Friday
May 6, 2016

# Posts by brittany

Total # Posts: 908

Pre-Algerbra
In which quadrant does the point lie? Write the coordinates of the point. Point B A. quadrant II; (–2, –4) B. quadrant III; (2, 4) C. quadrant III; (–2, –4) D. quadrant IV; (–4, –2)
October 17, 2012

Chemistry/Quantitive Anaylsis
Determine the absolute and percent relative uncertainty expressing the result in the correct number of significant digits a.) 6.2 (+-0.2)-4.1(+-0.1) b.)[9.23(+-0.03)][4.21(+-0.20}/21.1(+-0.2) c.)log[3.1415(+-0.001)] d) log[(0.104(+-0.0060)]^1/2 /0.0511(+-0.00090]
October 14, 2012

Chemistry/Quantitive Anaylsis
Before determining the amount of sodium carbonate in a sample by titration with standard hydrochloric avid the anaylst decide to check the procedure by analyzing a known sample of 98.75 (w/w)% purity. Five replicate determinations of the known gave the following results: 98.71...
October 14, 2012

Chemistry
The amount of energy released by burning a fuel source, measured in energy per mass, is called the fuel value. If all the energy obtained from burning 1.30 pounds of methane (fuel value is 11.97 kcal/g) is used to heat 122.0 kg of water at an initial temperature of 21.1 °C...
October 11, 2012

college stats
A study wants to examine the relationship between student anxiety for an exam and the number of hours studied. The data is as follows: Student Anxiety Scores Study Hours 5 1 10 6 5 2 11 8 12 5 4 1 3 4 2 6 6 5 1 2 Why is a correlation the most appropriate statistic? What is the...
October 8, 2012

Early childhood education
Awesome! Thanks!
October 3, 2012

Early childhood education
Special educational services for young children with disabilities: a. Cannot be enforced through laws. b. depend on parent efforts. c. do not involve the Head Start Program. d. are rooted in federal legislation. I'm thinking D is the correct answer?
October 3, 2012

Exceptional Children
Most early childhood professionals children’s agree that the terms inclusion and mainstreaming: A. Both refer to exceptional children’s participation in the general education curriculum. B. Mean the same thing. C. Are two different concepts. D. Both refer to programs...
October 3, 2012

English
I had to write a paragraph about a personal experience of mine with no passive verbs. When I submitted mine my teacher told me it was almost correct but not right yet. Could you tell me a list of passive verbs?
October 1, 2012

Computers
What are calculations entered into a spreadsheet called? Formulas? Or Values? I'm thinking its formulas but Values talks about calculations on a spreadsheet too.
September 27, 2012

geometry
PM is the median of trapezoid KLNO. If ON = 24 centimeters and KL = 12 centimeters, which is the length of PM
September 26, 2012

math
You need to prepare 180g of a 10% cream using 30% stock cream base.how much is needed for each
September 20, 2012

literary
I need an example of connotation from the Star Wars series in the form of a quote.
September 16, 2012

Bio
Assume that a cell culture has a density of 108 cells/mL. You transfer 20 microliters (20 L) of this culture onto a microscope slide. How many cells do you expect will be in this 20 L drop you placed under the microscope?
September 13, 2012

geometry
Given letters gb and gf how do you write a mathematical to compare their measures?
September 7, 2012

Statistics
An important measure of the performance of a locomotive is its "adhesion," which is the locomotive's pulling force as a multiple of its weight. The adhesion of one 4400-horsepower diesel locomotive model varies in actual use according to a Normal distribution ...
September 5, 2012

Statistics
An important measure of the performance of a locomotive is its "adhesion," which is the locomotive's pulling force as a multiple of its weight. The adhesion of one 4400-horsepower diesel locomotive model varies in actual use according to a Normal distribution ...
September 5, 2012

physics
If you walk for 1.66min at a speed of 1.22m/s and then run for 1.66min at 3.05m/s along a straight track, what is the average velocity?
August 22, 2012

Social Studies
its not a or b cause i took the test the answer is cold war spending
August 15, 2012

Math- STATS 218
When the following hypotheses are being tested at a level of significance of aH0: m 100 Ha: m < 100 the null hypothesis will be rejected if the test statistic Z is a. >Z b. >Z c. <Z d. <100
July 27, 2012

critical reading
Elaborate comparisons which are used by advertisers are usually _____. A)fallacies of evidence. B) fallacies of language. C)newsworthy. I think it is B, is this correct?
July 12, 2012

Math
Calculate the percentage strength of hydrocortisone if you combine 30 g of 1%, 45 g of 0.5%, and 15 g of 2%. Round to the hundredth.
July 6, 2012

Math
Androgel is available in 1% strength. A provider prescribed it for a patient but would like to minimize side effects by starting treatment at a lower 0.3% strength. How much androgel should be added to a base gel to prepare 15 g of the desired strength?
July 6, 2012

Phamacy School
What is the percentage strength of tretinoin gel when you combine 15 g of 0.025% and 30 g of 0.01%?
July 6, 2012

MATH
What is the percentage strength of tretinoin gel when you combine 15 g of 0.025% and 30 g of 0.01%?
July 6, 2012

MATH
Calculate the percentage strength of hydrocortisone if you combine 30 g of 1%, 45 g of 0.5%, and 15 g of 2%. Round to the hundredth.
July 6, 2012

MATH
Calculate the amount of 8% acetic acid needed to combine with water to make 600 ml of 3.5% acetic acid.
July 6, 2012

math
What answer did u get
June 25, 2012

English III
# 3 is B
June 9, 2012

GEOMETRY
if AB=5X+3 and BC=7x-9 what is the value of AC? using the addition segment postulate
June 6, 2012

Stats
I posted this question straight from the quiz, so I'm not sure why you're confused.
May 26, 2012

Stats
Find the number z (± 0.01) such that the proportion of observations that are less than z in a standard Normal distribution is 0.8 Find the number z (± 0.01) such that 59% of all observations from a standard Normal distribution are greater than z
May 26, 2012

history
Which system of Spanish government did haciendas replace? A. the encomienda B. popular sovereignty C. socialism D. coalitions
May 25, 2012

algebra 2
find the exact value using the unit circle cos 3.14/6
May 24, 2012

geometry
PLEASE HELP WITH A FEW QUESTIONS triangle ABC has side lengths 8, 15, and 17 do the side lengths form a pythagorean triple? the length of the hypotenuse of a 30-60-90 triangle is 7 find perimeter to approach the runway, a pilot of a small plane must begin a 10descent starting ...
May 23, 2012

geometry
I was looking for how to do proportions, i had forgot.
May 23, 2012

geometry
Thanks for the help on one problem
May 23, 2012

Chemistry
I need help with the Lewis Dot Structure. I'm so lost. The problems I have and need help with are 1) H2NCH3 2) C3H6 3)NO2-ion 4) H3CSCH2F 5) NCl3 6) H2NCOOH 7)C3H7OH
May 23, 2012

History
What were the causes of the War of 1812? Where did Republicans and Federalists stand on declaring and then fighting the war? What regional tensions did the war expose?
May 22, 2012

Chemisty
A 2.5 L volume of sodium hydroxide solution was prepared. The titrant was standarized against primary standard oxalic acid dihydrate, H2C2O4*H2O(molar mass is 126.06) if a 0.4774g sample of the prmiary standard consumed 31.94mL of the base solution in reaching the ...
May 9, 2012

Chemistry
A Student Performing a lab weighed a 1.0993g sample, containing an unknown KHP, which required 18.06mL of 0.1879M NAOH to reach the phenolphtalein endpoint. a) How many moles of base were consumed by the KHP in this sample? b) How many grams of KHP were titrated? c)What is the...
May 9, 2012

english
According to the Introduction, who encouraged Mary Shelley to expand Frankenstein into a full-length novel
May 8, 2012

statistics
Whats the difference between creating a z score from a single score and creating one fron a sample mean?
April 30, 2012

English 4
the choices are: A-the birds were flying over the sea in a straight formation B-the seas were rough C-there was a faint outline of the old man in the crescent of the new moon D-all of the above
April 30, 2012

algebra
How would I show my work for: 3-2(3)+2(4)+1
April 28, 2012

Intermediate Algebra (college)
Use the properties of logarithms to condense the expression 1/3[ln(x - 6)- 4 ln y - 2 ln z]
April 26, 2012

Precalc
if sine theta=.3416 and theta is in quadrant I what is cos theta/2? Using double angle identities.
April 26, 2012

statistics
I guess 100 is the highest the mean is 30.9 and the standard deviation 2.08 it just says children below the 30th percentile
April 19, 2012

statistics
Children below the 30th percent are in need of special assistance assistance what raw score makes the cut off score for these children?
April 19, 2012

Physics
Two parallel wires conduct equal currents in the same direction. (a) At a point in the plane of the wires midway between them, do the individual fields of the wires cancel or reinforce each other? (b) At a point far away from the wires, do their individual fields tend to ...
April 17, 2012

AP Chemistry
A voltaic cell is constructed that uses the following half-cell reactions. Cu+(aq) + e- Cu(s) I2(s) + 2 e- 2 I -(aq) The cell is operated at 298 K with [Cu+ ] = 2.3 M and [I - ] = 3.3 M. (a) Determine E for the cell at these concentrations. (b) If [Cu+ ] were equal to 1.0 M, ...
April 16, 2012

AP Chemistry
A voltaic cell is constructed that uses the following half-cell reactions. Cu+(aq) + e- Cu(s) I2(s) + 2 e- 2 I -(aq) The cell is operated at 298 K with [Cu+ ] = 2.3 M and [I - ] = 3.3 M. (a) Determine E for the cell at these concentrations. (b) If [Cu+ ] were equal to 1.0 M, ...
April 16, 2012

CHEM
Given the equation 2C8H18 + 25O2 = 16 CO2 + 18H2O: The combustion of octane produces carbon dioxide and water. If you start with 10.0 moles of octane, what mass of water (in grams) would you expect to produce?
April 3, 2012

Chemistry 1201
thankyou so much! i got 3.65*10^25
March 28, 2012

Chemistry 1201
A solution of ammonia and water contains 1.00×1025 water molecules and 5.50×1024 ammonia molecules. How many total hydrogen atoms are in this solution?
March 28, 2012

chemistry
Calculate the enthalpy change for converting 10.0g of ice at -25 degrees Celsius to water at 80 degrees Celsius. The specific heats of ice, water, and steam are 2.09j/g degrees Celsius, 4.18j/g degrees Celsius, and 1.85j/g degrees Celsius. The enthalpy of fusion for water is 6...
March 28, 2012

chemistry
How do I do a question like this please help and explain it!! Calculate the pH of a buffer solution that contains 0.22 M benzoic acid (C6H5CO2H) and 0.24 M sodium benzoate (C6H5COONa). [Ka = 6.5 × 10-5 for benzoic acid] Round your answer to two places past the decimal.
March 25, 2012

Chem 111
A solution is prepared by mixing 499 mL of 0.19 M Tris·Base and 592 mL of 0.37 M Tris·Acid. What is the pH of this solution? [Ka(Tris·Acid) = 8.5 × 10-9] Round your answer to two places past the decimal. I can do basic pH questions but I am at a loss...
March 25, 2012

math
A town has a population of 32,000 in the year 2002; 35,200 in the year 2003; 38,720 in the year 2004; and 42,592 in the year 2005. If this pattern continues, what will the population be in the year 2016?
March 10, 2012

geography
Which region of southern grasslands in south america have rich deposits of oil and bauxite?
March 9, 2012

geography
which region of the southern grasslands possesses rich deposits of oil and bauxite?
March 9, 2012

Chemistry
21 gCH3OH*(1 mol/32.01CH3OH)*(252.8/1 mol)
March 5, 2012

Chemistry
2CH3OH(g)->2CH4(g)+O2(g) Change in H=252.8 kJ
March 5, 2012

Chemistry
So far my equation is 21 gCH3OH*(1 mol/32.01CH3OH)
March 5, 2012

Chemistry
Calculate the amount of heat transferred when 21.0 of CH3OH(g) is decomposed by this reaction at constant pressure.
March 5, 2012

Chemistry
A gaseous reaction occurs at a constant pressure of 50.0 atm and releases 69.8 kJ of heat. Before the reaction, the volume of the system was 8.80 L . After the reaction, the volume of the system was 2.80 L . Calculate the total internal energy change, change in U , in kilojoules.
March 5, 2012

Adv. Function math
How would you set up this problem if instead of using 1000 feet of fencing, only 750 feet of fencing is used? Solve the problem to find the maximum area..
February 29, 2012

Finance
Say that you purchase a house for \$270,000 by getting a mortgage for \$235,000 and paying a \$35,000 down payment. If you get a 15-year mortgage with a 8 percent interest rate, what are the monthly payments?
February 27, 2012

Physics Please Help!
A solid disk with a mass ok 100 kg and radius of 0.2m turns clockwise through an angular displacement 10 rad when starting from rest attain its maximum angular speed of 1 revolution every 0.5s. How much time did it take for the disk to go from rest to maximum angular speed?
February 21, 2012

Physics
A solid disk with a mass ok 100 kg and radius of 0.2m turns clockwise through an angular displacement 10 rad when starting from rest attain its maximum angular speed of 1 revolution every 0.5s. How much time did it take for the disk to go from rest to maximum angular speed?
February 21, 2012

PHYSICS
A solid disk with a mass of 100kg and a radius of 0.2m, turns clockwise through an angular displacement 10 rad when starting from rest to attain its maximum angular speed, of 1 revolution every 0.5s. What is the angular acceleration that the wheel experienced in order to ...
February 20, 2012

Physics
A solid disk with a mass of 100kg and a radius of 0.2m, turns clockwise through an angular displacement 10 rad when starting from rest to attain its maximum angular speed, of 1 revolution every 0.5s. What is the angular acceleration that the wheel experienced in order to ...
February 20, 2012

algebra
use any three of the digits 2,3,4 and 6 to form an 8 digit factor and a two didgit factor with a estimated product that is between 140 and 250
February 18, 2012

phi 103
no fallacy committed
February 12, 2012

Physics
ohh okies thanks for clearing that up (:
February 12, 2012

Physics
i mean.. mr^2w+Iw = mr^2w+Iw ... which is equivalent to L+L = L+L
February 12, 2012

Physics
I don't really understand we use I1w1=I2w2? but according to your equation its mr^2+Iw = mr^2+Iw ... which is equivalent to I+L = I+L <-- i dont get this part? and the answer is 0.568 rev/s which according to your way is right but its 19 instead of 29.
February 12, 2012

Physics
A turntable of radius 2m rotates freely about a fixed vertical axis. A child 19 kg is standing on the turntable right at the outer edge and the system is initially rotating at an angular speed of 0.5 rev/s. The child then moves to position 1m from center of the turntable. what...
February 12, 2012

algebra
At a local ice cream shop, you can choose from a collection of 18 different toppings. If you want to choose at least one topping, how many different topping combinations are possible (assuming no repeat toppings)?
February 6, 2012

statistics
Sweden is reported to have among the highest percentage of citizens aged 80 years and over, at approximately 5.5 % (i.e. 5.5 % of it's population falls within this age category). Suppose 20 individuals are randomly selected from the population, and X is the number of ...
February 5, 2012

math
From an exteror point P that is h units form a circle of radius r, a tangent line is drawn to the circle. Let d denote the distance from the point P to the point of tangency T. Express d as a function of h.(HINT: if C is the center of the circle, the PT is perpendicular to CT)
January 30, 2012

biology
Explain the importance of carbon's ability to form covalent bonds in straight chains, branched chains, or rings.
January 24, 2012

chemistry
What mass of H2SO4 would be required to react with 0.59 mol of NaOH?
January 19, 2012

Math
How do I find the relative maximum and minimum and the zeros of f(x)=-x^3+16x^2-76x+96??
January 15, 2012

english
what does SS stand for in Shurley Method?
January 4, 2012

phyics
Find the horizontal range of a baseball that leaves the bat at an angle of 63 degrees, with the horizontal with an initial velocity of 160 km/hr. discard air resistance
December 14, 2011

physics
the diver acheives a horizontal velocity of 3.75 m/s from a diving platform located 6.0 m above the water. How far from the edge of the platform will the diver be when she hits the water?
December 14, 2011

Statistics
A study shows that 10% of americans are left-handed. Find the probability that at most one student is left handed in a class of 20 students.
December 9, 2011

Trig
1. Establish the identity: sin(theta+3pi/2)=-cos(theta) 2. Find the exact value of 2(theta) if sin(theta)=5/13 3. Show that: csc2(theta)-cot2(theta)=tan(theta) 4. Find the exact value of tan(cos^-1(square root of 3/2) 5. Approximate the value rounded to two decimal places: csc...
December 7, 2011

science
which of the following is a testable hypothesis helium, ammonia, oxidation-reduction?
December 6, 2011

physics
A hockey player shoots a puck, exerting a constant force of 30.0 N on the hockey puck for 0.16 seconds. What is the magnitude of the impulse given to the puck? 190 kg ∙ m/s 98 kg ∙ m/s 9.6 kg ∙ m/s 4.8 kg ∙ m/s
December 2, 2011

geometry
the angles in a pentagon measure x-30,x+20,x-30, x+30 and x find the measure of each angle.
November 28, 2011

geometry
the angles in a hexagon are 135, 62, 151, 140, x and x +6. find the measure of the missing angles.
November 28, 2011

chemistry
What is the solubility of silver carbonate in 0.1 M Na2CO3
November 17, 2011

chemistry
What is the solubility of silver carbonate (Ag2CO3) in pure water
November 17, 2011

world history
How did powerful families of Japan like the Fujiwara legitimate their power at court?
November 8, 2011

geometry
If the sum of the lenghts of two sides of a triangle is 15, what is the largest possible integral value for the third side?
October 17, 2011

chemistry
PE increases
October 11, 2011

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