Mathematics problem solving
178175 questions • Page 137 / 3564
1. 4. A well-circulated pond contains 1 million L of water that contains a pollu
1. 4. A well-circulated pond contains 1 million L of water that contains a pollutant ata concentration of 0.01 kg/L. Pure water enters from a stream at 100 L/h. Waterevaporates fr…
1. 45% of koi fish (Cyprinus carpio) are orange, and the rest are multicolored.
1. 45% of koi fish (Cyprinus carpio) are orange, and the rest are multicolored. Some of the species is infected with a particular virus, but that seems to vary by color. Only 10% …
1. 46% is a parameter and represents an estimate of the unknown value of a stati
1. 46% is a parameter and represents an estimate of the unknown value of a statistic of interest. 2. In a survey of sleeping habits, 8400 adults were selected randomly and contact…
1. 5. Two trucks were driven on a 1,680 kilometer (km) trip. The first truck ave
1. 5. Two trucks were driven on a 1,680 kilometer (km) trip. The first truck averaged 14 km per liter of fuel for the trip, and the second averaged 12 km per liter. The second tru…
1. 5. What is the tension on the rope? A 120 N trash can is pulled at constant s
1. 5. What is the tension on the rope? A 120 N trash can is pulled at constant speed by a force of 25 N as shown below. How large is the force of friction impeding the motion of t…
1. 5/10 points | Previous Answers WaneFMAC5 12.1.002. My Notes Ask Your Teacher
1. 5/10 points | Previous Answers WaneFMAC5 12.1.002. My Notes Ask Your Teacher Locate and dassify all extrema in the graph. (By dassifying the extrema, we mean listing whether ea…
1. 500 students took a chemistry test. You sampled 100 students to estimate the
1. 500 students took a chemistry test. You sampled 100 students to estimate the average score and the standard deviation. How many degrees of freedom were there in the estimation …
1. 57% of men consider themselves professional baseball fans. You randomly selec
1. 57% of men consider themselves professional baseball fans. You randomly select 10 men and ask if each considers himself a professional baseball fan. Find the probability that t…
1. 80% of the children spend at least how long per day unsupervised? 2. C. How l
1. 80% of the children spend at least how long per day unsupervised? 2. C. How long do the longest 20% of pregnancies last D. What are the quartile of the distribution of lengths …
1. 910 randomly sampled registered voters from Tampa, FL were asked if they thou
1. 910 randomly sampled registered voters from Tampa, FL were asked if they thought workers who have illegally entered the US should be (i) allowed to keep their jobs and apply fo…
1. 98%,n = 54 2. 99.5%,n=31 Solution since sample size is greater than 30, we ca
1. 98%,n = 54 2. 99.5%,n=31 …
1. 98%,n = 54 2. 99.5%,n=31 Solution since sample size is greater than 30, we ca
1. 98%,n = 54 2. 99.5%,n=31 …
1. > 1/9 points | Previous Answers IMy Notes o Ask Your Teache Sue and Ann are t
1. > 1/9 points | Previous Answers IMy Notes o Ask Your Teache Sue and Ann are taking the same English class and decide to study together. The probability that Sue makes an A i…
1. A (n) _________________ hypothesis is a hypothesis that stands in opposition
1. A (n) _________________ hypothesis is a hypothesis that stands in opposition to the null hypothesis. 2. An alternative or research hypothesis that specifies the nature or direc…
1. A (n) ____________________ hypothesis is a hypothesis that stands in oppositi
1. A (n) ____________________ hypothesis is a hypothesis that stands in opposition to the null hypothesis. 2. An alternative or research hypothesis that specifies the n…
1. A 10-foot plank is leaning against a wall. If at a certain instant the bottom
1. A 10-foot plank is leaning against a wall. If at a certain instant the bottom of the plank is 3 feet from the wall and is being pushed toward the wall at the rate of 1/3 foot/s…
1. A 120-gal tank contains 90 lb of salt dissolved in 90 gal of water. Brine con
1. A 120-gal tank contains 90 lb of salt dissolved in 90 gal of water. Brine containing 2 lb/gal of salt flows into the tank at the rate of 4 gal/min, and the well-stirred mixture…
1. A 2014 study by the reputable Gallup organization estimates that 44% of U.S.
1. A 2014 study by the reputable Gallup organization estimates that 44% of U.S. adults are underemployed. Underemployed means the person wants to work full time but is employed pa…
1. A 25 mm hose is used to siphon water from a tank. a. How long does it take to
1. A 25 mm hose is used to siphon water from a tank. a. How long does it take to fill a 10 liter bucket? b. As water rises in a siphon tube its pressure drops. It i…
1. A 3 x 5 table is considered to test the association of two variables having 3
1. A 3 x 5 table is considered to test the association of two variables having 3 and 5 categories respectively. A Chi-square test statistic with value 19.0 was obtained. What is t…
1. A 3 x 5 table is considered to test the association of two variables having 3
1. A 3 x 5 table is considered to test the association of two variables having 3 and 5 categories respectively. A Chi-square test statistic with value 19.0 was obtained. What is t…
1. A 30 V battery is connected to a resistor that is rated at 250 with a mass of
1. A 30 V battery is connected to a resistor that is rated at 250 with a mass of 0.5 grams and a length of 1 cm. What magnetic field strength will cause this resistor to "levitate…
1. A 30 mA current source with an internal resistance ( R S ) of 300 ? is connec
1. A 30 mA current source with an internal resistance (RS) of 300 ? is connected to a 600 ? load (RL). The voltage drop across the load (VL) is 8 V 12 V 6 V 3 V 2. A 15-V voltage …
1. A 40 foot ladder just reaches the top of a building and forms an angle of 47.
1. A 40 foot ladder just reaches the top of a building and forms an angle of 47.1° with the wall of the building. How many feet tall is the building? Round your answer to the near…
1. A 95% confidence interval to estimate a populationparameter from a large samp
1. A 95% confidence interval to estimate a populationparameter from a large sample is approximately four standard errorswide. True 2. For low degrees of freedom the t-distribution…
1. A 95% confidence interval to estimate a populationparameter from a large samp
1. A 95% confidence interval to estimate a populationparameter from a large sample is approximately four standard errorswide. True 2. For low degrees of freedom the t-distribution…
1. A BOX CONTAINS 3 YELLOW, 2 BLUE, AND 4 REDPENCILS. SUPPOSE YOU CHOOSE A PENCI
1. A BOX CONTAINS 3 YELLOW, 2 BLUE, AND 4 REDPENCILS. SUPPOSE YOU CHOOSE A PENCIL, REPLACE, THEN CHOOSE ANOTHER.FIND THE PROBABILITY OF CHOOSING YELLOW, THEN RED. 2. REFER TO PR…
1. A Boy found a bicycle lock for which thecombination was unknown. The correct
1. A Boy found a bicycle lock for which thecombination was unknown. The correct combination is afour-digit number,d1d2d3d4, wheredi, i = 1,2,3,4, is selected from 1,2,3,4,5,6,7…
1. A Boy found a bicycle lock for which thecombination was unknown. The correct
1. A Boy found a bicycle lock for which thecombination was unknown. The correct combination is afour-digit number,d1d2d3d4, wheredi, i = 1,2,3,4, is selected from 1,2,3,4,5,6,7…
1. A Car Loan: Suppose the amount of principal left to be paid back on a car loa
1. A Car Loan: Suppose the amount of principal left to be paid back on a car loan is given by P(t) and suppose a payment of k dollars is made on the loan each month. Then the rate…
1. A DIE IS ROLLED ONCE. FIND THE PROBABILITY OF ROLLING A2. 2. AN UNFAIR DIE HA
1. A DIE IS ROLLED ONCE. FIND THE PROBABILITY OF ROLLING A2. 2. AN UNFAIR DIE HAS TWO 6s, a 3, a 4, a 5, but no 1. WHAT ISTHE PROBABILITY OF ROLLING A 5 OR 1? 3. A DIE IS ROLLED…
1. A Gray code is a listing of all binary vectors (0, 1)\" so that adjacent vect
1. A Gray code is a listing of all binary vectors (0, 1)" so that adjacent vectors in the list differ in exactly one position. For instance 00,01,11, 10 is a Gray code for n 2 (a)…
1. A Lorenz curve L describes the income inequality of a group. For each input x
1. A Lorenz curve L describes the income inequality of a group. For each input x, L(x) is the percentage of wealth controlled by the poorest fraction x of the group. For instance,…
1. A Los Vegas handicapper can correctly predict the winning professional footba
1. A Los Vegas handicapper can correctly predict the winning professional football team 70% of the time. What is the probability that she is wrong in her next prediction? 2. For t…
1. A PGA (Professional Golf Association) tournament organizer is attempting to d
1. A PGA (Professional Golf Association) tournament organizer is attempting to determine whether hole (pin) placement has a significant impact on the average number of strokes for…
1. A PGA (Professional Golf Association) tournament organizer is attempting to d
1. A PGA (Professional Golf Association) tournament organizer is attempting to determine whether hole (pin) placement has a significant impact on the average number of strokes for…
1. A Roulette wheel has 38 slots numbered 0 to 36 and 00. The wheel is spun and
1. A Roulette wheel has 38 slots numbered 0 to 36 and 00. The wheel is spun and a ball is thrown into the wheel and comes to rest in one of the slots. There are numerous of ways…
1. A STAT 200 instructor wants to know if her students tend to score higher on t
1. A STAT 200 instructor wants to know if her students tend to score higher on the midterm exam than on the final exam. Data were collected from a representative sample of 46 stud…
1. A Small manufacturing company will start opening a night shift. There are 20
1. A Small manufacturing company will start opening a night shift. There are 20 machinists employed by the company. a.If the night crew consists of 3 machinists, how many differen…
1. A Soft Start uses an SCR (silicon-controlled rectifier) to turn on an AC Moto
1. A Soft Start uses an SCR (silicon-controlled rectifier) to turn on an AC Motor using three phase 480 VAC. Describe the use of the SCR in this device. a. The SCR will shut down …
1. A Student has applied for a job with two companies: X and Y. The graduate fee
1. A Student has applied for a job with two companies: X and Y. The graduate feels that she has a 60% chance of receiving an offer from Company X and a 40% chance of receiving an …
1. A Student has applied for a job with two companies: X and Y. The graduate fee
1. A Student has applied for a job with two companies: X and Y. The graduate feels that she has a 60% chance of receiving an offer from Company X and a 40% chance of receiving an …
1. A Type I error in a test of hypothesis occurs (a) if we do not reject H0 when
1. A Type I error in a test of hypothesis occurs (a) if we do not reject H0 when H0 is really true (b) if we do not reject H0 when Ha is really true (c) if we reject H0 when Ha is…
1. A Type II error is made when A. we fail to reject the null hypothesis and the
1. A Type II error is made when A. we fail to reject the null hypothesis and the null hypothesis is false. B. we fail to reject the null hypothesis and the null hypothesis is true…
1. A \"best-fit\" mathematical equation for the values of two variables, r and y
1. A "best-fit" mathematical equation for the values of two variables, r and y, is called A. correlation amalysis B. scatter diagram. C. regression analysis D errors of prediction…
1. A \"best-fit\" mathematical equation for the values of two variables, r and y
1. A "best-fit" mathematical equation for the values of two variables, r and y, is called A. correlation amalysis B. scatter diagram. C. regression analysis D errors of prediction…
1. A ________ ________ is a listing of the observed values and the corresponding
1. A ________ ________ is a listing of the observed values and the corresponding frequency of occurence of each value. (Note: type one word per blank) 2. Graphs called_______…
1. A ___________ is a range of values that probably contains the population valu
1. A ___________ is a range of values that probably contains the population value. 2. Setting the ______ to 0.05 means that over the long run the researcher is willing to be wrong…
1. A bag contains 10 black marbles, 8 red marbles, 7 yellow marbles. If one marb
1. A bag contains 10 black marbles, 8 red marbles, 7 yellow marbles. If one marble is drawn from the bag then replaced, what is the probability of drawing a black marble then a ye…
1. A bag contains one green marble, two yellow marbles, four blue marbles, and f
1. A bag contains one green marble, two yellow marbles, four blue marbles, and five red marbles. a. What is the theoretical probability of randomly drawing a blue marble from the …
Subject
Mathematics problem solving
Use Browse or pick another subject.