Friday
July 25, 2014

Posts by Lisa


Total # Posts: 2,967

CHEMISTRYY!
Determine if HNO3 can dissolve in the following metal: 1) Write a balanced chemical reaction showing how the 2.09g Cu dissolves in HNO3. I had put down: Cu(s) + 4HNO3(aq) ——> Cu(NO3)2(aq) + 2NO2(g) + 2H2O(l) but it's wrong. 2) Determine the minimum volume of 6...

math
A family refers to a group of two or more people related by birth, marriage, or adoption who reside together. In 2000, in Country A, the average family net worth was $230,000, and there were about 7.2*10 to the seventh power families. Calculate the total of family net worth in...

Math
Seattle Chocolates for the year ended December 31, 2002: The following are selected items from the accounting records of Seattle Chocolates for the year ended December 31, 2002: Note payable to northwest Bank $500,000 Income taxes payable 40,000 Accrued expenses and payroll ta...

Math
Harper Co. has outstanding $100 million of 5% bonds, due in 7 years, and callable at 102. The bonds were issued at par and are selling today at a market price of 92. If Harper Co. retires $10 million of these bonds by purchasing them from bondholders at current market price, t...

math
The Thompson Company uses standard costing and has established the following direct material and direct labor standards for each unit of Lept. Direct materials: 2 gallons at $4 per gallon Direct labor: 0.5 hours at $8 per hour During September, the company made 6,000 Lepts and...

chem
consider the system I2(g)+262 KJ ¡ê 2 I (g) at 1000¡ÆC. In which direction, if any, will the reaction proceed if gaseous iodine atoms are added, the system is compressed, the temperature is decreased, a catalyst is introduced, and gaseous idodine atoms ...

Math
Suppose you had d dollies in your bank account.you spent $12 but have at least $51 left.how much money did you have initially?write and solve an inequality that represents this situation.

math
A professor grades students on three tests, four quizzes, and a final examination. Each test counts as two quizzes and the final examination counts as two tests. Sara has test scores of 60, 80, and 89. Sara's quiz scores are 85, 94, 83, and 84. Her final examination score...

Counseling
are there in big differences in the ACA and NCDA codes of ethics?

Math
Im helping my son to find the area of a rectangle that is 7 3/8 inches and 4 inches the height. I need to know how to convert the fraction into a whole number.

math
How do you evaluate the following: Bill has two times as many coins as Tina.

calculus
I have spilled 200cm^3 of vegetable oil on my kitchen floor. The resulting oil slick can be modeled as a cylinder with a very small height; the height is decreasing at a rate of 1/1000πcm/sec and the radius is currently 50cm. How quickly is the radius of the oil slick inc...

calculus
Consider the interval I=[6,7.6]. Break I into four subintervals of length 0.4, namely the four subintervals [6,6.4],[6.4,6.8],[6.8,7.2],[7.2,7.6]. Suppose that f(6)=19, f'(6)=0, f'(6.4)=−0.5, f'(6.8)=−0.1, and f'(7.2)=−0.1. What is the approxi...

Chemistry
For calculating the concentration of a metal Ion in Equilibrium with a complex ion...how do I get the right hand side of this equation to equal 5.9 E -8? x(0.98 + 2x)2 _____________ = 1.7 E 7 (0.010-x) then, x(0.98)2 ________ = 5.9 E -8 0.010 I understand that you cancel out t...

calculus
Consider the interval I=[6,7.6]. Break I into four subintervals of length 0.4, namely the four subintervals [6,6.4],[6.4,6.8],[6.8,7.2],[7.2,7.6]. Suppose that f(6)=19, f'(6)=0, f'(6.4)=−0.5, f'(6.8)=−0.1, and f'(7.2)=−0.1. What is the approxi...

Language Arts
Directions: Read the poem and answer the questions that follow. Fossil Flitting, flickering, flashing black, white, and a note of red passes beneath trees that were already old at the end of the Civil War. The lovely departed species announces its fearless refusal to cease to ...

physics
a kids marble rolls of a 63 cm tall table a a speed of 30 cm/s. How far from the based of the table will the ball land?

math
its -2x+9

math
find the inverse of each function. is the inverse a function? 1) f(x)=-2x+9 2) f(x) x^2+2

Maximum Area-Calculus-Edit
THANK YOU SO MUCH! I got 250 for each dimension :)

Maximum Area-Calculus-Edit
We have 900 ft of fencing and we want to construct a back yard. If we are using the building as part of the barrier for the yard what are the dimensions that allow maximum area? I am not even sure how to start though I know I am supposed to calculate the derivative of the setu...

Maximum Area
As the text drawing did not come out clear I hope this may clarify what I meant. imgur /F5NJVqp

Maximum Area
I do not think I made it clear sir. The part where I was stuck was where 100 ft. of the building is covered by the side of the yard. ___________________ | yard | | | -------------------- } building { ------------ the building length is 100 feet Sorry for any confusion this cau...

Maximum Area
We have 900 ft of fencing and we want to construct a back yard. If we are using the building as part of the barrier for the yard what are the dimensions that allow maximum area? I am not even sure how to start though I know I am supposed to calculate the derivative of the setu...

Concavity-Calculus
Determine the concavity for f(x)= 4/x^2-1 I took the second derivative and solved for zeros. I got x=-1 and x=1. However when plugged into the orig. equation this results in 4/0 (undefined). Does this mean there is no concavity?

Calculus Derivative- Taylor Series?
*look

Calculus Derivative- Taylor Series?
Yes I did get those as my derivatives. Thank you very much for your help Reiny. I did not know which patterns to look for. I think that it would be (-1)^n for the alternating neg. and pos.? Then n! for the factorial? And lastly x^ -(n+1) for the power of x in the denominator? ...

Calculus Derivative- Taylor Series?
let f(x)= x/x-1 find f'(x) f ''(x) and a formula for f ^ (n) * x. I found the first and second derivatives but do not know how to make a general equation for this. I have not learnt the Taylor or Maclaurin Series either. Thank you.

math
describe the transformation of y=log (x-4) -1 2 from the graph of y=log X. 2 then state the asymptote and the domain range.

Chemistry
How will the addition of sodium acetate to an acetic acid solution affect the pH? A. solution becomes hotter B. It will lower the pH C. It will raise the pH D. pH will not change E. pH cannot be measured I selected answer D and got it wrong. I don't understand why...

math
8^x+1=3

math
log(3x+1)=2

math
write a polynomial function in standard form with the given zeros. 1-2i,2

math
solve each equation 1) log5-log2x=1 2) 2log(x+1)=5

math
describe the transformation of y=8^x+2 from the graph of y=8^x then state the asymptote and domain and range.

calculus
Let f(x)=e^(x2). By the Mean Value Theorem, there exists a point c such that f′(c)=f(6)−f(4)6−4 with c between 4 and 6. Approximate c to within two decimal places; we're asking you to approximate c, because you can't "solve" for c.

calculus
its cubed

calculus
Use a linear approximation of f(x)=^3√x at x=8 to approximate ^3√7. Express your answer as an exact fraction.

math
Einsteins famous formula E=mc^2 relates energy E,mass m and the speed of light c. solve the formula for c.

calculus
Use the Euler Method with a step size of 0.2 to estimate f(3) where f′(x)=2x−7 and f(2)=4. Your answer should be correct to two decimal places.

calculus
Use a linear approximation of f(x)=log(x) at x=1 to approximate log(3/4). Express your answer as an exact fraction; remember that log denotes the natural log.

math
At a football game, a vender sold a combined total 210 of sodas and hot dogs. The number of sodas sold was 44 more than the number of hot dogs sold. Find the number of sodas sold and the number of hot dogs sold.

Chemistry
At a certain temperature, the equilibrium constant, Kc, for this reaction is 53.3. H2(g)+I2(g) <--> 2HI(g) Kc= 53.3 At this temperature, 0.300 mol of H2 and 0.300 mol of I2 were placed in a 1.00-L container to react. What concentration of HI is present at equilibrium? HI...

physics
A car with a weight of 5000.0 N is accelerated across a level surface at 2.5 m/s^2. What is the net force acts on the wagon? (g= 9.81 m/s^2)

College Mathematics
write the statement in symbolic form. Let p: the temperature is 90 degrees Let q: The air conditioner is working r: the apartment is hot. If the apartment is hot and the air conditioning is working, then the tempurature is 90 degrees.

Chemistry 101
2HCl(aq)+K2SO3(aq)➡️2KCl(aq)+SO2(g)+H2O(l) Is is a gas evolution reaction:)

College Mathematics
write the statement in symbolic form. Let p: The Temperatue is 90 degrees Let q: The air conditioner is working Let r: If the apartment is hot and the air conditioner is working, then the temperature is 90 degrees.

College Mathematics
write the statement in symbolic form. Let p: The Temperatue is 90 degrees Let q: The air conditioner is working Let r: If the apartment is hot and the air conditioner is working, then the temperature is 90 degrees.

College Mathematics
Construct a truth table for the statement (p<--->q)--->p

math
hi i wanted to know what is 1.8387 rounded three decimal places please im stuck

calculus
A cylindrical container is to hold 20π cm^3. The top and bottom are made of a material that costs $0.40 per cm^2. The material for the curved side costs $0.32 per cm^2. Find the height in centimeters of the most economical container.

calculus
Suppose you have 400 meters of fencing and you wish to enclose a rectangular space with two parallel partitions: What is the maximum total area of the enclosed space, in square meters?

math
Miss Ramirez has invested $6,000 at 5%. How much additional money must she invest at 8% so that her annual income from the two investments will be 6% of the total amount invested?

AP Chem
Is that because it's a solid and not a gas?

AP Chem
For the following equilibrium system, which of the following changes will form more CaCO3? CO2(g) + Ca(OH)2(s) <--> CaCO3(s) + H2O(l) deltaH(rxn) = -113 kJ My choices are: a) Decrease temperature at a constant pressure (no phase change) B) Increase volume at a constant t...

6th grade math
n/4+32=72 (sub. 32) n/4=40 (multiply by 4) n=160

6th grade math
Multiply both sides by 4

Chem Help!!!!
I balanced the equation and got 2Cr+3O2->2CrO3.. but I was informed that this is the incorrect answer

Chem Help!!!!
In an experiment, 0.771g Cr(s)reacts completely with 0.712g O2 to form a single solid compound. Write a balanced equation

Chemistry Help!!!!!
How many milliliters of 0.635M K2CrO4 are needed to precipitate all the silver in 410mL of 0.158M AgNO3 as AgCrO4 ?

calculus
At noon, you and I start at the same place, and then you head east at a speed of 5 kilometers per hour, and I head north at a speed of 4 kilometers per hour. After two hours, how fast are we moving apart, in kilometers per hour?

Microeconomics
Thanks, Anonymous...Although I understand the concept I need to actually see the formula. I am a visual kindda person.

Microeconomics
If fixed cost is $8,000, variable cost is $5,000 at an output of 2 and $9,000 at an output of 3, how much is marginal cost at an output of 3? Can someone show me how to do the formula step by step?

reading
Fill in the blank 1-2. Although Jenny chose the songs from her __ that she knew best, she wasn't complacent about being prepared. Afraid she would __ the night of the concert, she practiced the songs over and over. 3-4. The __ of the lecture was that although the United St...

Intermediate reading
Is this a correct sentence? The gist of the lecture was that although the United States encourages free trade, some other countries falter it

Math help
the answer is 40 years. Hope this helps

Reading
1. repertoire 2. hamper 3. gist 4. falter 5. variable 6. conducive 7. frenzy 8. paradox 9. bizarre 10. flaunt

Reading
Can you help me with the following sentences? 1-2. Although Jenny chose the songs from her __ that she knew best, she wasn't complacent about being prepared. Afraid she would __ the night of the concert, she practiced the song over and over. 3-4. The __ of the lecture was ...

math
Thank you c:

math
oh because i thought it was a negative and a positive so they cancel out but its 7x^2-6x-6? or...?

math
so would it be 7x^2-6??

math
what is the sum of (x^2-3x+2) and (5x^2-3x-8)? how would you solve this???? please help

Chemistry
Thank you

Chemistry
A thoroughly dried 1.281g sample of Na2SO4 is exposed to the atmosphere and found to gain 0.383g in mass. What is the percent, by mass, of Na2SO4*10 H2O in the resulting mixture of anhydrous Na2SO4 and the decahydrate

Pre Cal
Sec^2 2u-1/Sec^2 2u = Sin^2 2u

MaTH
the perpendicular line is -2 the parallel line is 3/2

Chemistry
A 62g piece of ice at 0 degrees celcius is added to a sample of water at 9 degrees celcius. All of the ice melts and the temperature of the water decreases to 0 degrees celcius. How many grams of water were in the sample

English
Are there cultures that should not be promoted in the early childhood education setting? Why or why not? Support your position.

algebra
Can you please help me with this problem? -7x-4x-5=9x

math
75

math
if the ratio of boys to girls is 3/4 and there are 49 students how many boys are there?

Reading
ok thanks

Reading
Is the correct answers 4. empathy 6. complacent 9. diligent 10. transcend

Reading
Is this the correct word for each sentence 1-2. Lynn begged the bank to __ the overdraft charge of thirty dollars, telling them that it would entirely __ her savings. 3-4. In high school, Julio was voted "Most Likely to Become a Psychologist." It was the __ of his cl...

Chem Help!!!!!
Ha! I just saw your comment... I am indeed are you in his class or you've taken him before, Donovan?

Chem Help!!!!!
The angle iron pictured here is made of steel with a density of 7.78g/cm^3. (Figure 1) measurements are: 12.78cm 10.26cm 1.35cm 2.75cm 1.35cm

College Physics 2
A parallel-plate air capacitor is made from two plates 0.250 m square, spaced 0.70 cm apart. It is connected to a 140 V battery. a) What is the capacitance? C = 7.90×10−11 F b) What is the charge on each plate? Enter your answer as an absolute value of charge. Q = ...

accounting
Suppose that two years after the bonds were issued, the required interest rate fell to 7 percent. What would be the bonds’ value?

business
In portfolio analysis, the goal when purchasing leverage items is

algebra
8/3fg^2

Chemistry
I read this question wrong and posted it wrong...it should be which is incorrect? If this is the case shouldn't C be the correct one?

Chemistry
Consider the following equilibrium: NH4Cl(s)--->NH3(g) + HCl(g) Suppose a vessel containing NH4Cl(s), NH3(g) and HCl(g) is at equilibrium. If the volume of vessel is instantaneously doubled while keeping the temp constant when a new equilibrium is reacted, which of the foll...

Math
x+ .76x =1.76x Or 1x+.76x=1.76x

Math
.76(.0200-x)=x .0152-.76x=x +.76x +.76x (x add to .76x = 1.76x) .0152=1.76x (divide by 1.76 to solve for x)

math
6x=-36 /6 /6 x =-6

CHEM
How many grams of magnesium chloride are needed to prepare 100ml of a 0.325 M MgCl2 solution?

CHEM
What is the molarity of potassium iodide solution prepared by adding 5.810g of KI to sufficient water to make a final solution volume of 250.0mL?

CHEM
What is the molarity of a calcium sulfate solution prepared by adding 27.89g of CaSo4 to sufficient water to make a final solution volume of 1.00L?

CHEM
How many grams of sodium chloride are required to prepare 1.00 liter of a 1.00M NaCl solution?

math
9*12=108 W+(w+44)=108 2w=64 W=32. -white roses

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