Questions Asked on
March 28, 2014

probability
Let X and Y be independent random variables, each uniformly distributed on the interval [0,1]. Let Z=max{X,Y}. Find the PDF of Z. Express your answer in terms of z using standard notation. For 0
asked by JuanPro 
physics
Two masses are hung are connected by a light cord and hung from a frictionless pulley of negligible mad are shown. Mass m1=3.00kg and mass m2=2.00kg. When the two masses are released from rest, the resulting acceleration of the two masses?
asked by Kam 
Physics
A snowmobile, with a mass of 530 kg, applied a force of 410 N backwards on the snow. a) What force is responsible for the snowmobile’s resulting forward motion? (Hint: Think action–reaction force pairs.) b) If the force of friction on the snowmobile is
asked by Dan 
Another Physics
At some point in the combustion cycle of an engine, the temperature of a combusted airfuel mixture is 582 degrees Celsius. Given that the pressure in the mixture is 6.2 bar, determine the density of the mixture (in kilogram per cubic metre).
asked by Nick 
Algebra
Keiko is a software saleswoman. Let y represent her total pay (in dollars). Let x represent the number of copies of History is Fun she sells. Suppose that x and y are related by the equation 2200+90x=y . Answer the questions below. Note that a change can
asked by Roderick 
math
A boat needs to travel south at a speed of 20 km/h. However a constant current of 6 km/h is flowing from the southeast. Use vectors to find: a.the equivalent speed in still water for the boat to achieve the actual speed of 20 km/h. b the direction in
asked by Anonymous 
Criminal law
1. Which of the following involves rationalizing misconduct by perceiving informal norms – such as secrecy or loyalty to fellow officers – to be more important than societal laws, norms, or the formal norms of the organization by which one is employed?
asked by Amy 
Physics
The seesaw in the figure below is 4.5 m long. Its mass of 20 kg is uniformly distributed. The child on the left end has a mass of 14 kg and is a distance of 1.4 m from the pivot point while a second child of mass 39 kg stands a distance L from the pivot
asked by Patrick 
science (check please (:)
8.Which of the following would help decrease the human ecological footprint? . . . . . . . . . . . . . . . My answer: using public transportation instead of riding in a car? (I have doubts on my choice) but my other choice is using bottled water instead of
asked by luna 
CHEMISTRY
The mass of an erlenmeyer flask is 78.639g and the mass of the flask and water is 327.039. If the density of water is 1 g/ml then what is the true volume of the flask? so i had subtracted the mass of just the flask from the mass of the flask and the water
asked by Sandy 
math
Enrique charges $5 for every 1/5 hour he spends walking dogs. In the morning he walks Buttons for 2/5 hour, Bruno for 1/5 hour, and Pepper for 3/5 hour, Monday through Friday. On Saturdays he takes Mimi, Diva, and Coco to the dog park for 4/5 of an hour.
asked by suri 
math help
Enrique charges $5 for every 1/5 hour he spends walking dogs. In the morning he walks Buttons for 2/5 hour, Bruno for 1/5 hour, and Pepper for 3/5 hour, Monday through Friday. On Saturdays he takes Mimi, Diva, and Coco to the dog park for 4/5 of an hour.
asked by kartik 
Spanish
Am I correct? I. Conteste las preguntas utilizando mandatos formales. Trate de usar pronombres cuando posible. 1. ¿Es necesario apuntar la dirección? No, lo me no apunte la dirección. 2. ¿Debo sacar el plano de la ciudad? Saquelo. 3. ¿Es mejor venir
asked by Anna 
math
A model rocket is launched from a roof into a large field. The path of the rocket can be modeled by the equation y = 0.06x^2 + 9.6x + 5.4 where x is the horizontal distance, in meters from the starting point on the roof and y is the height in meters of
asked by nisa 
ALGEBRA
EVA IS JUMPING ON A TRAMPOLINE .HER HEIGHT H AT TIME T CAN BE MODELED BY THE EQUATION H=16T^2+20T+6.WOULD EVA REACH A HEIGHT OF 14 FEET
asked by Anonymous 
Science
Describe how the structure of DNA is correlated with its role as the molecular basis of inheritance in Biology.
asked by Sally 
probability
Consider n independent rolls of a ksided fair die with k≥2: the sides of the die are labelled 1,2,…,k and each side has probability 1/k of facing up after a roll. Let the random variable Xi denote the number of rolls that result in side i facing up.
asked by JuanPro 
chemistry
Pleas does any one know how to calculate the number of isomers of an organic compound. Any formula pls
asked by ogboyeb 
Geometry
A lighthouse keeper in his observation tower 120 feet above the water sees a pontoon airplane and a small fishing boat. If the plane is directly above the boat, how far above sea level is the plane flying, rounded to the nearest foot? Be sure to show your
asked by Jackie 
Math for grade 6 peace
The computer club is having a fundraiser to help pay for a trip to the science museum. So far they have raised $96, which is only 48% of their goal. How much money are they trying to raise?
asked by Kim 
science (check)
carrying capacity is the maximum number of _____ that an ecosystem can support. . . . My Answer: Individuals in a population (Is it right?)
asked by luna 
science (check)
5.Which of the following could help reduce loss of biodiversity ? A. increasing construction of tall buildings B. increasing farming operations C. increasing conservation measures***** D. Increasing the human ecological footprint
asked by luna 
math
an real raw egg was dropped from a 20 story height , however it didn't break . How is that possible ? IT LANDED on concreate solid.
asked by jassica 
Physics
Suppose we take a 1 m long uniform bar and support it at the 27 cm mark. Hanging a 0.31 kg mass on the short end of the beam results in the system being in balance. Find the mass of the beam.
asked by Christina 
Biology (fetal pig)
What substance passes through the glottis? [Is it Air??] What substances passes through the esophagus? [I don't know if this is food] please help. thanks
asked by Sarah 
Chemistry
I would really like to understand how to do these problems, because my exam is coming up in a few weeks. I still cannot comprehend how you can tell if a system is is positive or negative according to reaction. For #1, I presume it is E if it is spontaneous
asked by Rainie 
Chemistry
excess magnesium is reacted with 45 grams of sulfuric acid. 9.5 liters of hydrogen gas are collected understand conditions of temperature and pressure. what is the percentage of hydrogen sulfate and of water in the acod solution?
asked by Anonymous 
algebra
write a fourth degree polynomial function with real coefficients that has 3,1/5, and 4+i as zeros and the y intercept of (0,5)
asked by james 
algebra
Solve the following rational inequality. Write the solution in interval notation. Show the number line and breaking points or graph of the polynomial with the part of the graph that is the solution (x4)(x+2)/(x3)(x+5) ¡Ü0
asked by james 
calcules
we want to construct a box with a square base and no top. the volume of the box will be 8 cm^3 what are the dimension of the minimize the surface area .
asked by jasmine22 
probability
A fair coin is flipped independently until the first Heads is observed. Let K be the number of Tails observed before the first Heads (note that K is a random variable). For k=0,1,2,…,K, let Xk be a continuous random variable that is uniform over the
asked by JuanPro 
logic and math
Calculate the truth value (f or V) a. Is it true that if (the Papaya is a fruit from the Caricaseas or the Pitahaya is the fruit of a plat from the Cactaseas) then (el Cohombro is a fruit of a plant from the family of the Cucurbitaceas or the Nisper is a
asked by JuanPro 
chemistry
278.35g Ba3n2 to mole Ba3N2
asked by Anonymous 
Chemistry
I got think I got the following questions almost figured, but I just want someone to make sure that I am correct. 1) The whole experiment involves using the ideal gas law to predict the molar mass of an unknown liquid. The formula is molar mass of liquid =
asked by Sandy 
chemistry
Select only the True statements about buffer systems. Select all that are True. 1. Starting with NH3(aq) and adding a small amount of HCl(aq) will make a buffered solution. 2. The blood buffer, among other things, is supported by carbonic acid and its
asked by bekah 
Algebra
Can you please help me with these Algebra word problems? Complete the following word problems. 1. Tell whether the table represents inverse variation. If so, write the inverse variation equation and solve for y when x = 4. Show work that supports your
asked by Student 
Physics
A wheel of moment of inertia 0.136 kg · m2 is spinning with an angular speed of 5000 rad/s. A torque is applied about an axis perpendicular to the spin axis. If the applied torque has a magnitude of 67.8 N · m, the angular velocity of precession will be?
asked by kjean 
Statistics
Assume that adults have IQ scores that are normally distributed with a mean of 100 and a standard deviation of 15. Find the IQ score separating the top 37% from the others. Answer in one decimal place.
asked by Tracy 
science
can any of you tell me some good information about solar energy
asked by Cierra 
Algebra
Can you help me work this out with long division? r^2  7r + 12/ r+4 divided by r^2  7r +12/ r^2 + 6r +8 Thanks.
asked by Student 
Algebra
Please help me solve this problem? 3/x + 6/ x+3 = 8/ x+1 Thank you
asked by Student 
Physics
How much work is done in lifting a 6kg object from the ground to a height of 4m? A 12n object is lifted 5m how much work is done How much work is done if a 5n object is lifted from the ground to a height of 8m? How much gravitational potential energy does
asked by Derrick 
Algebra
Please help me simplify the expressions and solve the equations? 1. v^2 + v  12/ v^2 + 6v + 8 divided by 2v  6/ v +2 2. 2/ b2 = b/ b^2  3b +2 + b/ 2b  2 3. 1/ x2 + 2x/ (x2)(x8) = x/ 2(x8) 4. (m^2 + 2m + 1/ m^3 + 3m^2 + 3m +1 (m^2/m  3m/3) Thanks!
asked by Student 
science
can any of you tell me some good information about wind energy
asked by Cierra 
Math 203
A pile of gravel is conical in shape. If the diameter is approximately 6.8m and the height is 2.8m, what is the volume of gravel in the pile?
asked by canadiangoose 
Math
A pile of gravel is conical in shape. If the diameter is approximately 6.8m and the height is 2.8m, what is the volume of gravel in the pile?
asked by Jay 
language arts
6.Which of the following places events in chronological order? A.formation of Negro Leagues, invention of baseball, Civil War B.invention of baseball, Civil War, formation of Negro Leagues C.invention of baseball, formation of Negro Leagues, Civil War
asked by chris 
math help
factor: 1) (x+y)^2  (a+b)^2 = [(x+y)  (a+b)] [(x+y) + (a+b)] = [x+yab] [x+y+a+b] 2) 6x^4  6 = 6(x^4  1) = 6(x^21)(x^2+1) Is this right?
asked by sunny 
math
Kara eats 4/5 of the food that Jillian does. If kara needs to bring 14lbs of food for the week, how much does Jillian need to bring.
asked by kim 
Medical coding
Please indicate all ICD9 diagnosis and procedure codes for the coding scenarios. In addition, assign the POA indicator for each diagnosis code. 1). A patient is admitted with IDDM, out of control. The patient is administered insulin in an attempt to
asked by Frannie 
math
Enrique charges $5 for every 1/5 hour he spends walking dogs. In the morning he walks Buttons for 2/5 hour, Bruno for 1/5 hour, and Pepper for 3/5 hour, Monday through Friday. On Saturdays he takes Mimi, Diva, and Coco to the dog park for 4/5 of an hour.
asked by John 
Language arts
In "Aunt Millicent,"how does Jamie make the settings of aunt Millicent travels appear realistic?
asked by ll 
Calculus
At what interval is e^(5x^2) concave up? I know the second derivative is 100x^2*e^5x^210*e^5x^2 but I just can not figure this one out. Thank you for your help!
asked by Andrea 
math
A wood burner burns 180 pounds of wood in 5/2 days . How many pounds of wood is needed for the burner in 1 month.
asked by amisha 
Math
The cafeteria has 4 cases of tuna and 9 single cans of tuna. In all,there are 65 can of tuna. How many cans of tuna are in a case? (P.S.PLEASE SHOW WORK...I NEED HELP!Thank You!)
asked by Lauryn 
math
samantha has 28 and she gets 28 more how many would she have in all.
asked by sami 
3rd grade math
suppose there are 2 pieces of the cake left over but you don't know how many pieces there were in the whole cake. explain how you could find the number of pieces in the whole cake if taylor told you that 1/5 of the cake was left.
asked by mandie 
Math
Chads buys peanuts in 2 pound bags. How many 2 pound bags of peanut should chad buy so that he can fill the 5/6 pound bags without having any peanuts left over
asked by Elijah 
georgia history
hich of the following was a cause of the Great Depression? (Choose all that apply.) (3 points) the Stock Market Crash of 1929 Prohibition Failed crops and drought A lack of demand for goods
asked by james 
math
A ball is thrown into the air with an upward velocity of 20 ft/s. Its height (h) in feet after t seconds is given by the function h(t) = –16t^2 + 20t + 2. How long does it take the ball to reach its maximum height? What is the ball’s maximum height?
asked by Nisabel 
Pre calc
y=5tan1/2(x+pi/4) What is the period?
asked by Deena 
Math/precalc
What is the period and amplitude of y=3tan(2/3xpi/6)? Thanks!
asked by Emily 
Chemistry
Titration was used to determine the molarity of acetic acid in vinegar. A primary standard solution of KHP was used to standardize the NaOH. 1. When performing this experiment, impure KHP was used to standardize the NaOH solution. If the impurity is
asked by Sandy 
Finance
9. H Corporation is considering a training program that cost $600,000. Anticipated benefits are $60,000 in the first year, $75,000 in the second year, $85,000 in the third year, and $95,000 in the fourth year. Benefits will decline 8 percent a year after
asked by Shiva 
Finance
10. A new factory at Arcata requires an initial outlay of $3.5 million to be paid immediately. The factory will last for eight additional years, after which it can be sold for a salvage value of $2,000,000. Sales will be $800,000 during the first year of
asked by anonymous 
Science (check please)
3. Which of the following pairs of terms could be used to describe a bullfrog that is active at night and enters a state of complete inactivity during colds months? . . . My answer: Circadian rhythm and hibernation.
asked by luna 
math
J's bike has determined that when x hundred bikes are built, the average cost per bike is given by C(x)= 0.1x^21.2x+4.993, where C(x) is in hundreds of dollars. how many bikes should the shop build to minimize the average cost per bike?
asked by james 
Algebra word problem
J's bike has determined that when x hundred bikes are built, the average cost per bike is given by C(x)= 0.1x^21.2x+4.993, where C(x) is in hundreds of dollars. how many bikes should the shop build to minimize the average cost per bike?
asked by james 
Calculus
Find the area cut off by x=4 from the hyperbola x^2/9y^2/4=1. Answer is 4.982 in the book. I have proceeded as under: Y=2/3*sqrt(x^29) and rhe reqd. area is double of integral 2/3*sqrt(x^29) from 3 to 4. Int= 2/3*[xsqrt(x^29)/2 –
asked by MS 
Need 8 grade math help quick please!
I don't understand this. I don't get exactly what I'm supposed to do with the P(parenthes) thingy or how each question differs from the next. Theoretical and Experimental Probability: A number cube with the numbers 1 through 6 is rolled. Find the given
asked by Rainshine 
atomic physics
What wavelenght of radiation is necessary to ionize hydrogen.
asked by Adigun500 
atomic physics
What's the difference between excited and unexcited hydrogen?
asked by Adigun500 
chemistry
The density of 19.0% by mass of nitric acid, HNO3 is 1.11 g cm3. Calculate the volume (dm3) of acid needed to prepare 2.00 dm3 of 3.00 mol dm3 HNO3 solution. (FW HNO3 = 63 g/mol)
asked by h 
math
how many real number solutions does the equation have y = 4x^2 + 7x  8 no solutions (is it this one) one solution two solutions infinitely many solutions
asked by nisa 
Maths
What is a shape that has a 24cm2 area and a 26cm perimeter. The sides have to be 5,4 and 3cm long!!!
asked by Anonymous 
Calculus
Jesse has constructed a huge cylindrical can with a diameter of 60 ft. The can is being filled with water at a rate of 450 ft3/min. How fast is the depth of the water increasing? (Hint: The volume of water in the cylinder is determined by πr2h where r is
asked by EA 
ENG 1511
SOCIAL MEDIA HAVE MADE OUR LIVES EASIER. WRITE AN ESSAY IN WHICH YOU AGREE OR DISAGREE
asked by cindoh 
Computer Science
Computers are used worldwide, but most of the major operating systems originated in Englishspeaking countries. Take a look at the operating system that you use in the context of global users who might not speak English and who might not have grown up with
asked by Nica 
Geometry
concrete costs 105 per cubic yard. plato is making a rectangular concrete garage floor measuring 33 feet wide by 6 inches thick. how much will the concrete cost?
asked by Anonymous 
Criminal law
1. An investigator conducting a crime scene search at the scene of a violent crime has certain responsibilities and procedures to follow related to evidence collection. Of the following steps, which one is not required of the onscene investigator? A.
asked by Amy 
Physics
What capacitance in needed in series with an 785 µH inductor to form a circuit that radiates a wavelength of 199 m?
asked by Sara 
Criminal law
1. The primary purpose of psychological profiling is to provide: A.the identity of an offender involved in a violent crime such as murder or sex crime. B. absolute information about an offender’s emotional and personality character traits and to
asked by Amy 
Language Art (Please Check)
1.C 2.A 3.C 4.C 5.D 6.D 7.B 1.She was rivaling the mayor by A.sending money to him. B.voting for him. C.running against him. 2.In which of the following situations would you be most likely to be caught up in a commotion? A.a riot B.a math exam C.a school
asked by matt 
Algebra 2
Please help me solve and find the excluded values for this problem. Also please show me the work for this problem I want to learn!@!@!. 49X^6+7X^7/28X^8
asked by Omar 
Algebra 2
Please help me solve and find the excluded values for this problem. Also please show me the work for this problem I want to learn! h(x)=x^29/x^24x+3
asked by Omar 
Criminal law
1. _________ refer to the notion that basic guarantees exist and that all people possess them simply by virtue of being human. Natural rights Hypothetical imperatives Moral duties is it A 2. Much of the reasoning in the social sciences is __________, which
asked by Amy 
science(check answers)
5.A 6.A 5.The origin of the words shut and out is Old English. During the 1800s, the two words were combined to take on the baseball meaning, a game in which one side does not score. What is the most likely meaning of the word shutout in the story The
asked by matt 
Math
1. P(Number3) A.4/6 B.1/6 C.2/6 D.5/ 3. P(Complement of 4) A.1/6 B.5/6 C.2/6 D.4/6 4. A multiple choice question has 5 possible answers. What are the odds in favor of guessing the right answer? A.1:5 B.2:2 C.3:1 D.1:3
asked by CaliGirl 
probability
t the discrete random variable X be uniform on {0,1,2} and let the discrete random variable Y be uniform on {3,4}. Assume that X and Y are independent. Find the PMF of X+Y using convolution. Determine the values of the constants a, b, c, and d that appear
asked by JuanPro 
probability
Consider the random variables X, Y and Z, which are given to be pairwise uncorrelated (i.e., X and Y are uncorrelated, X and Z are uncorrelated, and Y and Z are uncorrelated). Suppose that E[X]=E[Y]=E[Z]=0, E[X2]=E[Y2]=E[Z2]=1, E[X3]=E[Y3]=E[Z3]=0,
asked by JuanPro 
Language Art (Please Check)
5.C 6.B 5.The origin of the words shut and out is Old English. During the 1800s, the two words were combined to take on the baseball meaning, a game in which one side does not score. What is the most likely meaning of the word shutout in the story The
asked by matt 
logic and math
Write the reciprocal and the antireciprocal of: That a quadrilateral has 4 equal sides, is a necessary condition for that it is a square. That a triangle has 2 equal sides, is a necessary condition for that it is isosceles. Only if f is integrable in an I
asked by JuanPro