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Answer:
They will pass in 30.97 seconds (16/31 minutes).
Step-by-step explanation:
blah blah this the answer nothing more nothing less
Answer: 2.25x

Scientific notation is used in science because the number can be vary from so much that using decimal is making it hard. The number expressed in

form. Both number in the question is already in scientific notation. Then to multiply the number and keep it at scienfitic notation the calculation should be:
2.5 x

x 9 x

= 22.5 x

= 2.25x