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MATH SOLVE
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Which of the following variables are qualitative and which are quantitative? If the variable is quantitative, then specify whether the variable is discrete or continuous. A. Colors of cars in a mall parking lot. Qualitative Quantitative; discrete Quantitative; continuous B. Time it takes each student to complete a final exam. Qualitative Quantitative; discrete Quantitative; continuous C. The number of patrons who frequent a restaurant. Qualitative Quantitative; discrete Quantitative; continuous
General
2 months ago
1. Which expression is equivalent to −2.1+(−5.9)+(−3.7) ?−2.1−(5.9+3.7)−(2.1−5.9)+(−3.7)(2.1+5.9+3.7)(2.1+5.9)+(−3.7)2. Which expression is equivalent to −40+(−20)+(−60) ?−(40−20)+(−60)−20+(−40)+(−60)−40−(20−60)40+20+603. Select from the drop-down menu to correctly identify the property shown.(associative, commutative, distributive)−1.4+(−2.6+3.8)=(−1.4+(−2.6))+3.84. Select from the drop-down menu to correctly identify the property shown.(associative, commutative, distributive)−7.9+(−9.03+(−0.1))=−7.9+(−0.1+(−9.03))5. Use properties of addition to evaluate the expression.−35+7+(−15)Enter your answer in the box.
General
2 months ago
A horseman left the village A at a point with coordinates (2, 5) and began riding along a straight road whose direction was given by the vector v=6i+5j. Then at some point he turned at a right angle; he never changed direction again until he arrived in the village B at the point with coordinates (8, 12). At the point where he made the turn he buried a jar full of silver coins. Unfortunately, he forgot the coordinates of the point. Can you help him recover them?
General
2 months ago
All athletes at the Olympic games are tested for performance-enhancing steroid drug use. The imperfect test gives positive results (indicating drug use) for 90% of all steroid-users but also for 2% of those who do not use steroids (that is, the false-positive rate is 2%). Suppose that 4% of all registered athletes use steroids. If an athlete is tested negative, what is the probability that the test is wrong and he or she actually uses steroids?
General
2 months ago
Which of the following weights would you expect to be suitable for weighing on an ordinary bathroom scale? a) 2500 μg b) 5×10−4 kgc) 4×106 cg d) 5.5×108 dg e) 2.0×107 mg
General
2 months ago
what is the volume and how is it measured? 3 1/4 ft 3 ft and 3 3/4 ft.
General
2 months ago
simplify2(a-3)+4b-2(a-b-3)+5
General
2 months ago
Determine whether the given value is a statistic or a parameter. A homeowner measured the voltage supplied to his home on 27 days of a given month, and the average (mean) value is 105.2 volts. Choose the correct answer below. A. The given value is a statistic for the month because the data collected represent a sample. B. The given value is a parameter for the month because the data collected represent a sample. C. The given value is a parameter for the month because the data collected represent a population. D. The given value is a statistic for the month because the data collected represent a population.
General
2 months ago
find the functions and their domains (enter the domains in interval notation.)f(x)= x + (1/x)g(x)= x + 17 / x+2(a) f o g
General
2 months ago
X+y=525 3x+7y=2775 A.340B.280C.225D.300
General
2 months ago
consider the angles of a regular polygon. 120, (3x+5), (x), 45, 135, (x-45), and (5x) degrees. What is the value of x?
General
2 months ago
Write each interval as an inequality:(-1, 10][-3, 3](-infinity, 0] or (5, infinity)[3, infinity)(-infinity, 4)[25, 50)
General
2 months ago
The owner of a landscaping company is developing a proposal to maintain the grounds of a building. It is estimated that 75 gardening hours and 25 foreman hours will be required. The total budget for these hours is $1600. The hourly wage for a foreman is 30%, more than a gardener plus an additional $1.65 per hour. Which of the following systems of equations can be used to determine the hourly wages of a gardener, g, and a foreman, f, so the total wages are $1600?A. 25g+75f=1600 f=1.3g+1.65B. 25f+75g=1600 f=1.3g+1.65C.25g+75f=1600 g=1.3f+1.65D. 25f+75g=1600 g=1.3f+1.65
General
2 months ago
Police response time to an emergency call is the difference between the time the call is first received by the dispatcher and the time a patrol car radios that it has arrived at the scene. Over a long period of time, it has been determined that the police response time has a normal distribution with a mean of 8.9 minutes and a standard deviation of 2.0 minutes. For a randomly received emergency call, find the following probabilities. (Round your answers to four decimal places.)a) between 5 and 10 minb) less than 5 minc) more than 10 min
General
2 months ago
Set up an integral for finding the Laplace transform of f(t)=t−6. F(s)=L{f(t)}=∫BA e^(-s*t)(t-6)dt equation editorEquation Editor help (formulas) where A= 0 equation editorEquation Editor and B= INF equation editorEquation Editor . Find the antiderivative (with constant term 0) corresponding to the previous part. equation editorEquation Editor Evaluate appropriate limits to compute the Laplace transform of f(t): F(s)=L{f(t)}= equation editorEquation Editor Where does the Laplace transform you found exist? In other words, what is the domain of F(s)? equation editorEquation Editor help (inequalities)
General
2 months ago
In recent years more people have been working past the age of 65. In 2005, 27% of people aged 65–69 worked. A recent report from the Organization for Economic Co-operation and Development (OECD) claimed that percentage working had increased (USa today, November 16, 2012). The findings reported by the OECD were consistent with taking a sample of 600 people aged 65–69 and finding that 180 of them were working.a. Develop a point estimate of the proportion of people aged 65–69 who are working.b. Set up a hypothesis test so that the rejection of h0 will allow you to conclude that theproportion of people aged 65–69 working has increased from 2005.c. Conduct your hypothesis test using α 5 .05. What is your conclusion?
General
2 months ago
A student on a piano stool rotates freely with an angular speed of 2.85 rev/s . The student holds a 1.50 kg mass in each outstretched arm, 0.789 m from the axis of rotation. The combined moment of inertia of the student and the stool, ignoring the two masses, is 5.53 kg⋅m2 , a value that remains constant.As the student pulls his arms inward, his angular speed increases to 3.60 rev/s . How far are the masses from the axis of rotation at this time, considering the masses to be points
General
2 months ago
Fifty specimens of a new computer chip were tested for speed in a certain application, along with 50 specimens of chips with the old design. The average speed, in MHz, for the new chips was 495.6, and the standard deviation was 19.4. The average speed for the old chips was 481.2, and the standard deviation was 14.3.Can you conclude that the mean speed of the new chips is greater than that of the old chips?
General
2 months ago
Gears produced by a grinding process are categorized either as conforming (suitable for their intended purpose), downgraded (unsuitable for the intended purpose but usable for another purpose), or scrap (not usable). Suppose that 80% of the gears produced are conforming, 15% are downgraded, and 5% are scrap. Ten gears are selected at random. What is the probability that one or more is scrap? What is the probability that eight or more are not scrap? What is the probability that more than two are either downgraded or scrap? What is the probability that exactly nine are either conforming or downgraded?
General
2 months ago
This diagram can be used to prove the Pythagorean theorem. In analyzing this diagram, which statement represents a crucial step in proving the Pythagorean theorem using this diagram?A) Recognize that the large square on the left contains two smaller squares. B) Recognize that the purple triangles and the yellow square have equal areas. C) Recognize that the blue square and the yellow square are not equal in area. D) See that the red and purple triangles can be subtracted from both pictures.
General
2 months ago
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