Question 3
which of the following isotopes is not commonly used for dating objects?
carbon-14
phosphorus-32
potassium-40
rubidium-87

Phosphorous – 32 isotopes is not commonly used for dating objects.

Phosphorous – 32

Explanation:

Radioactive dating is the process of determining the age of the rocks or other minerals using the radioactive isotope of the element. Several isotopes of an element are used for the dating purpose such as carbon-14, potassium-40 and rubidium-87.

Potassium is generally used with argon for determining the concentration of potassium in the mineral. Rubidium-87 is used with strontium to determine the age of the rock. Carbon-14 is used to date the objects that were the part of living organism.  

answer; ///i believe that the correct answer is (a) specialized cells)

the bald eagle got 50 because everything gets 10% of what they consume and since 50 is ten % of 500 hundred that means the   grasshopper had to have consumed a plant with 5,000 calories of energy