Which phrase describes carbon-14 dating? A:uses the rate at which nitrogen-14 decays into carbon-14

B:dates the remains of organisms to determine when they died

C:measures the number of unstable elements in ancient volcanic rocks

D:determines the age of ancient fossils older than 50,000 years old

You drop a rubber ball off the roof of a 50 meter high building onto a paved parking lot. it bounces back up with every bounce, but not quite all the way back up to you. after the first bounce it bounces back only 80 percent of the distance it was dropped from. the pattern continues, meaning after every bounce it comes up to just 80 percent of the previous maximum height. so if before the first bounce the height is 50 meters, what height does the ball reach after the fifth bounce? round your answer to one decimal place and chose the correct response from the choices below:

Describe the 2 algebraic methods you can use to find the zeros of the function f(t)=-16t^2+400.

The graph and table shows the relationship between y, the number of words jean has typed for her essay and x, the number of minutes she has been typing on the computer. according to the line of best fit, about how many words will jean have typed when she completes 60 minutes of typing? 2,500 2,750 3,000 3,250