Posts by Annie

Total # Posts: 864

calc and Vectors
A wire 60 cm long is to be cut into two pieces. One of the pieces will be bent into the shape of a square and the other into the shape of an equilateral triangle. The wire is to be cut in order that the sum of the areas of the square and the triangle is to be a maximum. An ...

Calc and Vectors
The owner of an orange grove estimates that 150 orange trees per acre will each yield on average 800 oranges per year. For each additional tree planted per acre the number of oranges produced by each tree decreases by 10 per year. How many trees should be planted per acre in ...

Calculus and vectors
A cylindrical tank is to have a capacity of 1000 m³. It is to fit into a foundry that is 12 m wide with a height of 11 m. The base of the tank will cost half as much as the top. The metal for the side of the tank will cost four fifths as much as the top. An equation that ...

Math
Fencing costs 29$ per meter what is the cost of fencing a rectangular swimming pool if the fenced area is to be 16 m long 9 m wide.

geometry
what is the algebraic rule for x=4,y=1;x=6,y=1;x=8,y=2;x=10,y=2;x=12,y=3;x=14,y=3;x=16,y=4;x=18,y=4...

math
Sherry is playing the integer game and is given a chance to discard a set of matching cards. Sherry determines that if she discards one set of cards her score will increase by 12. If she discards another set, then her score will decrease by eight. If her matching cards make up...

us hist
c is correct

staistics, is it right?
Find the mean, the median, and the mode for the following data. 21 21 22 22 22 26 34 Mean 335.1 rounded to 335, median 22, mode is 22 could someone tell me if I got this right?

statistics
Find the mean, the median, and the mode for the following data. 21 21 22 22 22 26 34 Mean 335.1 rounded to 335, median 22, mode is 22

statistics
I have to find mean, median and mode did I do this right? 21,21,22,22,22,26,34

math geometry
how can i prove in geometry proofs that something is a midpoint of a line? thanks

english
not sure but prepositional phrase with a gerund?

english
__present participial phrase __nominative absolute __appositive __past participial phrase __prepositional phrase with a gerund

english
By serving as a popcorn vendor sorry

english
What grammatical structure is the italicized portion of the sentence? By serving as a popcorn vendor, Don saw many good games. appositive?

English
Select the correct noun clause in the sentence below. Then choose the function of the noun clause. The detective asked me if I had heard any strange noises the night before. Noun clause: if I had heard any strange noises the night before. function of clause: direct object

English
Thank you once again.

English
Which of the following sentences does not have a subordinate adjective clause? ___The poem, which Peg wrote for me, was good enough to print. _x_He made some statements, and they had no foundation of fact. ___Gerry won a swimming pool trophy of which he is very proud.

English
What is a subordinate clause?

English
Thanks again. (:

English
1.adjective 4.adjective 5.noun ?

English
Choose the function of the italicized infinitive phrase. 1.May I have permission to use the car tonight? 2.He went to Europe to study architecture. 3.I want to go with you to the store. 4.Can you give me a place to put my things? 5.To help you is my greatest desire. 6.Meredith...

English
thank you!!!!

English
So 5. Subject? 6.Predicate noun?

English
What is the gerund phrase and noun function of the gerund in these sentences: 1.Brett earns his income by repairing cars. 2.I enjoy playing the piano. 3.Her favorite pastime is entertaining friends. 4.She is successful in mimicking others' voices. 5.He must like studying ...

3rd grade Math
If Beth has 28 feet of trim to use as edging on a rectangular blanket, what is the length and width of two blanket sizes she could make?

science
Need help with those same questions.. please help!!

english
An occurrence at Owl Creek bridge compare and contrast to After Twenty Years

biology
Explain how new species can originate without geographical barriers.

Calculus
Find the volume of the solid obtained by rotating the region under the graph of the function f(x) = (2)/(x+1) about the x-axis over the interval [0,3]

Calculus
Find the area of the shaded region bounded by y=7x and y=x(sqrt(22^2-x^2))

Chemistry
Carbon tetrachloride has an enthalpy of vaporization of 29.82kj/mol. If CCl4 has a normal boiling point of 350k, what is its vapor pressure at 273k? (R=8.31 J/molK)

Chemistry
What is the vapor pressure of CH4 at 1 atm and 298k?

chemistry
What is the vapor pressure of helium at 1 atm and 298 k?

math
find the critical points of h(t) = (t^2-4)^(1/3)

math
calculate the general antiderivative of f(x) = -19x^4 - 15x^3 + (20/x)

Math
limit as x approaches 9 of (8/(sqrt(x)-3)) - (48)(x-9)

chemistry
A 8.90-L container holds a mixture of two gases at 45 C. The partial pressures of gas A and gas B, respectively, are .294 atm and .860 atm. If .100 mol of a third gas is added with no change in volume or temperature, what will the total pressure become?

chemistry
if the partial pressure of the diatomic gas is .300 atm, what is the total pressure? 6 blue dots 5 orange dots 3 green dots consisting of 2 dots each (diatomic gas)

chemistry
O2 effuses at a rate that is _____ times that of Xe under the same conditions. rate 02/rate x2 = ?

chemistry
delta h= -5113.3

chemistry
for a particular isomer C8H18, the following reaction produces 5113.3 kj of heat per mole of C8H18 consumed under standard conditions c8h18(g) + 25/2 O2 (g) ---> 8co2(g) + 9h2o(g) what is the standard enthalpy of formation of this isomer of c8h18? o2= 0 co2(g)= -393.5 h2o(g...

Chemistry
Which of the following substances have a standard heat of formation of zero? O2 at 25.O degrees C and 1 atm Fe at 1200 degrees C C2H6 at standard conditions Cl2 at 2 atm

Business Math
March 31-21 (Date of note)=10 days remaining. Take the 60 days-10 (days remaining in march)=50-30 (days in April)=20 days So, the maturity date of the note is May 20th.

Math
I=PRT I=40,000*.14*25/360=$388.89 (interest) $15,000-388.89=$14,611.11 (amt. of partial payment left to reduce the principal) 40,000-14,611.11=$25,388.89 (adjusted principal balance) $25,388.89*.14*20/360=197.47 10,000-197.47=9802.53 25,388.89-9802.53=15,586.36 15,586.36*.14*...

chemistry
For the following reaction in acidic solution. Cr2O7^2- + I- ---> Cr^3+ + IO3- Give the total balanced net ionic equation.

chemistry
For the following reaction in acidic solution. Cr2O7^2- + I- ---> Cr^3+ + IO3- give the balanced half reduction reaction. Indicate the oxidizing species.

chemistry
Sorry the equation is: Cr2O7^2- + I- ---> Cr^3+ + IO3^- (dont sure the balanced equation)

chemistry
0.125g of sodium dichromate is to be reacted wtih 0.025M potassium iodide. How many mLs of the potassium iodide solution will be needed. (Use your balanced equations above.)

chemistry
Using your 0.0100M oxalate solution and only the equipment and supplies listed below, describe how to prepare a 0.00025M solution of oxalate. Note, you are not allowed to add volumes with pipettes. (example, if you want 20mLs, you can not use a 10mL + 10mL addition as this ...

physics
a flask contains helium gas at 11k. the flask is thermally isolated and the gas is allowed to escape slowly through a narrow tube until the pressure within the flask is 0.98 atm and the temperature is 4.2K. if the gas is ideal, find the initial pressure for the flask to be ...

science
what is the probability of a right handed person and a left handed person having a heterozygous child? homozygous dominant? homozygous recessive?

Probability & Statistics
Charmaine is looking at the rental car prices for Get You There Rental Car Company. The cost is based on how many miles you plan to drive the rental car. Use the list of rental prices to answer the questions 1- 5. Miles Cost 200 $80 600 $120 1000 $160 1400 $200 1800 $320 1) ...

Probability & Statistics
Charmaine is looking at the rental car prices for Get You There Rental Car Company. The cost is based on how many miles you plan to drive the rental car. Use the list of rental prices to answer the questions 1- 5. Miles Cost 200 $80 600 $120 1000 $160 1400 $200 1800 $320 1) ...

English
THank you SO much

English
im using APA and also if i site my sources in my essay do i use parenthesis or quotation marks? And also if i take something from a website word to word do i use quotation around it? or parenthesis?

English
its not a question its more like a four page essay. Can you tell me if i'm using a website how should i reference it? should i write the name of the website or the topic?

English
Ms. Sue can i please have your email address I really need your help with my essay

Math
A container holds 12 red marbles, 10 blue marbles, and 14 green marbles. You will randomly select two marbles without replacement. -Fill in the probabilities on each branch of the tree diagram. Use the boxes with the fraction bars already provided. -Use the tree diagram to ...

LA
D .

LA
jerry came to school incognito like superman in his clark kent glasses question; as used in the passage what does incogonito mean ? a. strength b. in a cape c. dressed formally D. disguised i pic C or D am i cerrect?

lA
yes im sorry i have misspelled that word

lA
the havasupai are ararian; they live off the summer crops they grow in the valley. .. .. what is the meaning of the word agrariam as is used in the sentence? A. farming the land to survive b . hunting south of the canyon c . herding animals such as deer d . making a livelihood...

science
Calculate the de Broglie wavelength of a 0.44 kg ball moving with a constant velocity of 26 m/s (about 60 mi/h).

Intermidete Algebra
A rectangle's length is twice its width and it's perimeter is 48m. Find the dimensions.

math
@steve Why is the base of the box 16-2x by 10-2x (where did the 2x come from?)

math
An open box is made from a rectangular piece of cardboard measuring 16 cm by 10cm. Four equal squares are to be cut from each corner and flaps folded up. Find the length of the side of the square which makes the volume of the box as large as possible. Find the largest volume

Chemistry
20 ml of 0.1 M acetic acid was mixed with 25 ml of 0.1 M Sodium Acetate. The pH was measured to be 4.43. 5 ml of 0.1 M Sodium Hydroxide was added to the buffer and the pH was measured to be 4.60. Calculate the pH of the buffer before and after the addition of NaOH.

Chemistry
1 g of acid was mixed with 120 ml of distilled water and the solution was filtered into a clean dry beaker. A 25 ml aliquot of this solution was titrated with 0.1120 M NaOH. The pH of the acid was recorded to be 4.42. Calculate the initial concentration of the weak acid and ...

Math
A gasoline tank contains 500 liters of gasoline. By the end of each day, 70% of the gasoline remains. When will there be less than 100 liters in the tank?

Math
Find the first five terms of the sequence using the recursive rule: a1 = 2/3, and An = 5a N-1

Chemistry
A 30.0-ml sample of 0.165 M propanoic acid is titrated with 0.300 M KOH. What is the pH at 5 ml of added base, at 10 ml of added base?

chemistry
Calculate whether or not a precipitate will form if 1.40 mL of 0.62 M NH3 are added to 4.4 L of 1.0 10-3 M FeSO4.

11
A ball is dropped vertically from height of 30 meters after bounces.The ball reaches a max height to 60% of height of the previous bounce. What are the terms of the sequence. What is the height to the nearest tenth of a meter of the ball after the tenth bounces?

Management Science
Riverside oil company in eastern Kentucky produces 3 different grades of gasoline. They are regular, premium, and supreme grades. Each barrel of regular grade sells for $82 while premium grade sells for $88 per barrel and supreme grade sells for $89 per barrel. Petroleum ...

Physics
A roller coaster cart travelling due north at 20m/s that turns left during an interval of 4.0s without changing speed. Find the average acceleration. I understand the mathematics behind it (using pythagoras's theorem to find velocity and the formula acceleration = velocity...

math
5 radical 3

math
Express 4 radical 75

math
thanks

math
The bases on a baseball diamond are 90 feet apart. How far is it from home plate to second base? Please explain

Chemistry
The pH of a 1 .00 x 10-2 M solution of cyanic acid(HOCN) is 2.77 at 25 degrees. Calculate Ka and pKa for HOCN from this result.

MATH
A ladder is 25 ft long. The ladder needs to reach to a window that is 24 ft above the ground. How far away from the building should the bottom of the ladder be placed? Please show work.

Chemistry
Thank you so much

Chemistry
Iodine is mainly found in water in the trioxide ion, I3 which is formed by the combination of molecular iodine, I2 and Iodide, I-, according to the equation: I2(aq) +I-(aq) <----> I3(aq) QUESTION: how does the system in the equilibrium seem to respond to the changes ...

Ms. Sue Please HELP
Adam is 5 years younger than Eve. In 1 year, Eve will be three times as old as Adam was 4 years ago. Find their ages now.

Math
6 and8

Math
yes thanks

Math
sorry

Math
Barry is 8 years older than his sister. In 3 years, he will be twice as old as she will be then. How old is each now? Please show work! I don't understand.

American Goverment
What European country was England's primary rival in North America? In which colonies did the citizens have the most power over their own affairs? About how long after the conflict between Britain and the colonies broke into open warfare was the Declaration of Independence...

Math
solve for x in the interval [0,2π): 3csc^2(5x)=-4

math
For a fundrasier, the Best Buddies club sold t-shirts. The adult shirts were $15 per shirt and the youth shirts were $12 per shirt, and they made a total of $330 on the shirts. If they sold a total of 26 shirts, how many of each did they sell? I don't understand this, so ...

Physics
A 0.03-kg bullet is fired vertically at 200m/s into a 0.15-kg baseball that is initially at rest. The bullet lodges in the baseball and, after the collision, the baseball/bullet rise to a height of 37m. (a). What was the speed of the baseball/bullet right after the collision...

Math
At a concession stand, popcorn costs $1.10 and nachos cost $2.35. One day, the receipts for a total of 172 popcorn and nachos were $294.20. How many popcorns were sold. Please show work! I don't understand

Math
15 😝

Chemistry
calculate the enthalpy change for: (enthalpy of formation of aqueous sodium hydroxide is -469.60 kJ/mol. enthalpy of formation of liquid water is -285.8 kJ/mol) 2Na + 2H2O = 2 NaOH + H2

chemistry
a weather balloon partially filled w/ 33.5 L of helium @ 18 deg C & .95 atm. what volume will helium occupy @ -23 deg C w/ a pressure of 3 x 10 to the -3 atm?

chemistry
calculate the # of moles of oxygen in 2 L @ 24 deg C & 750 torr

Chemistry
# of moles of oxygen in 2 L @ 24 deg C & 750 torr?

chem hwk help!
Given the following reaction: 3 CaCl2 + 2 H3PO4 Ca3(PO4)2 + 6 HCl How many grams of H3PO4 are needed to react completely with 1.837 g of CaCl2? I don't understand at all

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