Thursday

October 23, 2014

October 23, 2014

Total # Posts: 73,061

**Pre-Calculus/Trigonometry**

Help please Tracy has a cell phone plan that provides 250 free minutes each month for a flat rate of $29. For any minutes over 250, Tracy is charged $0.35 per minute. Which of the following piecewise functions represents charges based on Tracy's cell phone plan? A. f(x)={...
*September 12, 2014*

**physics**

You are enjoying a day at the amusement park, riding a roller coaster, when suddenly a section of track up ahead crashes to the ground. You estimate that the cart is travelling at 5 m/s horizontally on the track before you begin to fall through the air. If the coaster leaves ...
*September 12, 2014*

**Canadian history**

Thank you very much Ms. Sue :)
*September 12, 2014*

**chemistry**

when 21.6g of carbon were burned in the presence of 73.9g of oxygen 16.3g of oxygen remain unreacted. What mass of carbon dioxide was produced
*September 12, 2014*

**programming**

write a program that performs a survey tally on vehicle. The program should prompt for the next person until a sentinel value of -1 is entered to terminate the program. Each person participating in the survey should choose their favorite from the following list-toyota,nissan,...
*September 12, 2014*

**programming**

write a program that performs a survey tally on vehicle. The program should prompt for the next person until a sentinel value of -1 is entered to terminate the program. Each person participating in the survey should choose their favorite from the following list-toyota,nissan,...
*September 12, 2014*

**Science (college level)**

dentify the fruit or vegetable you selected and relate the second law of thermodynamics to the changes in energy observed in Appendix CHow did the amount of energy gained compare to the amount of energy lost as heat at the second through fourth trophic levels? Considering the ...
*September 12, 2014*

**Math Problem (please help)**

IF x = 3 How much is 2(6x) + 2 (W)
*September 12, 2014*

**math**

fill in the following table, assets required for operation $2000 Case A - firm uses onlyequity financing Case B - firm uses 30% debt with a 10%interest rate and 70% equity Case C - firm uses 50% debt with a 12% interst rate and 50% equity
*September 12, 2014*

**physic**

what would the reading on the scale if the boxcar were moving at a constant velcity
*September 12, 2014*

**Finance**

Assets required for operation: $2,000 Case A – firm uses only equity financing Case B – uses 30% debt with a 10% interest rate and 70% equity Case C – firm uses 50% debt with a 12% interest rate and 50% equity
*September 12, 2014*

**physic**

A 22.2 kg mass attached to a spring scale rests on a smooth, horizontal surface. The spring scale, attached to the front end of a boxcar, reads T 44.1 N when the car is in motion. If the sring scale reads zero when the car is at rest, determine te acceleration of te car, when ...
*September 12, 2014*

**Math Problem (please help)**

If X= 3 How the is the perimeter of the rectangle 2(6X) + 2(W)=?
*September 12, 2014*

**Math (2nd time posting this)!**

So the first one would be 10^-6 and the second one would be 10^6 ?
*September 11, 2014*

**Math (2nd time posting this)!**

the best order-of-magnitude estimate for 0.00006? - 10^-3 - 10^-4 - 10^-5 * my answer - 10^-6 the best order-of-magnitude estimate for 789,000? - 10^7 - 10^6 - 10^5 - 10^4 *my answer I don't understand this quite well but I want to make sure my answers are correct. Thanks!
*September 11, 2014*

**Physics**

A military jet is flying with uniform motion at 9.3*10^2 m/s[S], the magnitude of which is approximately Mach 2.7. At time zero, it passes a mountain top, which is used as the reference point for this question. a)Construct a table showing the plane's position relative to ...
*September 11, 2014*

**Math**

the best order-of-magnitude estimate for 0.00006? - 10^-3 - 10^-4 - 10^-5 * my answer - 10^-6 the best order-of-magnitude estimate for 789,000? - 10^7 - 10^6 - 10^5 - 10^4 *my answer I don't understand this quite well but I want to make sure my answers are correct. Thanks!
*September 11, 2014*

**English**

1) is real-life one word? My teacher considered it to be. 2) then would Spanish-Americans be one word?
*September 11, 2014*

**Poll**

Have you ever been a hero? If so, what did you do
*September 11, 2014*

**?**

What challenge have you faced lately? ask at least 5 people
*September 11, 2014*

**Physics**

A car traveling 91km/h strikes a tree. The front end of the car compresses and the driver comes to rest after traveling 0.93m . What was the magnitude of the average acceleration of the driver during the collision? Express the answer in terms of "g's," where 1....
*September 11, 2014*

**college math**

v=1/3ttr^2h; h(geometry)
*September 11, 2014*

**college math**

How many liters of water should be evaporated from 110 liters of a 12% saline solution so that the solution that remains is a 20% saline solution
*September 11, 2014*

**college math**

A motorboat left a harbor and traveled to an island at an average rate of 11 knots. The average speed on the return trip was 10 knots. If the total trip took 4.2 hours, how far is the harbor from the island?
*September 11, 2014*

**physics**

How far is the rocket from the launch pad 8.50s later when the rocket engine runs out of fuel?
*September 11, 2014*

**Ecology**

8.Which of the following examples of an ecological study involves the ecosystem level of organization? A.The effects of human activities on biogeochemical cycling B.The effects of an invasive plant species on bird nesting sites C.The effects of competition on survival D.The ...
*September 11, 2014*

**MATH**

A motorboat left a harbor and traveled to an island at an average rate of 11 knots. The average speed on the return trip was 10 knots. If the total trip took 4.2 hours, how far is the harbor from the island?
*September 11, 2014*

**science**

Which of the following is a good study habbit.
*September 11, 2014*

**Physics**

At bat a baseball player hits a ball at a height of .889 m. The ball leaves the bat at 51 m/s at an angle of 81 degrees from the vertical. The ball skims the top of a 2.74 m wall as it leaves the field. a.) Draw position, velocity and acceleration graphs describing the ball ...
*September 11, 2014*

**math**

The length of a rectangle is 3 feet less than twice the width of the rectangle. If the perimeter of the rectangle is 144 feet, find the width and the length
*September 11, 2014*

**Accounting**

On March 1, 2013, the company lent a supplier $23,000 and a note was signed requiring principal and interest at 9% to be paid on February 28, 2014. If the journal entries are intrest recievable intrest revenue how much should I allocate to each section?
*September 11, 2014*

**chemistry**

If you have 0.833g of copper(II) sulfate, how many moles doo you have?
*September 11, 2014*

**math**

Write in an integer that represents your height on the teeter totter that is relative to the balance point height: you are 8 inches below the balance point height or you are 15 inches the balance point height---your height is the opposite or your friend is 12 inches above the ...
*September 11, 2014*

**chemistry **

Calculate the ÄHvap , in kJ/mol, for ethanol, given that the vapor pressure at 45.0°C is 155.0 torr. The normal boiling point of ethanol is 78°C. Express your answer to two decimal places.
*September 11, 2014*

**Chemistry please help**

104 ml of ethene, C2H4 is burned in 408 ml of oxygen, producing carbon dioxide and some liquid water. Some oxygen remain unreacted. Calculate the volume of carbon dioxide produced and the volume of oxygen remaining
*September 11, 2014*

**physics**

A hockey puck truck at ice level just clears the top of a glass wall that is 2.80 m high. The flight time to this point is 0.650 s, and the horizontal distance is 12.0 m. Find a.) the initial speed of the puck and b.) the maximum height it will reach.
*September 11, 2014*

**physics**

A hockey puck truck at ice level just clears the top of a glass wall that is 2.80 m high. The flight time to this point is 0.650 s, and the horizontal distance is 12.0 m. Find a.) the initial speed of the puck and b.) the maximum height it will reach.
*September 11, 2014*

**Math**

2/3 of miss lina's class were boys. there were between 2 and 14 boys. One day, twin girls joined the class. Now 3/5 of the students are boys. how many students are in miss lina's class now?
*September 10, 2014*

**Geometry**

Find AB in simplest form if A(0,3) and B(2,7) AB=___________ *I need help on this last problem I have! Someone please walk me through and how to get the answer
*September 10, 2014*

**Physics **

An 18-year-old runner can complete a 10.0-km course with an average speed of 4.39 m/s. A 50-year-old runner can cover the same distance with an average speed of 4.27 m/s. How much later (in seconds) should the younger runner start in order to finish the course at the same time...
*September 10, 2014*

**Quick geometry question**

My geometry teacher said something about when putting supplementary down for the answer doesn't quite necessarily work all the time. Is that true? Why is that? Would it be best just to put linear pair in for supplementary?
*September 10, 2014*

**physics**

The captain of a plane wishes to proceed due west. The cruising speed of the plane is 226 m/s relative to the air. A weather report indicates that a 32.0-m/s wind is blowing from the south to the north. In what direction, measured with respect to due west, should the pilot ...
*September 10, 2014*

**Physics-bobpursley Follow Up**

Initial Question: A rubber ball is dropped onto a ramp that is tilted at 20 degrees. A bounding ball obeys the "law of reflection," which says that the ball leaves the surface at the same angle it approached the surface. The ball's next bounce is 3.0 m to the ...
*September 10, 2014*

**chemistry**

A system initially contains 0.100 mol each of the three species sealed in a 10.0 L container. The temp was raised to a temp where the equilibrium constant Kc, is 12.6 for PCl3(g) + Cl2(g)--> <-- PCl5(g) Calculate the equilibrium concentration of all species.
*September 10, 2014*

**chemistry**

A system initially contains 0.100 mol each of the three species sealed in a 10.0 L container. The temp was raised to a temp where the equilibrium constant Kc, is 12.6 for PCl3(g) + Cl2(g)--> <-- PCl5(g) Calculate the equilibrium concentration of all species.
*September 10, 2014*

**Math**

How do you know which operation to choose when solving a real life problem?
*September 10, 2014*

**physics**

A kangaroo jumps straight up to a vertical height of 1.19m, how long was it in the air before returning on earth
*September 10, 2014*

**math**

A recipe that makes 7 servings calls for cup of apple juice and cup of cranberry juice. How many cups of juice are there per serving?
*September 10, 2014*

**Trig**

Two people decide to find the height of an obelisk. They position themselves 25 feet apart in line with, and on the same side of, the obelisk. If they find that the angles of elevation from the ground where they are standing to the top of the obelisk are 65 degrees and 44 ...
*September 10, 2014*

**business math**

On May 1, 2004 the Jones Company received a bank statement that showed a $2,950 balance. Mr. Jones showed a $4,010 checking account balance. The bank did not return check No. 124 for $1080 and check No. 138 for $720. A $3,200 deposit made on April 30 was in transit. The bank ...
*September 10, 2014*

**college algebra**

A doctor prescribes an ointment that is 4% hydrocortisone. A pharmacist has 1% and 5% concentrations in stock. How many ounces of each should the pharmacist use to make a 3-ounce tube?
*September 10, 2014*

**college algebra**

An executive invests $22,000, some at 8% and some at 6% annual interest. If he receives an annual return of $1,680, how much is invested at each rate?
*September 10, 2014*

**physics**

A toy rocket, launched from the ground, rises vertically with an acceleration of 28 m/s2 for 9.5 s until its motor stops. Disregarding any air resistance, what max- imum height above the ground will the rocket achieve? The acceleration of gravity is 9.8 m/s2 . Answer in units ...
*September 10, 2014*

**physics**

A ball player catches a ball 3.70s after throwing it vertically upward, what speed did he threw it
*September 10, 2014*

**Algebra**

Find the price of any container of lemonade at a local grocery store. (You can also find prices in advertisements and on the Internet.) Make sure you write down the number of fluid ounces in the container. Determine the unit price and post the information.
*September 10, 2014*

**college algebra**

A taxi cab company charges a flat fee of $3.30 and then an additional $2.20 for each mile. If a taxi fare is $29.70, how many miles was the trip?
*September 10, 2014*

**Physics**

Henry Heavyweight weighs 1400N and stands on a pair of bathroom scales so that one scale reads twice as much as the other. What are the scale readings?
*September 10, 2014*

**English**

If nonsense were actually said by a person, then which is correct? He told it off as "Nonsense." He told it off as "nonsense." Is punctuation correct?
*September 10, 2014*

**Math**

Write a word phrase for each algebraic expression. 14.1 - w z/8 - 9
*September 10, 2014*

**Math**

Compare the numbers in each exercise using an inequality symbol. 5 2/3, square root 29
*September 10, 2014*

**Math**

Write a word phrase for each algebraic expression. 14.1 - w and z/8 - 9
*September 10, 2014*

**maths**

classify the following into quadrilaterals: triangle,rectangle,pentagon,hexagon,parralelogram
*September 10, 2014*

**Math**

-20 is the answer.
*September 10, 2014*

**physics**

a pump fills a tank of capacity 300 m^3 in 5 hours.the tank is situated at a height of 20 m.if the efficiency of the tank is 65%. then calculate the power of the engine which has driven the pump.
*September 10, 2014*

**math**

rice seedlings will be planted to a 20 m x 25 m area at 20 cm x 20 cm spacing, with 2 seedlings per hill. if the area is a rectangle having 25 meter long rows what will be the resulting plant population density?
*September 10, 2014*

**math**

Steve, Lindsay, and Christine are the lead singers in a band. They will sing 18 songs. Lindsay will sing 8 songs. Christine will sing 6 fewer songs than Stevie. How many songs will stevie sing.
*September 10, 2014*

**math**

Steve, Lindsay, and Christine are the lead singers in a band. They will sing 18 songs. Lindsay will sing 8 songs. Christine will sing 6 fewer songs than Stevie. How many songs will stevie sing.
*September 10, 2014*

**math**

*This is orders of magnitude* 1)So, I have to estimate 16,700,000,000,000,000 the product of a single digit of 10. - 2 x 10^16 - 2 x 10^15 *my answer* - 1 x 10^16 - 1 x 10^15 2)0.00000394 estimated as the product of a single digit. ____ x 10____ *fill in the blanks* *my answer...
*September 10, 2014*

**physics**

Tammy drives 34 km due north, then continues in a direction of 32◦ north of east for 99 km.What is her total displacement from the office?
*September 9, 2014*

**math help**

the sum of three consecutive odd integers is 435. What is the largest of the three integers??how do I solve this problem?? Please help
*September 9, 2014*

**Math**

A swim club charges a one-time registration fee of $30 plus $18 per month to maintain the membership. What is the total charge for a membership for t years? A. 18(t + 30) B. t(12 x 18) + 30 C. t x 18 + 30 D. $126
*September 9, 2014*

**Grade**

What is my grade if I have two 100's and two 70's
*September 9, 2014*

**math help**

(y^3)^-2 (y^2)^0÷y^-3 the answer is1/y^3. I just don't understand how is that answer. Please explain
*September 9, 2014*

**PRECALCULUS**

A rectangle has an area of 18 m2. Find a function that models its perimeter P in terms of the length x of one of its sides.
*September 9, 2014*

**physics**

1.A motorist drive along a straight road at a constant speed of 15.0 m/s.Just as she passes a parked motorcycle police officer,the officer starts to accelerate at 2.0 m/s^2 to overtake her. Assuming the officer maintains this acceleration, a) determine the time it takes the ...
*September 9, 2014*

**english**

Thank you but it needs to be for a research paper, and my teacher will not accept blogs. Also, doesn't literary criticism have to compare the novel to another?
*September 9, 2014*

**english**

I need to find literary criticism for the book Of Human Bondage for my essay, but I am unable to find it. Can you help me?
*September 9, 2014*

**Biology**

For each of these properties, give an example of how water’s properties affect life on earth. Able to dissolve salt or sugar • unable to dissolve oil • high surface tension (cohesion) • capillary action (cohesion + adhesion) • liquid more dense than ...
*September 9, 2014*

** finance help plz**

Flem company considering replacing a filling line at oklahoma.The existing line was purchased several years ago 600,000.The line book value is 200,000, and flem managament feels that could be sold at this time for $150,000.A new increased capcity line can be purchased for 1,...
*September 9, 2014*

**math**

how do i draw a graph to represent a class of students and all their marks are out of 100
*September 9, 2014*

**Physics**

A rubber ball is dropped onto a ramp that is tilted at 20 degrees. A bounding ball obeys the "law of reflection," which says that the ball leaves the surface at the same angle it approached the surface. The ball's next bounce is 3.0 m to the right of its first ...
*September 9, 2014*

**physics**

-5.01
*September 9, 2014*

**physics**

A sports car moving at constant velocity travels 110m in 5.1s .If it then brakes and comes to a stop in 4.3s , what is the magnitude of its acceleration (assumed constant) in m/s2?
*September 9, 2014*

**fiannce hw help plzzz**

Flem company considering replacing a filling line at oklahoma.The existing line was purchased several years ago 600,000.The line book value is 200,000, and flem managament feels that could be sold at this time for $150,000.A new increased capcity line can be purchased for 1,...
*September 9, 2014*

**Physics**

Find the attractive force bet a 50 kg girl and a 60 kg boy, if they stand 2.00 m apart.
*September 9, 2014*

**physics**

Cars A and B are racing each other along the same straight road in the following manner: Car A has a head start and is a distance DA beyond the starting line at t=0. The starting line is at x=0. Car A travels at a constant speed vA. Car B starts at the starting line but has a ...
*September 9, 2014*

**math**

-6.98+0.475=
*September 9, 2014*

**Science/Biology**

In DNA bases, CG is one pair and AT is another pair because the double ring bonds with the single ring. Why can't Guanine bond with Thymine?
*September 9, 2014*

**physics**

A sports car accelerates from rest to 86km/h\, km/h in 5.2s\, s . What is its average acceleration in m/s2{\rm{m/s}}^2.
*September 9, 2014*

**English/Grammar**

How do I make this parallel? Lots of my friends think that Prince's music is old, but I think it's not only excellent but also an innovation.
*September 9, 2014*

**Pyhsics**

what is the speed of the rocket when it is 345 m above the surface of the earth?
*September 9, 2014*

**Pre-Calculus/Trigonometry**

okay, thanks!
*September 9, 2014*

**Pre-Calculus/Trigonometry**

Help Me, Please Here is a table of values for y = f(x). x: 0, 5, 10, 15, 20, 25, 30, 35, 40 f(x): 5, 6, 7,8, 9, 10, 11, 12, 13 Mark the statements that are true. A. f(5) = 6 B. The domain for f(x) is the set {5, 6, 7, 8, 10, 11, 12, 13}. C. The range for f(x) is all real ...
*September 9, 2014*

**physics**

a rolling ball moves x1 = 8.0 cm to x2 = -4.3 cm during a time interval t1= 3.5 to t2- 6.9, what is the average velocity over this time interval
*September 9, 2014*

**Biology**

In DNA bases, CG is one pair and AT is another pair because the double ring bonds with the single ring. Why can't Guanine bond with Thymine?
*September 9, 2014*

**Biology**

17.Which one of the following statements is true regarding voluntary and involuntary responses? A.Voluntary responses control the activity of glands. B.Involuntary responses are part of the autonomic system. C.Voluntary responses originate in the sensory receptors. D....
*September 9, 2014*

**physics**

A 1600n is supported by two cables of equal length two ends are fasted by two nail by place horizontal level at 8m part .find the tension each cables when the block6m below the horizontal level.
*September 9, 2014*

**algebra**

Last semester, a certain professor gave 41 As out of 215 grades. If one of the professor's students from last semester were selected randomly, what is the probability that student received an A? (Assume that each student receives one grade.)
*September 9, 2014*

**algebra**

Jessica is baking a cake. The recipe says that she has to mix 96 grams of sugar to the flour. Jessica knows that 1 cup of this particular sugar has a mass of 128 grams. She added one over two of a cup of sugar to the flour. Should Jessica add more sugar to make the exact ...
*September 9, 2014*

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