Hello guys im having trouble with this question could someone help i need it asap

Aperson travels 35 km in 0.4hrs, followed by 53 km in 0.6 hr. what is the average speed

How many major plates cover the earth

The phylogenetic tree illustrates the relationship between humans and our closest living relatives. the tree was based on biochemical comparisons, including dna and amino acid sequences. according to the biomolecular data, we could infer that a) the four organisms do not have a common ancestor. b) humans are more closely related to chimps than any other apes. c) chimps are more closely related to gorillas than they are to humans. eliminate d) there is no evidence if any relationship between the four branches on the tree.