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General
4 months ago
Sarah took the advertising department from her company on a round trip to meet with a potential client. Including Sarah a total of 1313 people took the trip. She was able to purchase coach tickets for $260260 and first class tickets for $11001100. She used her total budget for airfare for the trip, which was $10 comma 94010,940. How many first class tickets did shebuy? How many coach tickets did she buy?
General
4 months ago
" According to the U.S. Census Bureau, the population of the United States in 2010 was 308.75 million people. The rate of growth in population was 0.57% per year. Assume that this rate of growth remains the same through 2015. Explain why the population is an exponential function of time.What would you predict the U.S. population to be in 2015? (Round your answer to two decimal places.)"
General
4 months ago
A bus arrives every 10 minutes at a bus stop. Itis assumed that the waiting time for a particular individual is a random variable with a continuous uniformdistribution.(a) What is the probability that the individual waitsmore than 7 minutes?(b) What is the probability that the individual waitsbetween 2 and 7 minutes?
General
4 months ago
A statistics teacher taught a large introductory statistics class, with 500 students having enrolled over many years. The mean score over all those students on the first midterm was ????=78 with standard deviation ????=10 . One year, the teacher taught a much smaller class of only 25 students. The teacher wanted to know if teaching a smaller class was more effective and students performed better. We can consider the small class as an SRS of the students who took the large class over the years. The average midterm score was x¯=83 . The hypothesis should be:
General
4 months ago
The random variable X has the following probability mass function.X -1 0 2 6 7P(x) 0.3 0.1 0.3 0.2 0.1Answer the next 4 questions.5. Find the probability P( -1 < X ≤ 2) = ______6. Find the cumulative distribution function F(x) and calculate F(3.2) = _____________7. E(X) = ___________8. Var(X) = __________
General
4 months ago
A local hamburger shop sold a combined total of 816 hamburgers and cheeseburgers on Monday. There were 66 more cheeseburgers sold than hamburgers. How many hamburgers were sold on Monday? Identify your variables. Write an equation, then solve for the answer. _______________hamburgers
General
4 months ago
Error Degrees of Freedom are calculated as n - p - 1 for multiple regression models. The p represents the number of coefficients (not including the intercept) in the estimated model. Part A: Report the Error Degrees of Freedom for this example: Assume 160 observations are used to estimate a model with 2 numerical explanatory variables both with a linear relationship to the response and 1 categorical explanatory variable. The categorical variable has 4 levels. Part B: Assume 160 observations are used to estimate a model with 2 numerical explanatory variables both with a linear relationship to the response. In addition there is one categorical variable with 3 levels and another categorical variable with 4 levels. Report the Error Degrees of Freedom
General
4 months ago
Based on survey results, the mean amount of credit card debt for U.S. adults under 35 is $8,724. This point estimate would be unbiased and most accurate if the survey were based on which of the following? A. O A random sample of 1,500 U.S. adults under 35 B. O A random sample of 2,800 U.S. adults under 35 C. O A random sample of 3,000 U.S. college students D. O A national television news station poll with 3,500 responses
General
4 months ago
Let L be the line parametrized by x = 2 + 2t, y = 3t, z = −1 − t. (a) Find a linear equation for the plane that is perpendicular to L and includes the point (2, 0, −1). (b) Where does L intersect the plane x + 2y + 3z = 9?
General
4 months ago
If ΔGET≅ΔMAP, then what corresponding parts are congruent?
General
4 months ago
Hugo’s friends bought used books at the yard sale Sonia paid 2.25 John paid 6.00 and Keisha paid 3.75 how many books did each friend buy
General
4 months ago
∠E and ∠F are vertical angles with m∠E=8x+8 and m∠F=2x+38 . What is the value of x? Enter your answer in the box.
General
4 months ago
hard question ! Jessica is selling books during the summer to earn money for college. She earns a commission on each sale but has to pay for her own expenses. After a month of driving from neighborhood to neighborhood and walking door-to-door, she figures out that her weekly earnings are approximately a linear function of the number of doors she knocks on. She writes the equation of the function like this: E(x) = 20x - 50, where x is the number of doors she knocks on during the week and E(x) is her earnings for the week in dollars. Which of the following are reasonable interpretations of the y-intercept of Jessica's function? Check all that apply. A. Her expenses are $50 per week. B. She can earn $20 per week even if she does not knock on any doors. C. If she does not knock on any doors at all during the week, she will lose $50. D. She will lose $20 per week if she does not knock on any doors.
General
4 months ago
what are the zeros of the quadratic function f(x)=8x2-16x-15
General
4 months ago
Help please!! A bacteria culture is started with 300 bacteria. After 4 hours, the population had grown to 500 bacteria. If the population grows exponentially. a: write a recursive formula for the number of bacteria. b: write an explicit formula for the number of bacteria. c: if this trend continues, how many bacteria will there be in 1 day?
General
4 months ago
Michael is walking from home to work. The function graphed represents the remaining distance to his work, in kilometers, x hours after he starts walking.What is the meaning of each key feature of the graph?Drag the answer into the box to match each item.
General
4 months ago
−7x−50≤−1 AND−6x+70>−2
General
4 months ago
On a hike, each hiker carries the items shown. Write an expression in simplest form that represents the weight (in pounds) carried by x hikers. Interpret the expression.
General
4 months ago
What is the greatest whole number that rounds to 54’300
General
4 months ago
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