circle b. how many possible common tangents to circles a and b can exist? 2 3 4

How does the bare soil surface type affect the amount of runoff

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