True, associative property
My guess would be the second choice - 90 degrees , I tried my best because idk if there’s a picture to this or anything :)
I have taken the test and I can confirm that the answer is
B. 15 m, 20 m, and 25 m.
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A plastic skeleton is
Answer: B. a physical model.
The world has lots of different kinds of models. A mathematical model might be a ball travels according to the equation 
. This isn't that. A computer model would be a program that somehow simulates a skeleton in the computer, this isn't that either. Our skeleton is an actual physical model just like a model airplane.
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Step-by-step explanation:
