Answer:
A
Step-by-step explanation:
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Answer:
If you know the radius of a circular track, you can use physics to calculate how fast an object needs to move in order to stay in contact with the track without falling when it reaches the top of the loop.
The answer is 4 because if area is 28 meaning when you times the base and the height you'll get 28 therefore if you plug in 4 in the spot of x it should be 4+3 which equals 7 and since the value of x is 4 on top it must be 4 on the side too so you must do 7×4 which equals 28
Answer:

Step-by-step explanation:




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