20 minutes is the correct answer
Answer:
Cardio- is a combining form used like a prefix meaning “heart.” It is used in many medical and scientific terms. Cardio- comes from the Greek kardía, meaning “heart.” In fact, the English word heart and the Greek kardía are related. Learn more at our entry for heart.
Explanation:
The answer is letter C. She
measures the value of economic production and consumption, because Econometrics
is the application of mathematics and statistics to the study of economic and
financial data. It is involved in the study of problems, the analysis of data,
and the development and testing of theories and models.
Answer:
only eukaryotic cells have a nucleus
Answer:
B) Valves closing
Explanation:
A healthy heart makes a lub-dub sound with each beat. This sound comes from the valves shutting on the blood inside the heart. The first sound (the lub) happens when the mitral and tricuspid valves close.