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Why is it that a particle accelerator will never accelerate a particle to the speed of light??? If the length of arc is 2. If the radius of the circle is between 4 and 5, what is one possible integer value of the angle? 18 Pennies 13Dimes 18Nickels 13 Quarters. What is the probability of randomly grab a nickel and then, without replacement, another nickel? Find the perimeter of parallelogram is found by +×÷*??? The length of all the sides of the figure.... do I add, multiple, subtract or divide? If I save $1000 every month how many years would it take for me to be a million?