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MATH SOLVE
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The mean number of hours per day spent on the phone according to a national survey is four hours, with a standard deviation of two hours. If each time was increased by one hour, what would be the new mean and standard deviation
General
4 months ago
A 5 mile jogging path diagonal divides a rectangular park in half. The park is 4 miles long. Find the width of the park.
General
4 months ago
Determine the point estimate of the population mean and margin of error for the confidence interval. Lower bound is 16, upper bound is 28 in statcrunch
General
4 months ago
Let vector F = (6 x^2 y + 2 y^3 + 4 e^x) i + (7 e^{y^2} + 54 x) j . Consider the line integral of vector F around the circle of radius a, centered at the origin and traversed counterclockwise.(a) Find the line integral for a=1 .(b) For which value of a is the line integral a maximum?
General
4 months ago
*1 A car is driving away from a crosswalk. The distance d (in feet) of the car from the crosswalk tseconds since the car started moving is given by the formula d = t^2+3.5.a. As the number of seconds since the car started movingincreases from 1 second to 3 seconds, what is the changein the car's distance from the crosswalk?
General
4 months ago
Determine whether the given value is a statistic or a parameter. A homeowner measured the voltage supplied to his home on one day a week for a given year on one day a week for a given year, and the average (mean) value is 144.3 144.3 volts. Choose the correct answer below. A. The given value is a parameter parameter for the year year because the data collected represent a population population. B. The given value is a parameter parameter for the year year because the data collected represent a sample sample. C. The given value is a statistic statistic for the year year because the data collected represent a sample sample. D. The given value is a statistic statistic for the year year because the data collected represent a population population.
General
4 months ago
The sum of twice a larger number, x, and three times a smaller number, y, is 25 less than zero. The difference between the larger number and the smaller number is 5. Which system of equations could be used to find the value of x and y?
General
4 months ago
Respond to each of the following questions. Be sure to include and thoroughly describe each transformation.31. Describe the transformations necessary to transform the graph of f(x) to that of g(x). Hint: Be sure to include and thoroughly describe each transformation. You may use the Gizmo to check your answer. f(x) = x² and g(x) = 3(x - 1)² + 432. Given the parent function f(x) = x², define the function g(x) that transforms f(x) as follows:Reflection over the x-axisHorizontal shift left 3 unitsVertical shift up 7 units Hint: You may use the Gizmo to check your answer.
General
4 months ago
The stem-and-leaf plot above shows house sale prices over the last week in Tacoma. What was the most expensive house sold? Stem(hundred thousands) Leaf(ten thousands) 0 667778999 1 02447778889999 2 0011234445667889 3 00011226
General
4 months ago
Triangle ABC represents a metal flag on pole AD. On a windy day the triangle spins around the pole so fast that it looks like a three-dimensional shape. Which shape would the spinning flag create?
General
4 months ago
A test has multiple choice questions with 5 choices for each answer; only one answer is correct for each question.Suppose a student guesses the answer to each question. Assuming the guesses are independent, find the probabilitythat the student will not guess correctly on any one question.OO1/54/5
General
4 months ago
Identify the statements that explain why this is a binomial experiment. Select all that apply. According to an airline, flights on a certain route are on time 85% of the time. Suppose 24 flights are randomly selected and the number of on-time flights is recorded. (a) Explain why this is a binomial experiment. (b) Find and interpret the probability that exactly 18 flights are on time. (c) Find and interpret the probability that fewer than 18 flights are on time. (d) Find and interpret the probability that at least 18 flights are on time. (e) Find and interpret the probability that between 16 and 18 flights, inclusive, are on time.
General
4 months ago
The length of time Y necessary to complete a key operation in the construction of houses has an exponential distribution with mean 18 hours. The formula C = 100 + 60Y + 3Y2 relates the cost C of completing this operation to the square of the time to completion. The mean of C was found to be found to be 3,124 hours and the variance of C was found to be 28,460,160. How many standard deviations above the mean is 4,000 hours? (Round your answer to two decimal places.)
General
4 months ago
The mean cost of domestic airfares in the United States rose to an all-time high of $385 per ticket (Bureau of Transportation Statistics website, November 2, 2012). Airfares were based on the total ticket value, which consisted of the price charged by the airlines plus any additional taxes and fees. Assume domestic airfares are normally distributed with a standard deviation of $110.a. What is the probability that a domestic airfare is $550 or more (to 4 decimals)?b. What is the probability than a domestic airfare is $250 or less (to 4 decimals)?c. What if the probability that a domestic airfare is between $300 and $500 (to 4 decimals)?d. What is the cost for the 3% highest domestic airfares?
General
4 months ago
A sales representative is given a choice of two paycheck plans. One choice includes a monthly base pay of $300 plus 10% commission on his sales. The second choice is a monthly salary of $1200. For what amount of sales would the representative make more money with the first plan. All I know is this has to do with inequalities. Can someone help me because I honestly don't know.
General
4 months ago
Pedro has a total of 645 cents in dollar bills, dimes, and pennies. Which could be the money that he has?6 one dollar bills, 4 dimes, and 5 pennies6 one dollar bills, 40 dimes, and 5 pennies600 one dollar bills, 4 dimes, and 5 pennies600 one dollar bills, 40 dimes, and 5 pennies
General
4 months ago
A class voted for either rollerblading, swimming, or biking as their favoritesummer activity. If rollerblading got 14% percent of the vote and swimminggot 31%, what percentage of the class voted for biking?Help
General
4 months ago
(a)A random sample of 10 houses in a particular area, each of which is heated with natural gas, is selected and the amount of gas (therms) used during the month of January is determined for each house. The resulting observations are 138, 145, 99, 125, 144, 103, 109, 89, 122, 118. Let μ denote the average gas usage during January by all houses in this area. Compute a point estimate of μ.(b) Suppose there are 25,000 houses in this area that use natural gas for heating. Let τ denote the total amount of gas used by all of these houses during January. Estimate τ using the data of part (a).therms(c) Use the data in part (a) to estimate p, the proportion of all houses that used at least 100 therms.(d) Give a point estimate of the population median usage (the middle value in the population of all houses) based on the sample of part (a).
General
4 months ago
EXAMPLE 5 Evaluate the iterated integral 5 0 5 x sin(y2) dy dx. SOLUTION If we try to evaluate the integral as it stands, we are faced with the task of first evaluating sin(y2) dy. But it's impossible to do so in finite terms since sin(y2) dy is not an elementary function. So we must change the order of integration. This is accomplished by first expressing the given iterated integral as a double integral. Using this equation backward, we have 5 0 5 x sin(y2) dy dx
General
4 months ago
Suppose that you currently own a clothes dryer that costs $25 per month to operate A new efficient dryer costs $590 and has estimated operating cost of $15 per month. How long will it take for the new dryer to pay for itself? The clothes dryer will pay for itself in _months.
General
4 months ago
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