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June 19, 2013

Homework Help: Health: First Aid

Recent Homework Questions About First Aid

physics
James Bond is trying to jump from a bridge and land on the first car of a moving train that is going to pass under the bridge. The train moves at 85 km/h and the vertical height between the bridge and the top of the carriage is 15 m. if Bond gets a running start of 4.2 m/s ...
Monday, March 11, 2013 at 7:27pm

math
There was a car accident. The first car was going 50 mph before the accident occurred, and the second car was going 60 mph. When the cars were at this speed, they were 40 feet away from each other. They were accelerating 2 mph per foot. How fast were they going at impact?
Monday, March 11, 2013 at 6:37pm

Astronomy
At what cosmic time was/is star formation density at its peak? -At present time. -Within the first billion years after the Big Bang. -At about few billion years after the Big Bang. -About few billion years ago.
Monday, March 11, 2013 at 5:07pm

Physics
James Bond is trying to jump from a bridge and land on the first car of a moving train that is going to pass under the bridge. The train moves at 85 km/h and the vertical height between the bridge and the top of the carriage is 15 m. if Bond gets a running start of 4.2 m/s ...
Monday, March 11, 2013 at 4:19pm

English
Aboard at a ship’s helm, A young steersman steering with care. Through fog on a sea-coast dolefully ringing, An ocean-bell—O a warning bell, rock’d by the waves. O you give good notice indeed, you bell by the sea-reefs ringing, Ringing, ringing, to warn the ship...
Monday, March 11, 2013 at 3:17pm

valculus
A new college textbook edition typically generates most of its sales in the year of its publication. Sales drop off in subsequent years as a result of competition from the used book market. Suppose that the annual sales of a particular textbook may be modeled by S(t) = 30,000 ...
Monday, March 11, 2013 at 3:09pm

science
the decomposition of h2o2 is first order reation following up the decom position it was found that the remaining h2o2 after 45 min was 15 units from the original concentration57.5 unit calculate the rate constant
Monday, March 11, 2013 at 1:40pm

physics
A student throws two beanbags in the air, one straight up and the other one at a 30° angle from the vertical. Both beanbags are thrown with the same initial velocity and from the same height. In your own words, explain which one will come back and hit the ground first and ...
Monday, March 11, 2013 at 12:37pm

Statistics
what is the probability that your second card is heart in general regardless of the card you drew first?
Monday, March 11, 2013 at 12:19pm

physics
We know how to calculate the total resistance of the cylindrical conductor given its length, radius, and resistivity. But how do we calculate the equivalent resistance when the resistivity is not constant? For example, say the resistivity at a particular point at a distance x ...
Monday, March 11, 2013 at 10:56am

History
Imagine you are one of the factory workers at Lowell Mills tasked with creating the headline story for this month’s factory newspaper. Factory Workers—Factory Worker Template 1. First paragraph: Hook your reader into wanting to read your article. Explain the ...
Monday, March 11, 2013 at 10:28am

Stats
Suppose you have a standard deck 52 cards (4 suits: hearts, diamonds, clubs, and spades each suit has 13 cards (1/4 of the deck) and those 13 cards include one ace,and numbers 2 through 10 and 3 face cards: a jack a queen and king) suppose you pick a card at randome and then ...
Sunday, March 10, 2013 at 11:42pm

Algebra 2....
Simplify.(Is this problem more clear than the previous post?) First part.. a^4/3 times c^1/6 all over 9b^3...everything is in the parenthesis and is raised to the power of -2 MULTIPLY TO THIS SECOND SET: a^3 times b^2 all over 3c.. everything is in the parenthesis and is ...
Sunday, March 10, 2013 at 10:21pm

Calculus Derivative- Taylor Series?
let f(x)= x/x-1 find f'(x) f ''(x) and a formula for f ^ (n) * x. I found the first and second derivatives but do not know how to make a general equation for this. I have not learnt the Taylor or Maclaurin Series either. Thank you.
Sunday, March 10, 2013 at 5:37pm

Stats
Directions: Suppose you have a standard deck 52 cards (4 suits: hearts, diamonds, clubs, and spades each suit has 13 cards (1/4 of the deck) and those 13 cards include one ace,and numbers 2 through 10 and 3 face cards: a jack a queen and king) suppose you pick a card at ...
Sunday, March 10, 2013 at 3:34pm

physics
The unitary rotation corresponding to this gate looks as follows: (assuming the first qubit is the control qubit)⎛⎝⎜⎜⎜​;⎜⎜⎜⎜⎜[​16;⎜⎜10000100001000010000000​0000000000000000000000000A&#...
Sunday, March 10, 2013 at 2:01pm

Algebra 1
Sarah took the advertising department from her company on a round trip to meet with a potential client. A total of 9 people took the trip. She was able to purchase coach tickets for \$380, and first class tickets for \$1070. She used her total budget for airfare for the trip, ...
Sunday, March 10, 2013 at 1:53pm

Mathematics. Geometric sequences.
2+4+8+...is a geometric sequence. Prove the sum of the first n terms is two less than the (n+1)the term.
Sunday, March 10, 2013 at 1:46pm

Khudu secondary
Car A of mass 1 000 kg,stationary at a traffic light,is hit from behind by car B of mass 1 200 kg,traveling at 18 m.s-1. Immediately after the collision car A moves forward at 12 m.s-1. 1. Assume that linear momentum is conserved during this collision. Calculate the speed of ...
Sunday, March 10, 2013 at 8:02am

chemistry
Plastic articles can be chromium-plated by coating them with thin layer of graphite paste,placing them in a bath of aqueous chromium(III) sulphate and electroplating. a)Suggest a reason why the article is first coated with graphite. b)what substance could be used for the other...
Sunday, March 10, 2013 at 6:39am

1. An entrepreneur is an individual who has worked for a nonprofit organization for his entire career. (Points : 1) True False 2. In analyzing factors of production that make a country "rich," it has been observed that some relatively poor countries often have plenty...
Sunday, March 10, 2013 at 4:47am

Maths
Chris spent 1/4 of his money to buy shirt .He spent 1/2 of remaining money to buy shorts.Given that Chris had left \$56 left. How mush money did he at first?
Sunday, March 10, 2013 at 3:03am

Budgeting
A quaint but well-established coffee shop, the Hot New Café, wants to build a new café for increased capacity. It’s expected sales are \$800,000 for the first 5 years. Direct costs including labor and materials will be 50% of sales. Indirect costs are ...
Saturday, March 9, 2013 at 9:20pm

Algebra
Parking in a student parking lot costs 2.00 for the first half hour and \$1.75 for each hour thereafter. A partial hour is charged the same as a full hour. What is the longest time a student can park for \$9.00? Show your work.
Saturday, March 9, 2013 at 6:14pm

1.) Two people of the same mass climb the same flight of stairs. The first person climbs the stairs in 25 s; the second person does so in 35 s. a) Which person does more work?Explain b) Which person produces more power?Explain 2.) Lee pushes a 20 kg mass 10 m across a floor ...
Saturday, March 9, 2013 at 5:27pm

Math
Sum the first two odd numbers, then the first three, the first four, and so on. From these observations could you guess the sum of the first 100 odd numbers? So the first two odd numbers are
Saturday, March 9, 2013 at 12:40pm

Physics
Jane weighs 150 lbs and bob weighs 220 , they try skydiving , if they jump at the same time , who reach the ground first /
Friday, March 8, 2013 at 7:16pm

Math
A new section of freeway will be 8 1/2 mi long. During the first month of construction, 2 7/10 mi were built. During the second month, 3 3/5 mi were built. How many more miles were left to build?
Friday, March 8, 2013 at 6:01pm

Math
A new section of freeway will be 8 1/2 mi long. During the first month of construction, 2 7/10 mi were built. During the second month, 3 3/5 mi were built. How many more miles were left to build?
Friday, March 8, 2013 at 5:53pm

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...
Friday, March 8, 2013 at 3:27pm

median help
Pat recorded the weights of the first ten fish she caught and released at Mirror Lake this season. The weights were 8 lb, 6 lb, 9 lb, 6 lb, 7 lb, 5 lb, 7 lb, 6 lb, 23 lb, and 6 lb. What is the median of the data set
Friday, March 8, 2013 at 3:19pm

math help
Pat recorded the weights of the first ten fish she caught and released at Mirror Lake this season. The weights were 8 lb, 6 lb, 9 lb, 6 lb, 7 lb, 5 lb, 7 lb, 6 lb, 23 lb, and 6 lb. What is the median of the data set
Friday, March 8, 2013 at 3:09pm

math
Alan and Bob are playing with numbers. Starting with the number n=1 they take turns performing arithmetic manipulations with n. Alan goes first and always multiplies n by 3. Bob adds 1 or 2 to the number n, depending on a coin toss. A number is called reachable, if it can ...
Friday, March 8, 2013 at 11:22am

math
The first term of a an infinite sequence is an equilateral triangle inscribed in a circle. The triangle has side n. Each new polygon in the sequence is formed by replacing the middle third of each side by two segments that have the same length as each third. As n, increases ...
Friday, March 8, 2013 at 8:56am

Finance
An insurance company is offering a new policy to its customers. Typically, the policy is bought by a parent or grandparent for a child at the child's birth. The details of the policy are as follows: The purchaser (say, the parent) makes the following six payments to the ...
Friday, March 8, 2013 at 4:36am

math
what formula i need to use in solving binomial theorem and what is the first step i need to do?
Friday, March 8, 2013 at 4:12am

homework
A trigangular region of a community college parking lot was measured. The measure of the first angle of this triangle is doubled the measure of the second angle. The measure of the third angle is 89 degree greater than double the measure of the first angle. what is the ...
Friday, March 8, 2013 at 2:53am

Algebra
Alan and Bob are playing with numbers. Starting with the number n=1 they take turns performing arithmetic manipulations with n. Alan goes first and always multiplies n by 3. Bob adds 1 or 2 to the number n, depending on a coin toss. A number is called reachable, if it can ...
Thursday, March 7, 2013 at 10:46pm

Chemistry
When a diprotic acid, H2A, is titrated by NaOH, the protons on the diprotic acid are generally removed one at a time, resulting in a pH curve that has the following generic shape. (a) Notice that the plot has essentially two titration curves. If the first equivalence point ...
Thursday, March 7, 2013 at 9:57pm

English
1.Rob or Fred ____ basketball after school. (plays play) plays 2.The teacher or the students ____ the display to visitors. (explain explains) explain 3.Neither Grace nor Kirk ___ the name. (remember remembers) remember 4.A laboratory and an office ____ on the first floor. (is ...
Thursday, March 7, 2013 at 9:39pm

Chemistry
Oxidation of bis(bipyridine) copper (I) ion by molecular oxygen is described by the equation: Cu(C10H8N2)2+(aq) + O2(aq) ----products The reaction is first order in oxygen and second order in Cu(C10H8N2)2+ (a) Write the rate law (b) What is the overall reaction order? (c) How ...
Thursday, March 7, 2013 at 9:36pm

Physics
Two flat surfaces are exposed to a uniform, horizontal magnetic field of magnitude 0.79 T. When viewed edge-on, the first surface is tilted at an angle of 26° from the horizontal, and a net magnetic flux of 9.2 x 10-4 Wb passes through it. The same net magnetic flux passes...
Thursday, March 7, 2013 at 8:47pm

Geometry
The sum of four numbers is 771. The ratio of the first to the second is 2:3. The ratio of the second to the third is 5:4. The ratio of the third to the fourth is 5:6. Find the second number.
Thursday, March 7, 2013 at 6:33pm

Algebra 2
Because of friction and air resistance, each swing of a pendulum is a little shorter than the previous one. The lengths of the swings form a geometric sequence. Suppose the first swing of the pendulum has an arc length of 100 cm and a return swing of 99 cm. a.)On which swing ...
Thursday, March 7, 2013 at 5:57pm

Physics-VASTS
The Mass Budget: Mars Reconnaissance Orbiter Repair Mission Operational Concept Math Problem: The Mars Reconnaissance Orbiter (MRO) has encountered a failure in its High Resolution Imaging Science Experiment (HiRISE) camera. Mission Case: As the HiRISE camera contains the ...
Thursday, March 7, 2013 at 4:29pm

math
The sum of the first 10 terms of an arithmetic series is 145 and the sum of its fourth and ninth term is five times the third the..determine the first term and constant difference
Thursday, March 7, 2013 at 2:43pm

Math 0098
A theater group made appearances in two cities. The hotel charge before tax in the second city was \$1000 lower than in the first. The tax in the first city was 5.5% , and the tax in the second city was 5%. The total hotel tax paid for the two cities was \$501.25 . How much was ...
Thursday, March 7, 2013 at 12:39pm

edu/diversity
With growing concern and intake of information , a child may not be able to put new details into former mental bins and concept groups. When this occurs, a search for_____is stimulated a. coherence b. rules c. consonance d. definition Would A be appropriate Which one of the ...
Thursday, March 7, 2013 at 11:37am

math
Cinema 2 has 25 seats in the first row and 30 rows in all. Each successive row contains one additional seat. How many seats are in the theater
Thursday, March 7, 2013 at 8:02am

1. The servers at Gerry Frasier's busy ice cream shop decided that putting more ice cream in the sundaes and cones would bring back more customers. After three months, Gerry was surprised to discover that his profit had A. increased, although sales had dropped. B. ...
Thursday, March 7, 2013 at 5:00am

literacy
To determine the best place to begin your online research, you should first A. formulate your research question B. choose severval verbs and modifiers to help define your search. C. identify keywords and search terms D. settle on a single, concise search term or phrase my ...
Thursday, March 7, 2013 at 12:53am

Pre-Calculus
Find the inverse of the following quadratic equation. Hint: Complete the square first. y= 2x²+16x-5
Thursday, March 7, 2013 at 12:50am

Pre-Calculus
Find the inverse of the following quadratic equation. Hint: Complete the square first. y= x²+14x+50
Thursday, March 7, 2013 at 12:25am

algebra
an investment of \$50,000 was made by a busines club. the investment was split into three parts and lasted for one year.the first part of the investment earned 8% interest, the second 6%, and the third 9%. total interest from the investments was \$3960. the interest from the ...
Wednesday, March 6, 2013 at 10:34pm

INTRODUCTION TO CATERING
3. What's the main advantage of establishing per-item prices on an order and pricing form? A. Clients are informed in advance that high-cost items should be excluded. B. You can reduce the cost of materials and labor. C. Clients have a way to tailor a catered event to ...
Wednesday, March 6, 2013 at 6:24pm

maths
If told that the 3rd term of a GP is 36 and the 8th term is 8748. find the first term and the common ration.
Wednesday, March 6, 2013 at 1:25pm

Calculus Optimization Problem
Find two positive numbers whose sum is 15 such that the product of the first and the square of the second is maximal. I came up with this so far: x + y = 15 xy^2 is the maximum derivative of xy^2= 2xyy' + y^2 Now how do I solve this ^ after I set it to zero? I am stuck on ...
Wednesday, March 6, 2013 at 1:10pm

arithmetic
Alan and Bob are playing with numbers. Starting with the number n=1 they take turns performing arithmetic manipulations with n. Alan goes first and always multiplies n by 3. Bob adds 1 or 2 to the number n, depending on a coin toss. A number is called reachable, if it can ...
Wednesday, March 6, 2013 at 11:16am

history
Among instances of corporate malfeasance in the early twenty-first century, the _______ scandal was the most shocking and economically damaging for employees and shareholders.
Wednesday, March 6, 2013 at 9:25am

English
pwsafmix copy the letter string above on a piece of paper. cross out the second and last letters. Replace all vowels with letter C. insert an O before the second C. cross out the first and third letters. double the second letter. help!
Tuesday, March 5, 2013 at 11:57pm

Chemistry
The decomposition of hydrogen peroxide is first order in H2O2: 2H2O2(aq) → 2H2O(l) + O2(g) Rate = k [H2O2] How long will it take for half of the H2O2 in a 10-gal sample to be consumed if the rate constant for this reaction is 5.6 x 10-2 s-1?
Tuesday, March 5, 2013 at 10:12pm

Samantha Vega gross weekly salary is 600 dollars her weekly federal withholding is 35 dollars . the Social Security tax is 6.2 percent of the first 90,000 . the Medicare tax is 1.45 percent of gross pay. this state tax is 1.5 percent of gross pay. each week she pays 12.40 for ...
Tuesday, March 5, 2013 at 9:25pm

Math
More than 18'students in an algebra class pass the first test. This is about three-fifths of the class. How many students are in the class? How do you know?
Tuesday, March 5, 2013 at 8:58pm

Chemistry
I've figured out most of it. I'm not sure how to find the percentage ofd the isotope. Define the half life. The half-life of a radioisotope is found to be 4.55 minutes. If the decay follows first order kinetics, what percentage of isotope will remain after 2.00 hours ...
Tuesday, March 5, 2013 at 8:57pm

Economics
Present value equivalent for geometrically increasing series when the first year base of 4,000 increasing at 4% per year to year 15 at an interest rate 17% compounded continuously? urgent Help please
Tuesday, March 5, 2013 at 8:42pm

The ________________ stage of Erikson’s model of psychosocial development is like a “hub” that early stages lead to and later stages depend on. identity vs. identity confusion intimacy vs. isolation generativity vs. stagnation autonomy vs. shame and doubt ...
Tuesday, March 5, 2013 at 8:01pm

Math statistisc
I have a 6 sided dice with numbers 1 to 6 written on faces. What number(s) would have to show up if you rolled the die five times in order to have the smallest possible standard deviation? What number(s) would have to show up if you rolled the die 5 times in order to have the ...
Tuesday, March 5, 2013 at 6:39pm

Math statistisc
I have a 6 sided dice with numbers 1 to 6 written on faces. What number(s) would have to show up if you rolled the die five times in order to have the smallest possible standard deviation? What number(s) would have to show up if you rolled the die 5 times in order to have the ...
Tuesday, March 5, 2013 at 6:38pm

Math statistisc
I have a 6 sided dice with numbers 1 to 6 written on faces. What number(s) would have to show up if you rolled the die five times in order to have the smallest possible standard deviation? What number(s) would have to show up if you rolled the die 5 times in order to have the ...
Tuesday, March 5, 2013 at 6:38pm

algebra
the primeter of a rectangle is 24ft. the length is 2 ft longer than the width. Find the dimensions. Write a system of linear equations and solve the resulting system. Let x be the length and y be the width, write the first equation. 2x+2y=__ write the second equation. x=y+__ ...
Tuesday, March 5, 2013 at 6:05pm

math
two mechanics worked on a car the first mechanic worked for 5 hours and the second mechanic worked for 15 hours together they charged a total of 1750 what was the rate charged per hour by each mechanic if the sum of the two rates was 160 per hour
Tuesday, March 5, 2013 at 2:26pm

Algebra 1 Part 2
What are the minimum,first quartile,median,third Quartile,and maximum of the data set?5 55,62,61,54,68,72,59,61,70.
Tuesday, March 5, 2013 at 11:06am

Accounts
You notice that your accounts receivable days outstanding has doubled in the first 6 months. Do you give someone a bonus or put him or her on probation? Why?
Tuesday, March 5, 2013 at 9:30am

math
if 2 socks are chosen at random,what is the probality of getting first a black sock and then a blue sock?
Monday, March 4, 2013 at 11:56pm

statistics
*Give all probabilities to four decimal places. Bowl #1 contains 4 grape candies, 5 lemon candies, 6 cherry candies and 5 raspberry candies. Bowl #2 contains 8 grape candies, 5 lemon candies, 4 cherry candies and 3 raspberry candies. (c) What is the probability that the two ...
Monday, March 4, 2013 at 8:34pm

statistics
Bowl #1 contains 4 grape candies, 5 lemon candies, 6 cherry candies and 5 raspberry candies. Bowl #2 contains 8 grape candies, 5 lemon candies, 4 cherry candies and 3 raspberry candies. (c) What is the probability that the two selected candies are the same flavour? (d) What ...
Monday, March 4, 2013 at 8:08pm

math
Lamar deposits 5000 into an account that pays interest at 4% per year. How much interest wilk he be paid in the first 3 years
Monday, March 4, 2013 at 6:58pm

math
Lamar deposits 5000 into an account that pays interest at 4% per year. How much interest wilk he be paid in the first 3 years
Monday, March 4, 2013 at 6:56pm

physics
In the figure, a frictionless roller coaster car of mass m = 672 kg tops the first hill with speed v0 = 19.4 m/s at height h = 34.7 m. How much work does the gravitational force do on the car from that point to (a) point A, (b) point B, and (c) point C? If the gravitational ...
Monday, March 4, 2013 at 6:47pm

Algebra
Alan and Bob are playing with numbers. Starting with the number n=1 they take turns performing arithmetic manipulations with n. Alan goes first and always multiplies n by 3. Bob adds 1 or 2 to the number n, depending on a coin toss. A number is called reachable, if it can ...
Monday, March 4, 2013 at 4:53pm

psychology
The first year after the speed limit was reduced to 55 mph was the first year since there was a federal speed limit that no one in the United States who was observing the speed limit died in an auto accident. What does this prove?
Monday, March 4, 2013 at 1:02pm

corporate finance
1. Which of the following is NOT correct for a firm with seasonal sales and customers who all pay promptly at the end of 30 days? a. DSO will vary from month to month. b. The quarterly uncollected balances schedule will be the same in each quarter. c. The level of accounts ...
Monday, March 4, 2013 at 11:40am

Math
Stupid question time. I need to figure out how to rearrange equations to solve for x in my chemistry homework, which involves putting equations in quadratic form first. But I can't for the life of me remember how to "rearrange" them correctly. So what in the step...
Monday, March 4, 2013 at 6:06am

Algebra
Alan and Bob are playing with numbers. Starting with the number n=1 they take turns performing arithmetic manipulations with n. Alan goes first and always multiplies n by 3. Bob adds 1 or 2 to the number n, depending on a coin toss. A number is called reachable, if it can ...
Monday, March 4, 2013 at 12:26am

mathematica
Christmas lights that stay on when one bulb burns out are wired as parallel circuits. Resistors can be used with parallel electrical circuits to restrict the current flow and produce heat. If the first resistor (R1) = 20 Ohms, the second resistor (R2) = 30 Ohms and the ...
Sunday, March 3, 2013 at 10:23pm

Math!!
Christmas lights that stay on when one bulb burns out are wired as parallel circuits. Resistors can be used with parallel electrical circuits to restrict the current flow and produce heat. If the first resistor (R1) = 20 Ohms, the second resistor (R2) = 30 Ohms and the ...
Sunday, March 3, 2013 at 9:54pm

Chemistry
50 mL of copper(II) sulfate reacts with 50 mL of sodium hydroxide. Their concentrations are 0.3 M and 0.6 M respectively. The temperature increased to 23.6 C from 23.4 C. Determine the enthalpy change for the reaction in kJ/mol of sodium hydroxide. Q=mcΔT =(50g + 50g)(4....
Sunday, March 3, 2013 at 7:56pm

Modifying 1)what does the word (originally) modify in the sentence Native American originally developed lacrosse? 2) what does the word (first)modify in this sentence it was first played by the iriquois 3) what does the word (differently) modify in this sentence It was play ...
Sunday, March 3, 2013 at 6:55pm

Math
A manufacturing firm is thinking of launching a new product. The firm expects to sell \$950,000 of the new product in the first year and \$1,500,000 each year thereafter. Direct costs including labor and materials will be 45% of sales. Indirect incremental costs are estimated at...
Sunday, March 3, 2013 at 1:40pm

maths
find the first 3 terms in the expansion of (x+4)(1+3x)^-2 as a series in ascending powers. I expanded the second bracket using binomial expansion and got 1 -6x +27x^2 -108x^3 how do I combine (x+4) with the expansion? Any help would be appreciated.
Sunday, March 3, 2013 at 9:16am

math
A box contains four red, three blue, and six green lenses. Two lenses are randomly selected from the box. Find the probability of getting two red lenses when two are selected if the first selection is NOT replaced before the second selection is made.
Sunday, March 3, 2013 at 8:24am

physics
A race car travels northward on a straight, level track at a constant speed travels 0.745 km in 22.0 s. The return trip over the same track is made in 27.0 s. (a) What is the average velocity of the car in m/s for the first leg of the run? m/s (b) What is the average velocity ...
Sunday, March 3, 2013 at 12:18am

statistics
The composition of the 108 congress was 51 republican 48 democrats and 1 independent.a committee on aid to higher education is to be form with 3 senators to be chosen random to head the committee. find the probability that the group of 3 consist of, all republicans , all ...
Saturday, March 2, 2013 at 5:53pm

Math
Muna and Rita had 360 seashells. Muna gave 4/7 of her seashells to Rita. In return, Rita gave 2/5 of her total number of seashells to Muna. They then had an equal number of seashells each. How many seashells did each of them have at first?
Friday, March 1, 2013 at 11:49pm

Physics
train car with mass m1 = 521 kg is moving to the right with a speed of v1 = 7.9 m/s and collides with a second train car. The two cars latch together during the collision and then move off to the right at vf = 5.1 m/s. 1)What is the initial momentum of the first train car? I ...
Friday, March 1, 2013 at 11:44pm

math
a gardener places lilies in a pond.He does on the first day of the month of september.it double in volume every day until the last day of the month,the pool is full.On what day of the month was the pool half full of lilies?
Friday, March 1, 2013 at 9:00pm

english
Click on the box to choose whether each sentence restates the key idea expressed in the key sentence. Key Idea: When hot weather arrives and the nation takes to the outdoors, mishaps multiply. Drowning is the fourth most frequent cause of accidental deathin the summer. restate...
Friday, March 1, 2013 at 5:14pm

Write a one paragraph essay on how developments in technology influenced the rise and decline of the Assyrian Empire. The Assyrians were the first to use iron in their weapon works. They used it in spears, swords, shields and armor. They had the most advanced weapons of their ...
Friday, March 1, 2013 at 3:55pm

Calculus AP
Let R be the region in the first quadrant bounded by the graph y=3-√x the horizontal line y=1, and the y-axis as shown in the figure to the right. Please show all work. 1. Find the area of R 2. Write but do not evaluate, an integral expression that gives the volume of ...
Friday, March 1, 2013 at 1:25pm

World history; Check:P
Write a one paragraph essay on how developments in technology influenced the rise and decline of the Assyrian Empire. The Assyrians were the first to use iron in their weapon works. They used it in spears, swords, shields and armor. They had the most advanced weapons of their...
Friday, March 1, 2013 at 12:31pm

Chemistry
If acetic acid is the only acid that vinegar contains [Ka = 1.8*10-5] , calculate the concentration of acetic acid in the vinegar. pH of vinegar is 3.20 _______________ First I got the antilog of the pH given, which turned out to be 6.309E-4. Then I did [(6.309E-4)^(2)]/(1.8E-...
Friday, March 1, 2013 at 11:55am

Statistics
As part of a fund raising campaign, the 12 members of the governing board of an organization pledge to raise \$100,000. In the first month of the campaign, the average amount raised by the 12 board members is \$5,200. How much more must they raise, on average, so that they can ...
Friday, March 1, 2013 at 7:23am

Devry
1. You are part of a team given the task of designing an application to determine a students letter grade for a short course. The application will process a quiz, a project, a midterm exam and a final exam to determine the total score. The result of dividing the total score by...
Friday, March 1, 2013 at 1:42am

Algebra
This is a 2-part problem and I solved the first part, but can't get the second. Brad has a circular garden with a radius of 3 feet. There are 54 flowers in his garden. He wants to plant different flowers in a 1-foot border all around his garden. What is the area, in square...
Thursday, February 28, 2013 at 9:43pm

Math
A salesman drives from Ajax to Barrington, a distance of 150 mi, at a steady speed. He then increases his speed by 10 mi/h to drive the 183 mi from Barrington to Collins. If the second leg of his trip took 3 min more time than the first leg, how fast was he driving between ...
Thursday, February 28, 2013 at 9:09pm

Eng 12
What's the poetic device for this poem? this is only the other half of the poem cause I've already found the first stanza's poetic devices. Other than rhyme schemes, personification and imagery, what else are there in these 2 stanzas? This is a nonsense poem. The ...
Thursday, February 28, 2013 at 9:05pm

math( pre-algeba)
there were 6 purple socks and 4 orange socks in a drawer. Zucky picked one sock without looking(or replacing the first). What is the probability that he picked 2 purple socks?
Thursday, February 28, 2013 at 8:48pm

Physics
An automobile is brought to a stop by applying friction brakes to the wheels. The brakes get hot; their thermal energy is increased. The decrease in kinetic of the car is equal to the increase in thermal energy of the brakes. According to the first law of thermodynamics, the ...
Thursday, February 28, 2013 at 7:57pm

history
When the First World War ended, Americans welcomed what they hoped would be a “return to normalcy.” The decades that followed, however, are ones which would rarely be described as normal, in comparison to what came before or after. During these decades, a struggle ...
Thursday, February 28, 2013 at 4:47pm

accounting
On each December 31, you plan to transfer \$2,000 from your checking account into a savings account.The savings account will earn 9 percent annual interest, which will be added to the savings account balance at each year-end. The first deposit will be made December 31, 2010 ...
Thursday, February 28, 2013 at 4:44pm

social studies
1. Which of the following helped to increase the populations of northeastern cities? (1 point) more diversity successful cotton crops growth of factories and trade building of the Erie Canal 2. A boundary was set between Canada and the United States as a result of (1 point) ...
Thursday, February 28, 2013 at 4:23pm

Physics
The ship in Figure P14.35 travels along a straight line parallel to the shore and a distance d = 500 m from it. The ship’s radio receives simultaneous signals of the same frequency from antennas A and B, separated by a distance L = 800 m. The signals interfere ...
Thursday, February 28, 2013 at 4:16pm

Social Studies
1) The four major kinds of natural vegetation in the United States and Canada are tundra, grassland, desert scrub, and a. permafrost. b. forest. c. swamp. d. all of the above 2) Why is mining important to the economy of the United States? a. It employs many workers. b. Gold is...
Thursday, February 28, 2013 at 3:37pm

Physics
The ship in Figure P14.35 travels along a straight line parallel to the shore and a distance d = 500 m from it. The ship’s radio receives simultaneous signals of the same frequency from antennas A and B, separated by a distance L = 800 m. The signals interfere ...
Thursday, February 28, 2013 at 1:46pm

Calculus
Greetings, So I've been working on this problem: H(x) = (x^4 - 2x +7)(x^-3 + 2x^-4) H'(x)= Kept on getting it wrong and I assumed it was an algebra mistake. After multiple tries I went to a few derivative calculators to check my work... What I saw was the calculators ...
Thursday, February 28, 2013 at 1:21pm

Calculus
1a. 15 ft ladder is placed against a vertical wall. the bottom of the ladder is sliding away from the wall at a rate of 2 ft/sec. How fast is the top of the ladder sliding down the wall when the bottom of the ladder is 9 ft from the wall? 1b. Using the data in the first part, ...
Thursday, February 28, 2013 at 11:59am

Philosophy
First, translate the following statement pair into the symbols of propositional logic (use the letters P and R) (a) We will have a picnic unless it happens to rain (b) We won’t have a picnic only if it happens to rain Second, use truth tables to classify the above ...
Thursday, February 28, 2013 at 9:33am

Science SMI181Q
What volume of hydrogen chloride gas is produced by the reaction of 40 cm3 of chlorine with hydrogen? (First write a balanced equation).
Thursday, February 28, 2013 at 8:21am

Grammar,English
I wwas told to write a 3 syllable word for each clue. The first letter is provided. 1.Rational or reasonable [Clue:L} 2.To stand for or symbolise {clue:R]
Thursday, February 28, 2013 at 2:02am

programming logic and design
The Daily Gazette accepts classified ads in several categories. For most ads, the newspaper charges 10 cents per word for the first 50 words, and 8 cents per word for every word after that. Design a flowchart for a program that accepts data about an ad: customer name, ad ...
Wednesday, February 27, 2013 at 11:13pm

Math
Invitations were sent one week before the big event. Replies started coming in the following Monday. On Tuesday 2 more replies had been received than on Monday. On Wednesday, 11 more than one half the number of replies received on Monday were received, If a total of 53 ...
Wednesday, February 27, 2013 at 7:59pm

Congruency means that two figures or items are exactly the same size and shape. Where in life would it be vitally important for two or more items to be congruent? My first thought would be wheels on a car... does anyone else have any better ideas? Thanks!!! :)
Wednesday, February 27, 2013 at 2:37pm

Math 130
Sum the first two odd numbers, then the first three, the first four, and so on. From these observations could you guess the sum of the first 100 odd numbers?
Wednesday, February 27, 2013 at 1:52pm

Maths-financial
Lucas invests R4million into an account earning interest of 6% per annum compounded monthly.He withdraws an allowance of R30000 per month.The first withdrawal is exactly one month after he has deposited the R4million.How many such withdrawals will Lucas be able to make?
Wednesday, February 27, 2013 at 1:29pm

Calculus
1. Find the area of the region bounded by the curves and lines y=e^x sin e^x, x=0, y=0, and the curve's first positive intersection with the x-axis. 2. The area under the curve of y=1/x from x=a to x=5 is approximately 0.916 where 1<=a<5. Using your calculator, find ...
Wednesday, February 27, 2013 at 11:17am

quantitative rsearch
A manufacterer of computers designed to aid social scientists in analyzing rsearch data claims that are operational for at least 80% of the time . during the course of the year one computer was operational for 270 days. test, at the 1% CONFIDENCE LEVEL, whether the ...
Wednesday, February 27, 2013 at 9:44am

College Algebra
Alfred has just developed a new super ball and you have been asked to test its rebound capabilities. From your experiment you have found if you drop the ball from a height of 250 centimeters the first bounce average is 180 cm. rebound ratio = ? Using this rebound ratio, ...
Wednesday, February 27, 2013 at 8:59am

physics
In the diffraction pattern due to a single slit of width d with incident ligth of wavelength lamda at and angle of diffraction thita the conditon for first minimum
Wednesday, February 27, 2013 at 12:30am

math
Gravel is being dumped from a conveyor belt at a rate of 40 cubic feet per minute. It forms a pile in the shape of a right circular cone whose base diameter and height are always the same. How fast is the height of the pile increasing when the pile is 22 feet high? Here are ...
Wednesday, February 27, 2013 at 12:18am

math
the second angle of a triangle is twice the first angle. The third angle is five more than four times the first angle.Find the measure of the second angle.
Tuesday, February 26, 2013 at 10:24pm

math
Julie has been offered two jobs. The first pays \$400 per week. The second job pays \$175 per week plus 15% commission on her sales. How much will she have to sell in order for the second job to pay as much as the first?
Tuesday, February 26, 2013 at 10:22pm

Physics
At a certain instant, a ball is thrown downward with a velocity of 8.0 m/s from a height of 40 m. At the same instant, another ball is thrown upward from ground level directly in line with the first ball with a velocity of 12 m/s. Find (a) the time when the balls collide and (...
Tuesday, February 26, 2013 at 10:13pm

English
Word box: alias amble burly distort dogged dumbfounded extinct fossil grit inevitable ingrained meteoric parody prevail rend replenish rummage skimp sleuth vandalism 1.There is an old saying that nothing is really ____ except death and taxes inevitable 6.If you truly want to ...
Tuesday, February 26, 2013 at 10:04pm

Physics
In the sport of skeleton a participant jumps onto a sled (known as a skeleton) and proceeds to slide down an icy track, belly down and head first. In the 2010 Winter Olympics, the track had sixteen turns and dropped 126 m in elevation from top to bottom. (a) In the absence of ...
Tuesday, February 26, 2013 at 7:35pm

chemistry
Calculate the theoretical yield (g) of precipitate formed when 10.0 mL of 0.50 M magnesium nitrate is added to 5.0 mL of 0.50 M potassium phosphate? [You must first write the balanced chemical equation.] Which reactant is present in excess?
Tuesday, February 26, 2013 at 7:04pm

English
Word box: alias amble burly distort dogged dumbfounded extinct fossil grit inevitable ingrained meteoric parody prevail rend replenish rummage skimp sleuth vandalism 2.We were nothing less than ____ when we saw the immense damage that the hurricane had some in so brief a time ...
Tuesday, February 26, 2013 at 6:12pm

math
what should you do if at first you dont succeed? its a riddle and the letters are y,t,o,r,h,p,s
Tuesday, February 26, 2013 at 6:04pm

Physics
In the sport of skeleton a participant jumps onto a sled (known as a skeleton) and proceeds to slide down an icy track, belly down and head first. In the 2010 Winter Olympics, the track had sixteen turns and dropped 126 m in elevation from top to bottom. (a) In the absence of ...
Tuesday, February 26, 2013 at 4:46pm

Please help. Thank You. 1. The stem-changers in the current section are similar to those in the previous section except these stem-change "o" to "oe." A.) true B.) false 2. Of the following, which is not a stem-changing verb? A.) almorzar B.) comer C.) ...
Tuesday, February 26, 2013 at 3:11pm

Spanish
Please help. Thank You. 1. The stem-changers in the current section are similar to those in the previous section except these stem-change "o" to "oe." A.) true B.) false 2. Of the following, which is not a stem-changing verb? A.) almorzar B.) comer C.) ...
Tuesday, February 26, 2013 at 2:53pm

Please help. Thank You. 1. The stem-changers in the current section are similar to those in the previous section except these stem-change "o" to "oe." A.) true B.) false 2. Of the following, which is not a stem-changing verb? A.) almorzar B.) comer C.) ...
Tuesday, February 26, 2013 at 2:14pm

math
Generate the first five terms in the sequence using the explicit formula. cn= 12n – 11 (1 point)
Tuesday, February 26, 2013 at 1:13pm

Algebra 2
a.) the number of terms b.) the first term c.) the last term d.) evaluate the sum 5 E (3+n) n=1 8 E 2n/3 n=1 I dont know what the symbol is for the equation but it looks like an "E"
Tuesday, February 26, 2013 at 12:58pm

Physics
I'm trying to rank the maximum temperatures of water at 20 degrees Celsius after adding in heated copper cylinders. The first case is 1 cylinder at 22.5 degrees Celsius. Second is two cylinders at 25 degrees Celsius. Third is 3 cylinders at 25 degrees Celsius. Lastly, 1 ...
Tuesday, February 26, 2013 at 12:01am

us history
What amendment addressses the power balance between the national government and states? a)First b)Second c)Fourth d)Sixth e)Tenth
Monday, February 25, 2013 at 11:24pm

C.E.A Response (Quick english please edit)
Will you please read over this claim. evidence. analysis response and tell me if there are any errors or things that should be changed? thanks! C. E. A. Response Q: Why did the Nazis give off a nice persona when they first engaged with the Jews? The Nazis gave off a nice ...
Monday, February 25, 2013 at 9:30pm

math
Ted made a scale model of a submarine for his science class. a. What is the volume of Ted’s model? b. If 1 inch in the model represents 20 feet in the actual submarine, what is the volume of the actual submarine? front round is 3 inch radius/length 3 inch cylinder is ...
Monday, February 25, 2013 at 8:45pm

Economics
We're looking at the market for cat food. When the price is \$10, the quantity sold is 1000 bags. When the price drops 10%, the quantity sold increases 30%. Calculate the price elasticity of demand. (Answer in format X.XX, round to the nearest hundredth.) I know the formula...
Monday, February 25, 2013 at 7:13pm

Chemistry
A 205 mg sample of a diprotic acid is dissolved in enough water to make 250.0 ml of solution. The pH of this solution is 2.15. A saturated solution of calcium hydroxide (Ksp= 1.3 x 10-6) is prepared by adding excess calcium hydroxide to water and then removing the undissolved ...
Monday, February 25, 2013 at 6:27pm

Math
The first question is this: Helen designs a rectangle with an area of 225 square units. Her rectangle is the largest rectangle (that is, with largest area) with whole-number side lengths that can be made from the perimeter of the rectangle. A. Whay are the length and width of ...
Monday, February 25, 2013 at 6:15pm

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