You have $4150.in a cookie jar. Each month you spend half of the balance. How much do you have after 4 months? (Round your answer to the nearest cent.) Enter a number
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Two cyclists 84 miles apart start riding toward each other at the same. one cycles 2 times as fast as the other. if they meet 4 hours later, what is the speed (in mi/h) of the faster cyclist?

The figure below shows rectangle abcd and the triangle eca on a coordinate plane.which of the following expressions represents the perimeter of triangle of triangle eca in units