Add the following fractions and mixed numbers. Express answers as a mixed number when possible and in the lowest terms

Which of the following equations defines the tube dilution in a serial dilution?

A) B) C) D)

An adolescent is defined as someone who is:

a. 8–16 years old. b. 10–16 years old. c. 13–18 years old. d. 9–18years old.