Andrea doubles as a professional pianist and a dedicated mother. She modeled a few relationships.

Answer:
S(B(r))
Step-by-step explanation:
B = sleep hour
S = practice hour
S(B(r))
Andrea doubles as a professional pianist and a dedicated mother. The modeled relationship is S(B(r)).
We have given that,
Andrea doubles as a professional pianist and a dedicated mother. She modeled a few relationships.
We have to determine the correct modeled for given relationship.
The entity-relationship (ER) data model has existed for over 35 years. There are a few types of attributes you need to be familiar with.
B = sleep hour
S = practice hour
S(B(r))
Therefore the modeled relationship is S(B(r)).
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