A snail is at the bottom of a well that is 30ft deep. It can crawl upwards 3ft in one day, but at night it slips back 2ft. How long does it take the snail to crawl out of the well ?

What are potential hypotheses (explanations) regarding why there are ecological equivalents between many metatherians and eutherians? discuss your hypothesis in terms of the processes that could lead to the current ecologies and distributions of metatherians and eutherians.

This is so harddd! solve. 1 + 1 = solve 4 + 4 = solve 3 x 3

Which equation represents the partial sum of the geometric series?