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1. Simplify and evaluate: (42x3y-2z-3/x-5y8z-9)2
2. Convert to scientific notation (here you may use x as multiplication): 0.00083
3. For f(x) = 6x - 7, find f(2).
4. Perform the indicated operations: (-x2 - 6x + 3) - (-9x2 + x - 1) - (x2 + 5x - 2)
5. Use FOIL to multiply: (8x - 1)(2x + 5)
6. Multiply: (x4 - 4x2 - 5)(x2 - x + 2)
7. Multiply the polynominals: (3t - 2)(2t + 3)
8. Give an example of using the distributive property for a negative monomial times a trinomial with different signs on the terms [for example: -3x(2xy + 3y - 2x)] and show each step of the distribution. Why do you think many students make sign errors on this type of problem? What would be your advice to a student who has trouble with the signs?
A group of young businesswomen wish to open a high fashion boutique in a vacant store, but only if the average income of households in the area is at least $25,00.A random sample of 9 households showed the following results:
Each day the major stock markets have a group of leading gainers in price (stocks that go up the most). On one day the standard deviation in the percent change for a sample of 10 NASDAQ leading gainers was 15.8.
With a population standard deviation of $7810. Use α = 0.01 to test the researcher's theory. Assume wages in this industry are normally distributed, determine the 99% confidence interval of the population mean.
Describe the types of decisions that do not involve uncertainty and risk and common approaches used for analyzying them.
If one runner is selected at random, what is the probability that this runner will complete this road race in less than 231.58 minutes?
Determine the probability that person's monthly gasoline (gallon) purchases will be less than 67 gallons.
If absolute value of test statistic is less than critical value in hypothesis test decision is to?
A recent national survey found that high school students watched an average (mean) of 6.8 videos per month. A random sample of 36 college students revealed that the mean number of videos watched last month was 6.2
Give the Z score for person who scores (a) 340, (b) 310, and (c) 260. Give the raw scores for persons whose Z score on this test are (d) 2.4, (e) 1.5, (f) o, and (g) -4.5
What is the probability that a single, randomly selected piece of material will be defective? (Give the answer to two decimal places.)
An environmental agency recently claimed more than 28% of consumers have stopped buying a certain product because of environmental concerns.
The process of using sample statistics to draw conclusion about the true population parameters is called:
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