Please if you don't know don't answer

Ahands-free device may only be used if it can be activated or deactivated with a

What is 7/81 as a percentage? round your answer to the nearest tenth of a percent.

Layer r contains a well-known index fossil that is 100 million years old. based on this information and the principle of superposition, a. layers t and m are older than 100 million years, and layers x and g are younger than 100 million years. b. layers t, m, x, and g are all older than 100 million years. c. layers t and m are younger than 100 million years, and layers x and g are older than 100 million years.