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MARKET RESEARCH Trendex, a telephone survey company, has been hired to conduct a television-viewing poll among urban and suburban families in the Los Angeles area. The client has stipulated that a maximum of 1500 families is to be interviewed. At least 500 urban families must be interviewed, and at least half of the total number of families interviewed must be from the suburban area. For this service, Trendex will be paid $6000 plus $8 for each completed interview. From previous experience, Trendex has determined that it will incur an expense of $4.40 for each successful interview with an urban family and $5 for each successful interview with a suburban family. How many urban and suburban families should Trendex interview in order to maximize its profit?
an automobile radiator holds 26 liters of fluid. there is currently a mixture in the radiator that is 80% antifreeze and 20% water. how much of the liquid should be drained and replaced by pure antifreeze so that the resulting mixture is 90% antif..
trade discount of 30 and 10 are to be taken on an invoice that totals 2546.45 including prepaid shipping charges of
A jewelry supplier has a supply of earrings which are 40% platinum. A store owner orders five sets of earrings from the supplier. If the supplier selects the pairs of earrings at random, what is the chance that the jewelry store gets exactly two s..
The coliform levels were assumed to vary according to a normal distribution with a mean of 10 organisms per liter and a standard deviation of 2 organisms per liter. what is the 90th percentile on this.
In each case make a conjecture about a possible generalisation, and explore it (i.e. attempt to prove your conjectures true or false).
During a windstorm, part of the top of a flagpole breaks off. The broken top portion touches the ground at an angle of [c]5° 1[e] feet from its base, How tall was the pole before the windstorm
Let V be a finite-dimensional real (i.e. F = R) vector space. Let T be an element of L(V)(set of operators on V), and assume that T^2 = 0.
Identify the null hypothesis and the alternative hypothesis. Determine the P-value for the test. Show all work; writing the correct P-value, without supporting work, will receive no credit
choose one 1 public corporation in an industry with which you are familiar. research the company on its own website the
a 7 ft by 9 ft rectangle is similar to a second rectangle whose perimeter is 260 ft, what are the dimensions of the second triangle?
Derek established his own retirement account ten years ago. He has discovered that he can obtain a better rate for the next 10 years at 12% interest compounded semiannually
Mention 10 examples of things in your life that can be modeled mathematically and explain why each is reasonable model for a particular situation. Please do not use gas prices or $ paid per hour at a job. Ok to use word problems. Be specific and p..
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