If the beginning temperature of a mixture what is 22°C and the temperature change to 20 below 0° how much temperature change occurred? I need a answer plz!

b.

developed countries have tended to improve the environment, while developing countries have tended to damage it.

which elements do geologists measure to determine the age of an organism’s remains? check all that apply.

carbon-14

nitrogen

carbon-12

all fossil fuels are nonrenewable, so think coal, gasoline, things that we will eventually run out of. all fossil fuels are nonrenewable resources, but not all nonrenewable recourses are fossil fuels. these resources are not being renewed as fast as we are using them. i hope this considering there weren't any answer choices.