Uranium-238 (u-238) decays into lead-206 (pb-206). which of the following is a true statement? a. pb-206 is the parent, and u-238 is the daughter. b. u-238 is the parent, and pb-206 is the daughter. c. a rock sample containing a relatively large amount of u-238 is old. d. a rock sample containing a relatively small amount of pb-206 is old.

Why is the price of rice so important? a. rice prices must be kept within reach of the poorest peopleb. rice prices must make a large profit or no one will grow itc. rice prices impact the cost of fruits and vegetables on neighboring farmsb. rice prices have no real importance other than to large corporations

Apex math 2 sem 2 unit 2 pre-test in the figure below, which term best describes point v? a. orthocenter b. circumcenter c. incenter d. centroid

Some gamma ray bursts are hypothesized to come from mergers of neutron stars or black holes. if this hypothesis is correct, what else should we in principle be able to detect from such mergers? a. gravitiational waves b. x-ray bursts c. significant disruption of gas thousands of light-years away in the surrounding galaxy d. an "afterglow" of bright visible light, lasting for weeks