What is a tornado called before it hits the ground?

Which of the following is true about fossils? a. the relative age of fossils cannot be determined from their position in sedimentary layers. b. fossils found in lower layers of sedimentary rock are as old as fossils found in upper layers of sedimentary rock. c. fossils found in upper layers of sedimentary rock are older than fossils found in lower layers of sedimentary rock. d. fossils found in lower layers of sedimentary rock are older than fossils found in upper layers of sedimentary rock.

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

Which is the most reasonable capacity of a water pitcher. m a 2 ml b 20 ml c 2 l d 20 l