Sunday
April 20, 2014

Posts by MAry


Total # Posts: 3,169

Math
Yes, sorry about that.

Math
Which of the following formulas could be used to calculate the combined area,x of threw identical circles? A. X= 3pie r squared B. X= 6 pie r C. X= pie r squared/ 3 D. X= 6 r/ pie

math
I need to know when you have lettets how csn you deternine what the numbers will be. Ex: GRAPE - PLUM = APPLE. How would I he able to know what numhers represent the letters? Thanks

statistics
A resher ranoumly selects and intreviews 10 male and 100 female college teacher. type of sampling technique?

science
Imagine a marble dropped from a tall building at 1.62 meters per second. How long would the marble be in the air. Velocity= Gravitational acceleration x time

english
Carl showes self-hatred. Also known as the death drive in the book when he says "I hate my life I want to die right now."

Physics
A sled of mass 5.98 kg is coasting along on a frictionless ice-covered lake at a constant speed of 1.42 m/s. A 1.98-kg book is dropped vertically onto the sled. At what speed does the sled move once the book is on it?

social studies
The knights role and fall of feudalism

math
If the cost of a cell phone has decreased 400% during the past 10 years, does that correspond to a decrease of four times?

Chemistry
Calculate the pH after 0.10 mol of HCl is added to 1.00 L of the solution that is 0.57 M HF and 1.13 M KF. I got 3.01, but it is wrong. What did I do wrong?

Physics
Initially, mass one (2.10 kg) has a velocity of 5.90 m/s and mass two (2.80 kg) is at rest. After they collide, mass one emerges at an angle theta = 33.0 degrees. What is the speed of mass one after the collision if the collision is completely elastic? (Note, there are actuall...

Physics
Initially, mass one (2.10 kg) has a velocity of 5.90 m/s and mass two (2.80 kg) is at rest. After they collide, mass one emerges at an angle theta = 33.0 degrees. What is the speed of mass one after the collision if the collision is completely elastic? (Note, there are actuall...

math
m=-2/3; b=45

Biology
Will iodine react with sucrose or glucose? I would say no, because it reacts with starch, a polysaccharide, and glucose is a monosaccaride and sucrose is a combination of fructose and glucose, two monosaccharides. Am I right? Why or why not? How does iodine cause a reaction to...

math
There are two red cards in each suit that are multiples of ten: 5 and 10. There are two red suits: hearts and diamonds. Therefore there are four cards that are red AND multiples of 10. Your chances of drawing a red card that is a multiple of ten is then 4 out of 52. Reduce to ...

Biology
Sra - PLEASE DO NOT REPLY WITH WEBSITES!!! (This one didn't even work :-P). People then do not give legitimate answers because they think the question has already been answered. In addition, I only post on here when I have exhausted the Internet searching for answers to my...

Biology
Will iodine react with sucrose or glucose? I would say no, because it reacts with starch, a polysaccharide, and glucose is a monosaccaride and sucrose is a combination of fructose and glucose, two monosaccharides. Am I right? Why or why not? How does iodine cause a reaction to...

maths
There are 1000 gm in a kilogram. Therefore, 1 kg 400 gm is the same as 1 400/1000 kg. Reduce your fraction and you have your answer.

Chemistry
How many atoms of each element are present in five formula units of calcium permanganate?

chemistry abs spectrum and wavelength analysis
Wow! Thank you, that makes a lot of sense! I know what you mean by successive approximations, I didn't think of it like that before.. Thank you so much again :)

chemistry abs spectrum and wavelength analysis
Hello, can someone please help me? I'm stuck on a question: I'm doing an analysis of the absorbance of FeSCN2+ at it's max wavelength (i.e. 450nm where abs=0.154)The species I used to make the solution tested were Fe(NO3)3, HNO3, and KSCN. Now, the question is: Sup...

chemistry abs spectrum and wavelength
Hello, can someone please help me? I'm stuck on a question: I'm doing an analysis of the absorbance of FeSCN2+ at it's max wavelength (i.e. 450nm where abs=0.154)The species I used to make the solution tested were Fe(NO3)3, HNO3, and KSCN. Now, the question is: Sup...

Chemistry
An excess of aqueous AgNO3 reacts with 24.5 mL of 5 M K2CrO4(aq) to form a precipitate. What is the precipitate? Answer: Ag2CrO4 What mass of precipitate is formed? Answer in units of g.

8th grade science
how do I draw Isomers for octane

chemistry
If 100 grams of a saturated solution of lead nitrate is cooled from 60c to 20c, what will happen

chemistry
Aluminum has a specific heat capacity of 0.903J/g degree celsius. What mass of aluminum in g would require 500j of heat to raise its temperature by 12.5 degrees celsius

Physics
^Thanks

Physics
Two girls are at the same point on one side of a river that is 40m wide with a current flowing at 1.00m/s. Simultaneously, the dive into the water in an attempt to swim to the other bank of the river directly across from where they started. Both swim at 2m/s relative to the wa...

health,safety,nutrition training for early childho
what are some considerations for the development of well-defined health,safety and nutrition practices for an early learning environment

accounting
The columns of the employee earnings record do consist of the amounts withheld for the current pay, and the amounts withheld YTD, that are accumulated.

Physical science
what are your name

math
6.6+.8x=0.2 what does x equal

chemistry
how many grams of lithium sulfate will be formed when 25 grams of sulfuric acid react with an excess of lithium hydroxide in the following reaction

history
thanks!

history
do the usa and china leaders cooperate to solve problems such as finance, trade,tyrants, and/or military actions?

Alg 1
A farmer has 165 feet of fencing material in which to emclose a rectangle area. He wants the length x to be greater than 50 feet and width y to be no more than 20 feet. write a system to represent this situation.

Math
Have to explain how to use a graph to determine the number of solutions system. Am lost on what they want.

Algebra
Explain how to use a graph to determine the number of solutions of a system?

Math
Have to explain how to use a graph to determine the number of solutions system. Am lost on what they want.

Physics
after the infant's push, but before the box came to a stop, the box accelerated at a rate of 2 m/s^2. what was the coefficient of kinetic friction between the box and the floor during its motion?

physics
A car traveling at 62 km/h hits a bridge abutment. A passenger in the car moves forward a distance of 58 cm (with respect to the road) while being brought to rest by an inflated air bag. What magnitude of force in newtons (assumed constant) acts on the passenger's upper to...

English
Background You’ve applied for a specific job in your field of study. The Human Resources Department arranges an interview and tells you to bring with you a polished piece of writing for them to evaluate your writing skills. The paragraph must describe one particular expe...

physics
In an auto accident, a car hit a pedestrian and the driver then slammed on the brakes to stop the car. During the subsequent trial, the driver's lawyer claimed that the driver was obeying the posted 35.0 mph speed limit, but that the limit was too high to enable him to see...

Chemistry
would on mole of nitrogen gas have the same volume as 32g of oxygen gas? Explain.

algebra
I have a space 43 foot long, and 22 stones 10 1/2" diameter each, how far apart to space them?

critical thinking
I was needing help I don't know what they mean

critical thinking
Consider a situation or situations in your personal life where you feel you have used inductive or deductive reasoning to come to a conclusion.

Math
The perimeter os a tennis court is 228 feet and the lenght is 42 feet longer than the width. Write a linear system. Let w be the width of the tennis court and let l be the lenght of teh tennis court. Graph teh linear system.

Math
Earn al least $150 a week. $10 per hour working for a farmer. $5 per hour babysitting. can work at most 25 hours per week. Write and graph a system of linear inequalities.

bio
what are the two structural components of a chromosome

us history
what is your opinion on if the united states should have became isolated after the cold war to maintain peace

math
a midwestern music competition awarded 32 ribbons. the number of blue ribbons awarded was 3 less than the number of white ribbons. the number of red ribbons was 2 more than the number of white ribbons. how many of each kind of ribbon was awarded?

chemistry
how many grams of NaCl (molecular weight 58.5) should be used to prepare 20 liters of a solution containing 154mEq/L?

SOCIAL STUDIES
DID THE THE CIVIL WAR BEGIN BEFORE THE THE AMERICAN SPANISH WAR

math
if you have 15 coins in a bag and their total amount is $2.70 how many quarters and dimes are in the bag? Use substitution to solve

History
What led to the end of the reconstruction era?

biology
Suppose that the concentration of H+ in solution #1 is 10,000 times greater than the solution #2. What can you conclude about the difference in pH of these two solutions?

science
A rifle bullet travels 5000 feet in 4 seconds. what is the speed of the bullet?

Math
How do you multiply monomials without an exponent as one of the numnbers? The problem is 1 to the 4th times 1.

algabra
Write a quadratic equation in the variable x having the given numbers as solutions. Type the equation in standard from, as^2+bx+c=0 the solutions are (-3,1)

math
Given the following sets, select the statement below that is true. A = {r, i, s, k, e, d}, B = {r, i, s, e}, C = {s, i, r} (Points : 2) B ¼ A and B ¼ C A ¼ C and C ¼ B B º A and C ¼ A C º A ...

calculus please help
I posted this below but had no response. I would appreciate help with details please.How do I find the indefinite integral of h(u)=sin^2(1/5u) this is one fifth u. Does it involve double angle formulas? Thanks.

physics
An arrow is short vertically upward with an initial speed of 25m/s. When it's exactly halfway to the top of its flight, a second arrow is launched vertically upward from the same spot. The second arrow reaches the first arrow just as the first arrow reaches its highest arr...

calculus
How do I find the indefinite integral of h(u)=sin^2(1/5u) this is one fifth u. Does it involve double angle formulas? Thanks.

list some harmful effects of plagiarism.
Of course people who engage in plagiarism also hurt others: for one, their classmates, and for another, the school or university they attend. At the very least, turning in plagiarized work is unfair to students who do their own work. It also jeopardizes the integrity of the gr...

AIU
Internet has become a very popular research tool for patients to research different health care conditions and possible treatment options. Now, more than ever, patients are becoming more informed of their medical conditions from sources other than their physicians and other me...

chemistry
the thermal decompostion of 26.4g of CaCo3 produced10.6g calcium and 3.17g carbon. calculate the mass of oxygen produced in this reaction.

Math
An isosceles triangle and a rectangle share a base. The area of the rectangle is 4 times the area of the triangle. The area of the triangle is 60 cm^2 and its height is 15 cm. Find the dimensions of the triangle.

Statistics
The lower the values of alpha - would cause exponential smoothing to respond the most slowly to forecast errors?

Rounding Decimals
round 3,722-1,286

science
how are resources brought up from the earth's surface?

science
A bird sits on a pole and watches waves. The wave crests are 1.0 meter apart. If one wave crest passes the pole each second, what is the speed of the wave? . What is the period of the wave? . What is the frequency of the wave? . If the waves change so that the distance between...

geometry
What is the approximate measure of sqt

physics
Work out the gravitational potential energy of a 2kg brick at a height of 9 metres.

bus math
the loan is$ 50,000 at 9%for 7 years ? what is the first payment and the unpaid balance after the first year

Physics
Water at a pressure of 400,000Pa flows through a horizontal pipe at a speed of 1.50 m/s. The pipe narrows to 1/8 its original diameter. What is the flow speed through the narrow section?

grammar
justice

grammar
what is the subject for "There was justice in the verdict"

geometry
What is the permineter and area of a rectangle that has a length of 8 feet and width of 3 feet.

Chemisrty
When 7.76 grams of magnesium bicarbonate are mixed with 300. mL of 0.10 M hydrocyanic acid, how many liters of gas are evolved at STP?

Chemistry
Let me show you my work. 2Ag+2C2H4O2=2AgC2H3O2+H2 I found M of Ag 0.0142 to give me M of H 7.09x10-3 when I plug it back into the equation Pv=nRT I got .0158 L. I put it in as my answer and it tells me I forgot to check something. What am i doing wrong?

Chemistry
When 1.53 grams of silver metal are dropped in 500. mL of 2.0 M acetic acid, how many liters of gas are evolved at STP?

Chemistry
When 2.05 grams of aluminum metal are dropped in 650. mL of 6.0 M hydrochloric acid, how many liters of gas are evolved at 20°C, 1.07 atm?

Chemistry
When 7.76 grams of magnesium bicarbonate are mixed with 300. mL of 0.10 M hydrocyanic acid, how many liters of gas are evolved at STP?

Chemistry
When 1.53 grams of silver metal are dropped in 500. mL of 2.0 M acetic acid, how many liters of gas are evolved at STP?

Chemistry
When 2.05 grams of aluminum metal are dropped in 650. mL of 6.0 M hydrochloric acid, how many liters of gas are evolved at 20°C, 1.07 atm?

Algabra
Kathy bicycles 5 KM/h faster than Javier. In the same time it takes Javier to bicycle 57 km, Katy can bicycle 72 km. How fast does each bicyclist travel?

Chemistry II
Calculate the energy pulled from 500 grams of Water at 20.0 degrees Celsius to Ice at 0.0 degrees Celsius. What happens to the energy? How much Freon-11 must circulate through the freezer in order to freeze the 500 gram sample of Water?

algebra
they both equal y so set them = to each other. 3x-4=2x-1 x=3 y=3*3-4 y=5 d is the correct answer

math
possibilities 564 and 645 so the odd number is 645

statistics
What scale of measurement is used when the data is divided into ranges and in which the distance bet.ween the intervals is meaningful

fractions
1/3 and 1/4 1/3 is 4/12 and 1/4 is 3/12 they have the same denominator and their difference is 1/12. The hint is that when you subtract the denominators must be the same.

algebra
-6/8-6/8= -12/8 this can be reduced to -3/2 or- 1 1/2

literature
if you consider the call of the wild to be an allegory which one of the following statements would be true

physics
A 1.75-kg block is at rest on a ramp of height h. When the block is released, it slides without friction tothe bottom of the ramp, and then continues across a surface that is frictionless except for a rough patch of width 10.0 cm that has a coefficient of kinuetic friction u=0...

St.Nicholas Adult High School (English)
the slogan "got milk'. Ido not the what this question means. can tell me the answer please thank you,

St.Nicholas Adult High School (English)
the sentence'15%of adult height is added during teen years." Ineed response and explaination. I'am so confused about that question.

Algebra 2
Let f(x)=x^2+1 and g(x)=2x^2 find G(f(x))

Biology!!
Darwin is considered the "father of evolutionary biology." Four of his contributions to the field of evolutionary biology are listed below. The nonconstancy of species. Branching evolution, which impleies the common descent of all species. occurrence of gradual chang...

algebra
Simplify: (negative 7 minus negative 7)-(negative 7 minus 7squared).

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