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Given the following matrix, where a is constant, find the indicated matrix:E= [ 2a 0 -a0 1 2-3 a 0 ]Bonus) E^3
General
4 months ago
6. The mean number of hours of flying time for pilots at Continental Airlines is 37 hours per month (The Wall Street Journal, February 25, 2003). Assume that this mean was based on actual flying times for a sample of 49 Continental pilots and that the sample standard deviation was 8.2 hours. 6a. At 95% confidence, what is the margin of error? Solution 5b. What is the 95% confidence interval estimate of the UB
General
4 months ago
What is the length of material in yards delivered by a roll with a speed of 290 rpm and a diameter of 46 mm? (Note: assume the roll turns for 90 seconds.)
General
4 months ago
Convert the system 3x1 5x2 -2 = 6x1 7x2 -1 to an augmented matrix. Then reduce the system to echelon form and determine if the system is consistent. If the system in consistent, then find all solutions. Augmented matrix: Echelon form: Is the system consistent? select ( Solution: (x1, x2) = + + S1 Help: To enter a matrix use [[ 1. For example, to enter the 2 x 3 matrix 2 you would type [[1,2,3),(6,5,4]1, so each inside set of [) represents a row. If there is no free variable in the solution, then type 0 in each of the answer blanks directly before each s. For example, if the answer is (x,x2)= (5,-2), then you would enter (5 +0s1,-2 + 0s1). If the system is inconsistent, you do not have to type anything in the "Solution" answer blanks. I
General
4 months ago
If i divide 3/4 with 2/5 what would the answer be
General
4 months ago
Convert the augmented matrix 4 2 -2 2 0 -2 -2 2 to the equivalent linear system. Use x1 and x2 to enter the variables x1 and x2. Note: You can earn partial credit on this problem. Preview My Answers Submit Answers You have attempted this problem 0 times. You have unlimited attempts remaining.
General
4 months ago
Nitric acid (specific gravity 1.42) costs $51.95 per liter. A student spills 5.112 kg of nitric acid in the laboratory, what is the cost of the nitric acid wasted?
General
4 months ago
Verify that the mapping z --> z^2, (2 € C) will map the line y = -3 to a parabola. Find its Cartesian equation and sketch it. Determine the direction of the movement of the image point as the pre-image point moves from left to right on the line y = -3.
General
4 months ago
How many milliliters of syrup are in a 100-ml sample containing 6.55 g of syrup per 20 mL if the syrup's specific gravity is 1.31?
General
4 months ago
Find e^cos(2+3i) as a complex number expressed in Cartesian form.
General
4 months ago
An automotive part must be machined to close tolerances to be acceptable to customers. Production specifications call for a maximum variance in the lengths of the parts of .0004. Suppose the sample variance for 30 parts turns out to be s 2 = .0005. Use = .05 to test whether the population variance specification is being violated. State the null and alternative hypotheses. H0 : σ2 Ha : σ2 Calculate the value of the test statistic (to 2 decimals). The p-value is What is your conclusion?
General
4 months ago
15. John works for the local used car dealership. His weekly salary is $375 plus a commission based on the number of cars that he sells. His commission is $80 per car for the first 7 cars sold each week. For any car over 7 sold each week, John earns a commission of $180 per car. Complete the piecewise function that can be used to calculate John's weekly salary, S, when he sells t cars each week. Note: Use the letter t as your variable
General
4 months ago
The distribution of red blood cell counts is different for men and women in a certain population. For both, the distribution is approximately Normal. For men, the middle 95% range from 4.4 to 6.0 million celisper microliter, and for women, the middle 95% have red blood cell counts between 4.3 and 5.1 million cells per microliter. Complete parts (a) and (b) below a. What is the mean for the men? Explain your reasoning. Select the correct choice below and fill in the answer box to complete your choice. Round to two decimal places as needed.) O A. The mean is million. Since the Normal distribution is symmetric about its mean, the mean is O B. The mean is million. Since the mode of the Normal distribution is equal to its mean, the O C. The mean is million. Since the mode of the Normal distribution is equal to its mean, the the lower of the boundary values for the middle 95%. mean is the higher of the boundary values for the middle 95%. mean is equal to the distance between the boundary values for the middle 95%. right in the middle, which is the average of the boundary values for the middle 95%. O D. The mean ismillion. Since the Normal distribution is symmetric about its mean, the mean is b. Find the standard deviation for the men. Explain your reasoning. The standard deviation is million. The Empirical Rule states that about 95%ofthe data fall within deviation(s). The standard deviation is found by dividing the range of the middle 95% by 1 standard deviation(s) of the mean. The middle 95% of values spans | | standard Round to two decimal places as needed.)
General
4 months ago
Pinnacle Corp. budgeted $700,000 of overhead cost for the current year. Actual overhead costs for the year were $650,000. Pinnacle's plantwide allocation base, machine hours, was budgeted at 100,000 hours. Actual machine hours were 80,000. A total of 100,000 units was budgeted to be produced and 98,000 units were actually produced. Pinnacle's plantwide factory overhead rate for the current year is?
General
4 months ago
In the game of blackjack played with one deck, a player is initially dealt 2 diferent cards from the 52 different cards in the deck A winning ℡ack ack hand is won by getting 1 of the 4 aces and 1 of 16 other cards worth 10 points. The two cards can be in any order. Find the probability of being dealt a blackjack hand. What approximate percentage of hands are winning blackjack hands? The probability is □ Type an integer or a simplified fraction) The percentage of hands that are winning blackjack hands is Round to two decimal places as needed.)
General
4 months ago
. An admissions officer has determined that the population of applicants to the MBA program has undergraduate GPA’s that are approximately normally distributed with standard deviation .45. A random sample of 25 applicants for next fall has a sample mean GPA of 3.30. Find the 95% confidence interval for the mean GPA among applicants to this MBA.2. A production process fills containers by weight. Weights of containers are approximately normally distributed. Historically, the standard deviation of weights is 5.5 ounces. (This standard deviation is therefore known.) How large a sample would be required in order for the 99% confidence interval for to have a length of 2 ounces?
General
4 months ago
The price of coffee has been steadily declining since October 2012. The International Coffee Organization (ICO) reported that the mean price for coffee in May 2013 was 126.96 U.S. cents/lb. A random sample of 34 days was obtained and the composite indicator for Brazilian Natural coffee was recorded for each. The sample mean wasx = 130.29 U.S. cents/lb.Assume the population standard deviation is 8.6 U.S. cents/lb. Is there any evidence to suggest that the mean composite indicator for Brazilian Natural is greater than 126.96? Useα = 0.05.a) Give the value of the appropriate zα or zα/2. (Round your answer to four decimal places.)b) Calculate the test statistic. (Round your answer to four decimal places.)z =
General
4 months ago
The manager at the local auto shop has found that the probability that a car brought into the shop requires an oil change is 0.61, the probability that a car brought into the shop requires brake repair is 0.39, and the probability that a car requires both an oil change and brake repair is 0.12. For a car brought into the shop, determine the probability that the car will require an oil change or brake repair.
General
4 months ago
Two rectangular properties share a common side. Lot A is 33 feet wide and 42 feet long.The combined area of the lots is 1,848 square feet. How many feet wide is Lot B? Show Work!(A) 11 feet(B) 14 feet(C) 44 feet(D) 56 feet
General
4 months ago
Match the following items.If ∠DBC = 40°, then1. m∠ECB = 40 2. m = 80 3. m = 50 4. m∠DCF = 100
General
4 months ago
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