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In the diagram, a man walks a distance of x m at a speed of 1.25 m/s from A to B.Then he swims across a river directly from B to D at a speed of 1 m/s. Given that D is directly opposite to C,...

The figure shows a parallelogram OPQR. Given that Q lies on the line y=2x+1 and x increases at a rate of 1.2 units per second, find    (a) the rate of change of the area of the...

a home supplies manufacturer sells their products through household parties. A skilled salesperson is able to develop three new parties for the next week out of each party held.  Starting...

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