How are relative dating and absolute dating different?

a.
relative dating gives the order in which a rock layer formed compared to those around it by using layering and fossils, while absolute dating can give the age in years by using half-lives of radioisotopes.

b.
relative dating can give the age of rock in years by using radioisotopes, while absolute dating can only give the relative age of rocks to those around it using fossils.

c.
while both relative and absolute dating can give the age of a rock layer in years, relative dating uses radioisotopes and absolute dating uses layering order and fossils.

d.
relative dating can give the age in years by using fossils and layering order, while absolute dating can only tell whether one rock layer came before or after another by using radioisotopes.

Ascientist is explaining how background cosmic radiation gives evidence of the big bang theory. she says that radiation has been detected everywhere equally as heat in the universe and is increasing. this has been shown to be residual radiation from the big bang. what error did the scientist make?

Scientist: cross-sections of stalactites—calcite formations deposited on cave ceilings by seeping water—can reveal annual variations in rainfall in particular areas over hundreds and thousands of years. we often found that when—according to these cross-sections—drought occurred in a particular area, it coincided with the collapse of an ancient society in that area. i hypothesize that drought reduced agricultural productivity in these areas, thereby leaving these societies without the resources needed to handle internal stresses and external threats. which of the following, if true, would most weaken the support for the scientist's hypothesis? a. many droughts indicated in the cross-sections of stalactites do not correspond with the collapse of a society in that area. b. information from the cross-sections of stalactites alone cannot reveal the level of agricultural output in an area at a particular time. c. most of the societies that collapsed during droughts did so when internal power struggles coincided with military raids from neighboring societies. d. most of the societies that collapsed during droughts maintained large stockpiles of food and water at the time of their collapse. e. information from stalactites also suggests that the collapse of some societies coincided with periods of abnormally high rainfall.

The standard deviation of a population is 3.2.what is the margin of error? enter your answer in the box.