Friday
April 18, 2014

Posts by christine


Total # Posts: 425

math
A total of 1200 students attend top view high school. The ratio of teachers to students is 1:30. How many teachers are there at the school?

science
A viaduct is being re-levelled by using a jackscrew with a pitch of 5mm. The mass of the top slab of the viaduct is 20 tonnes (20000kg) and its length is 40m. The lever arm used to turn the jackscrew is 60 cm long. Calculate the effort force to be applied to the end of the lev...

physics
for the first question, there is 1g of water per 1 cm cube therefore there is 1000 kg of water per 1 m cube that is your answer for the 2nd one, im not sure

science
Three distinct layers of different tissue cells form the walls of blood vessels. The outer most layer is connective tissue. The middle layer is smooth muscle. The inner wall is primarily composed of endothelial cells.

french
I'm not sure I understand what youre asking here because I dont see any underlined words?

french
revois m'attendra irons emmenerons passerons

science
To stop an elevator in free fall, brakes are installed between the walls of the elevator car and the walls of the shaft in which the car moves. In addition, springs with compression coils are installed on the floor, at the bottom of the shaft, in order to absorb the residual e...

biology
For each of the following listed below, explain how it enhances the plants ability to survive and reproduce in a terrestrial environment. B) Pollen C) Waxy cuticle

Chemistry
How could hard water decrease the efficiency of your kettle?

Chemistry
Explain why the type of metal used in creating fireworks determines the colour seen when the fireworks are set off. Discuss what occurs within the metal atoms.

Chemistry
Explain what will happen to the volume of a gas as the pressure on that gas is increased. Assume that the temperature and amount of gas remain constant.

Chemistry
List three ways in which human activities have contributed to the production of gases that dissolve in water to form acid precipitation

Chemistry
If the percentage yield of a reaction was 78.51% and the theoretical yield was 288.0 g, what was the actual yield?

Chemistry
The percentage composition of chlorine, by mass, in the compound K2PtCl4 is

Chemistry
What is the difference between inference and observation?

Chemistry
Would distilled water conduct electricity? Why or why not?

Child care
I don't understand what Profit Margin is. How is the answer to 13 B? When the information provided, that the answer should be D.

college
I need help writing an outline for a persauasive essay?

biology
give 2 examples each of situations in which you might use the following pesticides Insecticides and fungicides

biology
explain the difference between gymnosperms and angiosperms give give 5 examples of each that are ontario native

biology
a) Describe the niche of the sea lamprey. b) Find out how sea lampreys may have entered the Great Lakes ecosystem. c) Identify the interspecific interactions of the sea lamprey and its effects on the Great Lakes.

biology
3. Describe the role of microorganisms (bacteria or viruses) in: a. Genetic manipulation and medical research b. Ecosystem (such as bacteria used as decomposers. Oil spill clean up) c. Food industry (microbes which are used to make yogurt)

Biology
Using the words hypertonic, hypotonic, and equilibrium correctly , predict what happens when, A) A living cell is placed into fresh water and B)A different living cell is placed into salt water.

English
I have to have 5 sentences with different verb tenses, stating The role of education in successful finanical planning.

Algebra 2 Honors
haha that would be funny, but really there are two of us here (:

Algebra 2 Honors
if that confused you, haley and i are working together.

Algebra 2 Honors
yes, but that is not an exact answer. i need a fraction of some sort, not a rounded decimal

Algebra 2 Honors
THANK YOU!

Algebra 2 Honors
1.25 is what i got

Algebra 2 Honors
im stupid

Algebra 2 Honors
The amount of light emitted from a battery indicator bulb pulses while the battery is charging. This can be modeled by the equation y = 60+60sin[(pi/4)t] , where y is the lumens emitted from the bulb and t is the number of seconds since the beginning of a pulse. At what time w...

Algebra 2 Honors
Find the exact value by using an appropriate sum or difference identity. cos(165) degrees

Algebra 2 Honors
Find all solutions if 0 degrees is less than or equal to x and x is less than 360 degrees. 2 sin^2(x)+ sin(x)=1

Algebra 2 Honors
sin 2x(cot x + tan x) = 2 (verify the identity)

Grammar,
Please can you tell me if these are correct. Identify the noun clause. I put brackets around them. 1. (How the secret leaked out) was not immediately apparent. 2. (Where the stall has moved to) has not been ascertained. 3. The invited guests said (they would attend the party.)...

Grammar again
What is the difference between a noun phrase and a noun clause? This says to change box b into noun phrases to match box A. Example: I can't get over... I hear her rude comments. I can't get over hearing her rude comments. But in this section of the book, it explaines ...

Noun phrases
We have to identify the noun phrases, I've put brackets around them. 1. (the children) are playing in the back garden. 2. Justin came to school with his (younger sister). 3. (the old woman) hobbled into the kitchen. 4. Look at (the short ugly looking boy) who is throwing t...

Chemistry-Dr. Bob
Please help me in any way to relate the concepts of how heat, solutions,equillibrium, nuclear and organic chemistry are interrelated. I appreciate any direction or info you could provide, Dr. Bob Thank you

chemistry
A certain gas has a volume of 20 cu ft and a pressure of 10psia at -40 degrees F. What is the new pressure if the gas is compressed to 5 cu ft at -40 degrees C.. a. 0.025 psia b. 0.4 psia c. 10 psia d. 40 psia.

statistics
would the percentage of scores greater than 120 be 4.865 or 4.87

statistics
assume that a set of test scores is normally distributed with a mean of 100 and a standard devaiton of 20. Use teh 68-95-99.7 rule to find the following quantities: a. percentage of scores greater than 120

Chemistry
What is the formula for calcium oxalate dihydrate when 100 degree Celsius heat is added?

statistics
99.0-98.2/0.62 Answer = 1.29 Is this correct?

statistics
assume the body temperature of healthy adults distributed with a mean of 98.20F and a standard deviation of 0.62F. If you have a body temperature of 99.00F, what is your percentile score?

statistics
Using teh 68-95-99.7rule. Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the following quantities: a. percentage of scores less than 100 b. relative frequency of scores less than 120 c...

statistics
Which of the following statements are correct? a. a normal distribution is any distribution that is not unusual b. the graph of a normal distribution is bell-shaped c. if a population has a normal distribution, the mean and the median are not equal d. the graph of a normal dis...

math
Electrical system are governed by Ohm's law, which states that V = IR, where V=voltate, I=current, and R=resistance. If the current in an electrical system is decreasing at a rate of 9 A/s while the voltage remains constant at 14 V, at what rate is the resistance increasin...

Calculus
Find the derivative of (sin(^3)x)(tan x) Please explain to me in steps please , thank you

English
how peple come from

English
hi how are you

Chem
delta h is 2800

Math7
Find the cost of the following situation. Dress Sale: Regular:$160 Now:$112 What % is given on the price of the dress?

math
The basketball coach wants to know the perimeter of the court. The area of the court is 4700 feet2. What is the perimeter? The long side of the court is 94 feet.

Physics
A bullet with mass 0.40 kg is fired with an initial velocity of 400 m/s from a gun with mass 5.0 kg. The speed of the recoil of the gun is?

managerial finance
Find the current value per share of Suarez Manufacturing’s common stock.

Eth125
I just wanted to know if anyone has a course syllabus for this class. I start this class very soon and I would like to get a head start. Thank you so much.

soc 300
Explain the Modernization and Dependency theories as they relate to underdevelopment. What are the major contributions of each theory and what are the greatest weaknesses? Explain which theory of underdevelopment has greater empirical support, particularly statistical support?...

algebra
Distributive, Associative, or neither? 3(bz)=(3b)z

physics
When a horizontal force of 7N acts on a block on a resistance free surface, it produces an acceleration of 3.5m/s^2. suppose a second 4kg block is dropped onto the first. what is the magnitude of the acceleration of the combination if the same force continues to act? Assume th...

Physics
Problem:: A 4.80 kg block located on a horizontal frictionless floor is pulled by a cord that exerts a force F=13.5 N at an angle q= 17.5° above the horizontal. What is the speed of the block 3.90 seconds after it starts moving? What I've got:: Using sin and cos, I'...

geometry
a right trapezoid

4th grade
need help with edhelperku puzzle

college
The clarke family went sailing on a lske . thier boat averages 6 kilometers per hour

physics
A 70.0 kg climber is supported in the "chimney" by the friction forces exerted on his shoes and back. The static coefficients of friction between his shoes and the wall, and between his back and the wall, are 0.760 and 0.610, respectively. What is the minimum normal ...

Skills for Learning in an Information Age
What are some ways in which you may make use of Web-based information and guard against plagiarism?

psychology 11
ya i think d. too.

English
Your Welcome!

English
Humerus I think is a bone and humorous is funny.

English
I would say #2 because it sounds better.

English
#1 is grammatically corect I think it sounds better. In #4 They will make you get better grades. The correct way to say that is They will help you get better grades. In #5 From your friends you can get help. The correct way to say that is You can get help from your friends.

7th grade
What is the definition of the word "hamebells" from the book "The Red Pony" by Steinbeck. I have searched all dictionary sources I could and can't seem to find out anythin on it. Is it, perhaps, a slang word for something else?

algebra
Do this problem one step at a time. Parenthesis's first, then multiplecation and division, next then adding and subtracting. Think of P.E.M.D.A.S.

Chemistry
student perform 2 melting point determinations on a crystalline product. In one determination, the tube contained a sample 1 - 2 mm in height, and the melting point was 141 - 142 ¢ªC. In the second determination, the sample hight was 4 - 5 mm and the melting range wa...

Chemistry
Student in O-Chem Lab conducts a melting point experiment with an unknown compound and observes a melting range of 210 – 218C. Is this a typical range for a melting point? If not, what range would be typical? For this question, does it mean an unknown compound in general?...

O-Chem
Yea my prof was not very clear or did not clarify what hot water would be. Thanks for the help.

O-Chem
Then the minimum volume of hot water then is 2.70mL

O-Chem
Find the minimum volume of hot water needed to dissolve 100 mg of salicylic acid. Can someone help me how to start this out? I would greatly appreciate it. The data is [temp] [amount of salicylic acid per 100 ml water, g] 0 0.10 10 0.13 25 0.23 50 0.63 75 1.8 90 3.7

integration
please help emergency. find double integral of x times y time e to the <x plus y> . bounded from <0,1> x <0,1>

Math
Can someone please check my answers below for accurateness? The instructions are: Differentiate and simplify. 1) y=(2x^2+3x-1)(3x^2-5x-3) y'=(4x+3)(3x^2-5x-3)+(2x^2+3x-1)(6x-5) 2) y=(5x^2+3x-1)(3x^2-5x-3) y'=(10x+3)(4x^2-3)+(5x^2+3x-1)(8x) 3)y=6x^3-7x^2+5x-7+x^(5/3)-7/...

Math
a) determine the equation of the line that is perpendicular to the tangent to y=5x^2 at (1,5). b) determine the equation of the line that passes through (2,2) and is parallel to the line tangent to y=-3x^3-2x at (-1,5).

Health
AIDS/HIV funding and Research

English
his melancholy state of mind or his melancholy state-of-mind

English
what about post-death

English
loved-one or loved one

English
so age-group or no ?

English
Occur age group after age group and repeat time after time Should there by any dashes or hyphens here? should it be like: occur age-group after age-group and repeat time-after-time ???

algebra 2
x-1/x^2-x-20 Give the equivalent numerator if the denominator is (x - 5)(x + 4)(x + 3).

Math
A) A rectangle has perimeter 64 cm and area 23 cm^2. Solve the following system of equations to find the rectangle's dimensions. length=23/width length + width = 32 B) Solve the system of equations x^2+y^2=1 xy=0.5

Math
The dimensions of a gift box are consecutive positive integers such that the height is the least integer and the length is the greatest integer. If the height is increased by 1 cm, the width is increased by 2 cm, and the length is increased by 3 cm, then a larger box is constr...

Math
I just have a quick question regarding this question: Simplify. State any restrictions on the variables. log(x^2+7x+12)-log(x^2-9) my answer is log[(x+4)/(x-3)] which is correct. However, for the restrictions, I believe that they are: x>3 and x<-4.. But the back of the b...

pre-calc
How bright a star appears can depend on how much light the star actually emits and how far away it is. The stellar magnitude scale can be adjusted to account for distance as follows: m_2 - m_1 = log (b_1/b_2) Here, M refers to a star's absolute magnitude, that is, how brig...

Advance Math
The path around a square flower bed is 3 feet wide. If the area of the flower bed is equal to the area of the path, find the dimensions of the flower bed.

government
in a political party, what is the job of precinct captain?

government
the trying of impeachments is done by who?

government
who solves the disputes over issues in congress? the correspondence committe, the committee of conference, or the core committee.

Science
What are ten scientific facts found in Jurassic park? Include page numbers for reference.

business
what are the consequences if payroll information is not entered precisely?

uite rate
unit rate of 250 miles in 4hrs

s.s
Did the Constitution resolve the weaknesses in the Articles of Confederation?

s.s
What was the debate between North and South over counting slave populations?

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