27. using the information in parent-daughter material, which of the isotope pairs might be used to
determine the age of something that was once living?
a. c-14 & n-14
c. any of these could be used
b. k-40 & ar 40
d. u-235 & pb-206

Scientists often have to deal with numbers that are either very large or very small. for example, the radius of the sun is approximately 696,000 kilometers, while bacterial cells are as small as 1.9 × 10-4 millimeters. express each number in an alternate form.