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October 23, 2014

Posts by Amber


Total # Posts: 1,154

college algebra
Find the maximum value of 5x + 7 – x2 on the horizontal span of 0 to 5. (Enter the maximum value of the expression, not the value of x at that point.)
February 27, 2011

college algebra
If an average-size man with a parachute jumps from an airplane, he will fall 12.5(0.2t - 1) + 19t feet in t seconds. How long will it take him to fall 134 feet?
February 27, 2011

ALGEBRA 1
Cindy will require $15,000 in 2 years to return to college to get an MBA degree. How much money should she ask her parents for now so that, if she invests it at 12% compounded continuously, she will have enough for school?
February 27, 2011

algebra 1 sequences
Year 2003 2004 2005 2006 Populatation 22.12 22.49 22.86 23.41 A. divide the population for each year by the population in the preceeding year. Round to the two decimal places and show the Texas population increase that is approximately geometric. 1.01 B. Write the general term...
February 26, 2011

Algebra
Jennifer takes a job with a starting salary of $39,000 for the first year with an annual increase of 5% beginning in the second year. What is Jennifer's salary, to the nearest dollar
February 26, 2011

chemistry
Describe how to make 20 mL of a 6.0 % solution from a stock solution with a concentration of 10 %.
February 22, 2011

Algebra
Find the accumulated value of an investment of $5000 at 5% compounded monthly for 8 years.
February 22, 2011

algebra
If p(t) is the profit (in dollars) that I expect my business to earn t years after opening, use functional notation to express my expected profit after 4 years and 6 months.
February 19, 2011

Algerbra 2
I am doing a worksheet for my alg. 2 class and in the worksheet it says: 'Simplify the expression. Assusme all variable are positive.' the problem is perentheses, square root of six times the power of 3 square root of six perentheses power of six!
February 15, 2011

STATISTICS
Private college and universities rely on money contributed by individuals and corporations for their operating expenses. Much of this money is put into a fund called an endowment, and the college spends only the interest earned by the fund. A recent survey of eight private ...
February 15, 2011

american literature
list three rhetorical devices that patrick Henry uses in his "speech in the virginia convention." Give an example from the speech of each rhetorical device.
February 10, 2011

literature
thanks for the help
February 10, 2011

PHY
Ok...I know this is a stupid question, but I need help! Ok, here it is: An object that has more electrons than it does protons will be _____ a CL^-1 ion. repelled by attracted to unaffected by I know that opposites attract and that same repells, but I am doubting myself with ...
February 9, 2011

Physics
I have been working on my Phys homework and came accross this question that is giving me some trouble: The charge (coul) on an object increases according to (q) = (2 coul)e[(0.050/sec)(t)], where t is in seconds. At how many seconds is the object deficient 1.56 x 10^20 ...
February 5, 2011

Random Question
Ok thank you.
February 5, 2011

Random Question
In the movie "Hauting Sarah" what is the twin sister trying to accomplish??? bringing her son back through her sister?
February 5, 2011

Physics
A certain "brand-new" (never-used) 9.0 volt cell contains 40mC of charge. The Electric energy "stored" in the cell amounts to about (___) joules. 0.0 0.06 37.5 .36 60x10^-4 I'm not too sure how to figure this problem out. I initially thought 40/9, but ...
February 5, 2011

math
Angelo is paid double time for each hour he works over 40 hours in a week. Last week he worked 46 hours and earned $520. What is his normal hourly rate?
February 4, 2011

Calculus I
evaluate and justify each step lim((xe^x)/tan x) as x approaches 1. i just need the over all jest of the problem because i don't know what to do to get rid of the 0 in the denominator. Thanks.
January 31, 2011

physics
a student does 314 J of work in moving a desk 2.1 m. What was the magnitude of the applied horizontal force?
January 27, 2011

Science Half Lives
I don't know the answer to your question, but can some one help me with mine? Question: After six half-lives, what percentage of a radioactive sample will remain? Please help me!, Thank you.
January 25, 2011

CP Geometry
Working with square roots (s.r.) and need help. - s.r. 60/5 This is negative s.r. 60/5
January 25, 2011

CP Geometry
it was a riddle. the answer was a jab well done.
January 24, 2011

CP Geometry
What do you call it when the nurse gives you a shot you hardly feel? s.r. = square root s.r.5 * s.r. 15. my choices are 5s.r.3, 20s.r.5, 4s.r.10, 3s.r.2, 3s.r.10, 2s.r.6, 9, 5s.r.6, 10s.r.3.
January 24, 2011

Chemistry
If the equilibirium reaction is 2 03(g) <--> 3 O2 9(g) is first order with respect to ozone, what type of plot( meaning what is plotted on the y axis vs what is plotted on the x-axis) will yield a straight line? what will the slope of the line represent? PLEASE help im ...
January 23, 2011

Chemistry
Sorry I typed it wrong i meant IF the rate of consumption of N2O4 (below) is .0221 what is the rate of production of NO2?
January 23, 2011

Chemistry
IF the rate of consumption of N2)4 (below) is .0221, what is the rate of production of NO2? N2O4(g)<->2NO2(g) Please help and explain. BC i have to actually understand how to do the problem. Thanks
January 23, 2011

Comm215
In this problem: Sally told Janice that she made the honor role. __ Pronoun shift in number __ Pronoun shift in person __ Ambiguous reference __ No error What does ambiguous reference mean?
January 17, 2011

math
If you borrow $5,000 at an APR of 5%. Find the interest, I after 36 months
January 13, 2011

Math
5% interest rate for 5,000,00 how much after 4 years
January 13, 2011

physics
A 10kg block is sliding at 10m/s along a frictionless track which suddenly curves straight up. how high will the block rise
January 12, 2011

7th Grade Math-Exponents
I dont understand this at all! Please help! Find the units digit for 7^197 without using a calculator. Explain how you found your answer.
December 16, 2010

Math-7th grade
that makes sense...thanks!
December 16, 2010

Math-7th grade
1.75 Thank you, But what about for day one? If it's 1.75 per day, how is the first day charge 3.75?
December 16, 2010

Math-7th grade
Im having trouble solving the amount per day... The table below shows the relationship between d, the number of days a DVD is returned late to a video rental store, and f, the amount of the late fee. Write an algebraic expression that describes this relationship? Prove your ...
December 16, 2010

7th Grade Math
I believe 21 2 doubled is 4 4 + 5 is 9 a quarter of 9 is 3 3+9 is 12 12 plus two is fourteen and half of fourteen is 7 7 plus 14 is 21.
December 14, 2010

7th grade Math
Thank you so much! I didnt understand it at all!
December 14, 2010

7th grade Math
A space probe is 7.62 x 10 to the 7th power kilometers from the surface of the planet Mars. If the space probe is traveling towards mars at a arate of 127 meters per second, how many hours will it take the probe to reach the surface of the plant? Round to the nearest hour. ...
December 14, 2010

7th grade math
Its a math homework assignment
December 13, 2010

7th grade
A space probe is 7.62 x 10 to the 7th power kilometers from the surface of the planet Mars. If the space probe is traveling towards mars at a arate of 127 meters per second, how many hours will it take the probe to reach the surface of the plant? Round to the nearest hour. Help!?
December 13, 2010

Math
jk sorry that was my sister she wont do it agin
December 12, 2010

math
the rectangle shown above has a total of 2808 square feet. the length is 78 feet. what is the width
December 9, 2010

7th grade
2(2.5b-9) + 6b= -7 5B -18 +6B= -7 Add the B's 11B -18=-7 +18 +18 11B= -11 Divide by 11 each side to get B=-1
December 8, 2010

MATH
Carmen deposits into an account that pays simple interest at a rate of per year. How much interest will she be paid in the first years?
December 7, 2010

Math
19+n u#1=19+1 u#1=20 u#50=19+50 u#1=69 50(20+69)/2
December 5, 2010

physics
when a force of 80n acts on a 500g hockie puck, at what rate will the hockie puck accelerate?
December 3, 2010

physics help me please!
A certain wave is incident on an interface at an angle of 40 deg. The wave emerges into the other material at an angle of 30 deg. Crossing the interface, the wave: a. increased speed b. reduced speed c. maintained constant d. more info is needed I think reduces its speed, but ...
November 30, 2010

algebra
I have this problem too! I can't figure it out either. lol
November 28, 2010

Algebra
find the unit rate for number of parts manufactured per hour if 1630 parts are made in 6 hours. round to the nearest integer. SHOW ALL WORK.
November 28, 2010

Physics
A plank 2.00 cm thick and 15.0 cm wide is firmly attached to the railing of a ship by clamps so that the rest of the board extends 2.00 m horizontally over the sea below. A man of mass 80.0 kg is forced to stand on the very end. IF the end of the board drops by 5.00cm because ...
November 17, 2010

Physics
A plank 2.00 cm thick and 15.0 cm wide is firmly attached to the railing of a ship by clamps so that the rest of the board extends 2.00 m horizontally over the sea below. A man of mass 80.0 kg is forced to stand on the very end. IF the end of the board drops by 5.00cm because ...
November 17, 2010

Physics-Please Help Me!!
5.Assuming the surface tension of water is .073 N/m, what is the force required to overcome the surface tension?
November 15, 2010

physics
5.Assuming the surface tension of water is .073 N/m, what is the force required to overcome the surface tension?
November 15, 2010

Physics
5.Assuming the surface tension of water is .073 N/m, what is the force required to overcome the surface tension?
November 15, 2010

Physics
A flat slab of styrofoam, with a density of 32 kg/m^3, floats on a lake. What is the minimum volume the slab must have so that a 42 kg boy can sit on the slab without it sinking?
November 15, 2010

Chemistry
Use the given data and calculate the enthalpy change for the following: a) B2O3(s)+3COCL2(g)--->2BCL3(g)+3CO2(g) b)Hg(l) +2Ag+(aq)--->Hg2+(aq)+2Ag(s) compound: B2O3(s) COCL2(g) BCL3(g) CO2(g) Ag+ (aq) Hg2+ (aq) Delta H (standard circle)f kj/mol -1272.8 -218.8 -403.8 -393...
November 13, 2010

physics
What approximate change in decibles does an observer experience form a sound source if the oberver moves to a new location that is 67% as far from the source?
November 12, 2010

physics
A series of waves traveling at 200 m/sec are being generated by a 100 Hz source. A point at the very top of the crest of a certain wave is ____ meters from a corresponding point 3 crests away.
November 12, 2010

physics
A 2000 lb box is being held at rest submerged in water. The box is displacing 2500 lbs of water. When the box is released from its submerged position, the box will a. sink b. rise to the surface and float c. remain where it is d. result unknown
November 12, 2010

physics
A wave that is travelling due west causes particles of the conducting material to ibrate "north/south". This wave is best described as: a. longitudinal b. transverse c. translute d. permute
November 12, 2010

physics
You should expect concrete to have an elastic constant that is _____ than wood. a. larger than b. smaller than c. equal to
November 12, 2010

Chemistry
Calculate the density of F2 gas at 27 degree Celsius and 1.00 atm pressure?
November 9, 2010

Chemistry
How many calories would be needed to convert 8.0g of ice at 0C to steam at 100C?
November 9, 2010

pscyhology
everything is right except 1)a 4)a 5)a 14)a 19)d just took test
November 8, 2010

Chemistry
At 10 degree Celsius a sample of carbon dioxide gas has a volume of 25.5 mL under pressure of 758 mmHg. What would the volume of the CO2 sample be at STP?
November 5, 2010

Chemistry
Suppose a mixture of hydrogen and oxygen gas is exerting a pressure of 1.60 atm. If the partial pressure of oxygen in the mixture is 304 mmHg atm, what is the partial pressure of the hydrogen?
November 5, 2010

Chemistry
A rigid container of O2 has a pressure of 3.5 atm at a temperature of 713 K. What temperature would be needed to achieve a pressure of 6.0 atm?
November 5, 2010

PHYSICS
NEED HELP ON THE ANSWER OF THIS PROBLEM THE EFFICIENCY OF THE PULLEY DECREASES WITH A COEFFICIENT OF FRICTION OF 2.0 THE EFFICIENCY OF THE PULLEY IS 60% WHAT WOULD YOU EXPECT THE EFFICIENCY TO BE IF THE COEFFICIENT OF FRICTION INCREASED TO 0.3
November 1, 2010

manaegerial economics
iven a firm’s demand function, P = 24 - 0.5Q and the average cost function, AC = Q2 – 8Q + 36 + 3/Q, calculate the level of output Q which a) maximizes total revenue b) maximizes pr
October 30, 2010

5th grade
2 22 12 132 122 1342? What is next and what is the pattern
October 29, 2010

Chemistry
6M NaOH**
October 28, 2010

Chemistry
Calculate the approximate concentration of 41 mL of 6 M diluted to about 0.95 L of water?
October 28, 2010

chemistry
Should the answer be in molarity, then?
October 28, 2010

chemistry
What is the concentration of 10g of NaOH dizzolved in 0.95 L of water?
October 28, 2010

science
What mass of carbon dioxide is produced from the complete combustion of 5.20×10−3 of methane?
October 28, 2010

us history
False
October 24, 2010

chemistry
what is the difference between specific heat and heat capcacity?
October 24, 2010

CHEMISTRY
1.0 g of fat has 9kcal/g, while 1.0 g of carbohydrates and protein have 4kcal/g each, determine the total amount of Calories (kcal) in 1 serving if that serving contains 20.0 g of carbohydrates, 20.0 g of protein and 15.0 g of fat
October 23, 2010

chem
help with this problem pease Metal Specific Heat (J/g-C) Al (s) 0.900 Au(s) 0.129 Cu(s) 0.385 Fe(s) 0.444 Hg(l) 0.139 H2O(l) 4.184 C2H5OH(l) 2.46 A piece of metal at a temp of 101.0oC and a mass of 86.0 g is dropped into a beaker of water containing 75.0 ml at a temp. of 27....
October 23, 2010

ap chem
how do you find mole fraction?
October 21, 2010

AP Chem
Calculate the average kenetic energy of the CH4 molecules in a sample of CH4 gas at 273K and at 546K. So, should I have two answers or one? Super confused
October 21, 2010

Advice
Many things can contribute to moving... such as better pay, family issues, maybe going off to get more education. The possibilities are endless.
October 21, 2010

managerial economics
A) Total revenue is the product of the quantity sold and the price at which they were sold. (total revenue) = Q*P = Q*(24 - .5Q) = -.5Q^2 + 24Q This quadratic function will have a maximum at Q = -24/(2*(-.5)) = 24 Total revenue will be maximized when Q = 24. B) The profit on ...
October 19, 2010

Chemistry
What is the empirical formula for Dichloroethane?
October 18, 2010

chemistry
At what temperature (C) will a gas sample occupy 6.1 L if it originally occupies 17.8 L at 27.1C? T1V1=T2V2 T1(6.1)=(17.8)(300.25) T1=876? Please check my answer
October 17, 2010

chemistry
At what temperature (C) will a gas sample occupy 6.1 L if it originally occupies 17.8 L at 27.1C? T1V1=T2V2 T1(6.1)=(17.8)(300.25) T1=876? Please check my answer
October 17, 2010

Chemistry
How many grams of KCl would be formed in the reaction of 3.000 g of K2CO3 and HCl?
October 17, 2010

Chemistry
How many milliliters of 6.0 M HCl would be needed if 3.000 g of K2CO3 were used in an experiment?
October 17, 2010

Chemistry
What is the balanced equation for the reaction of 3.000 g of K2CO3 and HCl?
October 17, 2010

English 2
Need help with the same questions
October 17, 2010

chemistry
What volume (in Liters) of oxygen must react to form 17.0L of carbon dioxide according to the following balanced equation: 2CO(g) + O2(g) --> 2CO2(g) is this correct C G02 2
October 16, 2010

chem
Lithium hydride reacts with water as follows. LiH(s) + H2O(l) -->LiOH(aq) + H2(g) During World War II, U.S. pilots carried LiH tablets. In the event of a crash landing at sea, the LiH would react with the seawater and fill their life belts and lifeboats with hydrogen gas. ...
October 16, 2010

chem
A 31.2 cm3 bubble of air at 1.4 atm pressure is subjected to a new pressure of 3.9 atm. What will be the new volume (cm3)? Assume constant temperature. THe answer I got was 11.2 cm3 is this correct
October 16, 2010

Chemisrty
Calculate the work done when 60.0 g of tin dissolves in excess acid at 1.00 atm and 20°C. Assume ideal gas behavior.
October 14, 2010

chemistry
how many moles of ions are released when 1.6 mol of ammonium phosphate is dissolved in water?
October 10, 2010

physics
Sorry for so many posts, but you would not use delta v/ delta t to find acceleration. correct? on the graph it shows that at 1.1 second the graph changes directions therefore the slope of the tangent line at that point is equal to zero. I plugged it into the formula you gave ...
October 10, 2010

physics
Oh okay, thank you. The only thing included was a graph giving the points t=0s, speed= 0cm per second; t= .5s, speed= 15cm per second; t=1.1s, speed =28cm per second; t=1.6s, speed=6cm per second.
October 10, 2010

physics
The figure below shows the speed of a person's body as he does a chin-up. Assume the motion is vertical and the mass of the person's body is 73.4 kg. Determine the force exerted by the chin-up bar on his body at the following times. t=0s, speed= 0cm per second; t= .5s...
October 10, 2010

physics
The next thing I tried was to solve for T from by fbd. I got T=m1g-m1a for the first mass, then T1-T2=-fk*m2g+m1a for the second, and T=m3g+m3a. I dont know if this is right or not. Since I am trying to find the acceleration of each mass can i set these equations equal to each...
October 9, 2010

physics
Im sorry, m1 is suspended by a pulley and string on the left side, m2 is on the table connected to the pulley by a string in the middle and m3 is suspended on the right side by a pulley and string which is also connected to m2. I am pretty sure I need to find an equation in ...
October 9, 2010

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