Which expression is represented by the diagram?0 -6-(-4)0 -8-40 - 10-4-10-(-41Mark this and returnSave and ExitNext Question solved general 9 months ago 6910

A television sports commentator wants to estimate the proportion of citizens who "follow professional football." Complete parts (a) through (c). What sample size should be obtained if he wants to be within 4 percentage points with 96% confidence if he uses an estimate of 48% obtained from a poll? What sample size should be obtained if he wants to be within 4 percentage points with 96% confidence if he does not use any prior estimates? Why are the results from parts (a) and (b) so close? Question solved general 9 months ago 2645

The Physics Club sells E = mc2 T-shirts at the local flea market. Unfortunately, the club's previous administration has been losing money for years, so you decide to do an analysis of the sales. A quadratic regression based on old sales data reveals the following demand equation for the T-shirts: q = −2p2 + 30p (9 ≤ p ≤ 15). Here, p is the price the club charges per T-shirt, and q is the number it can sell each day at the flea market. (a) Obtain a formula for the price elasticity of demand for E = mc2 T-shirts.(b) Compute the elasticity of demand if the price is set at $9 per shirt. (Round your answer to two decimal places.) Interpret the result. (c) How much should the Physics Club charge for the T-shirts to obtain the maximum daily revenue? What will the revenue be? Question solved general 9 months ago 6211

A frozen food company uses a machine that packages okra in six ounce portions. A sample of 54 packages of okra has a variance of 0.44. Construct the 98% confidence interval to estimate the variance of the weights of the packages prepared by the machine. Round your answers to two decimal places. Lower endpoint and Upper endpoint Question solved general 9 months ago 2498

Researchers are interested in the effect of a certain nutrient on the growth rate of plant seeding. Use a hydroponics grow procedure that utilized water containing the nutrient, they planted 6 tomato plants and recorded the heights of each plant 14 days after germination. those heights were 54.2, 59.8, 61.8, 63.3, 65.1, 71.4Use technology, find the 95% confidence interval for the population mean.use technology, construct a 99% confidence interval. Question solved general 9 months ago 7074

Andres boards a Ferris wheel at the 3-o'clock position and rides the Ferris wheel for multiple revolutions. The Ferris wheel rotates at a constant angular speed of 4.7 radians per minute and has a radius of 30 feet. Let t represent the number of seconds since the Ferris wheel started rotating. a. Write an expression (in terms of t) to represent the varying number of radians 8 Ryan has swept out since the ride started. Preview s height (in feet) above Preview c. Write an expression (in terms of t) to represent Ryan's height (in feet) above the ground. Question solved general 9 months ago 8888

Assume that a procedure yields a binomial distribution with n trials and the probability of success for one trial is p. Use the given values of n and p to find the mean mu and standard deviation sigma. Also, use the range rule of thumb to find the minimum usual value mu minus 2 sigma and the maximum usual value mu plus 2 sigma.n=1580,=1/4 Question solved general 9 months ago 1884

Consider a flight to be on time if it arrives no later than 15 minutes after the scheduled arrival time. The data below represents the arrival delay time in minutes. Negative numbers correspond to flights that arrived early (before the scheduled time). Use a significant level of 0.05 and the data to test the claim made by CNN that 79.5% of flights are on time. -32 -25 -26 -6 5 -15 -17 -36 -29 -18 -12 -35 2 -33 -5 0 0 -1 -33 -5 -14 -39 -21 -32 -5 -32 -13 -9 -19 49 -30 -23 14 -21 -32 11 -23 28 103 -19 -5 -46 13 -3 13 106 -34 -24 Question solved general 9 months ago 6578

Does anyone know how to do this and if so can you please help me and explain how to do it, it’ll be appreciated thank you Question solved general 9 months ago 1722

The perimeter of one of the rectangular playrooms at Miss Pittypat's Day Care is 72 feet. It's width is 10 feet. What is its area? Question solved general 9 months ago 2782

A technician compares repair costs for two types of microwave ovens (type I and type II). He believes that the repair cost for type I ovens is greater than the repair cost for type II ovens. A sample of 60 type I ovens has a mean repair cost of $85.79, with a standard deviation of $15.13. A sample of 56 type II ovens has a mean repair cost of $78.67, with a standard deviation of $17.84. Conduct a hypothesis test of the technician's claim at the 0.1 level of significance. Let μ1 be the true mean repair cost for type I ovens and μ2 be the true mean repair cost for type II ovens.Step 1 of 4: State the null and alternative hypotheses for the test.Step 2 of 4: Compute the value of the test statistic. Round your answer to two decimal places.Step 3 of 4: Determine the decision rule for rejecting the null hypothesis H0. Round the numerical portion of your answer to three decimal places.Step 4 of 4: Make the decision for the hypothesis test. Reject or Fail to Reject Null Hypothesis Question solved general 9 months ago 5544

The article "Plugged In, but Tuned Out" (USA Today, January 20, 2010) summarized data from two surveys of randomly selected kids ages 8 to 18. One survey was conducted in 1999 and the other was conducted in 2009. Data on the number of hours per day spent using electronic media, consistent with summary quantities given in the article, are below.time1999<-c(4, 5, 7, 7, 5, 7, 5, 6, 5, 6, 7, 8, 5, 6, 6)time2009<-c(5, 9, 5, 8, 7, 6, 7, 9, 7, 9, 6, 9, 10, 9, 8)Find the 99% confidence interval for the difference between the mean number of hours per day spent using electronic media in 2009 and 1999. Show all steps of the confidence interval. You may use the formula or R for calculations. Question solved general 9 months ago 8029

A firm that stocks lightbulbs gathers the following information: Demand = 19,500 units per year, Ordering cost = $25 per order, Holding cost = $4 per unit per year. The firm wants to calculate the: a) EOQ for the lightbulbs. b) Annual holding costs for the lightbulbs. c) Annual ordering costs for the lightbulbs. Question solved general 9 months ago 3759

Find the t-coordinates of all critical points of the given function. Determine whether each critical point is a relative maximum, minimum, or neither by first applying the second derivative test, and, if the test fails, by some other method.f(t)= -3t^3+2ta.) f has (a relative maximum, relative minimum, or no relative extrema) at the critical point t=________ * (smaller t-value)b.) f has (a relative maximum, relative minimum, or no relative extrema) at the crtical point t=__________* (larger t-value) Question solved general 9 months ago 5016

A CI is desired for the true average stray-load loss ? (watts) for a certain type of induction motor when the line current is held at 10 amps for a speed of 1500 rpm. Assume that stray-load loss is normally distributed with σ = 2.8. (Round your answers to two decimal places.)(a)Compute a 95% CI for ? when n = 25 and x = 51.4.(_________________, __________________) Watts(b) Compute a 95% CI for ? when n = 100 and x = 51.4.(________________________ , _____________________) watts(c) Compute a 99% CI for ? when n = 100 and x = 51.4.(___________________________, _______________________) watts(d) Compute an 82% CI for ? when n = 100 and x = 51.4.(_________________________, ___________________________) watts(e) How large must n be if the width of the 99% interval for ? is to be 1.0? (Round your answer up to the nearest whole number.) Question solved general 9 months ago 9812

A certain type of automobile battery is known to last an average of 1140 days with a standard deviation of 80 days. If 400 of these batteries are selected, find the following probabilities for the average length of life of the selected batteries. (Round your answers to four decimal places.) (a) The average is between 1128 and 1140. (b) The average is greater than 1152. (c) The average is less than 940. Question solved general 9 months ago 3308

In Jamie's class, 1/5 of the students are boys. What percent of the students in Jamie’s class are boys? A) 1.5% B) 5% C) 15% D) 20% Question solved general 9 months ago 1335

What is the midpoint of a line segment with endpoints at (3,-1) and (8, -4)? Question solved general 9 months ago 9509

3. A crate with 20 bricks weighs 167 pounds. When the same crate has 32 bricks, it weighs191 pounds. How much would the crate weigh if there were 19 bricks in the crate?Explain. Question solved general 9 months ago 9801

associated press online provided information from a fiscal analyst stating that during the past 20 years, the average after tax income of the wealthiest 1% of americans had grown from $263,700 to $677,900. what was the percent increase? Round to the nearest percent. Question solved general 9 months ago 1239