During which period of disease is a patient most likely to spread a contagious disease?

Which of the following is a β{“version”:”1.1″,”math”:”β”}-lactam antibiotic?  

#21: 

#16: Let be the function given by

#7:  A particle moves along the -axis so that at any time ,

#28:

#8: The graph of , the second derivative of the function is shown above. Which of the following could be the graph of ?

#6: If

#22: Shown above is a slope field for which of the following differential equations?

#12: Let