Tuesday

September 16, 2014

September 16, 2014

Total # Posts: 1,068

**algebra**

Find A ∪ B. (Enter your answers as a comma-separated list.) A = {2, 4}, B = {0, 1, 2, 3, 4, 5}
*February 16, 2012*

**science**

heck yea
*February 16, 2012*

**science**

When girls get pregnant, how do they babies get defected?
*February 16, 2012*

**algebra**

Al has 76 nickels and dimes worth$5.55. How many of each coins does Al have?
*February 15, 2012*

**statistics**

How is the rejection region defined and how is that related to the z-score and the p value? When do you reject or fail to reject the null hypothesis? Why do you think statisticians are asked to complete hypothesis testing? Can you think of examples in courts, in medicine, or ...
*February 14, 2012*

**physics**

A 1 500-kg car rounds an unbanked curve with a radius of 52 m at a speed of 12 m/s. What minimum coefficient of friction must exist between the road and tires to prevent the car from slipping? (g = 9.8 m/s2)
*February 9, 2012*

**statistics**

Assume that a population is normally distributed with a mean of 100 and a standard deviation of 15. Would it be unusual for the mean of a sample of 3 to be 115 or more? Why or why not?
*February 1, 2012*

**ecology**

In what environments would you expect obligate homeotherms to have the most significant advantages, and in what environments might facultative homeotherms have an edge?
*January 29, 2012*

**Managerial Economics**

The demand function for a cola-type soft drink in general is Q = 20-2P, where Q stands for quantity and P stands for price. At which price would a change in price and quantity result in approximately no change in total revenue? Why?
*January 28, 2012*

**statistics**

250 out of 500 students is going to give you 0.5. After that you will need to multiply that number by 360. your equation will look something like this: 0.5 x 360 = 180 your welcome! :)
*January 28, 2012*

**physics**

A cat that has a mass of 6 kg climbs to the top of a tree that is 20 m high. How much potential energy does the cat have at the top of the tree?
*January 26, 2012*

**British literature**

the answer is NOT B. he's basically confessing to murdering his wife and destroying her happiness when she didn't follow his orders. knowing that, it rules out everything else but......
*January 24, 2012*

**physics**

a .300 kg baseball is thrown at a speed of 6.5m/s. the batter hits the ball and it flies into the outfield at a speed of 19.2 m/s. How much work is done into hitting the baseball
*January 22, 2012*

**geometry**

the coordinate of p are (-2,5) and the coordinates of q are (6,1). a.what is the slope of pq? b.what is the equation? c.what are the coordinates of the mp of pq? d. what is the eqquation of the perpendicular bisector of pq?
*January 19, 2012*

**Finance**

A bond that has a $1,000 par value (face value) and a contract interest rate of 11.9. The bonds have a current market value of $1,120 and will mature in 10 years. The firm's marginal tax is 34%. What is the cost of capital from this bond debt?
*January 15, 2012*

**physics**

1----------2 - - - - - - - - - - 3-----------4 Sorry this is a horrible square but I couldnt copy the image. The A is on corner 1 and the two charges are on corners 3 and 4.
*January 12, 2012*

**physics**

Two tiny objects with equal charges of 59.0 µC are placed at two corners of a square with sides of 0.355 m, as shown. How far above and to the left of the corner of the square labeled A would you place a third small object with the same charge so that the electric field ...
*January 12, 2012*

**preap physics**

In joules
*January 11, 2012*

**preap physics**

A 15.4kg block is dragged over a rough horizontal surface by a constant force 191N acting at an angle of 25.3 degrees above the horizontal. The block is displaced 80.4m and the coefficient of kinetic friction is. 2 A) find the magnitude of the work done by the force of ...
*January 11, 2012*

**Science**

If blue eyes are dominant to green eyes, and two parents have a 50% chance of producing offspring with green eyes. What must the genotypes and phenotypes be for the parents of the offspring. Complete a punnett square to answer this question.
*January 11, 2012*

**math**

array of stickers using the product of3 times 15
*January 9, 2012*

**finance**

14–1. (Defining capital structure weights) Templeton Extended Care Facilities, Inc. is considering the acquisition of a chain of cemeteries for $400 million. Since the primary asset of this business is real estate, Templeton’s management has determined that they will...
*January 3, 2012*

**Beginner Chemistry!**

5.460 x 10^4
*December 19, 2011*

**Math grade 6**

Evaluate 4x for each value of x. write the answer in simplest form. x = 3/8
*December 15, 2011*

**geometry**

for kite ABCD, if RA=15, and BD= 16, find AD
*December 14, 2011*

**Calculus**

straight line has a distance of 1 mile
*December 14, 2011*

**Calculus**

Assuming the earth is a perfect sphere of raius 3950 miles, find (in inches) d. d, is the difference between the arc and a straight line.
*December 14, 2011*

**Physics **

Two ropes are attached to a wagon, one horizontal to the west with a tension force of 30 N, and the other east and at an angle of 30° northward and a tension force of 40 N. Find the components of the net force on the cart. Show all your work.
*December 10, 2011*

**Physics**

An airplane wing is designed so that the speed of the air across the top of the wing is 274 m/s when the speed of the air below the wing is 193 m/s. The density of the air is 1.29 kg/m3. What is the lifting force on a wing of area 25.0 m2? ...
*December 8, 2011*

**Chemistry **

What is the molarity of OH- in a 7.83×10-3 M NaClO solution that hydrolyzes according to the equation. ClO-(aq) + H2O(l) = OH-(aq) + HClO(aq) The information they give is that constants Kh=2.86E-7 I know how to solve the problem when the constant Kw is involved (1E-14) i...
*December 5, 2011*

**trig**

We are doing trig identities in school. I need help with these five: 1.1+sinx/1-sinx=cscx+1/cscx-1 2.tanx+sinx/1+cosx=tanx 3.sec^2x/sin^2x=1/sin^2x+1/cos^2x 4.tan^2x/1+tan^2x=1-cos^2x 5.sinx-sin^3x/cos^3x=tanx
*December 4, 2011*

**Math**

Also, do i have to use numbers like 5.99 and 6.01 to find the rate of change @ t = 6s
*December 3, 2011*

**Math**

Do i have to make a tangent line?
*December 3, 2011*

**Math**

How do i figure out the instantaneous rate of change with given graph and it says find the rate at t = 6 s
*December 3, 2011*

**Math**

Thanks~ I understand #2 now. If I have more questions, do I post them here or post a new question?
*December 3, 2011*

**Math**

is it $49 or 4900? you said R(6) = -36 + 72 + 13 = 49
*December 2, 2011*

**Math**

Can someone help me with these questions? 1.What are the maximum and minimum values for Y=28(1.21)^x on the interval 0<x<12? a) 275.8 and 0 b) 275.8 and 28 c) 249.7 and 28 d) 188.4 and 28 2. For what value of x does the maximum or minimum of f(x)= x^2 +8x + 12 occur? Is ...
*December 2, 2011*

**Math-Help asap please~**

Oh wow thanks~
*December 1, 2011*

**Math-Help asap please~**

somebody? :|
*December 1, 2011*

**Math-Help asap please~**

how did you get h^2/2?
*December 1, 2011*

**Math-Help asap please~**

= 0.5(-6+h)^2 + 6(-6+h)+ 7.5 - (-10.5)/h *
*December 1, 2011*

**Math-Help asap please~**

For each function, the point given is the maximum or minimum. Use the difference quotient to verify that the slope of the tangent at this point is zero. a) f(x) = 0.5x^2 + 6x + 7.5; (-6, -10.5) Difference quotient is f(a + h) - f(a)/h m= f(a+h) - f(a)/h = f(-6+h) - f(-6)/h = 0...
*December 1, 2011*

**Statistics**

True or False: If the value of the correlation, r, is zero then there is no association between the two quantative variables.
*December 1, 2011*

**Statistics**

In the July issue of Archives of Neurology, researchers reported studying the smoking habits of 12000 people (3000 with Parkinson's disease and 9000 healthy people). They found that those who had smoked the most (the equivalent of a pack a day for 60 years) had the lowest ...
*December 1, 2011*

**Statistics**

The weights of trout in a certain river follow a normal distribution with mean 3 pounds and standard deviation 0.8 pounds. What proportion of trout weigh between 3.2 pounds and 4.8 pounds? a.) .3891 b.) .9972 c.) .9452 d.) .5865
*December 1, 2011*

**math**

I still need a answer plz!!!
*November 30, 2011*

**math**

sorry about that the fraction is negative
*November 30, 2011*

**math**

how do you do one third (h) is less than or equal to 7? do you need to reciprocate the fraction?
*November 30, 2011*

**Math**

Could someone answer this question so I understand it. The answer is 28.0, but i'd like to know how to do it. Thanks Randomly selected cars were weighed, and the highway fuel consumption amounts (in miles/gal) were determined. For 20 cars, the linear correlation ...
*November 30, 2011*

**Statistics**

I have the answer to this question,, but i'd like to know how to do it. I need help finding z. Any help would be great. Thanks. Children and McDonaldfs In a Sports Illustrated for Kids survey of 603 children, 43% preferred McDonaldfs for fast food. The next ...
*November 28, 2011*

**Geometry**

The piolet of a single-engine airplane flies at a constant speed of 200 km/h at a bearing of N 25 degree E. There is a 40 km/h crosswind blowing southeast (S 45 degress E). What are the plane's actual speed and direction? Round the speed to the nearest tenth and the ...
*November 28, 2011*

**Geometry**

thank you soo much :)
*November 28, 2011*

**Geometry**

To reach a campsite, a hiker first walks for 2 mi at a bearing N 40 degree E. Then He walks 3 mi due east. What are the magnitude and direction of his hike from his stating point to the campsite? Round the distance to the nearest tenth of a mile and the direction to the ...
*November 28, 2011*

**human resources**

A job description is like a deed of property ownership and describes what the job includes and what must be done to adequately perform the job. In some ways these job descriptions limit management's rights or opportunities to change job requirements at will and as such ...
*November 27, 2011*

**computers**

Suppose the information portion of packet (D in figure 5.4) contains 10 bytes consisting of the 8-bit unsigned binary ASCII representation of string “Link Layer.” Compute the internet checksum for this data. Can someone explain to me how is this done? Info in D is: ...
*November 26, 2011*

**math~ helpp pplease**

Thanks and no, it doesn't state whether or not its a parabola, etc. f(3) = 5? isn't x=3 and y=5? also, how is f(-x+1) = 1 :S did you factor out the negative?
*November 24, 2011*

**math~ helpp pplease**

(3,5) is a point on the graph of y = f(x). Find the corresponding point on the graph of each of the following relations a) y=3f(-x + 1) + 2 what do I do with the negative sign before the x (-x)?
*November 24, 2011*

**econ**

2. Suppose that firms in an industry have the following cost function: C = 100 + 0.25q2, and the industry faces an inverse demand curve of P = 90 – 2Q. a. I f the industry is competitive, find the long-run equilibrium price, quantity, and profit of a typical firm. How ...
*November 18, 2011*

**econ**

12. A monopolist faces a constant marginal cost of $1 per unit. If at the price he is charging, the price elasticity of demand for the monopolist’s output is –0.5, then
*November 18, 2011*

**geometry**

The width of a rectangle is 6 cm less than its length. If the area of the rectangle is 135 square cm, find the dimensions. Then find the perimeter of the rectangle.
*November 15, 2011*

**world history**

cambodia is the answer right ?
*November 15, 2011*

**math**

1/2 of students walk to school. 1/3 of students take the bus. What is the remainder? Put in order from from greatest to least.
*November 15, 2011*

**geometry**

a rectangle measures 30 feet by 20 feet and has a post at each corner and a post every 2ft. How many posts in all?
*November 15, 2011*

**Math**

Input x 2 output y=17, input x 4 output y=28, input x 6 output y=42, what is the rule for the table?
*November 15, 2011*

**Chemistry**

draw the alkyne formed when 3,4-dichloroheptane is treated with an excess of a strong base such as sodium amide. I got CH3CH3C(triple bond)CCH2CH3 but was told it was the wrong answer
*November 9, 2011*

**Chemistry**

CH3CH2CH(BR)CH=C(BONDED TO A METHYL ON ONE SIDE AND AN ETHYL ON THE OTHER)
*November 9, 2011*

**calculus**

fourth degree polynomial p(x) whose graph is symmetric about the y-axis, and which has a y-intercept of 10, and global maxima at (1,13) and (-1, 13).
*November 7, 2011*

**Algebra 2**

log^10000x=
*November 5, 2011*

**Algebra 2**

y=ln(x-10)
*November 5, 2011*

**Organic Chemistry**

What is the name of this alkene CH3-CH2-CH-CH=C-CH3 | | BR CH2CH3
*November 5, 2011*

**Organic chemistry**

draw the alkyne formed when 3,4-dichloroheptane is treated with an excess of a strong base such as sodium amide. I got CH3CH3C(triple bond)CCH2CH3 but was told it was the wrong answer.
*November 5, 2011*

**Organic Chem**

How would I assign priority to 1,2-dimethylcyclopropane?
*November 1, 2011*

**precal**

A pole 12 meters tall is perpendicular to level ground. A taut wire that is 20 meters long extends from the top of the pole to the ground. What is the angle of elevation, to the nearest degree, from the bottom of the wire to the top of the pole?
*October 27, 2011*

**science**

Lab 1.1 Can somebody please, please help me with this lab?! I know it requires sketching and modeling which only i can do , but please, any help will be appreciated. I find these labs so hard to do, but my teacher said there's no alternative assignment and I HAVE to do ...
*October 23, 2011*

**science**

Lab 1.1 Can somebody please, please help me with this lab?! I know it requires sketching and modeling which only i can do , but please, any help will be appreciated. I find these labs so hard to do, but my teacher said there's no alternative assignment and I HAVE to do ...
*October 23, 2011*

**found of tech **

Lab 1.1 Can somebody please, please help me with this lab?! I know it requires sketching and modeling which only i can do , but please, any help will be appreciated. I find these labs so hard to do, but my teacher said there's no alternative assignment and I HAVE to do ...
*October 23, 2011*

**Algebra 2**

The surface area S (in square centimeters) of a large dog can be approximated by the model S = 11.2m^2/3 where m is the mass (in grams) of the dog. A Labrador retriever’s mass is about three times the mass of a Scottish terrier. Is its surface area also three times that ...
*October 23, 2011*

**Algebra 2**

As a rule of thumb, the power P (in horsepower) that a ship needs can be modeled by P = d^2/3 • s^3 / c where d is the ship’s displacement (in tons), s is the normal speed (in knots), and c is the Admiralty coefficient. If a ship displaces 30,090 tons, has a normal ...
*October 23, 2011*

**Mathematics**

There is a two-digit number such that the sum of its digit is 6 while the product of the digits is 1/3 of the original number. Find this number. Explain your solution
*October 23, 2011*

**chemistry**

aspirin tablets contain about 5 grains of aspirin. About 10 grams of aspirin constitute a fatal dose. How many tablets would this be? (There are approximately 15 grains in a gram)
*October 22, 2011*

**nutrition and wellness**

Write a 300-500 word essay. Provide Three examples of sporting events, or fitness activities, with which you have been involved. Describe what energy pathway was used in that sport or activity and explain why you are matching the pathway with the activity. Try to give an ...
*October 20, 2011*

**Algebra 2 **

I have a rectangular prism and I need to know the dimensions of it and the x values of it from the given information. x(15-x) by x(12-x).
*October 18, 2011*

**algerbra 2 **

x^5*x^3 simplify the expression
*October 17, 2011*

**algerbra 2 **

x^5*x^3 simplify the expression
*October 17, 2011*

**algerba 2 **

x=4y-1 solve the equation for y show steps
*October 17, 2011*

**algebra2 **

x+1/2y=5 solve the equation for y show steps
*October 17, 2011*

**algerba 2**

3x-2y=12 solve the equation for y
*October 17, 2011*

**algerba 2**

write the polynomial function of least degree that has real coefficeents the given zeros, and a leasing coefficiennt of 1. 1,-3,4
*October 16, 2011*

**algerbra 2**

evalute the function for x= -4, -3,-2,...,4. 1)y=x^4-2x^2-x-1
*October 16, 2011*

**Algebra 2**

Describe the end behavior of the graph of the polynomial function. Then evaluate the function for x=-4, -3, -2, -1, 0, 1, 2, 3, 4. Then graph the function. Number one: y=x^4-2x^2-x-1
*October 15, 2011*

**Algebra 2**

Describe the end behavior of the graph of the polynomial function. Then evaluate the function for x=-4, -3, -2, -1, 0, 1, 2, 3, 4. Then graph the function.y=x^4-2x^2-x-1 and y=(x-3)(x+1)(x+2)
*October 15, 2011*

**Algebra 2**

f(x)=x^3-7x^2+10x+6 (find the zeros of this quadratic equation)
*October 15, 2011*

**algebra 2**

write a polynomial function of least degree that has real coefficeints the given zeros and a leading coefficient of 1. the problem is 5,2i,-2i
*October 14, 2011*

**physics**

A 2.9 kg object oscillates with simple harmonic motion on a spring of force constant 430.0 N/m. The maximum speed is 0.8 m/s. What is the total energy of the object and the spring?
*October 12, 2011*

**calculus**

air expands adiabatically in accordance with the law PV =cost. pound per square inches ,at what rate is pressure changing when the volume is decreasing 1 cubic per second?
*October 10, 2011*

**Stats**

Each of 2 players, independently, play a game 5 times, with each game having probability of success 0.40. What is the standard deviation of the sum of the games they win
*October 9, 2011*

**Physical science**

A satellite that is 4175 miles from the center of the earth, orbits with a period of 90 minutes. What is its centripetal acceleration?
*October 6, 2011*

**physical science**

A satellite that is 4175 miles from the center of the earth, orbits with a period of 90 minutes. What is its centripetal acceleration?
*October 6, 2011*

**Algebra 2**

520.5 miles the equation should look something like this 23.95 + .1x= 76
*October 1, 2011*

**physics**

A 3.20 kg block is in equilibrium on an incline of 29.6 The acceleration of gravity is 9.81 m/s2 . What is Fn of the incline on the block? Answer in units of N
*September 30, 2011*

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