Which postulate can be used to prove the two triangles are congruent?

What is the number 321,000,000 in scientific notation? also what is the number? ?

Lydia collected two sets of data one set of data shows an outlier. which set has an outlier, and which number is the outlier?

Hii1977 cleaner shrimp are a species of shrimp that clean parasites from other organisms. fish allow the shrimp to eat the parasites in their mouth. the shrimp get a source of nutrition. the relationship between the shrimp and the fish is this association indicates that for the smaill aneser arecommensal,mutualistic,or parasitic for the begger one the anser are the shrimp and fish benefit each other , the shrimp harm the fish, or the fish do not benetit from the shrimp