Answer: C) 22 minutes Explanation: Let the two conditioners be A and B 'A' cools at 40min 'B' at 45min Together =(axb)/(a+b) = (45x40)/85 = 21.1764 = (approx) 22 min.

Answer: C) Stealth virus Explanation:

The aim of a group or party must be   • The mission or purpose of the group - what business they are in • The vision or direction they are headed - often expressed as the impact they want to have distinct from their purpose • The strategies for how they will get from where they are today to where they are headed; these are broadly stated, like a 50,000-foot overview, and are typically few in number, usually no more than 3-5 key areas of focus • The goals and objectives for how the strategies will be implemented; these are sometimes referred to as tactics or operational plans; there is usually no specific limit on the number of these, and they are more specific and not so far out in the future, often 1-2 years or less.