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85% of the fruits in a basket wereapples and the rest were mangoes. When 141 more apples and mangoes were added to the basket the percentage of apples increased by 20% and the numbers of mangoes tripled...

Suppose that the number of bugs in a rain-forest is growing exponentially.  If there were 2880 bugs after 3 weeks and 5120 bugs after 5 weeks, how many bugs were there initially? 

A farmer has 1600 feet of fence and wants to enclose a rectangular field with two internal fences parallel to one side, as shown below. What are the dimensions that would maximize the area? Make sure...

The most desctructive earthquake in contemporary Australian history occurred in Newcastle, NSW, in 1989. The earthquake had a magnitude of 5.6. (a) Assuming seismograph readings were taken...

Cecil Green sells golf hats. He knows that most people will not pay more than $23 for a golf hat. Cecil needs a 39% markup on cost. What should Cecil pay for his golf hats? (Round your answer to the...

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