An article in IEEE International Symposium on Electromagnetic Compatibility (Vol. 2, 2002, pp. 667-670) describes the quantification of the absorption of electromagnetic energy and the resulting thermal effect from cellular phones. The experimental results were obtained from in vivo experiments conducted on rats. The arterial blood pressure values (mmHg) for the control group (8 rats) during the experiment are x1= 90, s1= 5 and for the test group (9 rats) x2= 115, s2= 10. Assume that both populations are normally distributed Required:
Calculate a 95% 2-sided confidence interval for μ1-μ2.

James wants to promote his band on the internet. site a offers website hosting for $4.95 per month with a $49.95 startup fee. site b offers website hosting for $9.95 per month with no startup fee. for how many months would james need to keep the website for site a to be a better choice than site b? 1. define a variable for the situation. 2. write an inequality that represents the situation. 3.solve the inequality to find out how many months he needs to keep the website for site a to be less expensive than site b. 4. using words, describe how many months he needs to keep the website for site a to be less expensive than site b.

How do you use the elimination method for this question? explain, because i really want to understand!

Which of the following is an example of a rational number? a. π b. √ 9 c. √ 8 d. 3.8362319