Acurrent estimate using the drake equation suggests that there are about two other civilizations in our galaxy with which we could communicate. suppose you believe that civilizations last two times longer than the number used in the estimate. if that were the case, how many civilizations would you estimate we could communicate with?
a. 1
b. 2
c. 4
d. 8

Brainliest to who answers! what will always cause a supply curve to shift to the left?

In e. c. tolman's experiment, some rats were trained to run through mazes for standard food goals, while other rats were allowed to explore the mazes for 10 days without food goals or other rewards. later, when food rewards were placed in a box at the far end of the maze, the previously unrewarded rats reached the food box as quickly as the rewarded rats after only one or two trials. this experiment demonstrated that the rats had the ability to form of their surroundings.

Which of the following explain how the audio recording interprets the source text? check all of the boxes that apply.