Monday
December 22, 2014

Posts by Ray


Total # Posts: 397

Calculus,Reaction rates
A man walks across a bridge at the rate of 5 ft/s as a boat passes directly beneath him at 10 ft/s. If the bridge is 10 ft above the boat, how fast are the man and the boat separating 1 second later?
November 30, 2014

science
the relative age of a rock is
November 16, 2014

calcu
(4,-3) is on g For each of the following functions find a point on its graph. Enter exact answers. I cannot find the other three :( a) g(2x) - 5 ,(2,-8) b) 3g(x) + 1 c) -(g(1/3(x+4))-8) d) 1/2g(-5x-15)-8
October 17, 2014

Chemistry
GE's light bulb division ordered 100.kg of tungsten for the filaments. If the tungsten comes in a cube what is the volume of the cube? What is the length of each side?
September 28, 2014

English
C
September 26, 2014

Chemistry
1.630 g of iron ore is dissolved in an acidic solution. This solution is titrated to a pink endpoint with 27.15 mL of a 0.020 M KMnO4 solution. a. How many moles of MnO4- ions were consumed? b. How many moles of Fe2+ were in the iron ore sample? c. What is the percent of iron ...
September 8, 2014

algebra
43 Pictures are taken and ther is 32,680kilobytes of memory still available ,how many more pictures can they take ?
September 8, 2014

arithmetic
Amy is building a house .the basement floor is at -15feet. the roof of the house is above the ground 25 feet. express the comparison of heights as an equality . explain the meaning of the inequality
September 8, 2014

Math
Ray counted a total of 40 white cars and yellow cars. There are 9 times more white cars then yellow cars. How many white cars did Ray count.
September 4, 2014

algebra
can some explain this multiply the first equation by -10 -10x-10y=
August 25, 2014

Canadian electrical code
if the bare main contact conductors a a hoist are 21 meters long and do not have intermediate supports , the smallest copper wire that may be used for the conductors is
July 8, 2014

math
there are 4 boys at the park. some boys join them. now their 16 kids at park. how many boys joined them?
May 27, 2014

math
Jake and Sara each drive 270 miles to attend a conference. Jake drives at an average speed that is 15 mi/h slower than Sara’s average speed. It takes Jake 1.5 hours longer than Sara to drive the 270 miles. How long does it Jake to make the trip?
May 12, 2014

Statistics
Thank you!
April 20, 2014

Statistics
Recently, a university surveyed recent graduates of the English Department for their starting salaries. Four hundred graduates returned the survey. The average salary was $25,577. The population standard deviation is $2,566. What is the 95% confidence interval for the mean ...
April 20, 2014

Statistics
Thank you!!
April 20, 2014

Statistics
A survey of an urban university (population of 25,450) showed that 878 of 1,119 students sampled supported a fee increase to fund improvements to the student recreation center. Using the 95% level of confidence, what is the confidence interval for the proportion of students ...
April 20, 2014

Statistics
Thank you!
April 20, 2014

Statistics
Mileage tests were conducted on a randomly selected sample of 100 newly developed automobile tires. The results showed that the average tread life was 52,515 miles with a standard deviation of 3,550 miles. What is the best estimate of the average tread life in miles for the ...
April 20, 2014

math
manuel and ruben played dominoes 24 times. Ruben has won 16 times. estimate the odds in favor of Manuel's winning the next match.
April 17, 2014

physics
Is there a way to calculate the moment of inertia of a hanging mass (3.1 kg) without length & width dimensions?
April 1, 2014

man
How to -2x+6y=-26 8x+6y=-1 6using elimination method
March 24, 2014

math
bill and jane are 1080 miles apart. They start driving towards each other at exactly the same time. Bill travels at 70 mph. Jane travels at 65 mph. How long must they drive before they meet?
March 19, 2014

Statistics
The law of large numbers tells us what happens in the long run. Like many games of chance, the numbers racket has outcomes so variable - one three-digit number wins $600 and all others win nothing - that gamblers never reach "the long run." Even after many bets, ...
February 25, 2014

Statistics
The law of large numbers tells us what happens in the long run. Like many games of chance, the numbers racket has outcomes so variable - one three-digit number wins $600 and all others win nothing - that gamblers never reach "the long run." Even after many bets, ...
February 25, 2014

Statistics
A class survey in a large class for first-year college students asked, "About how many minutes do you study on a typical weeknight?" The mean response of the 463 students was x = 118 minutes. Suppose that we know that the study time follows a Normal distribution with...
February 25, 2014

physics
A block with a mass of 1.0kg is lifted up slowly from ground (0m) to height of 0.51m. block is slowly displaced horizontally by .10m. find total work done to displace block vertically and horizontally. Then find total work to lift block and move it horizontally.
February 16, 2014

Math
A truck with 40-in.-diameter wheels is traveling at 50 mi/h. a) Find the angular speed of the wheels in rad/min b) How many revolutions per minute do the wheels make?
February 11, 2014

Physics
A trash can with a mass of 5 kg has a coefficient of static friction of μs = 0.80 and a coefficient of kinetic friction of μk = 0.22. (The Active Figure applies to a similar situation, but the values of the mass, coefficient of static friction and coefficient of ...
February 8, 2014

Physics
Suppose a hockey puck slides down a frictionless ramp with an acceleration of 4.70 m/s2. (a)What angle does the ramp make with respect to the horizontal? (b) If the ramp has a length of 6.40 m, how long does it take the puck to reach the bottom? (c) Now suppose the mass of the...
February 6, 2014

Physics
Suppose a hockey puck slides down a frictionless ramp with an acceleration of 4.70 m/s2. What angle does the ramp make with respect to the horizontal? Please show steps...
February 6, 2014

US History
ok is there any other questions i posted you can answer?
January 8, 2014

US History
i dont have my book and i have tried looking it up on the internet but it aint answering my questions
January 8, 2014

US History
i need help on the answers i was out sick the week we did this lesson and im clueless on it
January 8, 2014

US History
i really need help with this study guide 30.) Franklin D. Roosevelt became president during the Great Depression and established the New Deal in attempts to help the country recover. The New Deal was made up of several programs that are often times nicknames the alphabet soup ...
January 8, 2014

English
1.the trip led to an argument between Helen and ____ a.I b.me 2. It was ____ who demanded an apology from the newspaper. a.we b.us 3. We appreciated ____ writing a personal letter to explain his stand on the issue. a.his b.him 4. The most outspoken critics were my sister and ...
December 6, 2013

social studies
Where can I find a good, reliable source on the internet about the Bermuda Triangle? I would like a PDF with at least a few pages and I specifically am looking for scientific explanations. Sites that end with edu or gov would be great. I have been searching the internet for ...
December 3, 2013

English
Sorry my iPad did that by itself
November 23, 2013

English
Is it passive or active voice? Many clothes (we're given) to the homeless shelter. Passive By the end of today, the students (will have mastered) the grammar. Active My aunt Margot ( has been traveling) with her daughter. Active The cookies (have been eaten) by the guests...
November 23, 2013

pyschology
Thanks for your response, Ms.Sue. But I still Dont know how to relate that to clothing. Can you please explain a bit more?
November 22, 2013

pyschology
Define what prototype is and give four examples of prototype for the category of 'clothing' I know a prototype is a typical member of a particular category, but i Dont know what would be examples for prototype in terms of clothing... Would be it: tshirt, pants, dress?
November 22, 2013

Math
Jay can deduct the amount over 7% of his gross income as medical expenses on his income tax return. If his annual salary is $18500 and his medical expenses one year were $1450 how much could he deduct on his tax return?
November 11, 2013

Chem
4.5 X 10^-12m
October 23, 2013

English
C.
October 23, 2013

physics
Object A is moving due east, while object B is moving due north. They collide and stick together in a completely inelastic collision. Momentum is conserved. Object A has a mass of mA = 17.5 kg and an initial velocity of = 8.50 m/s, due east. Object B, however, has a mass of mB...
October 10, 2013

URGENT ALGEBRA 2
well yeah but ive had this question on a past test and i dont know the answer and i keep getting it wrong can you please help me answer it correctly?
October 4, 2013

URGENT ALGEBRA 2
identify the vertex and the axis of symmetry of the graph for the function y=3(x+2)^2 a.vertex(2,-3 axis of symmetry x=2 b.vertex(-2,-3) axis of symmetry x=-2 c.vertex(2,3) axis of symmetry x=2 d.vertex(-2,3) axis of symmetry x=-2 identify the maximum or minimum value and the ...
October 4, 2013

algebra
constraints x greater than or equal to 0 y less than or equal to 8 y greater than or equal to x y greater than or equal to -1/2x+6
October 3, 2013

algebra
what is the minimum value for z=3x-1/2y over the feasibility region defined by the constraints? a.-4 b.-5 c.-3 d.-6
October 3, 2013

Math
squareroot of 8 * exponents 3
October 2, 2013

history
compare the purpose, audience, and styles of John Winthrop and Johnathan Edwards.
September 19, 2013

math
what is f(-3) if f(x)=[2x+1]+5 0 10 12 -10
September 17, 2013

math
so (2+3)(4)=2*4+3*4=6+12=18 would be a possible answer to this question?
September 17, 2013

math
Write an algebraic expression that requires each of the following properties of real numbers to simplify, in the order given: the Distributive Property, the Associative Property of Addition, the Commutative Property of Addition, and the Distributive Property. Simplify the ...
September 17, 2013

english 11
yyay i got it right thanks so much
September 11, 2013

english 11
i got it its native american oral tradition
September 11, 2013

english 11
the statement below represents which genre from the early american and colonial period? i want to explain origins of the natural origins of the natural world and its processes.(1 point) a.the poetry of anne bradstreet b.the oral tradition of native americans c.the journals of ...
September 11, 2013

us history
when i write my thesis statement where do i put it in my paper? is it the first line of paper or what?
September 10, 2013

social studies
i have look and read over everything in my book number 3 i think i got it but the other 2 im clueless
September 5, 2013

social studies
1. Explain two ways in which sectionalism caused conflict or tension in the United States during the early 1800s. Then explain how sectionalism affects economics and politics in the United States today. 2. which was more of a priority in presindents lincolns reconstruction ...
September 5, 2013

math
1. write the equation in slope-intercept form. what are the slope and y-intercept? -9x+10y=-9 2. what is the graph of the equation? -5x+y=-3 please help on these a.s.a.p thansk guys
September 4, 2013

Calculus (help steve)
i had trouble with this problem too
June 28, 2013

Set and relations
Help me understand: {5} is a subset {0,2,5} The way I read it is the only element in {5} is 5 and it is a member of the set {0,2,5}. I s this true?
June 1, 2013

math
looking for the pattern in these sequences: -2,-1,4,1,4,9,14,27,_,_,_,_
May 31, 2013

math
looking for the pattern in these sequences: -2,0,1,4,4,8,_ , _ , _, _, and so forth
May 31, 2013

math
A poll of 100 students was taken at a no-residential college to find out how they got to campus. The results were as follows: 28 said car pools;31 said buses;and 42 said they drove to school in their own car alone. In addition, 9 used both car pools and buses;10 said both car ...
May 31, 2013

math
Tickets to a show cost $10 for adults and $5 for children. The show was sold out, and the theatre has 500 seats. If the revenue collected from these ticket sales was $2900, how many adult tickets were sold?
May 31, 2013

physics
An eyepiece is made of two positive thin lenses, each of focal length f = 20 mm, separated by a distance of 16 mm. (a) Where must a small object viewed by the eyepiece be placed so that the eye receives parallel light from the eyepiece? (b) Does the eye see an erect image ...
May 29, 2013

optics
A thin, double-convex lens has a refractive index of 1.50. The radius of curvature of the front surface is 15 cm and that of the rear surface is 10 cm. See sketch. (a) How far from the lens would an image of the sun be formed? (b) How far from the lens would an image of a toy ...
May 29, 2013

chem word problem
.If a gas is cooled from 323.0 K to 273.15 K and the volume is kept constant, what final pressure would result if the original pressure was 750.0 mm Hg? Round to the nearest tenth. Don't forget the units. what should i plug in?
May 23, 2013

economics
true
May 23, 2013

CALCULUS
Lim x->4 (x^2+3x+4)/5x-12
May 8, 2013

CALCULUS
Lim x->4 (x^2+3x+4)/5x-12
May 8, 2013

CALCULUS
lim x->2 f(x) where f(x) = { x^2-x-2/ 3x-6 , x<2 } {-1 , x=2 } {x+2/4 , x>2} is f(x) continuous at x = 2 ? explain..
May 8, 2013

MATH
Solve the differential equations? (calculus) a) square root cotany/ (1+x^2)sin^5y dy/dx = e^x^3 +3x/ square root cotany b) y^2/cosx dy = e^sinx/ e^y^3-1 dx
May 8, 2013

Chem
Citric acid (H3C6H5O7) is triprotic acid which reacts with NaOH according to the balanced chemical equation shown below what volume of 0.200m Naoh is required to titrate 7.50ml of lemon juice which is 0.245 m in citric acid? H3C6H5O7+3NaOH->Na3C6H5aO7+ 3H2O
April 21, 2013

Chem
Thanks!!!
April 21, 2013

Chem
A mixture of He Ne and 3rd gas exhibit a total pressure of 486 mm hg if the partial pressure of He125mm mm hg and partial pressure of Ne is 214mm hg what is the mole fraction of the 3rd gas in container
April 21, 2013

Biochem
Answer here
April 3, 2013

Chemistry
Calculate the heat released when 454 g of steam at 100.0C condenses and then cools to 30.0C. State your answer in calories.
April 3, 2013

chemistry
The pH of a .10M HOBr solution is 4.8 1. What is [H+] in that solution? 2. What is [OBr-]? What is [HOBr]? (where do the H+ and OBr ions come from?) 3. what is the value of Ka for HOBr? what is the value for pKa?
April 2, 2013

physics
A battery with an emf of 14.5 V and internal resistance of 0.83 Ω is connected across a load resistor R. If the current in the circuit is 0.81 A, what is the value of R?
April 1, 2013

edu
ok thank you all for your help i really appreciate it
March 26, 2013

edu
because i wanted to be sure of my answers
March 26, 2013

edu
my text says Use mentalinguistic strategies to talk explicitly about the concept of prints: "This first page is the beginning of the book." "Let's turn to the next page." "This page has lots of words in it." "Who can guess what the words ...
March 26, 2013

edu
Emergent literacy skills are enhanced by a.quantity and quality of print and audio-visual resources b. the family socio-economic status and aspirations c.engaging in literacy event with other persons especially adults d. the educational or professional level of one or both ...
March 26, 2013

geography
hurricanes and cyclones originate: a.in the tropics b.in temperate latitudes c.near the poles d.in the center of large land masses Is the answer a?
March 25, 2013

physics
A hypodermic syringe is attached to a needle that has an internal radius of 0.303 mm and a length of 3.02 cm. The needle is filled with a solution of viscosity 2.00 10-3 Pa · s; it is injected into a vein at a gauge pressure of 16.1 mm Hg. Ignore the extra pressure ...
March 22, 2013

physics
At the surface of a freshwater lake the pressure is 102 kPa. (a) What is the pressure increase in going 34.7 m below the surface? b) What is the approximate pressure decrease in going 33 m above the surface? Air at 20° C has density of 1.2 kg/m3.
March 22, 2013

edu
By text states what i posted above. I am just willing to understand why the answer is C because i was leaning toward B
March 9, 2013

edu
The middle-class preference for relatively small nuclear families consisting of mother, father,(or a single mother),and two or three children, is unusual when compared with families from most other non-European backgrounds. Most cultures include maternal or paternal ...
March 9, 2013

edu
that really doesn't say much
March 9, 2013

edu
Which of these scenarios best describes a nuclear family? A) Jeremiah is growing up within a cluster of adults and children who maintain their own living quarters but come together for work and meals. Child-rearing is a shared responsibility. B) The Farrish family is comprised...
March 9, 2013

edu
I would go with B
March 8, 2013

edu
yes i read a little in the text
March 8, 2013

edu
A 1992 finding by researchers Dickinson et al. about the language prompts used by low-income caregivers revealed a need for training in: A. approaches for eliciting more referential language and labels. B. expanding question formats to obtain a child's elaborations and ...
March 8, 2013

edu
ok thank you for your help
March 8, 2013

edu
A parent from a non-mainstream culture complains to the program director that her son is being negatively singled out by his teacher. The director would do well, as a first step, to address the complaint by: a. backing the teacher's position and action b. setting a meeting...
March 8, 2013

edu
Which statements best express the strategy of semantic extension? a. The teacher uses redundancy to teach new vocabulary b. A mother says the same word twice in succession when speaking to her child c. Semantic extension involves the repetition of words & sentences, recasting ...
March 7, 2013

edu
7.Which one of the following conditions Fails to foster good communicative interaction in an early learning setting? a. The teacher repeats every thing a child says, but in the proper English form. b. At least during the time the child is in the early care environment, the ...
March 7, 2013

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