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Chapter 4: Problem 4
If \(x+y=0\), which of the following must be equivalent to \(x-y\) ? A) \(-2 y\) B) \(\frac{x}{y}\) C) \(x\) D) \(x^2\)
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$$ C=0.0045 P+5.22 $$ 28\. A production line manager uses the equation above to predict the production cost per item produced in dollars, \(C\), based on the number of products made, \(P\). In the context of the model, what is the meaning of \(5.22 ?\) A) The initial production cost, in dollars, of each product made B) The approximate production cost increase, in dollars per item, for each item made C) The approximate production cost, in dollars per item, for every \(0.0045\) products made D) The approximate production cost decrease, in dollars per item, for every \(0.0045\) products made
The principal at a large high school in a major city believes that the math teachers for each class assign drastically different amounts of homework to their respective students. Which method of sampling would be best to estimate the average number of hours of homework assigned to students by the different math teachers? A) Select one math teacher at random and survey the number of assigned homework hours in each of his or her classes. B) Post an online poll to the school's social media account that asks students how much math homework they get each night. C) Select 5 students from each math class in the high school and then record the number of hours assigned to each student selected. D) Select the student with the highest grade in each math class and then survey those students to see how much homework they do each night.
The author indicates that prior to the Stanford University study the scientists generally believed that antibiotic-resistant strains of tuberculosis A) had a better chance of survival than their antibiotic-susceptible ancestors. B) would once again become the most deadly of diseases. C) resulted in lowered amounts of sputum in those they infect. D) did not have a survival rate equal to that of non-resistant strains.
Samantha offers two different packages of yoga classes at her yoga studio. She offers two hot yoga sessions and three zero gravity yoga sessions at a total cost of $$\$ 400$$. She also offers four hot yoga sessions and two zero gravity sessions at a price of $$\$ 440$$. Samantha wants to offer a larger package for long-time clients in which the cost must exceed \(\$ 800\). If Samantha does not wish to include more than
A) NO CHANGE B) have lead C) have led D) has lead
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