Ivy randomly surveys students in her school to learn about mobile phone password use. Of 25 respondents, 14 use a password. Part A
Based on Ivy's data, how many of the 275 students in her school would be expected to use a password?

Part B
If Ivy conducted her survey of 25 students on a volunteer basis, are the results
representative of the school?
Why or why not?

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.

What is the volume of the sphere shown below with a radius of 3?

The following frequency table relates the weekly sales of bicycles at a given store over a 42-week period.value01234567frequency367108521(a) in how many weeks were at least 2 bikes sold? (b) in how many weeks were at least 5 bikes sold? (c) in how many weeks were an even number of bikes sold?