Sunday
October 26, 2014

Posts by james


Total # Posts: 1,850

calculus
A lamp post 3m high is 6m from a wall. A 2m man tall is walking directly from the post toward at 2.5m/s. How fast is his 1.5 from the wall
October 20, 2014

mathematics
what is algerdra
October 17, 2014

chemistry
a sample of freon-12 occupies 25.5 litters at 28 celsius find its volume at 15 degree celcius when the pressure is kept constant
October 16, 2014

physics
A water balloon is launched at a building 24m away with an initial velocity of 18 m/s at an angle of 50° above the horizontal. If the balloon misses or shoots over the building, how far will the balloon land from its launch location?
October 13, 2014

physics
A water balloon is launched at a building 24m away with an initial velocity of 18 m/s at an angle of 50° above the horizontal. At what height will the balloon strike the building?
October 13, 2014

Cheeeem
how to calculate the weight of solute req'd to prepare 1 liter of 1 normal of: a.) LiOH b.) phosphoric acid HELP.
October 12, 2014

Physics
A plane starts from rest at the end of a runway and requires 200.0 km/h for takeoff . If it takes 30.0 a to reach takeoff speed, what acceleration must the plane's engines provide to get off the runway ?
October 7, 2014

CALCULOUS
A bank account is growing by 4.3 % per year. Find the doubling time. Round your answer to the nearest integer. Can someone explain how to solve this step by step. I have been stuck on this for quite a while
October 3, 2014

Pre Calc
Use the Rule of 70 to estimate how long it takes a dollar-sign 7000 investment to double if it grows at the annual rate 7 %. Compare with the actual doubling times. Round your answers to three decimal places. I found the estimated doubling time using Rule of 70 to be 10. I am ...
October 3, 2014

us history
These committees act as study groups for the House and Senate. (1 point) select committees conference committees joint committees standing committees
September 27, 2014

Math
Using the following cash flows for projects A and B, use payback period, discounted payback period, NPV, IRR, and MIRR to see if these are good projects or not. > Project A: (283,000); 46,000; 89,000; 104,000; 123,000; 187,000; and 72,000 > Project B: (318,000); 72,000; ...
September 27, 2014

Engineering Dynamics
A ball is thrown so that the motion is defined by the equations x=5t and y=2+6t-4.9t^2, where x and y are expressed in meters and t is expressed in seconds. a) find velocity at t=1s, b) find the horizontal distance the ball travels before hitting the ground.
September 25, 2014

physics
An airport has runways only 196 m long. A small plane must reach a ground speed of 38 m/s before it can become airborne. What average acceleration must the plane’s engines provide if it is to take off safely from its airport? Answer in units of m/s 2
September 23, 2014

physics
a 700 newton man is able to climb up 4.5 meters on a 6 meters ladder before it slips. What must be the coefficient of friction be if the ladder is arranged so that it makes an angle 50 degrees with the ground? Assume the ladder to be uniform and weighing 450 newtons.
September 23, 2014

math
an object weighing 40 tons hits an object at 40 MPH what is the force of the impact?
September 12, 2014

math
If bacterium divides every 20 minutes. How many will there be in a day?
September 10, 2014

Physics for Technology
I have been out of school 27 years; no Algebra or Trigonometry training: only remedial math. This class is part of a Diploma program, no placement test required - I am out of my depth. I had a tutor for an hour last Tues., with another appt. this Tues. Yet, like I told my ...
September 6, 2014

Chem
Determine the number of protons and electrons in each of the following ions. Na+ Enter your answers numerically separated by a comma. Np, Ne =
September 5, 2014

college algebra
1. simplify x^2+x-6/x^2-4 divided by x+3/2x+4
September 2, 2014

trigonometry
Write the quadratic function whose zeros are: 1. 2+square root of 5, 2-square root of 5 2. 3+7i,3-7i 3. 5±i Please tell me how to get them. I have no clue on how to solve them.
August 27, 2014

eng9
The White House has been home to many animals as well as presidents. (1 point) common noun proper noun compound noun collective noun
August 24, 2014

physics
A ship at sea is due into a port 600 km due south in two days. However, a severe storm comes in and blows it 200 km due east from its original position. How far is the ship from its destination?
August 24, 2014

College Algebra 1
Using the factoring method, solve for the roots of quadratic equation 4x^2=16
August 23, 2014

College Algebra 1
Factor by using the difference of two square formula 1-25z^2
August 23, 2014

static and dynamics
A box is at rest on a 34incline. what is the force of friction parallel to the ramp if box has a mass of 50-kg
August 20, 2014

probability
A bag contains 8 red, 12 white and 4 blue marbles. If 2 marbles are selected in succession (without replacement), find the probability as a common fraction in simplest form that first is red and second is blue
August 17, 2014

math
Thanks. That helps.
August 15, 2014

math
When the perimeter of an equilateral triangle is doubled, the result is 24. The length of a side of the original triangle is A. 4 B. 6 C. 8 D. 12
August 15, 2014

chemistry
A 52.3 kg sample of ethanol is needed for a reaction. What volume in liters of ethanol should be used? The density of ethanol is 0.789 g/mL
July 27, 2014

statistics
According to the MIT Airline Data Project, American Airlines controlled 15.5% of the domestic market in 2010. A random sample of 125 domestic passengers that year was selected. Using the normal approximation to the binomial distribution, what is the probability that more than ...
July 20, 2014

american government
With unfunded mandates, the national government?
June 29, 2014

american government
Nullification would have had the effect of returning the nation to the Article of Confederation because?
June 29, 2014

american government
The federal system can be thought of as a marble cake because?
June 29, 2014

Math
What's 25 inch by 12 1/2
June 27, 2014

Math
Your program has a proposed RDT&E-funded project scheduled to start in January 2005 which is expected to take 16 months to complete. The project is expected to cost a total of $16 million (then-year dollars), with cost expected to be incurred at a rate of $1 million per month...
June 24, 2014

Physics
Determine the electric force of a -8.0uc charge would experience when placed 14cm to the left of a 5.0uc charge. got 18N, but I'm not sure if I add the negative to the answer
June 18, 2014

Math
Write the quadratic function in standard form (if necessary) and sketch its graph. Identify the vertex. f(x)=x^2+3x+1/4
June 17, 2014

Engineering science
a 50kg mass is suspended from a spring, causing it to extend by 30mm. calceolate the spring stiffness? The mass is then pulled down a distance of 90mm and released. calculate the frequency of the resulting motion, assuming that this is simple harmonic, calculate the velocity ...
June 9, 2014

Finance
Pretty Lady Cosmetic Products has an average production process time of 40 days. Finished foods are kept on hand for an average of 15 days before they are sold. Accounts receivable are outstanding an average of 35 days, and the firm receives 40 days of credit on its purchases ...
June 7, 2014

Physics
Why is 5*10^3 multiplied by a electron charge?
June 4, 2014

correction
15m/s^2
June 4, 2014

Physics
A small charge that has lost 5.0 X 10^3 electrons and has a mass of 2.0 x 10^-6 kg experiences an acceleration of 15ms^2 when placed at a point P in space. Determine the magnitude and direction of the electric field at P
June 4, 2014

math
sqrt(350^2+400^2)=531.5ft 350+400= 750ft 750-531.5= 218.5ft The trip is 218.5ft shorter if you walk diagonally.
June 3, 2014

physics
sqrt(10^2+10^2)= 14.14m The total displacement is 14m North East
June 3, 2014

algebra
B does not equal the others .04*3000=120 .4*30=12 .4*300=120 .3*400=120
June 3, 2014

Physics
I don't think so, we just started on parallel plates in school and he assigned this question for homework and i have no clue how I would get the final velocity from what was given.
June 3, 2014

Physics
It does not say in the question
June 3, 2014

Physics
Determine the final velocity of an alpha particle (3.2x10^-19) if it is placed in a 7.2x10^6 n/c uniform field. The mass of the alpha particle is 6.64x10^-27
June 3, 2014

MGT
What is a project stakeholder? What are some examples of project stakeholders?
June 3, 2014

Science Please Help Me
R THESE THE RIGHT ANSWERS ?
June 3, 2014

chemistry
Use the systematic treatment of equilibrium to determine the pH and concentrations of species in 1.00 L of solution containing 0.065 mol citric acid (H3A), 0.025 mol 8-hydroxyquinoline (HB), and 0.040 mol KOH. Consider just acid-base chemistry. Ignore ion pairing and activity ...
May 23, 2014

Finance
The Fridge-Air Company's preferred stock pays a dividend of $4.50 per share annually. If the required rate of return on comparable quality preferred stocks is 14 percent, calculate the value of Fridge-Air's preferred stock. What fomula to use?
May 15, 2014

Math - Algebra
Ti'a rectangular gaden has perimeter of 20 meters. She wants its area to be at least 24 square metesr. Find the interval for the possible length of Tia's garden.
May 8, 2014

Math
A glass held 2/5 cup of water, Carlo poured out 3/8 cup, how much is left?
May 7, 2014

Chemistry
Did I ionize Mn2(CO3)3 correctly? Mn2(CO3)3 --> 2Mn^(3+) + 3CO3^(2-)
April 29, 2014

Math
At which points do the lines intersect 2x+y=8 y=-3(x-3) A. 0,8 B. 3,-2 C. 2,4 D. 1,6
April 28, 2014

Psycholohy
One way to measure the validity of a test would be to: you were testing for:
April 27, 2014

chemistry
What volume of ethanol must be diluted with water to prepare 315 mL of 0.620 M solution? The density of ethanol is given as 0.789 g/mL. Answer in units of mL
April 25, 2014

math 8th
Find the circumference of the given circle. Round to the nearest tenth. circle (1 point) 22.0 cm 38.5 cm 11.0 cm 42.8 cm
April 18, 2014

math
If Ѳ is in Quadrant II, and cos Ѳ=-3/4 , find an exact value for sin 2Ѳ.
April 18, 2014

algebra
write in expanded logarithmic form: ln (x y^3 z^7)
April 11, 2014

algebra
Solve: log x + log(x+15)=2
April 11, 2014

algebra
Solve: 7 ^(x+3) =519
April 11, 2014

math
Solve 40e^(0.6x) - 3=237
April 11, 2014

Espanol
Can I get some corrections? 1. ¿Qué estás haciendo? A. Estás sirviendo la cena. B. Estáis leyendo el texto. C. Me estoy levantando. D. No estás haciendo nada. C 2. ¿Entonces estás descansando? A. Sí, estás ...
April 2, 2014

math 8th
Find the measure of ∠s. angle s (1 point) 63° 153° 68° 148°
March 31, 2014

Chemistry
In the spectrum of a specific element, there is a line with a wavelength of 656 nm. Use the Rydberg equation to calculate the value of n for the higher energy Bohr orbit involved in the emission of this light. Assume the value for the lower energy orbit equals 2.
March 31, 2014

algebra
Which box-and-whisker plot shows the scores of ten students on a mathematics exam? 92, 76, 83, 97, 74, 81, 92, 91, 96, 87 (1 point) box and whisker plot box and whisker plot box and whisker plot box and whisker plot
March 31, 2014

Algebra
Rewrite the equation in Ax+By=C form. Use integers for A, B, and C. y-5=-5(x-2)
March 30, 2014

english
Think about the figurative language in this stanza. What is the speaker saying? (1 point) It is hard to find your way at night because it is dark. It is the middle of the night and she is hungry. People find life in being with others. People have to help each other with ...
March 29, 2014

algebra
Solve the following rational inequality. Write the solution in interval notation. Show the number line and breaking points or graph of the polynomial with the part of the graph that is the solution (x-4)(x+2)/(x-3)(x+5) ¡Ü 0
March 29, 2014

algebra
less than or equal to
March 28, 2014

algebra
Solve the following rational inequality. Write the solution in interval notation. Show the number line and breaking points or graph of the polynomial with the part of the graph that is the solution (x-4)(x+2)/(x-3)(x+5) ¡Ü0
March 28, 2014

algebra
write a fourth degree polynomial function with real coefficients that has -3,1/5, and 4+i as zeros and the y intercept of (0,5)
March 28, 2014

Algebra word problem
thanks Steve if I was to figure avg cost 3.6-7.2+4.493=.893 times 100 for a total of $89.30 per bike??
March 28, 2014

Algebra word problem
J's bike has determined that when x hundred bikes are built, the average cost per bike is given by C(x)= 0.1x^2-1.2x+4.993, where C(x) is in hundreds of dollars. how many bikes should the shop build to minimize the average cost per bike?
March 28, 2014

math
J's bike has determined that when x hundred bikes are built, the average cost per bike is given by C(x)= 0.1x^2-1.2x+4.993, where C(x) is in hundreds of dollars. how many bikes should the shop build to minimize the average cost per bike?
March 28, 2014

georgia history
hich of the following was a cause of the Great Depression? (Choose all that apply.) (3 points) the Stock Market Crash of 1929 Prohibition Failed crops and drought A lack of demand for goods
March 28, 2014

Algebra
Keiko is a software saleswoman. Let represent her total pay (in dollars). Let represent the number of copies of History is Fun she sells. Suppose that and are related by the equation . Answer the questions below. Note that a change can be an increase or a decrease. For an ...
March 27, 2014

Physics.
A dike in Holland springs a leak through a hole of area 0.60cm2 at a depth of 1.4m below the water surface. How much force must a boy apply to the hole with his thumb to stop the leak? Express your answer to two significant figures and include the appropriate units.
March 27, 2014

Physics
Calculate the average force per nail when Sarah (following figure), who weighs 130 pounds, lies on a bed of nails and is supported by 600 nails. Express your answer using two significant figures.
March 27, 2014

Physics.
The top floor of a building is 40m above the basement. Calculate how much greater the water pressure is in the basement than on the top floor. Express your answer to two significant figures and include the appropriate units.
March 27, 2014

Physics.
Calculate the water pressure at the base of the Hoover Dam. The depth of water behind the dam is 220m . Express your answer to two significant figures and include the appropriate units.
March 27, 2014

Physics
Pressure = weight density × depth Calculate the water pressure at the bottom of the 50-m-high water tower shown in the photo. Express your answer to two significant figures and include the appropriate units
March 27, 2014

math
if one rhombus measures 62 what are the remaining angle
March 25, 2014

science
. An advantage of using an electromagnet, shown on the crane in the image below, instead of a regular magnet to move cars in a junkyard is that an electromagnet can easily be turned on and off. A toy crane with an electromagnet lifting a toy car from a pile of cars (1 point) ...
March 22, 2014

science
an object being pulled to earth by gravity will have the force of air pushing back opposite directions
March 22, 2014

language arts
rewrite each sentence, adding commas where needed. which i was researching skateboards i found an interesting old newspaper story?
March 22, 2014

language arts
Resilient people usually a. complain when they have bad luck b. bring good luck to others c. are able to deal with setback
March 20, 2014

math 8th
1. The following circle graph was published in the Cane County annual report. If there are 1,000 registered voters in Cane County, how many are 35–45 years old? circle graph (1 point) 150 voters
March 20, 2014

Physics
An ice puck of mass m revolves on an icy surface in a circle at speed v at the end of a horizontal string of length L. The tension in the string is T Find the mass of the puck when the length of the string is 2.2m , string tension is 5.0N , and the tangential speed of the puck...
March 20, 2014

Physics
An ice puck of mass m revolves on an icy surface in a circle at speed v at the end of a horizontal string of length L. The tension in the string is T Write the equation for centripetal force, and substitute the values T and L appropriately. Then with a bit of elementary ...
March 20, 2014

Physics
The diameter of the base of a tapered drinking cup is 6.6cm . The diameter of its mouth is 9.8cm . The path of the cup curves when you roll it on the top of a table. How much faster does the mouth move than the base? Express your answer using two significant figures.
March 20, 2014

Physics
Calculate the tension in a horizontal string that whirls a 1.9-kg toy in a circle of radius 2.3m when it moves at 2.8m/s on an icy surface. Express your answer to two significant figures and include the appropriate units. 1.9(2.8)^2 .. then divid by 2.3 I got 12.30 N , is this...
March 20, 2014

Physics
A Plane flies north at 215 km/h. A wind from the east blows at 69km/h. What is the plane's new velocity with respect to the ground in standard position
March 19, 2014

Chemistry
Suppose you tried to carry out a double replacement reaction by mixing equal voulumes of a solution that contains dissolved NAOH and a solution that contains dissolved NACL. WHat would you expect to happen when the two solutions were mixed? Expain?
March 18, 2014

finance
Linda Scales is now employed as the managing editor of a well-known business journal. Although she thoroughly enjoys her job and the people she works with, what she would really like to do is open a bookstore of her own. She would like to open her store in about eight years ...
March 18, 2014

PHYSC101
Hormones that regulate the development and functioning of reproductive organs are called ________ hormones.
March 18, 2014

Physics
The coefficient of static friction between the m = 3.20-kg crate and the 35.0° incline of the figure below is 0.260. What minimum force vector F must be applied to the crate perpendicular to the incline to prevent the crate from sliding down the incline?
March 4, 2014

Math
Need help with this problem: Isolate the variable: -4(2x - 7) = -36
February 25, 2014

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