A scientist measures the initial amount of carbon-141414 in a substance to be 252525 grams. The relationship between aaa, the amount of carbon-141414 remaining in that substance, in grams, and ttt, the elapsed time, in years, since the initial measurement is modeled by the following equation. A=25e^{-0. 00012t}a=25e −0. 00012t a, equals, 25, e, start superscript, minus, 0, point, 00012, t, end superscript in how many years will the substance contain exactly 202020 grams(\text{g})(g)left parenthesis, start text, g, end text, right parenthesis of carbon-141414? give an exact answer expressed as a natural logarithm.

Driving on the highway can lead you to the hypnosis of a road, a condition of drowsiness or ignorance, you can avoid this condition

What kind of interaction is depicted in the image? a. intraspecific, direct b. intraspecific, indirect c. interspecific, direct d. interspecific, indirect e. invasion

Apopulation of deer mice was introduced into a desert ecosystem. being dark-colored, the deer mice stood out in the sand and were easy prey for predators. over a few years, the color of the mice changed from dark brown to light brown. what role does natural selection play in this example? a. the change of color camouflaged them, which them hunt better. b. the change of color enabled them to regulate their body temperature. c. the change of color allowed them to hide better from predators. d. the change of color made their bodies tolerant to the harsh desert sand. e. the change of color allowed them to deflect the excessive heat.