Mathematics problem solving
178175 questions • Page 122 / 3564
1) consider the following separation of materials. state weather a physical proc
1) consider the following separation of materials. state weather a physical process or chemical reaction is involved in each separation? a. sodium metal is obtained from the subst…
1) derive the expression for the critical radius of insulation for a sphere. 2)
1) derive the expression for the critical radius of insulation for a sphere. 2) A homegeneous sphere of radious a is heate…
1) derive the expression for the critical radius of insulation for a sphere. 2)
1) derive the expression for the critical radius of insulation for a sphere. 2) A homegeneous sphere of radious a is heated for a long time by heat sources uniformly distruted thr…
1) described the concept of a discrete probability distribution, and then descri
1) described the concept of a discrete probability distribution, and then described the binomial probability distribution. Are all discrete probability distributions binomial? Why…
1) determine an equivalent expression to sin(2x-pi) a) 2sinxcosx b) -2sinxcosx c
1) determine an equivalent expression to sin(2x-pi) a) 2sinxcosx b) -2sinxcosx c) cos^2x - sin^2x d) sin^2x - cos^2x 2) A fair coin is tossed 60 times. Using the n…
1) f(x) = x2 ? 7x + 12, find f(?a), f(a ? 3), and f(a + h). 2) Find for the func
1) f(x) = x2 ? 7x + 12, find f(?a), f(a ? 3), and f(a + h). 2) Find for the function. f(x) = ?2x2 ? 3 3)Suppose that the cost function for producing a certain item is C (n) = 2n ?…
1) f(x)=1/x^2 -4 has a removable discontinutiy at x=2. (A) True (B) False 2) lim
1) f(x)=1/x^2 -4 has a removable discontinutiy at x=2. (A) True (B) False 2) lim as x approaches to zero 1-cosx/sinx=0 (A)True (B)False 3)Find the x-coordinate of each point of di…
1) find the volume and surface area of a cylinder. Use the following information
1) find the volume and surface area of a cylinder. Use the following information: Radius: 3ft, Height: 12ft. 2) find the area of a right triangle with a hypotenuse length of 7 and…
1) from a deck with 52 cards, pick 6 cards randomly. Find the probability that y
1) from a deck with 52 cards, pick 6 cards randomly. Find the probability that you get two triples 2) pick a person randomly from the 100 people. Denote the event F="the person is…
1) how long will it take $10,000 to grow to $12,000 if the investment earns inte
1) how long will it take $10,000 to grow to $12,000 if the investment earns interest at the rate of 4%/year compounded monthly? (Round your answer to one decimal place.) 2) Find t…
1) i) For the following functions, find the Inverse function. ii) A point (a,b)
1)i) For the following functions, find the Inverse function. ii) A point (a,b) on the curve is given for each function. Find the slope of the function at the point (a,b). iii) The…
1) if a data set has a distribution that is normal (or approximately normal), th
1) if a data set has a distribution that is normal (or approximately normal), then to quantify how much data is within two standard deviations from the mean, it is best to use the…
1) in the years 1997,1998,1999, and 2000, united states exports of manufactured
1) in the years 1997,1998,1999, and 2000, united states exports of manufactured goods were 550.5,552.8,565.5, and 624.0 billions of dollars. which of the following conclusions can…
1) let L be a linear operator over a finite or infinite dim complex vector space
1) let L be a linear operator over a finite or infinite dim complex vector space V, and let U be a finite dim subspace of V with dim(U) greater than or equal to 1 that is invarian…
1) let P denote the positive real numbers excluding 0, which of the following de
1) let P denote the positive real numbers excluding 0, which of the following defines a function f: P -> P which is one to one but NOT onto? a. 1/(1+ x^2) b. 1/x c. x d. x^2 e.…
1) lim as x approaches to zero (sin(4x)/x cos(x))= 2) lim as x approaches to zer
1) lim as x approaches to zero (sin(4x)/x cos(x))= 2) lim as x approaches to zero (1-cos(x)/6)= 3) lim as x approaches to zero (sin(x)/sin(-x))= 4) lim as x approaches to zero (co…
1) lim as x approaches to zero (sin(4x)/x cos(x))= 2) lim as x approaches to zer
1) lim as x approaches to zero (sin(4x)/x cos(x))= 2) lim as x approaches to zero (1-cos(x)/6)= 3) lim as x approaches to zero (sin(x)/sin(-x))= 4) lim as x approaches to zero (co…
1) pH in Rain An environmentalist wanted to determine if the mean acidity of rai
1) pH in Rain An environmentalist wanted to determine if the mean acidity of rainwater differed among Alaska. Florida, and Texas. He randomly selects five rain date records from e…
1) provide an appropriate response the set of grades from different classes isre
1) provide an appropriate response the set of grades from different classes isrecorded. in the first class, the mean is 80 and the standarddeviation is 2. in the second class, …
1) recreate the table below, which is part of the output shown above, though it
1) recreate the table below, which is part of the output shown above, though it doesn’t show any values. Based on your calculations in previous parts of question 1, fill in the m…
1) show results about functions. Counterexample : Consider the claim \"If m or n
1) show results about functions. Counterexample: Consider the claim "If m or n is even then m+3n is odd." Show that this is incorrect. Proof by contraposition: Show that if m+3n i…
1) some company claims that the defective rate for their product is most 3%. to
1) some company claims that the defective rate for their product is most 3%. to test the claim, we check 100 of the product. we set the decision making rule as: If we find the num…
1) the base of a certain solid is the region enclosed by y=1/x, y=0, x=1 and x=3
1) the base of a certain solid is the region enclosed by y=1/x, y=0, x=1 and x=3. every cross section perpindicular to the x axis is an isosceles right triangle with its hypotenus…
1) the heat evolved in calories per gram of a cement mixture is approximately no
1) the heat evolved in calories per gram of a cement mixture is approximately normally distributed. The mean is thought to be 100 and the standard deviation is 2. We wish to test …
1) the owner of a video store has determined that the cost C, in dollars, of ope
1) the owner of a video store has determined that the cost C, in dollars, of operating the store is approximately given by C(x)=2x^2-22x+600, where x is the number of videos rente…
1) the set of grades from different classes is recorded. inthe first class, the
1) the set of grades from different classes is recorded. inthe first class, the mean is 80 and the standard deviation is 2. inthe second class, the mean is 70 and the standard dev…
1) the set of grades from different classes is recorded. inthe first class, the
1) the set of grades from different classes is recorded. inthe first class, the mean is 80 and the standard deviation is 2. inthe second class, the mean is 70 and the standard dev…
1) the sum of two numbers is 64 and the difference is 6 . what are the numbers ?
1) the sum of two numbers is 64 and the difference is 6 . what are the numbers ? larger number ? smaller number ? 2) the sum of two numbers is 61. the larger number is 5 more than…
1) the top and bottom margins of a poster are 8 cm and the side margins are each
1) the top and bottom margins of a poster are 8 cm and the side margins are each 9 cm. If the area of printed material on the poster is fixed at 380 square cm, find the dimensions…
1) the variable Z has a standard normal distribution a) find the number z that h
1) the variable Z has a standard normal distribution a) find the number z that has cumulative proportion 0.78 b) find the number Z such that the event Z>z has proportion 0.22 (…
1) the variable Z has a standard normal distribution a) find the number z that h
1) the variable Z has a standard normal distribution a) find the number z that has cumulative proportion 0.78 b) find the number Z such that the event Z>z has proportion 0.22 (…
1) use Euler\'s formula to rewrite e^(i2(theta)) 2) use e^(i2(theta)) = (e^(i(th
1) use Euler's formula to rewrite e^(i2(theta)) 2) use e^(i2(theta)) = (e^(i(theta))^2 to rewrite e^(i2(theta)) in the form a + bi 3) set these answers to parts a and b (1,2) equa…
1) what a summated scale is? 2) what are diffrences between qualitative vs. quan
1) what a summated scale is? 2) what are diffrences between qualitative vs. quantitative result? 3) what are relationship between correlations and Cronbach's Alpha scores? 1) what…
1) what are the two dimensions that we use to interpret a correlation? How are t
1) what are the two dimensions that we use to interpret a correlation? How are these represented by the correlation coefficient? 2) based on the correlation coefficient, interpret…
1) what correlation obtains between the item on the left and on the right? i. be
1) what correlation obtains between the item on the left and on the right? i. being a tiger being an animal ii. being bigger than a proton …
1) what correlation obtains between the item on the left and on the right? i. be
1) what correlation obtains between the item on the left and on the right? i. being a tiger being an animal ii. being bigger than a proton …
1) what is the dollar savings when a customer receives a 14 3/4% discount on a $
1) what is the dollar savings when a customer receives a 14 3/4% discount on a $959.00 couch? 2) candy bars were selling for $1.88 each. If 14 1/4 dozen bars were sold, what was t…
1) what rule can you discover that allows you to find the limit for any problem
1) what rule can you discover that allows you to find the limit for any problem like (lim--> 4 -2 +5= 29) if written as lim --> -5 -2 +5 what issue would have arisen? …
1) why do they assume x(a) is less than x(o) ? 2) does the equation under b y +(
1) why do they assume x(a) is less than x(o) ? 2) does the equation under b y +(1-tau)y = f(t) work for any equation? asking since it says it is the general solution . 3) show …
1) z crit , t crit , z stat , or t stat ; +,-, or ± ; and blue color box answer
1) z crit , t crit , z stat , or t stat ; +,-, or ± ; and blue color box answer must be typed to either 2 or 3 deciamls depwnding on whether the z or t table appropiate.please use…
1)(20 points) Let A = [v1v2v3] with v1 = (2; 1;1)T, v2 = (0;8; 2)T and v3 = (6;5
1)(20 points) Let A = [v1v2v3] with v1 = (2; 1;1)T, v2 = (0;8; 2)T and v3 = (6;5;1)T and b = (10;3;3)T . a) Are the columns of A linearly independent? Is A invertible? b) Find the…
1)) There is a dark room and in that 3 bulbs are their. U can enter onli 1 time
1)) There is a dark room and in that 3 bulbs are their. U can enter onli 1 time in the room. their are 3 plugs outside the room, u need to find out which plug is for which blub. h…
1))) Discuss the definition of abstract data type, or ADT. Provide examples and
1))) Discuss the definition of abstract data type, or ADT. Provide examples and discuss implementation mechanisms in Java and in OOP languages in general. ------------------------…
1))) Discuss the definition of abstract data type, or ADT. Provide examples and
1))) Discuss the definition of abstract data type, or ADT. Provide examples and discuss implementation mechanisms in Java and in OOP languages in general. ------------------------…
1))Work the addition? problem, using regrouping as necessary. Convert the answer
1))Work the addition? problem, using regrouping as necessary. Convert the answer to? Hindu-Arabic form. A table of numbers and corresponding Roman symbols is shown to the right. M…
1), Betwgen 1896-when the Dow Jones index was created- and 2013, the index rose
1), Betwgen 1896-when the Dow Jones index was created- and 2013, the index rose in 66% of the years. (Sources: M. Hulbert, "What the Past Can't Tell Investors." The New York Times…
1)-I need step by step instruction how to do this problem in excel please. An in
1)-I need step by step instruction how to do this problem in excel please. An investigator wants to estimate caffeine consumption in high school students. How many students would …
1). A certain insecticide kills 70% of all insects in a laboratory experiments.
1). A certain insecticide kills 70% of all insects in a laboratory experiments. A sample of 14 insects is exposed to the insecticide in a particular experiment. What is the probab…
1). A company has fixed costs for $ 400 and marginal cost of $ 40 per item, if i
1). A company has fixed costs for $ 400 and marginal cost of $ 40 per item, if items are sold at $ 60 each, determine the cost function, revenue function and profit function. 2). …
1). A spring has a natural length of 30 cm. If a 23 -N force is required to keep
1). A spring has a natural length of 30 cm. If a 23-N force is required to keep it stretched to a length of 38 cm, how much work W is required to stretch it from 30 cm to 34 cm? (…
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