If only 1/4 of the parent material is left and the half-life of the element is 10,000 years, how old is this sample?
O A. 2500 years
B. 5000 years
O C. 20,000 years
O D. 30,000 years.

Afamily has five members. a mom, a dad, two sisters, & a brother. the family lines up single file. what is the probabillity that the mom is at the front of the line

Afunction, f(x), represents the height of a plant x months after being planted. students measure and record the height on a monthly basis. select the appropriate domain for this situation. a. the set of all positive real numbers b. the set of all integers oc. the set of all positive integers od. the set of all real numbers reset next

What is the sum of these mixed numbers 4 2/3+ 3 1/9