The function that models the scenario is
v = init_v + acceleration * time
Plug the values into the equation,
0 = 28 + a * 7 => -28 = a * 7 => a = - 28/7 m/s.
The answer to your problem is 0.125
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➷ A) (2/7 x 2/7) + (2/7 x 5/7) + (5/7 x 2/7) =
4/49 + 10/49 + 10/49 = 24/49 <== this is the answer
B) (2/7 x 1/6) + (2/7 x 5/6) + (5/7 x 2/6) -
2/42 + 10/42 + 10/42 = 22/42 <== this is the answer
The second answer could be simplified to 11/21 (only write this answer if it wants the simplified version, otherwise write the one above)
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A Pentagon has 5 lines of symmetry
