Sunday

April 26, 2015

April 26, 2015

Total # Posts: 1,220

**Math**

is the area of a paperback book cover closer to 28 square inches or 28 square centimeters? Tell how you decided.
*April 21, 2015*

**Chemistry - Help**

Please help..Write the equation for the equilibrium constant (K) of the reaction. 2K2CrO4 + 2HCl --><-- Cr2O7 + H2O + 2KCl (K2CrO4 is chromate) and (Cr2O7 is dichromate)
*April 12, 2015*

**Chemistry**

Consider the reaction between acetylene, C2H2, and oxygen in a welding torch: If 5.4 moles of acetylene react with sufficient oxygen, how many grams of CO2 will be formed?
*April 6, 2015*

**Chemistry**

The chemical equation for ionic reaction between Na2S and AgNO3??
*April 1, 2015*

**H Chemistry**

if 1.01x103 ml of h2o gas at stp is compressed into o.345ml container what would the new pressuer be
*March 14, 2015*

**Math**

A student scores 74 out of 100 on a test,If the maximum score is 100. What score does the student need at least an average of 80?
*March 1, 2015*

**math**

Mary spent $5.39 on apples, if the cost is$0.98 per pound, how many pounds did Mary buy?
*January 8, 2015*

**math**

I still do not understand, this is 6th grade math
*January 8, 2015*

**math**

Mary spent$5.39 on apples. If the cost is $0.98 per pound, how many pounds did Mary buy?
*January 8, 2015*

**Precalculus**

I divided by 800 on both sides to get xtan33=(x/800)tan 35.
*December 29, 2014*

**Precalculus**

Could I solve (800+x)tan33=xtan35 like xtan33=(x/800)tan35?
*December 29, 2014*

**Pre-Calculus**

How do you solve the equation(800+x)tan33=xtan35?
*December 29, 2014*

**algebra**

To find the amount A in an account after t years with principal P and an annual interest rate r compounded continuously, you can use the formula
*December 13, 2014*

**algebra (please help)**

A total of $22,000 is invested in two municipal bonds that pay 4.25% and 5.75% simple interest. The investor wants an annual interest income of $1085 from the investments. What amount should be invested in the 4.25% bond?
*December 13, 2014*

**algebra (please help)**

Two cheeseburgers and one small order of French fries from a fast-food restaurant contain a total of 1120 calories. Three cheeseburgers and two small orders of French fries contain a total of 1870 calories. Find the caloric content of each item. cheeseburger calories french ...
*December 13, 2014*

**algebra**

A small fast-food restaurant invests $4,000 to produce a new food item that will sell for $4.59. Each item can be produced for $2.19. (a) How many items must be sold to break even? (Round your answer to the nearest whole number.) items (b) How many items must be sold to make a...
*December 13, 2014*

**Math**

eight members of a club will make a paper chain. the chain is 4 feet long. each member will make an equal part. how much of the chain , in feet, will each member make?
*December 9, 2014*

**algebra (please help)**

A small fast-food restaurant invests $4,000 to produce a new food item that will sell for $4.59. Each item can be produced for $2.19. (a) How many items must be sold to break even? (Round your answer to the nearest whole number.) items (b) How many items must be sold to make a...
*December 5, 2014*

**algebra (please help)**

A small software company invests $30,000 to produce a software package that will sell for $64.95. Each unit can be produced for $42.25. (Round your answers to the nearest whole number.) (a) How many units must be sold to break even? units (b) How many units must be sold to ...
*December 5, 2014*

**algebra**

Solve the equation algebraically. Round the result to three decimal places. Verify your answer using a graphing utility. e−^8x − 6xe^−8x = 0 x = I need help solving this problem.
*December 5, 2014*

**algebra**

Solve for x. (Round your answer to three decimal places.) log7 x = 1/2 x=
*December 1, 2014*

**Algebra**

Find a mathematical model representing the statement. (Determine the constant of proportionality.) v varies jointly as p and q and inversely as the square of s. (v = 2.1 when p = 4.2, q = 5.4 and s = 2.4.) v =
*November 25, 2014*

**math problem (please help)**

What are the dimensions of a rectangular tract of land if its perimeter is 70 kilometers and its area is 300 square kilometers? km (smaller value) akm (larger value)
*November 24, 2014*

**Algebra**

ã2x -4 = ã7x + 9 Don't' have a clue. I tried squaring both sides to get rid of the square root but it just isn't working.
*November 14, 2014*

**Dine **

Men spend an average of 29 minutes per day on weekends and holidays exercising and playing sports. They spend an average of 23 minutes per day reading. A random sample of 25 men resulted in a mean of 35 minutes exercising with a standard deviation of 6.9 minutes and an average...
*November 10, 2014*

**math**

Wanda is shopping for a pet carrier for her cats one small Carrie I can hold 240 ounces her cat weighs 12 pounds can the carrier hold the cat
*November 5, 2014*

**probability**

WaterPlant is 121 miles from the store. Assuming an average speed of 65 miles per hour, how many hours will it take the truck to drive from the bottling plant to the store? Round to one decimal place. How long is that in minutes? Show all your calculations.
*October 28, 2014*

**?**

list at least 10 things that have energy and label what type of energy it is. EX:car diving by =kinetic energy;car parked=potential energy
*October 8, 2014*

**quanta tive skills and reasoning **

In a class of 250 students it was found that 140 took math 85 took psychology and 65 took both math and psychology how many students in the class took math or psychology?
*September 27, 2014*

**Physics**

A car is traveling at 72 km/hr. The driver begins to apply the brakes and the begins to slow with a constant acceleration (a). After the brakes are applied, the car stops in a distance of 100 m. What is the acceleration? My teacher gave the class a list of formulas but didn&#...
*September 23, 2014*

**Physics**

the acceleration due to gravity on the moon is 1/6 that on earth. For a projectile with an initial velocity of 15m/s upward what would be the maximum height and total time of flight on the moon and on the earth?
*September 18, 2014*

**math**

One side of triangle is one-third the longest side. The third side is 13 feet less than the longest side. The perimeter is 106. Find all three sides.
*September 17, 2014*

**Math Problem (please help)**

State sales tax is based on retail price. An item that sells for $115.99 has a sales tax of $8.12. Find a mathematical model that gives the amount of sales tax y in terms of the retail price x. (Round the coefficient to two decimal places.) y = Use the model to find the sales ...
*September 10, 2014*

**Math**

6x+50 the answer is C
*September 9, 2014*

**Math!**

you're welcome
*September 9, 2014*

**Math!**

7a-11b yes its D
*September 9, 2014*

**Math Problem (please help)**

thank you :)
*September 9, 2014*

**Math Problem (please help)**

The simple interest on an investment is directly proportional to the amount of the investment. By investing $4250 in a certain bond issue, you obtained an interest payment of $106.25 after 1 year. Find a mathematical model that gives the interest I for this bond issue after 1 ...
*September 9, 2014*

**Math Problem (please help)**

Find the zeros (if any) of the rational function. (If there are no zeros, enter NONE.) g(x) = (x^3-64)/(x^2+2) need help solving
*September 9, 2014*

**Math Problem (please help)**

Write the logarithmic equation in exponential form. ln e = 1 How do I do that?
*September 9, 2014*

**Math Problem (please help)**

Thank you :)
*September 9, 2014*

**Math Problem (please help)**

On the day of a child's birth, a deposit of $30,000 is made in a trust fund that pays 3% interest, compounded continuously. Determine the balance in this account on the child's 30th birthday. (Round your answer to two decimal places.)
*September 9, 2014*

**Algebra**

-7x+8y=-8 -2x+6y=-6
*September 9, 2014*

**algebra plz check answer**

How many real zeros does y = 3x 4 - 2x 2 + x - 3 have? A. 5 B. 4 C. 3 D. 2 my answer is d
*September 8, 2014*

**please check see if im correct**

A cereal manufacturer claims to include 18.7 ounces of cereal in each box, with a standard deviation of 0.2 ounces. A random sample of 25 boxes shows an average of 18.5 ounces. Which of the following statements is correct? A. The claim is likely untrue, according to a z-value ...
*September 8, 2014*

**check and see if correct**

Which organ is NOT a part of the digestive system? A. Esophagus B. Gallbladder C. Kidneys D. Mouth My answer would be mouth
*September 7, 2014*

**Math plz check if correct**

In multiplication, if one term is negative and one term is positive, the result will always be ______. A. equal to zero B. negative C. inverted D. positive my answer is A
*August 31, 2014*

**Math check see if i;m coorrect**

In division, a problem includes a divisor, a dividend, and a(n) ______. A. product B. sum C. expression D. quotient My answer is b
*August 31, 2014*

**Math Problem (please help)**

Thank you so very much Damon!!!! :-)
*August 28, 2014*

**Math Problem (please help)**

A small fast-food restaurant invests $4,000 to produce a new food item that will sell for $4.59. Each item can be produced for $2.19. (a) How many items must be sold to break even? (Round your answer to the nearest whole number.) items (b) How many items must be sold to make a...
*August 28, 2014*

**HISTORY**

I believe the answer is A
*August 28, 2014*

**Math Problem (please help)**

A small software company invests $30,000 to produce a software package that will sell for $64.95. Each unit can be produced for $42.25. How many units must be sold to break even? How many units must be sold to make a profit of $100,000?
*August 28, 2014*

**History**

I think its the ancient Egyptian, but it depends on your choice for the this question.
*August 28, 2014*

**College Algebra**

Use the position equation given below, where s represents the height of the object (in feet), v0 represents the initial velocity of the object (in feet per second), s0 represents the initial height of the object (in feet), and t represents the time (in seconds), as the model ...
*August 27, 2014*

**Statustics**

A survey found that women’s heights are normally distributed with mean 63.4 in and standard deviation 2.5 in. A branch of the military requires women’s heights to be between 58 in and 80 in. a. Find the percentage of women meeting the height requirement. Are many ...
*August 4, 2014*

**english**

Identify the verbal in this sentence as infinitive, gerund or participle. Wearing protective clothing is a good precaution against infection.
*July 27, 2014*

**Chemistry**

Suppose 26.0g of sodium bromide is dissolved in 150mL of a 0.60M aqueous solution of silver nitrate. Calculate the final molarity of bromide anion in the solution. You can assume the volume of the solution doesn't change when the sodium bromide is dissolved in it.
*July 26, 2014*

**eng III**

Analyze the sentence to select the adverb clause, subordinating conjunction, and the word(s) modified in the appropriate boxes below. He responds whenever he is called.
*July 16, 2014*

**english**

Analyze the sentence to select the adverb clause, subordinating conjunction, and the word(s) modified in the appropriate boxes below. Please get to bed early since you have a test tomorrow.
*July 16, 2014*

**math**

Sandra has a collection of beads. Of the beads, 45% are silver. She has 108 silver beads. How many beads are in her collection?
*June 21, 2014*

**math**

helen shared some syrup with rani in the ratio of 5 : 3. helen got 1 l(italic) of it how many milliliters of the syrup did rani get?
*June 20, 2014*

**College Algebra**

i dont know
*April 21, 2014*

**math**

if sound travels 6770 feet in 6.4 seconds. how far will it travel in one minute
*April 19, 2014*

**question**

Quick question, If I post a question on here would you be able to delete it?
*April 15, 2014*

**Algebra**

Thank you
*April 12, 2014*

**Algebra**

If Sam takes 6 hours to paint a house, and Pat takes 12 hours to paint the same house; how long with it take the 2 men to paint the same house together? What is the correct formulary?
*April 12, 2014*

**math**

Sandra makes a pizza she puts mushrooms on 2/8 of the pizza she adds green peppers to 5/8 of the pizza which topping covers more of the pizza
*March 25, 2014*

**calculus**

Skeletal remains had lost 70% of the C-14 they originally contained. Determine the approximate age of the bones. (Assume the half life of carbon-14 is 5730 years. Round your answer to the nearest whole number.)
*March 2, 2014*

**algebra**

Your monthly commission as an appliance sales person is represented by the equation, S = 50x+450, where 50 is the rate paid for each appliance sold, x is the number of appliances sold, 450 is the base pay per month, and S is the salary. Complete the following table to ...
*February 12, 2014*

**Physics**

A penny is dropped from a 50 m high bridge, how fast was the penny moving when it hit the water?
*January 28, 2014*

**Physics**

A penny is dropped from a 50 m high bridge, how fast was the penny moving when it hit the water?
*January 28, 2014*

**biology**

In which stage of mitosis does DNA replication occur?
*January 28, 2014*

**earth**

What causes sedimentation in the ocean?
*January 28, 2014*

**physics**

is this right?if 5.0m/s^2=6.0m/s-0/1.2s a=fn/m 5.0m/s=15.0N/3kg show that the 5.0m/s^2 acceleration can result from a net force of 15N exerted on a 3.ok cart
*January 20, 2014*

**pre-algebra**

1. Jaron is downloading a file. The size of the file is 3200 KB. It takes 3 minutes to download the first 1200KB of the file. If the file continues downloading at the same rate, how many more minutes will it take to finish downloading? 2. Jacob is selling t-shirts at a music ...
*December 21, 2013*

**math**

estimate each unit rate.1) 295 words in 6 minutes.find each unit price.then tell which has the lower unit rate. 2) $3.99 for 25fl.oz of detergent or $6.99 for 90 fl.oz of detergent.3) $d/12 hr= $96/8 hr 4. One molecule of nitrogen reacting 3 molecules of hydrogen makes 2 ...
*December 21, 2013*

**math**

write each ratio in simplest form..1) 2 yards to 15 feet.2) in a survey,9 out of 10 doctors recommended a certain medicine.if 80 doctors were surveyed,how many doctors recommended the medicine? 3)find each unit rate.travel 804 miles in 16 hours.4) the mass of a diamond is 1.76...
*December 21, 2013*

**Physics**

Analyzing Roller Coaster Performance Using Conservation of Mechanical Energy At the beginning of a roller coaster ride, the car is lifted to the top of a large hill and released. The speed of the car at the top of the hill is small, so we will assume it to be zero. The car ...
*November 30, 2013*

**Physics**

Mars has a moon (Phobos) with an orbital period of 7.67 hours and an orbital radius of 9.4x106 m. Use Kepler’s 3rdLaw to estimate the mass of Mars.
*November 30, 2013*

**Physics**

Two blocks are attached together with a piece of string. Block #1 (3 kg) slides along a rough horizontal surface and block #2 (2 kg) hangs off the end of the surface. If the blocks accelerate at 2.5 m/s2 in the directions shown, determine the tension in the string and the ...
*November 30, 2013*

**Physics**

A regulation baseball has mass 145 g and diameter 22.86 cm. Will this ball float or sink in water? Vsphere = € 4 3π⋅r3
*November 30, 2013*

**Physics**

A 200g block of copper at 90o C is dropped into 400g of water at 27o C contained in a 300g glass beaker at 27o C. What is the final equilibrium temperature of the mixture? cCu = 0.0924 cal/g°C cglass = 0.2 cal/g°C cwater = 1 cal/g°C
*November 30, 2013*

**Physics**

Gas is confined in a tank at a pressure of 10.0 atm and a temperature of 15o C. If half of the gas is withdrawn and the temperature is raised to 65o C, what is the new pressure of the gas?
*November 30, 2013*

**Physics**

A 1-liter aluminum container at 20o C is filled with 0.975 liters of mercury at 20o C. If both the container and the mercury are heated, at what final temperature will the mercury completely fill the container? (Hint: this is a volume expansion problem) αAl = 24 × ...
*November 30, 2013*

**Physics**

A pair of eyeglass frames made of plastic with a coefficient of linear expansion of 1.30x10-4 (Cº ) -1 have circular lens holes of diameter 4.40 cm at room temp (20º C). To what final temperature must the frames be heated in order to insert lenses 4.42 cm in diameter...
*November 30, 2013*

**Physics**

A 10 kg penguin slips down a rough incline of 35o . If the coefficient of kinetic friction between the penguin and the incline is 0.15, determine the penguin’s acceleration.
*November 20, 2013*

**Physics**

A ball on the end of a string is cleverly revolved at a uniform rate in a vertical circle of radius 85.0cm. If its speed is 4.15 m/s and its mass is 0.300 kg, calculate the tension in the string when the ball is (a) at the top of its path, and (b) at the bottom of its path.
*November 20, 2013*

**Physics**

A Jet plane traveling 1800 km/h (500 m/s) pulls out of a dive by moving in an arc of radius 6.00 km. What is the plane’s acceleration in g’s?
*November 20, 2013*

**Physics**

Mars has a moon (Phobos) with an orbital period of 7.67 hours and an orbital radius of 9.4x106 m. Use Kepler’s 3rdLaw to estimate the mass of Mars.
*November 20, 2013*

**Physics**

A 25 g bullet is fired from a rifle with a barrel of length 65 cm. The bullet starts from rest at one end of the barrel and experiences an average force of 1200 N due to the expanding gases as it moves down the length of the barrel. a) Calculate the work done on the bullet by ...
*November 20, 2013*

**Physics**

Two blocks are attached together with a piece of string. Block #1 (3 kg) slides along a rough horizontal surface and block #2 (2 kg) hangs off the end of the surface. If the blocks accelerate at 2.5 m/s2 in the directions shown, determine the tension in the string and the ...
*November 20, 2013*

**History**

What is the significance of the black stone and where is it located? How did the caravan trade benefit the Arabian peninsula in the fifth and sixth centuries and why did the trade routes change during this time?
*November 13, 2013*

**History**

Identify the changes in the arabian peninsula during the 600's
*November 13, 2013*

**Language Arts**

Can you explain this quote for me???? "weathered many bitter nights"
*November 13, 2013*

**Language Arts**

wait sorry I mean Why is he referred to as "the strategist Odysseus'? To this the strategist Odysseus answered: “My lady goddess, here is no cause for anger. My quiet Penelope-how well I know- Would seem a shade before your majesty, Death and old age being ...
*November 13, 2013*

**Language Arts**

To this the strategist Odysseus answered: Why is he referred to as "the strategist Odysseus'? “My lady goddess, here is no cause for anger. My quiet Penelope-how well I know- Would seem a shade before your majesty, Death and old age being unknown to you, While ...
*November 13, 2013*

**Language Arts**

I got it thank you very much :)
*November 13, 2013*

**Language Arts**

What does this comparison tell you? A gull patrolling between the wave crests of the desolate sea will dip to catch a fish, and douse his wings; no higher above the whitecaps Hermes flew
*November 13, 2013*

**History (Check Answers)**

True or False. 1. Raiding one’s enemies was known in the Quran as the “struggle in the way of God” or jihad. 2.The courage of the Arab soldiers was enhanced by the fact that they had superior weapons to most of their enemies. 3. Mu’awiyah moved the capital ...
*November 11, 2013*

**History**

True or False? The general mu'awiyah was known for one outstanding trait: he used more force than necessary whether it was needed or not
*November 11, 2013*