Friday
August 22, 2014

# Posts by rebecca

Total # Posts: 814

Algebra
A phone company charges \$30 per month for a long distance plan plus a charge of \$.05 per minute. What would the monthly charge be for someone who talked two and a half hours?
August 8, 2014

Math
Financial aid students must pass 2/3 of their courses each term in order to continue their aid. If a student is taking 18 hours, how many hours must be passed?
July 20, 2014

Math
The entire can needs to be painted, including the top and bottom. If the diameter of the lid (x) is 5 cm, and the height of the can (y) is 9 cm, what is the approximate total surface area that will need to be painted?
June 17, 2014

Physics
Q: Japanese honeybees have a unique defensive mechanism against their natural predator, the giant hornet. When threatened by a hornet attacking the nest, worker bees will work together to surround the hornet, and then vibrate to create heat. If enough bees work together, the ...
May 8, 2014

Chemistry
You can purchase hydrochloric acid in a concentrated form that is 37.0 hcl by mass and has a density of 1.20g/mL. Describe how exactly you would prepare 2.85 L of 0.500 M HCL from the concentrated solution.
May 7, 2014

chemistry
I have two questions regarding enthalpy of reactions: 1.) Care must be taken when dissolving NaOH pellets in water because the temp. can rise dramatically. Taking NaOH as system, what can be deduced about the signs of the entropy of system and surroundings? Am I correct in ...
May 2, 2014

Chemistry
Based on the cell reaction: Zn(s)+Cu2+(aq)→Zn2+(aq)+Cu(s) Under standard conditions, what is the maximum electrical work, in joules, that the cell can accomplish if 55.0g of copper is plated out? Wmax=______ J
April 14, 2014

Chemistry
So I multiply Eu3+(aq)+e−→Eu2+(aq) by two so there is two e- in both half reactions. I also remember that I need to add H+ and OH- onto one or both sides depending if the reaction is acid or basic. How do I determine that?
April 14, 2014

Chemistry
Given the following half-reactions and associated standard reduction potentials: AuBr−4(aq)+3e−→Au(s)+4Br−(aq) E∘red=−0.858V Eu3+(aq)+e−→Eu2+(aq) E∘red=−0.43V IO−(aq)+H2O(l)+2e−→I−(aq)+2OH&#...
April 14, 2014

Chemistry
A voltaic cell utilizes the following reaction: 2Fe3+(aq)+H2(g)→2Fe2+(aq)+2H+(aq). What is the emf for this cell when [Fe3+]= 3.70M , PH2= 0.95atm , [Fe2+]= 7.0×10−4M , and the pH in both compartments is 4.05? Express your answer using two significant figures...
April 14, 2014

World Civilization
1. In 1789, the National Assembly revoked the privileges of the aristocracy. This occurred in reaction to A. a peasant uprising. B. Louis XVI's withdrawal of troops from Paris. C. discontent among the poor people of Paris. D. the storming of the Bastille 2. What was ...
April 11, 2014

World History
1 - B 2 - D 3 - B 4 - C 5 - B 6 - C 7 - C 8 - A 9 - D 10 - C 11 - C 12 - B 13 - D 14 - D 15 - B 16 - C 17 - A 18 - A 19 - C 20 - A
April 11, 2014

World History
1. In 1964, a loose union of Palestine refugees led to the formation of the Palestine Liberation Organization (PLO) under Yasir Arafat. What was the aim of the PLO? A. Driving Israel from East Jerusalem B. Establishing a Pan-Arab League C. Evicting Israel from Palestine D. ...
April 11, 2014

Contrasting East & West
1 - D 2 - D 3 - C 4 - A 5 - C 6 - B 7 - A 8 - B 9 - C 10 - C 11 - D 12 - D 13 - D 14 - A 15 - C 16 - D 17 - A 18 - B 19 - A 20 - B
April 11, 2014

Contrasting East & West
1. In 1938, British Prime Minister Chamberlain declared a final act of appeasement A. after Hitler attacked Poland. B. when Hitler's claim on the Sudetenland was accepted. C. immediately following the Nazi occupation of Austria. D. after Hitler's forces occupied the ...
April 11, 2014

pen foster literacy
When using the Internet as an information source what u should remember
March 31, 2014

Chemistry
Okay... I already know that. I plugged in all the numbers and I get 8.2*10^22, which is not the right answer. Can someone show the work for the problem please?
March 25, 2014

Chemistry
The degradation of CF3CH2F (an HFC) by OH radicals in the troposphere is first order in each reactant and has a rate constant of k=1.6×108M−1s−1 at 4∘C. If the tropospheric concentrations of OH and CF3CH2F are 8.1×105 and 6.3×108 molecules ...
March 25, 2014

Chemistry
The concentration of Ca2+ in a particular water supply is 5.7×10−3M. The concentration of bicarbonate ion, HCO−3, in the same water is 1.7×10−3M. What masses of Ca(OH)2 and Na2CO3 must be added to 5.6×107L of this water to reduce the level ...
March 25, 2014

Algebra One
If r = 9 units and h = 7 units, what is the volume of the cylinder?
March 15, 2014

Statistics
Prev Up Next (1 pt) Suppose that in the year 2000, the cost of a compact car averaged \$ 12600 and that in 2003, the cost averaged \$ 14100. Assuming that the relationship between year t and cost c is linear, develop a formula for predicting the average cost of a compact car in ...
March 8, 2014

Physics
The answer is Vc/r = 0.380 m/s at 63.3 degrees south of west
February 23, 2014

Physics
A canoe has a velocity of 0.480m/s southeast relative to the earth. The canoe is on a river that is flowing at 0.510m/s east relative to the earth. Find the magnitude of the velocity (V(C/R)) of the canoe relative to the river. Also, find the direction of the velocity of the ...
February 23, 2014

Math
Nissan Appliances bought three dozen camcorders at a cost of \$5,040. The markup on the camcorders is 30% of the selling price. What was the original selling price of each camcorder?
February 22, 2014

Help finding a good speech topic
Obesity Cyberbullying Drinking and Driving
February 19, 2014

finance
the target capital structure for QM industries is 45% common stock, 5% preferred stock and 50% debt. If the cost of common equity for the firm is 18.9%, the cost of preferred stock is 10.7% and the before tax cost of debt is 7.7% and the firm's tax rate is 35% QM's ...
February 9, 2014

Chemistry
How much heat energy, in kilojoules, is required to convert 63.0g of ice at −18.0 ∘C to water at 25.0 ∘C ?
January 26, 2014

physics
A ray of light goes through the centre of a semicircular glass disk, n = 1.58, and onto a wall (x = 19.4 cm, y = 5.06 cm). What is the incident angle, θ?
January 22, 2014

Government
What was the Court's reasoning in Marbury v. Madison?
December 5, 2013

density
Suppose two worlds, each having mass M and radius R, coalesce into a single world. Due to gravitational contraction, the combined world has a radius of only 3/4R. What is the average density of the combined world as a multiple of p0, the average density of the original two ...
December 1, 2013

Physics (algebra-based)
A child holds a candy bar 13.4 cm in front of the convex side-view mirror of an automobile. The image height is reduced by one fifth. What is the radius of curvature of the mirror? Answer in units of cm. I did 1/5=-image distance (i)/13.4-->i=-2.68 1/f=1/-2.68+1/13.4---->...
December 1, 2013

math
Marta's weekly pay for selling large screen televisions is determined by the formula S= \$275 + 80n where s is her pay in dollars, and n is the number of large televisions she sells that week. If Marta's pay last week was \$835, how many large screen televisions did she ...
November 25, 2013

sience
is coal renewable or non renewable
November 25, 2013

Government
What is the state-level equivalent of the president?
November 15, 2013

Government
Which is NOT a factor that reinforces America's two-party system? 1.)Broad ideological consensus limits the appeal of radical parties. 2.)The winner-take-all system makes it harder for third parties to gain popularity. 3.)The two-party system was preferred by the Founding ...
November 14, 2013

Government
well thank you! (:
November 13, 2013

Government
Which is not an argument in support of hate crimes legislation? a. Hate crimes legislation sends a message that the United States does not support bigotry. b. Hate crimes legislation ensures that perpetrators of these crimes receive serious punishment. c. Hate crimes are meant...
November 13, 2013

chem
What is the pH of 1.00 L of the buffer solution that contains 0.100 M HF and 0.120 M NaF after 0.020 mol of HNO3 is added? The Ka of HF is 3.5×10−4, and so pKa = 3.46.
November 11, 2013

Government
Explain the following quote "Liberty may be endangered by the abuses of liberty as well as by the abuses of power.". I have to answer questions about this, but I have no clue what it means..
November 5, 2013

physics
a projectile launched speed of 31.1m/s at angle 71.2 degrees above horizontal fill in table time 0 vx m/s 10.0m/s vy 29.4m/s ax? ay?
October 6, 2013

math
Quadrilateral ABCD has a perimeter of 26 and sides of integer lengths. If AB=m and BC=CD=DA=n, then what is the difference between the greatest and least possible values of n? A) 7 B) 6 C) 5 D) 4 E) 3
September 14, 2013

Physics
A particle starts at the origin at t=0 with an intial velocity of 5.0m/s along the positive x axis. If the acceleration is (-3.0,4.5) m/s^2, determine the velocity and position of the particle at the moment it reaches its maximum x coordinate. You can't use a calculator.
September 6, 2013

Sir Donald Bradman had scored 6996 runs in 69 completed test innings. he had one more innings to play. How many runs did he need to score in his final innings in order that his test batting average was greater than or equal to 100? You must write down the inequality that you ...
May 16, 2013

math
thank you
May 4, 2013

math
May 4, 2013

math
the 10 is on one of the lines of the polygon then a line from the center goes from the center to the edge of polygon inside with a doted line
May 4, 2013

math
Find the area of the regular polygon. Round your answer to the nearest tenth. the individual sides are 10 the radius is 13.07
May 4, 2013

math
Find the area of the regular polygon. Round your answer to the nearest tenth. Question 18 (2 points) Find the area of the regular polygon. Round your answer to the nearest tenth. a 673.3 inches squared b 483.2 inches squared c 336.6 inches squared d 966.4 inches squared the 10...
May 4, 2013

Life orientation
Hiv and aids
May 3, 2013

Life orientation
Describe the life style disease/behavior and explain factors that contribute to the disease.
May 3, 2013

Science
During an experiment, you find that you can dissolve 3.6 g of a substance in 300 mL of water at 25°C. How much of the substance would you predict that you could dissolve in 600 mL of water at the same temperature? Can somebody help me with this? I don't get it.
April 25, 2013

Math
Kevin has 18 unit cubes. How many different rectangular prisms can be built using all the cubes
April 21, 2013

maths
A bomber takes off and flies at 500kph. A fighter, setting out 2 1/2 hrs later flies at 750kph. How long will it take for the fighter to catch the bomber, and how far will the bomber have travelled at this time?
April 16, 2013

maths
A bomber takes off and flies at 500kph. A fighter, setting out 2 1/2 hrs later flies at 750kph. How long will it take for the fighter to catch the bomber, and how far will the bomber have travelled at this time?
April 16, 2013

maths
A bomber takes off and flies at 500kph. A fighter, setting out 2 1/2 hrs later flies at 750kph. How long will it take for the fighter to catch the bomber, and how far will the bomber have travelled at this time?
April 16, 2013

Math- Probability HELP
Tom Cruise is reported to be 5'7.8" tall. Male heights are normally distributed with a mean of 70 inches and a standard deviation of 2.8 inches. Find the probability that; 1) A randomly selected male is Tom Cruise's height or smaller. 2) Three randomly selected ...
April 7, 2013

Biology HELP
How would the production of gelatinase help a pathogen be more virulent?
April 7, 2013

maths
The percentage of sugar in a solution of sugar and water is 9%. If 4 litres of this solution is diluted by adding 500mL of water, what is the percentage of sugar in the new solution?
April 7, 2013

March 30, 2013

ap calculas
derivative of (-x^3+3)(3x+2)^3
March 25, 2013

ap calculas
derivative of (2x^3+5)cos2x^5
March 25, 2013

Physics
An unknown material is submerged in a fluid with an index of refraction of 1.33. If a ray of light is incident on the block at 45-degrees and the angle of refraction is 30-degrees. What is the index of the unknown material?
March 6, 2013

math
carl has a box with a length width and height of 12 inches. she needs a box that is 4 inches longer, not as high, yet still has exactly the same width and volume. what are the new dimensions? which box requires more material to construct? PLEASE HELP ME!! :(
February 20, 2013

Physics
What is the electrostatic force between a +1x10^-6C group of charges and another -2x10^-6 C group of charges located 0.3 m apart?
February 12, 2013

Physics
What is the electrostatic force between two ballons, each having 0.000005 C of charge, when they are 0.5 m apart?
February 12, 2013

Science
Laith notices that the air in his science classroom is much warmer than the air in his math classroom. Which statement describes how the air particles are different in his colder math classroom? A. They move faster on average B. They are vibrating C. They have less average ...
February 5, 2013

History
One major concern people had was that --------- were controlling politics at the expenseof the public good. Fill in the blank with one of these terms: Labor unions, Grover Cleveland, Chester Arthur, wealthy men, or James Garfield. I think that it is either Labor Unions or ...
January 21, 2013

History
thanks!
January 21, 2013

History
Is it Patronage?
January 21, 2013

History
which term suits this sentence: --------- often led to corruption, as some officeholders helped themselves to public money. Fill in the blank with one of these terms: labor unions, Grover Cleveland, Patronage, Chester Arthur, wealthy men, or James Garfield
January 21, 2013

Statistics
MBA_GPA BS GPA 2.82 3.05 3.49 3.45 3.28 3.5 3.25 3.55 3.26 3.3 2.87 3.05 3.16 3.35 3.4 3.35 2.84 3.05 3.72 3.7 3.22 3.5 3.44 3.55 3.65 3.9 3.02 3.3 3.03 3.25 3.8 3.8 3.23 3.5 3.26 3.5 3.53 3.75 3.75 3.9 3.15 3.2 3.66 3.75 3.36 3.45 3.79 3.85 2.85 3.05 3.74 3.9 3.23 3.25 3.52 3...
December 29, 2012

statistics
Can a student keep up their grade performance at the next level? Is a strong GPA at the Bachelors level a good predictor of a strong GPA at the Masters level, or are GPAs naturally going to decline since graduate school is tougher, or will GPAs automatically be higher in ...
December 29, 2012

physics-mechanics
A 1.0 kg mass weighs 9.8 N on Earth's surface, and the radius of Earth is roughly 6.4 x 10^6 m. Calculate the average density of Earth
December 27, 2012

Physics-mechanics
Find the speed and period of a satellite that orbits Mars 175 km above it's surface. (The average radius of Mars is 3.40 x 10^6; and it's mass is 6.42 x 10^23. Use all necessary formulas and show all clear-working, to enable me understand how you arrived at your answer.
December 27, 2012

Physics-mechanics
Find the speed and period of a satellite that orbits Mars 175 km above it's surface. (The average radius of Mars is 3.40 x 10^6; and it's mass is 6.42 x 10^23. Use all necessary formulas and show all clear-working, to enable me understand how you arrived at your answer.
December 27, 2012

Physics-mechanics
A satellite is placed in orbit, with a radius that is half the radius of the Moon's orbit. Find the period of the satellite in units of the period of the Moon. (sketch and analyze the situation, show all working so I can understand how you arrived at your answer).
December 27, 2012

Physics-mechanics
A satellite is placed in orbit, with a radius that is half the radius of the Moon's orbit. Find the period of the satellite in units of the period of the Moon. (sketch and analyze the situation, show all working so I can understand how you arrived at your answer).
December 27, 2012

Physics-mechanics
Two spheres are placed so that their centers are 2.6 m apart. The force between the two spheres is 2.75 x 10^-12 N. What is the mass of each sphere if one sphere is twice the mass of the other sphere?(please use all the correct formula, and show all working because I want to ...
December 27, 2012

Physics-mechanics
A 1.0 kg mass weighs 9.8 N on Earth's surface, and the radius of the Earth is roughly 6.4 x 10^6 m. Calculate the average density of Earth. (Show how you would calculate for density; don't just give the answer because L wan't to understand how you arrived at your ...
December 27, 2012

ACC/490
I need a summary of mt hood furniture pps sampling problem
December 26, 2012

Physics
A 1.0kg mass weighs 9.8 Newton on earth's surface, and the radius of Earth is roughly 6.4 x 10 to the power of 6. The mass of the earth is 6.02 x 10 to the power of 24. Calculate the average density of Earth?
December 24, 2012

Physics-mechanics
Two spheres are placed so that their centers are 2.6m apart. the force bvetween the two spheres is 2.75 x 10 to the power of negative 12 Newton.What is the mass of each sphere if one sphere is twice the mass of the other sphere?
December 24, 2012

Science
Does the weight on a Bridge affect the amount of shaking it endures during an earthquake?
December 13, 2012

Statistics
assume that adults have IQ scores that are normally distributed with a mean of 105 and a standard deviation of 15 find the probability that a randomly selected adult has an IQ between 89 and 121 ?
December 12, 2012

P Chem
5. The Li atom has three electrons. Measured values of the first and second ionization potentials are 5.3917 eV and 75.6400 eV, respectively. (i) Calculate the exactly correct value of the third ionization potential. Hint: What kind of species is Li+2? Give the result in ...
November 29, 2012

Physics
Tigger jumps into the sandpit. As this 13 kg animal jumps up, his initial velocity is 6 m/s with an angle of 26 degrees. As Tigger lands into the sandpit, how much work is done by the sand to stop him? Answer in units of Joules
November 28, 2012

physics
A puck of mass 4 kg is attached to a spring of force constant 100 N/m and natural length 0.07 meters. The other end of the spring is attached to a fixed pivot. The puck is set into circular motion so that the spring is stretched 0.03 meters from its natural length as the puck ...
November 26, 2012

English
What other word can i use in place of By? By its excellent magic, the orange gives you vitamin c
November 20, 2012

Chemistry
The molar enthalpy of vaporization for water is 40.79 kJ/mol. Express this enthalpy of vaporization in joules per gram.
November 20, 2012

Art
How can I describe a ceramics art piece? Is there certain words i should use?
November 14, 2012

math
write an equation in standard form with integer coefficients for the line with slope 10/19 going through the point (-4,-3)
November 5, 2012

algebra
Thank you
November 4, 2012

algebra
When an automobile accelerates, the power, P, needed to overcome air resistance varies directly with a power of the speed, v P=kv^n Use data to find the scalling exponent and the constant of variation v 10 20 30 40 p 355 2840 9585 22,720
November 4, 2012

physics
A student has just started pulling hard enough for a crate to start accelerating into motion. At that particular instant, what is the net force on the crate if the force of friction has magnitude 200 N and the applied force is 225 N?
October 8, 2012

physics
A crate with a mass of 50 kg has a coefficient of static friction with the floor of 0.8 and a coefficient of kinetic friction of 0.25. If it is pushed with a force of 425 N, how long will it take to move it across a 65 meter horizontal floor?
September 30, 2012

Physics
A skier with a mass of 66.6 kg starts from rest and skis down an icy (frictionless) slope that has a length of 58.4 m at an angle of 29.8° with respect to the horizontal. At the bottom of the slope, the path levels out and becomes horizontal, the snow becomes less icy, and...
September 27, 2012

physics
Luke stands on a scale in an elevator which has a constant acceleration upward. The scale reads 0.964 kN. When Luke picks up a box of mass 18.2 kg, the scale reads 1.202 kN. (The acceleration remains the same.) Calculate the acceleration of the elevator (enter first). Is it up...
September 25, 2012

math
if you have a cylinder is that is 3 1/2 in. diameter and 3 in. tall what is the total cubic inches
September 21, 2012

Chemistry
The radius of a chromium atom is 125 pm. How many chromium atoms would have to be laid side by side to span a distance of 4.14 mm?
September 17, 2012

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