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Maths Puzzle
Numerical Ability
An electron can travel through a vacuum tube 2 m long in 2x10 with the exponent of -3 sec. What is the average speed of the electron?
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Malik has $3.08 in dimes, pennies,and nickels. He has nine fewer nickels than dimes and one more peeny than dimes. How manof each coin does he have.
How do I first simplify then solve:
-1/9u^-5*(45u^-4)