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The solutions to quiz 3 of math 1630 - internet for the spring 2009 semester. The quiz covers various topics including solving equations, determining domains and ranges, calculating intercepts, and analyzing functions. It also includes problems related to physics and economics. Students are required to show all work to receive full credit.
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MATH 1630 Internet
Spring, 2009 Quiz 3 Name:
This quiz includes sections 2.1, 2.2, 2.3, 2.4, 2.5, 3.1 and 3.
You must show all work to receive full credit. Points will be deducted for work that is not neat or
orderly. Do all work on these sheets. Round all decimal answers to the nearest one-hundredth.
x 4 x 2
2 5 t + 5 t + 3 = 0
2 f x = − 2 x + 5 x − 7
Domain:
Range:
2 f x = 5 x − 2 x − 3
x-intercept(s) (5 points)
y-intercept (2 points)
2 P x = 88 x − x − 1200 , where x is the number of
widgets. Calculate each of the following quantities. You must show all work.
a. (5 points) Calculate the break-even point(s).
b. (5 points) Calculate the maximum possible profit and the corresponding number of widgets to be
made and sold.
