Thursday
March 5, 2015

Posts by tina


Total # Posts: 1,044

Thermodynamics
Suppose you start with a liquid mixture of 60% nitrogen and 40% oxygen. Describe what happens as the temperature of this mixture increases. Be sure to give the temperatures and compositions at which boiling begins and ends.
April 10, 2013

math
a storage crate has the dimensions : 12ft * 6ft *5ft. how many cube-shaped boxes measuring 8 inches in length could be stacked completely within the cube??
April 10, 2013

Math
sec(alpha) = -4(√(5))/5 find exact values at alpha for the remaining five trig functions
April 10, 2013

Thermodynamics
Suppose you start with a liquid mixture of 60% nitrogen and 40% oxygen. Describe what happens as the temperature of this mixture increases. Be sure to give the temperatures and compositions at which boiling begins and ends.
April 10, 2013

math
julia picked 2 cards from a face down stack of cards containing 4 hearts 4 diamonds 4 clubs and 4 spades. Make a treediagram to find all the possible combinations for the 2 cards Julia picked
April 9, 2013

english
I'm writing a thesis for pathogens for infectious diseases. My essay is going to be about depressive disorder and anxiety disorder and I need to write a thesis for it.
April 7, 2013

Chemistry
What do we mean when we say that concentrated nitric acid (HNO3) is 16 molar?
March 24, 2013

Physics
For a certain Chemical reaction, you find that delta H = -100kJ and delta S = -200 J/K. What is the Gibbs free energy for the reaction at: (a) room temperature (b) 800 C (c) comment on whether the reactions are spontaneous or not
March 18, 2013

Math
If 10 jugs of H2o fill 5/8 of a bucket. Another 4 jugs and 5 cups of H2o are needed to fill the remaining parts of buckets. How many cups of H2o can fill a bucket?
March 6, 2013

math
Jay is twice as old as Sandy and 2 years younger than Mike. Mike is 7 years older than Sandy. How old is Jay?
March 6, 2013

Sampling Distribution
Sampling Distribution Complete solutions and illustrations are required. 5.The standard deviation of a variable is 15. If a sample of 100 individuals are selected compute for a.The standard error of the mean. b.What sample size is necessary to double the standard error of the ...
February 27, 2013

Sampling Distribution
Sampling Distribution Complete solutions and illustrations are required. 4.The average breaking strength of a certain steel cable is 2000 pounds, with a standard deviation of 100 pounds. A sample of 20 cables is selected and tested. Find the sample mean that will cut off the ...
February 27, 2013

chemistry
determine h30+ in M, of 10.00ml of .100M NaOH after adding 10.00ml of indicator solution?
February 27, 2013

Trig
Four wires support a 40-meter radio tower. Two wires are attached to the top and two are attached to the center of the tower. The wires are anchored to the ground 30-meters from the base of the tower. What is the total length of wire needed?
February 26, 2013

trig
Four wires support a 40-meter radio tower. Two wires are attached to the top and two wires are attached to the center of the tower. The wires are anchored to the ground 30-meters from the base of the tower.
February 26, 2013

Math
when i do this i get 3a^2sqrtb is that correct?
February 22, 2013

Math
how would i write out this equation into a simplified experssion using exponents. (81a^8b^4)^1/4
February 22, 2013

math
the answer is 2,220
February 19, 2013

Westwood college
Sixth Fourth Bank has an issue of preferred stock with a $5.50 stated dividend that just sold for $97 per share. What is the bank’s cost of preferred stock?
February 16, 2013

programming
3. Your company needs to depreciate its assets. The accountant wants to record the purchase price, the useful life, and the estimated salvage value. Your program should be able to depreciate by the straight-line method. For example, a computer system was purchased for $25,000...
February 15, 2013

programming
Write the following algorithms using pseudocode: 1. Calculate the net pay for an hourly employee. You will be given the name, pay rate and hours worked. You must calculate the state withholding (5%), federal withholding (18%), and Social Security (8%). You should display the ...
February 15, 2013

math-probability
A state lottery has a daily drawing to form a four-digit number. The digits 1 through 9 are randomly selected for each of the four digits. For each selection any one of the digits 1 through 9 are possible. What is the probability to the nearest hundredth of the four-digit ...
February 13, 2013

math
A game consists of tossing a coin and rolling an ordinary die. If the player tosses a head and rolls an even number, the player wins $3. Otherwise, the player loses $1. What is the expected value of this game? Select one: a. $6 b. $0 c. $3 d. $1
February 12, 2013

math
Flag question Question text A fair coin is tossed 6 times. What is the probability to the nearest hundredth of obtaining at least one head? Select one: a. .08 b. .98 c. .50 d. .02
February 11, 2013

math
A certain sweepstakes ticket has four categories of prizes with the following probabilities of being won: Prize Probability $100,000 1/500,000 $50,000 1/250,000 $20,000 1/200,000 $10,000 1/100,000 If each ticket costs $1.00, what is the expected gain or loss? Select one: a. $....
February 11, 2013

math
A certain sweepstakes ticket has four categories of prizes with the following probabilities of being won: Prize Probability $100,000 1/500,000 $50,000 1/250,000 $20,000 1/200,000 $10,000 1/100,000 What is the expected value of buying these sweepstakes tickets? Select one: a...
February 11, 2013

math
A disc-shaped spinner has five sections with the following colors and central angles: Blue, 60; Red, 120; Green, 45; Red, 45; and Yellow, 90. Determine the probability for one spin of the spinner. P(B U G)
February 10, 2013

math
A box contains 1 blue, 2 green, 1 red, and 2 yellow marbles. An experiment consists of randomly selecting two marbles without replacement. What is the probability of not obtaining a yellow marble?
February 10, 2013

trig
Two people decide to estimate the height of a flagpole. One person positions himself due north of the pole and the other person stands due east of the pole. If the two people are the same distance from the pole and a = 30 feet from each other, find the height of the pole if ...
February 10, 2013

chemistry
Calculate the theoretical percentage of water in gypsum, rounded to the nearest whole number %. (calcium sulfate dihydrate; CaSO4 ° 2H2O; Ca = 40 g/mol, S= 32 g/mol; O= 16 g/mol; H= 1 g/mol).
February 6, 2013

Math
A trapezoid is in the shape of a stage. write a coordinate proof to prove that TR and SF are para
February 5, 2013

math
there is 1/4 of a pear in every container of fruit salad. how many whole pears are there in 8 containers.
February 5, 2013

math
eight members of a club will make a paper chain. the chain is 4 feet long. each member will make an equal part. how much of the chain , in feet, will each member make?
February 5, 2013

math
Two people want to share 4/3 feet of rope equally. What length of rope should each person get?
February 4, 2013

Computer
I have the answer I was looking for, but do not know exactly how to format it into Excel. Can you please show that format ASAP? This is due tomorrow. Thank you!!! Bank Stmt Balance $4270.00 Add Rejected Checks 140.00 Deposited Checks 1650.00 Ending Balance $6060.00 Book ...
February 4, 2013

trig
cos(+pi/2-theta)/csctheta+cos^2theta
January 31, 2013

English
I need help to choose a proposal argumentative topic using would or should. May you help me?
January 18, 2013

English 11 B
Langston Hughes Questions: 1. Why does Edward hand over his belongings? (1 point) A. He is afraid. B. He feels sorry for the men. C. He is in a hurry and thinks he will be able to get to his destination more quickly if he does as he is told. D. none of the above 2. Why don&#...
January 15, 2013

Math
there was very little rain in Austin one summer. In june, the depth of lake travis fell 3 inches from its usual level. In july, it went down another 5 inches. in August it finally rained adding 2 inches to the lake depth. How many inches below the usual level was the lake at ...
January 9, 2013

Math please help! Im so confused!
Thank you DrBob222 and Ms. Sue!!!!
January 9, 2013

Math please help! Im so confused!
it is estimated that at the turn of the 20th century, one farmer in the U.S could feed 25 people, whereas today, the ratio is about 1 to 130. How many farmers would it take today to feed 2600 people? Please help i dont even know how to do this problem!
January 9, 2013

physical science
Using Fig. 4.28 as an example, how much applied force would the man need to have to pull the block (weight or output force = 500 N) if the rope he is holding is 7 m long and the rope on the pulley is 2 m long? (Hint, the pulley is a simple machine)
January 3, 2013

physical science
8. Which one has more momentum? Which has the greater impulse? a. A 2000 kg car moving at 5 m/s b. A 9 g bullet traveling at 450 m/s
January 2, 2013

physical science
4. Jane weighs 150 lbs and Bob weighs 220 lbs. They decide to try skydiving. If they jump at the same time, who would reach the ground first
January 2, 2013

physics
Jane weighs 150 lbs and Bob weighs 220 lbs. They decide to try skydiving. If they jump at the same time, who would reach the ground first
January 2, 2013

Math
Find the standard divisor for the given population and number of representative seats. Assume the population is equal to 190,000 and the number of seats is 8. d = ______
December 23, 2012

algebra
convert 44.6 % to fraction notation
December 10, 2012

HSM/220 - HUMAN SERVICES ADMIN: SO YOU WANT TO HEL
To have effective organizational structure advantages in departmentalization would consist of good communication in each unit information would have to be well documented by intake to fit the client’s conditions and needs. Intake must make sure the information is passed ...
December 4, 2012

Probability
4 fair coins are tossed. What is the probability that all the outcomes are heads?
November 28, 2012

Steve help!
10,000 students took a math test. If there average score was 40 with standard deviation of 10, how many students must have scored between 20 and 40 marks? 3,772 2,227 5,000 3,334 4,772
November 28, 2012

penn foster
exam003062rr the staff
November 18, 2012

the facility
aesthetic is concerned with matter such as
November 11, 2012

the faclity
which of folling is a technique for limiting number childrenina intrest area
November 10, 2012

biology
provide information the muscles found within the forearm and hand
November 8, 2012

Culturally Diverse Background
A head start classroom has english and spanish word pairs attached to the door windoe play center and storage shelving to supply children with two labels for each physical objects or area. This is done to support
November 4, 2012

Culturally Diverse Background
the process of leaening code switching is meant to
November 4, 2012

Culturally Diverse Background
Describing an action is not practiced in her home or by friends
November 4, 2012

algebra
Example 2: The difference of two numbers is 16. The first number is 4 less than twice the second number. Set up this system that describes the situation.
November 3, 2012

Statistics
A university has an exclusive agreement with the coffee chain Monobeans. Several students and faculty complained about their lack of baked goods. Looking for a better provider of carbs and caffiene, the university management rents out for one trial semester a space within a ...
October 29, 2012

chemistry 100
recovering a significantly larger amount of SiO than was present in the original sample
October 28, 2012

chemistry 100
how you could separate the components of a mixture of PbCL and NaSO and recover the two substances
October 28, 2012

algebra
a barrel contains 163 gallons of water and is being drained at a constant rate of gallons per hour write an equation that models the number of gallons g after t hours
October 22, 2012

math
What does same old means, can u please explain and let me know? Thanks
October 21, 2012

math
In lowest terms, my numerator is 4 less than my denominator. Write 5 fractions 1 could be.
October 21, 2012

math
Thank You:)
October 21, 2012

math
Can you please help me? I need to understand this problem. Thanks a lot
October 21, 2012

math
My numerator is 10 less than my denominator. I am equal to 3/5
October 21, 2012

math
Thank You!
October 21, 2012

math
How did we get 135 here? please explain? thanks
October 21, 2012

math
My denominator is 5 more than my numerator.I am equal to 27/72
October 21, 2012

math
if a square lot has an area of 256cm what the length of each side be?
October 14, 2012

Algebra
A 5 ft man cast a shadow of 3 ft standing next to a 22ft building. How far is the man standing from the building?
October 8, 2012

math
what is the sample standard deviation of 12 12 14 16 17 18 21 21
October 4, 2012

physics
A force of 3.4 n is exerted on a 7.8 g rifle bullet.what is the bullet acceleration in m/s^2?
September 30, 2012

math
if you live 71 mi from a river, does it make sense to say you live about 80 mi from river? explain
September 29, 2012

ODU
FIND THE EXACT VALUE OF COS U 4/5, PI/2 <U< SIN 2U=? COS 2 U= TAN 2 U=
September 28, 2012

chemistry
Water has a density of 0.089 g/ml. What is the volume, in gallons, of 11.1 tons of water?
September 25, 2012

algebra
find the area of a triangle with the base of 3 2/3 yards and height of 3/7 yrads
September 23, 2012

reading
All of the following statements about reading skills are true EXCEPT
September 23, 2012

math
how can you use place value to find the number of apples picked in all
September 17, 2012

Health
its not d
August 30, 2012

Chemistry
Isopropyl alcohol evaporated from a beaker at the rate of 1.057 mL/min. how many seconds would it take for 3.70 mL of water to be lost? thanks for helping!
August 28, 2012

maths
prove that tan(45+theta)+tan(45-theta)=2sec2theta
August 10, 2012

6th grade math
Cameron is making bead necklaces. Hehas 90 green beads Nd 108 blue beads. what is the greatest number of identical necklace es he can make if he wants to use all the beads
August 8, 2012

Science
Find the [H+] in a 0.0255 M solution of HF if the Ka = 7.2 X 10^ -4
July 29, 2012

child day care
the facility
July 27, 2012

chem
three students each measured the boiling point of water at each destination person 1 had boing point of 93.9 c 2nd person found boiling point of 101.1 c 3rd person found boing point of 100.0 c. which student went water skiing in honolulu? which student went to ely, nevada? ...
July 16, 2012

chemistry
95.0 g of0.0 degrees celsius ice is added to exactly 100 g of water at 60.0 degrees celsius. when the temperature of the mixture first reaches 0.0 celsius the mass of the ice present is?
July 15, 2012

MATH
You’re building a rectangular frame 10 inches by 11 inches. How many feet of wood do you need?
July 9, 2012

INFORMl logic
One of the disadvantage of using truth table is: it is difficult to keep the line straight, T;s are easy to confuse with F's . they grow exponttenally and become too large for complex arguments, they cannot distunigunish strong inductive arguments from weak inductive ...
July 8, 2012

Math
5x-y=1 10x-2y=2
June 19, 2012

Accounting
Kathryn, an individual, own all of the outstanding stock in Copper Corporation. Kathryn purchased her stock in Copper 11 years ago, and her basis is $18,000. At the beginning of this year, the corporation has $38,000 of accumulated E &P and no current E&P (before considering ...
June 9, 2012

need help
A.a circle graph
June 5, 2012

finance
AAA has only stock and bonds in its capital structure. Balance sheet information: Long term debt (par value--NOT number of bonds) = $20,000,000, Common equity and retained earings = $17,000,000, and Shares of stock outstanding = 1,000,000. Bond information: Bond price ($1,000 ...
June 1, 2012

Physics
After delivering his toys in the usual manner, Santa decides to have some fun and slide down an icy roof. The roof is 7 m in length and makes an angle of 41° with the horizontal. He starts from rest at the top of the roof and accelerates at the rate of 3.9 m/s2. The edge ...
May 25, 2012

English
answer 1 B) The patient was brought to the operating room, induced in general endotracheal anesthesia, and then prepped and draped in the usual sterile fashion. answer2 b) whom answer3 a) hers
May 23, 2012

Math
Determine the slope of the line that passes through the points E(-1, 9) and F(2, -3)
May 23, 2012

5th Grade Math Algebraic Expressions
23
May 15, 2012

poli sci
the president has the power to appoint which of the following positions? a) members of the House of Representatives who resign before their term has expired b) all members of the State Department c) al state Supreme Court justices d) cabinet secretaries e) the Speaker of the ...
May 10, 2012

Math
You are 40 years old and have a salary of $50,000 per year. When you retire at age 66, you want to have a salary that has the same buying power as the one you currently have. If you estimate that the inflation rate will be 1.25% per year, what will your final salary need to be?
May 7, 2012

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