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A ball is thrown downward from a window in a tall building. Its position at time t in seconds is s=16t^2+32t, where s is in feet. How long (to the nearest tenth) will it take the ball to fall 149 feet?
While cleaning out the closet, John found coins. The box contained nickels, dimes, and quarters. He added up the change and found that there were 85 coins totaling $6.25 in the box. If there were 3 times as many nickels as dimes, how many quarters were there?
Solve. The combined resistance of two resistors r1 and r2 in a parallel circuit is given by the formula rt= 1 OVER 1/r1 + 1/r2. Simplify the formula.
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