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3 years ago

11

While skateboarding at 19 km/h, Alana throws a tennis ball at 11 km/h to her friend Oliver. If Alana is the reference frame, the

speed of the tennis ball is km/h.

2 answers:

Delvig [45]3 years ago

8 0

8 km/h I think good luck if it's wrong

dmitriy555 [2]3 years ago

6 0

the answer is 11 km/h ... i just took the test

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