The picture shows a type of rock called a banded iron formation. the rock contains high levels of iron oxides minerals, which form only when iron at earth's surface combines with oxygen. approximately how old would earth's oldest banded iron formations be? 3 billion years old 4.6 billion years old 5 billion years old 65 million years old

Group control group #1 experimental group yes yes yes control group #2 no new drug orange juice bed rest no yes no yes ves which of the following is the best explanation of why a second control group was included in this experiment? o a. to provide the volunteers in the study with something to drink o b. to prove that the common cold cannot be cured c. to confuse anyone who is trying to steal their new drug and sell it as their own invention o d. to researchers conclude that results are related to the new drug and not to the orange juice submit e previous