Tuesday

February 21, 2017
Total # Posts: 1,651

**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*

**Chemistry**

Thanks Paige! :D

*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*

**Economics**

3.3 Trillion

*October 26, 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*

**physics**

A 22 kg box rests on the back of a truck. The coefficient of static friction between the box and the truck bed is 0.369. The acceleration of gravity is 9.81 m/s2 . What maximum acceleration can the truck have before the box slides backward

*September 30, 2011*

**Physics**

A 27.59 kg child is on a swing that hangs from 2.26-m-long chains. What is her maximum speed if she swings out a 48° angle?

*September 29, 2011*

**Physics**

a stone is thrown horizontally from the edge of the cliff with speed of 18m/sec. Cliff is 50 meters high

*September 20, 2011*

**Spanish**

Mi abuela y yo ______________ en baton rouge. Kiara ___________________ en la clase. Yo _____________________ hablando. Ella _____________________ durmiendo. Cody, Justino, y Roberto __________________ felices.

*September 20, 2011*

**geomtry**

when two planes intersect, their intersection is a:

*September 19, 2011*

**Math**

344.80 spebds of it 3/4

*September 15, 2011*

**math**

polynomials (8m + 7) (2m +3)

*September 13, 2011*

**algerbra 2**

-3x(squared 2)-6x=0

*September 12, 2011*

**probability**

A set of five marbles is selected (without replacement) from a bag that contains 4 blue marbles, 3 green marbles, 6 yellow marbles, and 7 white marbles. How many sets of five marbles contain no more than two yellow ones?

*September 11, 2011*

**History**

but it shoes multiple choice and it has the regions but in numbers and the only one that was on east africa was 6 but it wasn't in the answer choices

*September 9, 2011*

**History**

Thats Exactly What I Put And They Said I Was Wrong

*September 9, 2011*

**History**

The Earliest Remains Of Hominid Ansestor Of Human Have Been Found In Which Region.? Anyone Could Answer This

*September 9, 2011*

**math**

I have a few other problems that I can't seem to understand... Question: Rounded to the nearest ten. I am 12,750. I am a multiple of 2. I use only 4 different number's in my 5 places... :-o

*September 5, 2011*

**math**

I am so sorry, but I am still confused especially when I read the last part of the problem... The number in my ones place is 1 less than the number in my tens place...

*September 5, 2011*

**math**

I am getting so confused with my math problems... Can you help me please?... The question is - Rounded to the nearest ten I am 800. I am not odd. All of my places have a value greater than 0. The number in my ones place is 1 less than the number in my tens place...

*September 5, 2011*

**English**

help me pleasee.

*September 4, 2011*

**math**

i am taking a job related test with many math sections. I am long out of school and need some tutorials as well as practice questions and answers. The topics are as follows: -multiplication and division of fractions and mixed numbers -calculating percentages -calculating ...

*September 3, 2011*

**math**

I am taking a job related test consisting of several math sections. I have been out of school for quite some time and am looking to find the easiest place to get tips and tutorials to solve these questions. The topics are as follows: multiplication and division of fractions ...

*September 3, 2011*

**homelandsecurity**

• Prepare a report that discusses the positive aspects of this action and the potential hazards

*September 1, 2011*

**English**

make parallel

*August 30, 2011*

**English**

i am both a quick worker and careful

*August 30, 2011*

**geometry**

The height of triangle ACE is 12 and base AE=20. A rectangle is inscribed in triangle ACE as shown in the diagram a) express the rectangle's area as a function of x and y b)Use the fact that triangle ACE is similar to BCD to write y as a function of x. c)express the ...

*August 30, 2011*

**Math**

Find the ldc for the fraction -11/245, 13/175

*August 27, 2011*

**Algebra**

Solve for u -29 + -4 + 5u

*August 27, 2011*

**Math**

Is the answer to this problem 12 pounds? A cubical block of metal weighs 6 pounds. How much will another cube of the same metal weigh if its sides are twice as long? My work: 6/12=6/x

*August 22, 2011*