Saturday

February 13, 2016
Total # Posts: 312

**College- US History**

How has popular culture reinforced Cowboys of the West?
*January 29, 2016*

**Math**

Prove that cot²A(secA-1) = Cos A
*January 28, 2016*

**Finance**

****HELP PLEASE**** Given the following information, answer the following: TR=$3Q TC= $1,200 = $2Q 1. what is the break-even level of output? 2. If the firms sells 1,300 units, what are its earnings or losses? 3. If sales rise to 2,000 units, what are the firms earnings or ...
*January 26, 2016*

**Maths **

In a box of markers there are eight which have dried up and will not write. The box contains 15 red, 15 purple, 5 black and 10 white markers. A marker is picked at random from the box. Find the probability that a) it is red b) it is not black c) it is purple or white d) it is ...
*January 26, 2016*

**Finance**

Given the following information, answer the following: TR=$3Q TC= $1,200 = $2Q 1. what is the break-even level of output? 2. If the firms sells 1,300 units, what are its earnings or losses? 3. If sales rise to 2,000 units, what are the firms earnings or losses? 4. If the total...
*January 25, 2016*

**Maths**

The sum of two digits number is 7. In changing position of digits we get the number 9 less than the original number. What is number?
*December 31, 2015*

**PHYSICS**

If there is no dark matter, in order to explain our observations, our concepts of an important building block of the universe have to be incorrect. What is that building block and why do Astronomers overwhelmingly favor dark matter, which they cannot see, to explain our ...
*December 14, 2015*

**Physics / Astronomy**

If there is no dark matter, in order to explain our observations, our concepts of an important building block of the universe have to be incorrect. What is that building block and why do Astronomers overwhelmingly favor dark matter, which they cannot see, to explain our ...
*December 10, 2015*

**math**

how do I find how many times greater ? 9x10 to the 8 power is how many times greater than 3x10 to the 7 power?
*December 9, 2015*

**maths**

riposting this. the answer kindly supplied by Steve is beyond my understanding. all i want to know please is how long will the shadow be cast on the ground by a 3m tall vertical fence with the sun behind it as follows: THIS IS NOTHING TO DO WITH A LADDER A fence 3m tall is ...
*November 4, 2015*

**maths**

THIS IS NOTHING TO DO WITH A LADDER A fence 3m tall is erected vertically and parallel to a building that is 10m away please can someone tell me the maximum length of the shadow the fence will cast on the ground - thank you
*November 4, 2015*

**maths**

a fence 2m tall and 5m from a parallel building - what length is the shadow from the fence and how is this worked out?
*November 4, 2015*

**Math **

find the sum of 2 1/2 and 2/5
*October 16, 2015*

**Math**

2/3>3/ number that makes the statement true.. I am confused
*October 13, 2015*

**Social Studies**

thanks Ms.Sue!
*September 19, 2015*

**Social Studies**

thanks
*September 19, 2015*

**Social Studies**

What was the main purpose of the settlers who established Jamestown? a.to trap animals and sell furs b.to find gold and silver c.to farm tobacco d.to collect sweetgrass for baskets Would it be B? I am thinking B,or C.
*September 19, 2015*

**Math**

The local health club is advertising a special for new members: no initiation fee to join and lnly $34.50 per month for the first year. If Andy joins the health club for one year, how much will he spend on membership?
*September 14, 2015*

**Algebra**

The time, t, required to drive a certain distance varies inversely with the speed, r. If it takes 12 hours to drive the distance at 60 miles per hour, how long will it take to drive the same distance at 85 miles per hour? A. About 7.08 hours B. About 5.00 hours C. About 1.42 ...
*June 2, 2015*

**algebraic modeling**

A toy manufacturer determines that the daily cost,C, for producing x units of a dump truck can b approximated by the function c(x)=0.005x^2-x+109 I got that the manufacturer must produce 100 units per day... What is the minimum daily cost?
*May 13, 2015*

**math**

Why Was the Engineer Driving the Train Backwards?
*March 27, 2015*

**chemistry**

Thank a bunch
*March 13, 2015*

**chemistry**

What volume of 0.050 M AgNO3, silver nitrate solution is required to reat completely with 60.0 mL of 0.025 M K2S, potassium sulfide?
*March 13, 2015*

**Stats**

.638
*March 11, 2015*

**statistics**

observational study
*March 10, 2015*

**math -hw help**

Determine whether the following regular tetrahedrons have an edge length that is a whole number, a rational number or irrational number. The surface are of a tetrahedron is given by the equation: SA = √ 3s^2 Surface are of regular tetrahedron A = 1.5 Surface are of ...
*February 5, 2015*

**math (factors and products)**

How could you use an area model to identify the binomial factors of a trinomial?
*January 22, 2015*

**Math**

How could you use an area model to identify the binomial factors of a trinomial?
*January 21, 2015*

**physics**

A soccer ball is kicked with an initial horizontal velocity of 16.5 m/s from a 92 meter high cliff. Determine the time it took the ball to reach the ground and how far the ball got from the edge of the cliff.
*December 16, 2014*

**Algebra2**

log2(x+8)-log2(5)=4
*November 20, 2014*

**arithmetic**

If you have 3 cups of pineapple juice and, how many total cups of punch can you make? Table: Ginger Ale - 40% OJ 25% Pineapple juice 20% Sorbet 15
*November 3, 2014*

**Math**

Write a word phrase for this algebraic expression. 6.5-h
*October 28, 2014*

**Physics(Science)**

Waves on a 5.0 m rope travel at a speed of 92 m/s. If the tension in the rope is 497 N, what is the mass of the rope?
*October 26, 2014*

**elementary**

Magic square 13.6
*September 17, 2014*

**Physics**

A dart is thrown horizontally with an initial speed of 14 m/s toward point P, the bull's-eye on a dart board. It hits at point Q on the rim, vertically below P, 0.19 s later. (a) What is the distance PQ? (b) How far away from the dart board is the dart released?
*September 14, 2014*

**English**

how do I start an Auto Biography? I mean what sentence should i start it with?
*September 6, 2014*

**MATH HELP!!**

Thank you very much!
*August 20, 2014*

**MATH HELP!!**

Thank you,also can you explain and the number that it would make please
*August 20, 2014*

**MATH HELP!!**

SID WROTE 541,309 ON HIS PAPER. USING NUMBERS AND WORDS EXPLAIN HOW THE NUMBER WOULD CHANGE IF HE SWITCHED THE DIGITS IN THE HUNDRED THOUSANDS AND TENS PLACES
*August 20, 2014*

**cOLLEGE mAJORS**

ACCOUNTING VS IT WHICH IS HARDER? WHICH IS EASIER?
*August 12, 2014*

**math**

2^5/2 - 2^3/2
*August 9, 2014*

**Physics**

You are standing on a fish pond wishing to catch a fish. How would you aim your fish gun in order to catch a fish which your eyes could see 20 cm below the surface of water ? will u aim higher , lower or exactly on the location of the fish as seen by your eyes ? find out what ...
*July 27, 2014*

**Grammar**

Before the items that are complete sentences, write S. Before those that contain fragments, write F. Before a run on sentence, write RS. 1. We often walk through the woods, picking berries and listening to the birds. Is this a run on sentence?
*July 2, 2014*

**math**

how can i plot values in a parabola graph if the values are fractions. it's my first time with this things so i don't understand
*May 3, 2014*

**Science**

All correct!
*March 4, 2014*

**english**

9 - C. 10 - C. Not sure about this one. 11 - C. 12 - C. 13 - A. Not sure about this one either. 14 - D. 15 - C. 16 - A. 17 - A. I'm pretty sure most of these are right.
*February 5, 2014*

**english**

I'm doing the test now if you still need answers.
*February 5, 2014*

**Math**

If I has plots of (3,2) and (8,6) how would I find the area in square units
*January 29, 2014*

**Physics**

A firefighter of mass 73 kg slides down a vertical pole with an acceleration of 5 m/s2. The acceleration of gravity is 10m/s2. What is the friction foce that acts on him? Answer in units of N
*January 7, 2014*

**Spelling**

Wordly wise 3000 book 7 lesson 7c vocab answers?
*December 17, 2013*

**Science**

Uranium-238 is less stable than oxygen-16. What accounts for this difference? (A) Uranium is a solid, while oxygen is a gas. (B) Unlike oxygen-16, uranium-238 has a nucleus in which repulsive electric forces surpass the strong nuclear forces. (C) Oxygen-16 has fewer electrons ...
*November 20, 2013*

**math**

9 ft
*October 15, 2013*

**Math**

If sin(x) = 1/3 and sec(y) = 29/21 , where x and y lie between 0 and π/2, evaluate the expression using trigonometric identities. (Enter an exact answer.) cos(2y)
*September 23, 2013*

**English**

What type of clause or phrase is italicized in the sentence below? The play, a three-act farce, amused everyone.
*September 23, 2013*

**math **

Pat worked 43 hours and received $7.25 per hour for regular pay and time-and-a-half for all hours over 40 hours. What were her weekly earnings?
*September 6, 2013*

**physics**

The drawing shows a uniform horizontal beam attached to a vertical wall by a frictionless hinge and supported from below at an angle θ = 38o by a brace that is attached to a pin. The beam has a weight of 346 N. Three additional forces keep the beam in equilibrium. The ...
*July 16, 2013*

**math**

what is missing number for magic square for 22, 111,72, 131
*July 9, 2013*

**algebra 1**

Graph each rational function;identify the domain and ranges;and compare the graph with the graph y=1/x. 1.y=-10/x 2.y=1/(x+3)+3
*April 24, 2013*

**algebra 1**

Graph each rational function;identify the domain and ranges;and compare the graph with the graph y=1/x. 1.y=-10/x 2.y=1/(x+3)+3
*April 24, 2013*

**calculus**

the telephone company is planning to introduce two new types of executive communications systems that it hopes to sell to its largest commercial customers. It is estimated that if the first type of system is priced at x hundred dollars per system and the second type at y ...
*April 23, 2013*

**Science**

What are some of the effects of the sun's radiation on the earth's atmosphere including the green house effect, conduction, convection and radiation?
*April 10, 2013*

**math**

32 subjects in a study were recruited by advertisements to participate in a study of attitudes and values toward wine. What assumption are you making about these subjects? (I noticed that the problem does not state it is a SRS.)
*April 3, 2013*

**Science**

Describe the apparent motion of the stars and planets that is caused by the revolution and rotation of the earth.
*March 11, 2013*

**math**

where did you get the 2 from ?
*March 1, 2013*

**English**

(Choose the correct answer) i hope/wish i was a bird
*February 28, 2013*

**Chemistry**

two D-glucose monosaccharide units
*December 16, 2012*

**Trigonometry**

Please show me the work so i understand 2. Find the reference angle of -11π/3. 5. If θ = –18°, find the exact value of θ in radians. 6.If θ = 3, find the value of θ in degrees correct to the nearest tenth of a degree. 13.The ...
*December 12, 2012*

**Chemistry**

pls. tell
*November 28, 2012*

**sci**

a car performs 40,000 j of work in 5 sec. what is the power of the car. what is the horsepower?
*November 16, 2012*

**trig**

the pendulum of a grandfather clock is 1.3m long. Determine the length of the arc through which the pendulum moves if it moves through an angle of 15
*November 8, 2012*

**Microecon**

Using the midpoints approach to the cross elasticity of demand-calculate the cross eleasticity the demand for golf at all 3 prices. Price Demand1 D2 D3 50 15 10 15 35 25 15 30 20 40 20 50 D1 -Income $50k per yr, movies $9 D2 -Income $50k -movies $11 D3 -Income $70k -movies $11...
*November 1, 2012*

**Physics**

A current of 4 A flows in a copper wire 10 mm in diameter. The density of valence electrons in copper is roughly 9 × 1028 m−3. Find the drift speed of these electrons. Answer in units of m/s.
*November 1, 2012*

**Physics**

A 63 Ω resistor is connected to a 4.7 V battery a) When the switch is closed, calculate the current I. Answer in units of A. A 7.4 Ω resistor is connected to a 4.7 V battery When the switch is closed, calculate the current I. A 69 Ω resistor is connected to a 4....
*November 1, 2012*

**Physics**

A certain lightbulb has a tungsten filament with a resistance of 28 Ω when cold and 144 Ω when hot. If the equation R = R0 [1 + α ∆T ] can be used over the large temperature range involved here, find the temperature of the fila- ment when it is hot. Assume...
*October 31, 2012*

**physics**

A typical color television draws about 2.8 A when connected to a 145 V source. What is the effective resistance of the T.V. set? Answer in units of Ω.
*October 31, 2012*

**Physics**

A wire with a circular cross section and a resistance R is lengthened to 3.77 times its original length by pulling it through a small hole. After being pulled through the hole, the total volume of the wire is unchanged. Find the resistance of the wire after it is stretched. ...
*October 31, 2012*

**Physics**

A skyrocket explodes 77 m above the ground. Three observers are spaced 106 m apart, with observer A directly under the point of the explosion. Find the ratio of the sound intensity heard by observer A to that heard by observer B. Find the ratio of the intensity heard by ...
*October 21, 2012*

**Physics**

An experiment requires sound intensity 0.942 W/m2 at the distance of 2.7 m in any direction from a speaker. What total sound power is required? Answer in units of W.
*October 21, 2012*

**Physics**

A baseball coach shouts loudly at an umpire standing 3.6 meters away. If the sound power produced by the coach is 2.2×10−3 W, what is the intensity of the sound when it reaches the umpire? Answer in units of W/m2.
*October 21, 2012*

**Physics**

A harmonic wave in a wire has amplitude A = 7.6 mm, wavelength λ = 0.679 m and frequency f = 543 Hz. What is the propagation speed of the wave? Answer in units of m/s. The wire has linear mass density of 5.04 g/m. Determine the wire’s tension. Answer in units of N.
*October 21, 2012*

**Physics**

A harmonic wave is traveling along a rope. It is observed that the oscillator that gener- ates the wave completes 44.9 in 30.4 s. Also, a given maximum travels 436 cm along the rope in 9.4 s. What is the wavelength? Answer in units of cm
*October 21, 2012*

**Physics**

When a particular wire is vibrating with a frequency of 5.3 Hz, a transverse wave of wavelength 69.3 cm is produced. Determine the speed of wave pulses along the wire. Answer in units of m/s.
*October 21, 2012*

**Physics**

The time needed for a water wave to change from the equilibrium level to the crest is 0.4185 s. What fraction of a wavelength is this? What is the period of the wave? Answer in units of s. What is the frequency of the wave? Answer in units of Hz.
*October 21, 2012*

**Physics**

Beth, a construction worker, attempts to pull a stake out of the ground by pulling on a rope that is attached to the stake. The rope makes an angle of 60.9 ◦ with the horizontal. If Beth exerts a force of 116 N on the rope, what is the magnitude of the upward component ...
*October 21, 2012*

**physics**

A gazelle is running in a straight line (the x-axis). The graph in the figure (Figure 1) shows this animal's velocity as a function of time. During the first 12.0 , find the total distance moved
*October 9, 2012*

**o Chem**

The more nonpolar compound will have the higher retention time
*October 9, 2012*

**Physics**

A variable-length air column is placed just below a vibrating wire that is fixed at the both ends. The length of air column open at one end is gradually increased from zero until the first position of resonance is observed at 20 cm. The wire is 115.4 cm long and is vibrating ...
*October 5, 2012*

**Physics**

A length of organ pipe is closed at one end. If the speed of sound is 344 m/s, what length of pipe is needed to obtain a funda- mental frequency of 70 Hz? Answer in units of m.
*October 5, 2012*

**Physics**

The length of a string is 344 cm. The string is held fixed at each end. The string vibrates in two sections; i.e., the string has two antin- odes, and the string vibrates at 130 Hz. Find the wavelength. Answer in units of m. What is the fundamental frequency? Answer in units ...
*October 5, 2012*

**Physics**

To demonstrate standing waves, one end of a string is attached to a tuning fork with frequency 120 Hz. The other end of the string passes over a pulley and is connected to a suspended mass M, as shown. The value of M is such that the standing wave pattern has eight loops “...
*October 5, 2012*

**Physics**

Standing-wave vibrations are set up in a crystal goblet with four nodes and four antin- odes equally spaced around the 26.3 cm cir- cumference of its rim. If transverse waves move around the glass at 900 m/s, an opera singer would have to produce a high harmonic with what ...
*October 5, 2012*

**Physics**

The lowest A on a piano has a frequency of 27.5 Hz. Assume: The tension in the A piano wire (of length 0.51 m) is 305 N, and one-half wavelength occupies the wire. What is the mass of m the wire? Answer in units of kg.
*October 5, 2012*

**Physics**

A harmonic wave is traveling along a rope. It is observed that the oscillator that gener- ates the wave completes 38.9 in 27.4 s. Also, a given maximum travels 432 cm along the rope in 10.6 s. What is the wavelength? Answer in units of cm.
*October 5, 2012*

**Physics**

A variable-length air column is placed just below a vibrating wire that is fixed at the both ends. The length of air column open at one end is gradually increased from zero until the first position of resonance is observed at 20 cm. The wire is 115.4 cm long and is vibrating ...
*October 1, 2012*

**Physics**

explain Lambda? I was sick and missed class?
*October 1, 2012*

**Physics**

A length of organ pipe is closed at one end. If the speed of sound is 344 m/s, what length of pipe is needed to obtain a funda- mental frequency of 70 Hz? Answer in units of m.
*October 1, 2012*

**Physics**

A pipe that is open at both ends has a fundamental frequency of 330 Hz when the speed of sound in air is 333 m/s. What is the length of this pipe? Answer in units of cm. What is the second harmonic? What is the third harmonic? Answer in units of Hz. What is the fundamental ...
*October 1, 2012*

**Physics**

The length of a string is 344 cm. The string is held fixed at each end. The string vibrates in two sections; i.e., the string has two antin- odes, and the string vibrates at 130 Hz. Find the wavelength answer in m What is the fundamental frequency? Answer in units of Hz.
*October 1, 2012*

**Physics**

To demonstrate standing waves, one end of a string is attached to a tuning fork with frequency 120 Hz. The other end of the string passes over a pulley and is connected to a suspended mass M, as shown. The value of M is such that the standing wave pattern has eight loops “...
*October 1, 2012*

**Physics**

A harmonic wave is traveling along a rope. It is observed that the oscillator that gener- ates the wave completes 38.9 in 27.4 s. Also, a given maximum travels 432 cm along the rope in 10.6 s. What is the wavelength? Answer in units of cm.
*October 1, 2012*