A set of diagrams. The bottom is labeled Age in years. A log underground with many arrows representing movement from the log to aboveground, at 100 percent; Age is 0 years. A log underground with fewer arrows representing movement from the log to aboveground, at 50 percent; Age is 5,730 years. A log underground with four arrows representing movement from the log to aboveground, at 25 percent; Age is 11,460 years. A log underground with two arrows representing movement from the log to aboveground, at 12.5percent; Age is 17,190 years. Which statements describe the image? Check all that apply.
A) The wood is releasing argon gas.
B) This information is useful for dating ancient rock.
C) The process works only with organic matter.
D) The element has a half-life of 5,730 years.
E) This shows the half-life of carbon-19.

Tall, cone-shaped mountains in which layers of lava alternate with layers of ash are called a. shield volcanoes. b. cinder cone volcanoes. c. composite volcanoes. d. lava plateaus. select the best answer from the choices provided a b c d i need asap

When analyzing tree rings, what do scientists assume a thin ring indicates?

The kidney filters potentially toxic substances in the blood, and thus “clears” the blood of those substances. this clearance function is dependent upon and proportional to the diffusion gradient of the substance across filtering capillaries, i.e. if the concentration of the substance is doubled, twice as much will be cleared from each ml of blood that is filtered. suppose that the body produces a constant amount of a substance x per unit of time. the kidneys eliminate substance x at a rate directly proportional to the concentration of the substance and the volume of blood cleared each minute (c): elimination = c × [x], where [x] is the steady-state concentration of substance x. imagine an individual with an initial concentration of x equal to [x]0 who develops kidney disease. her baseline clearance c0 drops to one half of the original (½c0). what is the new steady state concentration of x? (for simplicity, assume that substance x is 100% filtered by the kidney).