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Which of these examples is an error of addition by one?A. 27,465 +52,534 = 79,899B. 63,528 + 24,361 = 87,889C. 51,824 + 48,165 = 99,989D. 35,246 + 43,732 = 78,978
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4 months ago
The number of private investigators is expected to increase from 52,000 in 2006 to 61,000 in 2016. If there are 648,982 policeofficers in 2006, how many police officers must there be in 2016 to have a greater percent increase than that of privateinvestigators?a. 657,983b. 761,307C. 671,128d. 713 180APlease select the best answer from the choices provided0 AOBNextSave and ExitShow MeSubmitMark this and return
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4 months ago
8. A savings account earns 4% annual interest compounded quarterly. How much interest would $500 earn if it was invested for one year?* OA. $20.00 OB. $20.30 OC. $54.20 OD. $84.93 OE. $200.00
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4 months ago
The drug Clarinex is used to treat symptoms from allergies. In a clinical trial of this drug, 2% of the 1650 treated subjects experienced fatigue. Among the 1600 subjects given placebos, 1% experienced fatigue. Use a .05 significance level to test the claim that the incidence of fatigue is greater among those who use Clarinex.
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4 months ago
Pls Help A.S.A.PThanks so much
General
4 months ago
The chance that two people both have three repeat sequences at location A is 1 in 500. The chance that two people have four repeat sequences at location B is 1 in 800. What is the probability that two people have the same number of repeats in both location A and location B
General
4 months ago
Alice, Benjamin, and Carol each try independently to win a carnival game. If their individual probabilities for success are 1/5, 3/8, and 2/7, respectively, what is the probability that exactly two of the three players will win but one will lose?A. 3/140B. 1/28C. 3/56D. 3/35E. 7/40
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4 months ago
A circle is inscribed in a regular hexagon with side length 10 feet. What is the area of the shaded region? Recall that in a 30 – 60 – 90 triangle, if the shortest leg measures x units, then the longer leg measures x units and the hypotenuse measures 2x units. (150 – 75π) ft2 (300 – 75π) ft2 (150 – 25π) ft2 (300 – 25π) ft2
General
4 months ago
Solve the equation 2cos^2x + 3sinx = 3
General
4 months ago
When are two distinct nonvertical lines parallel?a) when the slopes are equalb) when the slopes are positivec) when the product of the slopes is –1d) when the slopes are opposite
General
4 months ago
A sanitation department is interested in estimating the mean amount of garbage per bin for all bins in the city. Assume the amount of garbage per bin is normally distributed. In a random sample of 40 bins, the sample mean amount is 52.8 pounds and the population standard deviation is 3.9 pounds. Construct 95% and 99% confidence intervals for the mean amount of garbage per bin for all bins in the city. Don't use 68/95/99.7 rule; instead use R to compute the quantities such as quantiles.
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5 months ago
Jolyn, a golfer, claims that her drive distance is not equal to 222 meters, on average. Several of her friends do not believe her, so she decides to do a hypothesis test, at a 5% significance level, to persuade them. She hits 11 drives. The mean distance of the sample drives is 218 meters. Jolyn knows from experience that the standard deviation for her drive distance is 14 meters. H0: μ=222; Ha: μ≠222 α=0.05 (significance level) What is the test statistic (z-score) of this one-mean hypothesis test, rounded to two decimal places? Provide your answer below:
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5 months ago
The Rockwell hardness of a metal is determined by impressing a hardened point into the surface of the metal and then measuring the depth of penetration of the point. Suppose the Rockwell hardness of a particular alloy is normally distributed with mean 68 and standard deviation 3. (a) If a specimen is acceptable only if its hardness is between 65 and 71, what is the probability that a randomly chosen specimen has an acceptable hardness? (Round your answer to four decimal places.) 0.6826 Correct: Your answer is correct.
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5 months ago
An Izod impact test was performed on 20 specimens of PVC pipe. The sample mean is x Overscript bar EndScripts equals 1.14 and the sample standard deviation is s = 0.28. Find a 99% lower confidence bound on the true Izod impact strength. Assume the data are normally distributed. Round your answer to 3 decimal places. Entry field with incorrect answer 1.319 less-than-or-equal-to
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5 months ago
What is the probability that a sample of 50 male graduates will provide a sample mean within $.50 of the population mean, $21.68? b. What is the probability that a sample of 50 female graduates will provide a sample mean within $.50 of the population mean, $18.80? c. In which of the preceding two cases, part (a) or part (b), do we have a higher probability of obtaining a sample estimate within $.50 of the population mean? Why? d. What is the probability that a sample of 120 female graduates will provide a sample mean more than $.30 below the population mean?
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5 months ago
A father and his daughter are interested in the same baseball game. The father sits next to his radio at home and listens to the game; his daughter attends the game and sits in the outfield bleachers. In the bottom of the ninth inning a home run is hit. If the father’s radio is 132 km from the radio station, and the daughter is 115 m from home plate, who hears the home run first? (Assume that there is no time delay between the baseball being hit and its sound being broadcast by the radio station). In addition, let the speed of sound in the stadium be 343 m>s.
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5 months ago
Andy and alex order prints andy orders 40 small and 10 large for 32.50 and alex orders 20 small and 8 large for 20. How much does small and large prints cost
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5 months ago
Roberto needs 10 kilograms of clay for a ceramics project. He already has three pieces that weigh 1.3 kg, 2.4 kg, and 0.9 kg. How much more clay does he need?
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5 months ago
A pair of crocs was purchases for $25. After 3 years the crocs have a value of $3. On average, theowner of the crocs wore them for 350 days per year during those 3 years. The depreciation in the valueof the crocs, per day walked in, is closest toA. 2 centsB. 3 centsC. 4 centsD. 5 centsE. 6 cents
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5 months ago
Justin and Elena each launched a toy rocket into the air. The height of Justin’s rocket is modeled by the equation h = –16t2 + 60t + 2. Elena launched his rocket from the same position, but with an initial velocity double that of Justin’s. Which equation best models the height of Elena’s rocket? h(t) = at2 + vt + h0 h = –16t2 + 60t + 4 h = –32t2 + 120t + 4 h = –32t2 + 60t + 2 h = –16t2 + 120t + 2
General
5 months ago
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