11.An electrocardiographic technician examines the following six-second strip of an electrocardiogram (ECG) she has recorded on a cardiac pa-
tient. How many times per minute is the patient's heart beating

Researchers randomly divide participants into groups. each group takes a different amount of omega-3 fatty acid supplements daily for a month. one group receives a placebo. the researchers measure the impact on cholesterol levels in the blood. what is the purpose of random assignment in this experiment? a, to produce treatment groups with similar characteristics b, to ensure that all people with high cholesterol have an equal chance of being selected for the study c, to increase the accuracy of the research results and prevent skewness in the data

Glucose is broken down in different ways, both in the presence and in the absence of oxygen. using the table for reference, what major products are formed in each reaction set?

20 the compound al(nh3)2 has atoms of nitrogen.