Observation: I am in the lab timing how long it takes to boil a 100 mL of water in a beaker over a Bunsen burner observe it takes 5:15 seconds to boil the water. I want to get the most accurate answer possible so I repeat the test again make sure everything is the same. This time it takes me 7:05 minutes to boil the water. I think this is unusual so I repeat the excitement a third time and it takes 5:20 minutes. What could we infer about the difference in the times observed?​

The diagram below shows the layers of a rock having a trilobite: a rock column labeled rock is shown. the column has three layers. the bottommost layer of the rock has one shaded rhomboid shape, the middle layer has a rhombus with a diagonal along with two identical organisms marked as, trilobite, in the key, the top layer has two semicircles. a key is shown on the right side of the diagram. the shaded rhombus is marked as a, the rhombus with the diagonal is marked as b, the semicircle is marked as c which statement about the rock fossils is true?