Sunday
December 21, 2014

Posts by Annie


Total # Posts: 661

math
For a fundrasier, the Best Buddies club sold t-shirts. The adult shirts were $15 per shirt and the youth shirts were $12 per shirt, and they made a total of $330 on the shirts. If they sold a total of 26 shirts, how many of each did they sell? I don't understand this, so ...
February 27, 2013

Physics
A 0.03-kg bullet is fired vertically at 200m/s into a 0.15-kg baseball that is initially at rest. The bullet lodges in the baseball and, after the collision, the baseball/bullet rise to a height of 37m. (a). What was the speed of the baseball/bullet right after the collision...
February 14, 2013

Math
At a concession stand, popcorn costs $1.10 and nachos cost $2.35. One day, the receipts for a total of 172 popcorn and nachos were $294.20. How many popcorns were sold. Please show work! I don't understand
February 6, 2013

Chemistry
calculate the enthalpy change for: (enthalpy of formation of aqueous sodium hydroxide is -469.60 kJ/mol. enthalpy of formation of liquid water is -285.8 kJ/mol) 2Na + 2H2O = 2 NaOH + H2
January 31, 2013

chemistry
a weather balloon partially filled w/ 33.5 L of helium @ 18 deg C & .95 atm. what volume will helium occupy @ -23 deg C w/ a pressure of 3 x 10 to the -3 atm?
January 29, 2013

chemistry
calculate the # of moles of oxygen in 2 L @ 24 deg C & 750 torr
January 29, 2013

Chemistry
# of moles of oxygen in 2 L @ 24 deg C & 750 torr?
January 28, 2013

chem hwk help!
Given the following reaction: 3 CaCl2 + 2 H3PO4 Ca3(PO4)2 + 6 HCl How many grams of H3PO4 are needed to react completely with 1.837 g of CaCl2? I don't understand at all
January 25, 2013

chemchemchem
thad do you know how to do #13?
January 25, 2013

chemchemchem
yes! thank you it worked!
January 25, 2013

ALGEBRA 1 PLEASE HELP! I DONT UNDERSTAND
In basketball you score 2 points for a field goal and 1 point for a free throw. Suppose that you have scored at least 3 points in every game this season, and have a season high score of 15 points in one game. How many field goals and free throws could you have made in any one ...
January 20, 2013

math (algerba 1) Please help!
In basketball you score 2 points for a field goal and 1 point for a free throw. Suppose that you have scored at least 3 points in every game this season, and have a season high score of 15 points in one game. How many field goals and free throws could you have made in any one ...
January 18, 2013

science/evolution
what exactly is the unity of life?
January 18, 2013

science
what is the unity of life? if asked to explain two examples could it be a human and a chimp or would the two examples be DNA and RNA?
January 16, 2013

biology
what is the importance of islands in the study of evolution?
January 14, 2013

Stat
Please help with this problem, not sure calculate it. Consider the standard normal distribution and find P(-1.5 < Z < 2.35).
December 14, 2012

Physics
A kickoff sends a football with an initial velocity of 25 m/s at an angle of 50 degrees above the horizontal. a) find the x and y components of the velocity b) find the time the ball is in the air c) find the horizontal distance the ball travels before hitting the ground d) ...
November 29, 2012

Physics
a 254-kg crate is pushed horizontally with a force of 740 N. if the coefficient of friction is .20, calculate the acceleration of the crate
November 29, 2012

Geometry
it is not a right triangle. the easiest way i determine is if they are factors of 3,4 and 5
November 29, 2012

chemistry
The air exhaled by an average human being might have the following typical combustion, expressed in terms of partial pressures: N2 = 569torr; O2 = 116 torr; CO2 =28 torr; water vapor = 47 torr. what are the mole fractions of each?
November 25, 2012

Physics
A 50-kg satellite circles the Earth in an orbit with a period of 120 min. What minimum energy is required to change the orbit to another circular orbit with a period of 180 min? (Earth: radius = 6.4  106 m, mass = 6.0  1024 kg)
November 18, 2012

algebra
Does 6+5x=44
November 16, 2012

Chemistry
I have one more question, why is the volume of NaCl 0.05 L when we are calculating the mols and 0.1 L when we are calculating mass?
November 12, 2012

Chemistry
Thankyou so much for all the help and the explanation and your time.
November 12, 2012

Chemistry
Originally the enthalpy is negative then how does it become postive and I have followed the steps and I came up 47.36 J/g degrees C. Also I don't understand why enthalpy is q if you could please explain that, and thankyou so much.
November 12, 2012

Chemistry
yes dt is delta T and i think it is the specific heat capacity of NaCl but im not sure
November 12, 2012

Chemistry
Naoh (aq) + HCl (aq) --> NaCl (aq) + H2O (l) Using the dT determined in part 1, calculate the heat capacity of the calorimeter. Enthalpy of reaction= -58.3 kj/mol, Cs (NaCl = 3.91j/g C)density of 1 M NaCl = 1.037g/mL. dT= 12.88 degrees Celcius.50 mL of 2.00 M HCl and 50 ml ...
November 12, 2012

Chemistry
50 mL of 2.00 M HCl and 50 ml of 2.05 M NaOH were used
November 12, 2012

Chemistry
Naoh (aq) + HCl (aq) --> NaCl (aq) + H2O (l) Using the dT determined in part 1, calculate the heat capacity of the calorimeter. Enthalpy of reaction= -58.3 kj/mol, Cs (NaCl = 3.91j/g C)density of 1 M NaCl = 1.037g/mL. dT= 12.88 degrees Celcius.
November 12, 2012

Physics
Consider a stainless steel annular disk with an outer radius 68mm and inner radius7.4mm. The mass of the disk is 1349 grams. The stainless steel annular disk is allowed to rotate on a frictionless table with the rotation axis at its center. The disk has a small cylinder ...
October 30, 2012

Physics
Consider a stainless steel annular disk with an outer radius 68mm and inner radius7.4mm. The mass of the disk is 1349 grams. The stainless steel annular disk is allowed to rotate on a frictionless table with the rotation axis at its center. The disk has a small cylinder ...
October 30, 2012

Chemistry
A sample of the compound prepared in this experiment, weighing .1021g, is dissolved in HNO3 and diluted to a volume of 100mL. A 10mL aliquot of that solution is mixed with 10mL 6 M NH3. The [Cu(NH3)4 2+] in the resulting solution is 5.16x10^-3 M. How many moles of Cu were in ...
October 23, 2012

Physics
The drawing shows a jet engine suspended beneath the wing of an airplane. The weight W of the engine is 12000 N and acts as shown in the drawing. In flight the engine produces a thrust T of 54200 N that is parallel to the ground. The rotational axis in the drawing is ...
October 21, 2012

Math
How many integers bewteen 200 and 500 inclusive leave a remainder 1 when divided by 7 and a remainder 3 when divided by 4? Find the smallest positive integer that leaves a remainder 5 when divided by 7, a remainder 6 when divided by 11, and a remainder 4 when divided by 13.
October 13, 2012

Math
Which Statements of congruence are true and which are false and why? 177 _= 17 871 _= 713 1322 _= 5294 5141 _= 8353 13944 _= 8919 67 x 73 _= 1 x 3 17 x 18 x 19 x 20 _= 4! 83 (144 power) _= 15 (144 power) Their not equals signs...they are three lines on top of one another.
October 13, 2012

Stoichiometry
A gas mixture at 27 C and 750 torr contains acetone vapor with 70% saturation. Calculate the temperature to which the gas must be cooled, at constant pressure to condense 40% of the acetone.
October 10, 2012

Math
Sue drives 36 miles to the fair. Every 4 miles, she sees a sign to the fair. . How many signs will she see on her trip in all?
September 27, 2012

Chemistry
calculate the volume of a rectangular prism with a length of 5.6 , a width of 2.1 , and a height of 6.6 .
September 27, 2012

Chemistry
Suppose you are asked to find the area of a rectangle that is 2.1- wide by 5.6- long. Your calculator answer would be 11.76 . Now suppose you are asked to enter the answer to two significant figures. (Note that if you do not round your answer to two significant figures, your ...
September 27, 2012

Physics
In a World Cup soccer match, Juan is running due north toward the goal with a speed of 7.70 relative to the ground. A teammate passes the ball to him. The ball has a speed of 13.3 and is moving in a direction of 30.5 east of north, relative to the ground. a) what is the ...
September 25, 2012

math
Every year there is a race to the top of the empire state building. In 1993 the winner got to the top in 10 minutes, 18 seconds. how many stairs did the winner go up per second, rounded to the nearest whole number
September 20, 2012

Math
What is the doubling time of prices which are increasing by 5 percent per year?
September 19, 2012

Precalculus
What is the doubling time of prices which are increasing by 5 percent per year?
September 19, 2012

Math
The half-life of radioactive strontium-90 is approximately 32 years. In 1961, radioactive strontium-90 was released into the atmosphere during testing of nuclear weapons, and was absorbed into people's bones. How many years does it take until only 8 percent of the original...
September 19, 2012

Physics
12
September 14, 2012

math
Show that f and g are inverse functions algebraically. f(x)=x^3/2 g(x)=3 cuberoot 2x My work so far: (3sqrt2x)^3 ------------ 2 I need help on the numeral part of the expression
September 11, 2012

pre-calc
Show that f and g are inverse functions algebraically. f(x)=x^3/2 g(x)=3 cuberoot 2x My work so far: (3sqrt2x)^3 ------------ 2 I need help on the numeral part of the expression
September 11, 2012

economics
Suppose that when a firm increases output by 20%, long-run total cost increases by 50%. The firm will experience
August 19, 2012

health
Whats the answer?
August 11, 2012

Math
What scenic structures are featured in chapter 2 Problem Solving on Location?
August 1, 2012

health
hey .... if its wrong why dont you put the answer !!!
August 1, 2012

math
x> 2
July 19, 2012

Organic Chemistry
a) What would be the product formed if diphenylacetylene were reacted with aqueous sulfuric acid? b) What would be the product formed if diphenylacetylene were reacted with two equivalents of HBR?
July 14, 2012

government
The first American voters were only white, male ---------s
July 5, 2012

statistics
A particular report included the following table classifying 711 fatal bicycle accidents according to time of day the accident occurred. Time of Day Number of Accidents Midnight to 3 a.m. 38 3 a.m. to 6 a.m. 29 6 a.m. to 9 a.m. 64 9 a.m. to Noon 78 Noon to 3 p.m. 98 3 p.m. to ...
June 28, 2012

calculus
Please help! ∫17dx/x^2(sqrt(x^2+49)) .. let x=7tan(θ). thank you so much for your help!
June 6, 2012

math
the gerund phrase is: studying calculus for the noun function I put: predicate noun, correct?
May 22, 2012

essay
what are some some similarities and differences between dawn and night by elie wiesel?
May 17, 2012

Reading comprehension
False
May 9, 2012

Reading comprehension
Reading - Annie, Tuesday, May 8, 2012 at 9:56pm The fish sizes r on a graph Blue fish. 70 feet Red fish. 45 feet Question true or false The blue fish is not as long as the red fish. True or false
May 9, 2012

Reading comprehension
False
May 8, 2012

Reading comprehension
Reading - Annie, Tuesday, May 8, 2012 at 9:56pm The fish sizes r on a graph Blue fish. 70 feet Red fish. 45 feet Question true or false The blue fish is not as long as the red fish. True or false
May 8, 2012

Reading comprehension
@Ms Sue I copied the statement wrong it is The blue fish is not as long as the red fish
May 8, 2012

Reading comprehension
Ms Sue did u see my answer
May 8, 2012

Reading comprehension
I think the answer is false because not as long means that the red fish is longer
May 8, 2012

Reading comprehension
Reading - Annie, Tuesday, May 8, 2012 at 9:56pm The fish sizes r on a graph Blue fish. 70 feet Red fish. 45 feet Question true or false The red fish is not as long as the blue fish. True or false
May 8, 2012

Reading
The fish sizes r on a graph Blue fish. 70 feet Red fish. 45 feet Question true or false The red fish is not as long as the blue fish. True or false
May 8, 2012

Reading
I need to know if the statement is true or false
May 8, 2012

Reading
If a blue fish is 70 ft long and a red fish is 45 feet long. This is statement true or false. A blue fish is not as long as a red fish
May 8, 2012

Math
What is 0.5 to the tenth power, as a fraction? a.k.a. 0.0009765625 as a fraction
May 2, 2012

english
In the book Roll of Thunder, Hear my Cry, what is the double meaning of Mr. Granger's words when he says he ain't gonna stand for no hanging on his place, and if y'all touch one hair on that boy's head, he's gonna hold every man responsible"?
April 26, 2012

chemistry
what is the volume at STP of a sample of CO2 that has a volume of 75.0 ML at 30c and 680 mm Hg
April 26, 2012

chem
a volume of 20. l of O2 os warmed from -30c to 85c what is the new volume if the pressure is kept constant
April 24, 2012

geometry
If m = 6.25 cm and n = 10 cm, what is the measure of angle ?
April 16, 2012

Math
Error Analysis: A friend says that the retail price of an item with a wholesale price of $80 is $100 after a markup of 125%. Describ and correct the error in the person's statement.
April 12, 2012

English
I read A partial rememberance of a puerto rican childhood. I'm suppose to be writing a essay but I need a thesis to do an outline.
March 25, 2012

English
Women is going crazy that a man doesn't care for her so it is driving her crazy. Men do harsh things like abusing their wife.
March 25, 2012

English
I am writing a paper and I was wondering does this sound like a good thesis? Cofer shows not only the crazyness women but also shows how men can be harsh.
March 25, 2012

Chemistry PLEASE HELP!!
energy from glucose is obtained from this equation when it is oxidized in the body C6H12O6 + 6O2 --> 6CO2 + 6H2O What is the catalyst in this equation?
March 22, 2012

English
isn't the question actually something like "You're walking home alone when you....." ??
March 22, 2012

physics
A 6.5 g bullet leaves the muzzle of a rifle with a speed of 347 m/s. What total constant force is exerted on the bullet while it is traveling down the 0.83 m long barrel of the rifle?
March 19, 2012

physics
The sum of two forces, one having a magni- tude of 2 N acting due west and other having a magnitude of 8 N acting due north is?
March 19, 2012

physics
A blimp is traveling due North at 80km/hr with respect to the air, while the wind is blowing from northeast at 25km/hr with respect to the ground. What is the velocity of the blimp with respect to the ground? Thanks.
March 14, 2012

Chemistry
1) Prepare 100mL of 10%w/w HCl from 37%concentrated HCl(density of 37%HCl =1.19g/ml) 2) Prepare 100mL of 10%w/v HCl from 37% concentrated HCl(density of 37%HCl=1.19g/ml) Can you please show the calculation steps for 1) & 2)? Is 10%w/v HCl the same as 10%w/w HCl? Thanks.
March 12, 2012

English - thank you ms sue i will wait
i will wait and thanks a lot
March 11, 2012

English - please help i had posted 3 times and no
please can you make correction in my short story. i am very bad at grammar and even my parents does not khnow english well. can you proof reed my short story. Love-Hate story “Happy birthday Khushi”, her family said as they came to her room at midnight. “Thank ...
March 11, 2012

eng lit
please proof read my short story please and make some correction Love-Hate story “Happy birthday Khushi”, her family said as they came to her room at midnight. “Thank you, Mom, Dad and my lovely sister”, Khushi said with a huge smile. Khushi laid down on ...
March 9, 2012

Chemistry
Oh, sorry. 25 g of Zinc and 30 g of sulfur. I already found that Zinc is the limiting reagent, but I'm stuck on the rest.
March 8, 2012

Chemistry
Zinc and sulfur react to form zinc sulfide according to the equation Zn+S=>ZnS a) How many grams of ZnS will be formed? b) How many grams of the excess reactant will remain after the reaction is over?
March 8, 2012

Physics help.
If a curve with a radius of 94.5 m is perfectly banked for a car traveling 72.4 km/h, what must be the coefficient of static friction for a car not to skid when traveling at 96.4 km/h?
March 5, 2012

Biology
The genes for hair color and eye color are linked
March 2, 2012

Math
r=40-2t shows the relationship between the average rate of speed, r, of a car in meters per second, and the time, t,in seconds, as the car slows down.
February 26, 2012

College Physics
A Fraunhofer diffration pattern is produced on a screen 210cm from a single slit. The distance from the center of the central maximum to the first-order maximum is 7560 times the wavelength (lambda). Calculate slit width. Answer in __m
February 23, 2012

College Physics
The lines in a grating are uniformly spaced at 1530 nm. Calculate the angular separation of the second order bright fringes between light of wavelength 600nm and 603.11nm. Answer in __mrad
February 23, 2012

statistics
f someone scored two Standard Deviations above the Mean on a standardized test where the Mean = 100 and the Standard Deviation = 15, then that person’s numerical score would be…? A. 125 B. 130 C. 160 D. 90th Percentile
February 20, 2012

Chidren,Families,and Society
Larry is a very aggressive four-year-old child.he watches many television programs that contain violence.it's most likely that
February 20, 2012

history
Help needed! I'm comparing France and the USA. If France had the Paris vs. Versaille conflict with regards to the city capital. As much as capitals showed the unity amongst the people, it also produced conflicts between different sectors of society. What did the United ...
February 19, 2012

Chemistry
How to prepare 100mL of 3% w/w Hydrogen Peroxide from 30% w/w Hydrogen Peroxide?Specific Gravity of 30%w/w Hydrogen Peroxide is 1.11g/mL. Can you please show the calculation steps? Thanks.
February 18, 2012

history
okay. thank you :)
February 18, 2012

history
Thank you. :) Though I was thinking, should it be "full potential"? or just the potential.. I mean, urban life is still moving forward so there's no way of telling that it has reached its full potential, right? :) Or maybe I'm just overthinking.
February 18, 2012

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