Thursday

March 5, 2015

March 5, 2015

Total # Posts: 179

**statistics**

Let x denote the time taken to run a road race. Suppose x is approximately normally distributed with a mean of 190 minutes and a standard deviation of 21 minutes. If one runner is selected at random, what is the probability that this runner will complete this road race in 225 ...
*December 5, 2014*

**eng**

which one of the following fragments is a prepositional phrase
*November 24, 2014*

**chemistry**

Calculate the volume of 1.00 M acetic acid solution and mass of sodium acetate needed to make 250 mL of a 0.450 M acetic acid/acetate buffer solution with a pH of 4.00. (The pKa is 4.74 for acetic acid).
*November 3, 2014*

**Physics**

A car travels in the +x-direction on a straight and level road. For the first 5.00s of its motion, the average velocity of the car is V = 7.11m/s . How far does the car travel in 5.00s ? Thank you!
*September 7, 2014*

**Economics**

What role should our government play in Price Ceilings and a Price Floors?
*June 1, 2014*

**Chemistry **

Give the half equations at the anode and cathode for a dilute hydrochloric acid,dilute copper chloride solution and the concentrated magnesium solution.
*May 18, 2014*

**Chemistry **

Show the half equations at the anode and cathode for an electrolysis of concentrated magnesium chloride solution using inert electrode
*May 18, 2014*

**Geometry**

Find the area. A rectangle with sides of lengths 4/5 foot and 1/2 foot
*April 8, 2014*

**Chemistry**

How much ice (in grams) with the temperature of 0∘C would have to melt to lower the temperature of 355mL of water from 26∘C to 4∘C? (Assume the density of water is 1.0 g/mL.)
*April 7, 2014*

**Chemistry**

In a coffee cup calorimeter, 1.60 g of NH4NO3 is mixed with 75.0 g water at an initial temperature of 23.50 ºC. When the salt was completely dissolved, the solution temperature of the calorimeter became 21.80 ºC. Assume the solution’s specific heat capacity is 4...
*March 10, 2014*

**Chemistry**

A 3.68 g sample of solid gold is heated from 24 ºC to 34 ºC. How much energy (in joules and calories) is required? Thank you!
*March 7, 2014*

**Chemistry**

A mixture of gases is made up 0.48 mol of Ar and 0.94 mol of N2 with a total pressure of 1.68 atm. What is the partial pressure of Ar?
*March 4, 2014*

**algebra**

a scarf was cut into 6 pieces, each with a length greater than 5 inches. How long could the original scarf have been?
*February 9, 2014*

**Chemistry**

1.9
*January 27, 2014*

**Math**

Simplify the expression completely. -15m^3 z^5 / -4m^4 z^2
*January 21, 2014*

**Healthcare**

Suggest an organizational strategy that you think would be effective for a health care organization. Recommend a key HIT tactic that would support the implementation of the strategy selected. Justify your response. •Analyze the role of a CEO or CIO in a health care ...
*January 15, 2014*

**math **

Randy had a sheep that started eating more and more as each day passed.On July 1,Randy’s sheep ate 5 carrots. On July 2,Randy’s sheep ate 11 carrots. On July 3, the sheep ate 18 carrots. How many carrots will the hungry sheep eat on July 30th?
*September 17, 2013*

**Physics**

yes
*June 12, 2013*

**math **

1. If 96% of Chinese couples have one child (which is female 50% of the time), and the remaining 4% of Chinese couples engage in sex-selective abortion until they have a male child, what is the ratio of females per 100 males among the children (to the nearest whole number)?
*March 18, 2013*

**chemistry **

draw the conformational structures is 2-methylpentane?
*March 15, 2013*

**chemistry**

what is the IUPAC name for CH3CH2C(CH3)2CH2CH(CH3)2?
*March 15, 2013*

**Geometry**

The Z company specializes in caring for zebras. They want to make a 3-dimensional "Z" to put in front of their company headquarters. The "Z" is 15 inches thick and the perimeter of the base is 390 inches. What is the lateral surface area of this "Z"?
*March 12, 2013*

**Geometry**

A rectangular poster measures 42 inches by 26 inches. A frame shop fitted the poster with a half inch mat border
*March 7, 2013*

**Geometry**

The height of a parallelogram is 5 feet more than its base. If the area of the parallelogram is 204 square feet, find its base and height.
*March 6, 2013*

**Math 1033**

Job 1: Donivan Tech offered this girl a job at $50,310 a year at 45 hrs a week, traveling 45 miles a day. She estimates 15% of her gross pay. what is her weekly pay before deductions or expenses?
*February 13, 2013*

**alg 150 help**

the width of a rectangle is 9 less than twice the length. if the area os the rectangle is 41cm^2 what is the length of the diagonal?
*February 10, 2013*

**alg 150 help**

X^2+8X-4=0 what are the 2 answers?
*February 10, 2013*

**Chemistry 3A**

I am doing the same problem. I got as far as you, including: DF = C2/C1 = 10 mM /500mM = 0.02 EDTA V1= DF x V2 = 0.02 x 300mL = 6 mL ...Now i am not sure what to do with this information. I would appreciate the help.
*February 1, 2013*

**Chemistry**

Given the following data: S(s) + 3/2 O2(g)-->SO3(g) ∆H = -395.2 kJ 2SO2(g) + O2(g) -->2SO3(g)∆H = -198.2 kJ Calculate ∆H for the reaction S(s) + O2(g) --> SO2(g) Could someone please tell me how you would go about doing this type of problem?
*January 22, 2013*

**math150**

256x^8+30=31 how do i get rid of the x^8 (can someone show me the steps please)
*January 20, 2013*

**150 math**

solve the equation for m 81m^4+54=70
*January 20, 2013*

**math150**

[((5x^8)/(4y^7))^5]*[(4^4y^2)/(5^2x^-2)]
*January 20, 2013*

**math150**

solve for d (p/(d+b))=(g/d)
*January 19, 2013*

**marh 150 help**

simplify 2x^7-9x^7 and 80 dollar shirt 30% off = ? (how do i put this together)
*January 16, 2013*

**geometry**

Marcia is 1.5 meters tall. She casts a shadow that is 2 meters long. A nearby building casts a shadow that is 24 meters long. How tall is the building? (Hint: Use the properties of similar triangles.) A. 48 m B. 36 m C. 18 m D. 7 m
*January 7, 2013*

**math**

the circumference of a circle is 4 inches. Find the radius and area..
*November 30, 2012*

**Engineering**

If you have a 300 ohm transmission line terminated with an antenna that presents a (400 ohm - j 600 ohm) load impedance: What is the normalized load admittance? (I come up with 1.5 - j 2 but am uncertain if correct) How far from the load should a short circuit stub be placed ...
*November 10, 2012*

**Discrete Math**

A bag contains 4 red, 6 white and 9 green marbles. How many ways can 3 red, 2 white and 1 green marbles be selected? Do you used permutation or combination, give your reasoning.
*October 22, 2012*

**chemistry**

why is the bond length an average rather than a fixed number ?
*October 21, 2012*

**chemistry**

how many moles of Nitrogen are in 80g of N2O?
*October 13, 2012*

**chemistry**

thanks
*October 13, 2012*

**math**

you are taking a 10 question essay test. How many ways can you answer the test?
*September 29, 2012*

**MATH**

I NEED HELP UNDERSTANDING HOW TO WRITE AN ALGEBRAIC EXPRESSION FOR EACH WORD PHRASE. 11. 1 MORE THAN THE QUOTIENT OF 5 AND n.
*September 10, 2012*

**chemistry**

a magnesium (Mg) atom with a mass number of 25 contains ?
*September 9, 2012*

**chemistry**

calculate the density of a liquid if 47.9mL of it has mass of 49.06g
*September 2, 2012*

**Calculus**

Which is the standard form of the equation with p = 26, O=3pi/4 ? the O before the =3pi has a diagonal slash through it.
*May 9, 2012*

**Calculus**

Write the equation 4x + 5y – 3 = 0 in normal form. Then, find the length of the normal and the angle it makes with the positive x–axis.
*May 8, 2012*

**Calculus help~!**

this makes no sense to me either!!
*May 8, 2012*

**math**

5000
*May 3, 2012*

**physics**

Ha HAHAHAHAHA LOL
*February 16, 2012*

**physics **

A harmonic wave is traveling along a rope. The oscillator that generates the wave com- pletes 46.0 vibrations in 26.5 s. A given crest of the wave travels 351 cm along the rope in a time period of 12.5 s. What is the wavelength? Answer in units of m
*February 16, 2012*

**Physics**

angel i hate u bro plz help me out
*February 16, 2012*

**chemistry**

Yellow colors in fireworks are die to the 589 nm radiation of sodium ions. a.) How much energy is given off by one photon of sodium?
*February 14, 2012*

**chemistry**

The blue color of the sky results from the scattering of sunlight by air molecules. The blue light has a frequency of about 7.5 * 10^14 Hz. What is the wavelength of this radiation in nanometers?
*February 14, 2012*

**math pre algebra **

a kennel owner is buying a new building he want the space for each dog run to be at least 96 square ft the area reserved for the dog ru.s is 30 ft by 60 ft
*January 31, 2012*

**Physics**

1. The problem statement, all variables and given/known data A point charge is placed at each corner of a square with side length a. The charges all have the same magnitude q. Two of the charges are positive and two are negative, as shown in the following figure. The two ...
*January 22, 2012*

**Physic**

A plane is traveling at 90 miles per hour due south. What do we know about it? the speed, its velocity or both its speed and its velocity?
*January 14, 2012*

**Physics**

14m/s
*January 10, 2012*

**Math**

What is the antisymmetric relations on the set {0,1}?
*November 18, 2011*

**Physics**

A 4.40-kg model rocket is launched, shooting 53.0 g of burned fuel from its exhaust at an average velocity of 650 m/s. What is the velocity of the rocket after the fuel has burned? (Ignore effects of gravity and air resistance.)
*November 10, 2011*

**Physics**

A 4.40-kg model rocket is launched, shooting 53.0 g of burned fuel from its exhaust at an average velocity of 650 m/s. What is the velocity of the rocket after the fuel has burned? (Ignore effects of gravity and air resistance.)
*November 10, 2011*

**Physics**

A 4.40-kg model rocket is launched, shooting 53.0 g of burned fuel from its exhaust at an average velocity of 650 m/s. What is the velocity of the rocket after the fuel has burned? (Ignore effects of gravity and air resistance.)
*November 10, 2011*

**Physics**

A 4.40-kg model rocket is launched, shooting 53.0 g of burned fuel from its exhaust at an average velocity of 650 m/s. What is the velocity of the rocket after the fuel has burned? (Ignore effects of gravity and air resistance.)
*November 10, 2011*

**physics**

A 2.5-kg block slides down a 17.0° inclined plane with constant acceleration. The block starts from rest at the top. At the bottom its velocity reaches 0.70 m/s. The length of the incline is 1.7 m. What is the acceleration of the block? What is the coefficient of friction ...
*November 1, 2011*

**physics**

A 5.6-kg bowling ball is accelerated from rest to a velocity of 17 m/s as the bowler covers 5.0 m of approach before releasing the ball. What force is exerted on the ball during this time?
*November 1, 2011*

**Physics PLEASE HELP**

A 50-kg crate is pulled across the ice with a rope. A force of 100 N is applied at an angle of 38° with the horizontal. Neglecting friction, calculate the acceleration of the crate AND the upward force the ice exerts on the crate as it is pulled.
*November 1, 2011*

**Physics**

A coin is placed on a stereo record revolving at 33 1/3 revolutions per minute. (b) Find the acceleration of the coin when it is placed 5.0, 10, and 15 cm from the center of the record. 2 ____ . m/s2 (5.0 cm) 3 ____ . m/s2 (10 cm) 4 ____ . m/s2 (15 cm)(c) What force ...
*October 19, 2011*

**Phyics**

Sue is swinging a yo-yo around her head. What happens to the size of the centripetal acceleration if the mass of the yo-yo is doubled without changing the period or length of the string?
*October 19, 2011*

**Geometry**

Then what do I do with 6x+7 = 18x-4
*October 16, 2011*

**Geometry**

Given b is the midpoint of AC. AB=6x+7 and BC is 18x-4 what is the length of AB BC AC
*October 16, 2011*

**physics**

Janet jumps off a high-diving platform with a horizontal velocity of 3.5 m/s and lands in the water 1.7 s later. How high is the platform, and how far from the base of the platform does she land?
*October 12, 2011*

**physics**

A boat heads directly across a river 39 m wide at 3.9 m/s. The current is flowing downstream at 2.4 m/s. (a) What is the resultant velocity of the boat? m/s (magnitude) ° (direction) (b) How much time does it take the boat to cross the river? s (c) How far downstream is ...
*October 4, 2011*

**physics**

An airplane flies toward 124° at 525 km/h. What is the component of the plane's velocity (a) toward 90°? km/h (b) toward 180°? km/h
*October 4, 2011*

**physics**

While flying due east at 130 km/h, an airplane is also carried northward at 41 km/h by the wind blowing due north. What is the plane's resultant velocity? (Draw vector diagram to solve problem.) Magnitude km/hDirection (north of east) 72° 18° 18° 72°
*October 4, 2011*

**Physics**

Diane rows a boat at 8.3 m/s directly across a river that flows at 5.6 m/s. (a) What is the resultant speed of the boat? m/s (b) If the stream is 250 m wide, how long will it take Diane to row across? s (c) How far downstream will Diane be
*October 4, 2011*

**physics**

You head downstream on a river in a canoe. You can paddle at 5.2 km/h and the river is flowing at 2.2 km/h. How far downstream will you be in 30 minutes?
*October 4, 2011*

**physics**

thanks
*October 4, 2011*

**physics**

You head downstream on a river in a canoe. You can paddle at 5.2 km/h and the river is flowing at 2.2 km/h. How far downstream will you be in 30 minutes?
*October 4, 2011*

**physics**

You head downstream on a river in a canoe. You can paddle at 5.2 km/h and the river is flowing at 2.2 km/h. How far downstream will you be in 30 minutes?
*October 4, 2011*

**math**

a farmer wishes to enclose a rectangular region with 210 meters of fencing in such a way that the length is twice the width and the region is divided into two equal parts. what length and width should be used?
*September 6, 2011*

**Accounting **

Why do you think the Accumulated Depreciation-Equipment has a zero on the trail balance section?
*August 15, 2011*

**Sentance patterns**

I have to match the following sentances to the sentance patterns listed 1.Visiting old mine shafts can be an interesting experience. 2.Remodeling this house has become very expensive. 3.The old village sprawled across the green valley. 4.Academic success requires diligence. 5....
*July 8, 2011*

**English grammer**

thank you again i answered them again and got 80%
*July 5, 2011*

**English grammer**

thank you for your help what about these questions 8. The Gerrards consider their son a genius Gerrards = subject Consider = verb son = direct object genius = ocject compliment 9. The committee elected George chairman committee = subject elected = verb George = direct object ...
*July 5, 2011*

**English grammer**

I need to identify the subject, verb, and any complements (direct object, indirect object, subject complement, objective complement) and the prepositional phrases of the following sentances. I thought i had them more or less right but when i turned them in i got 59% and i dont...
*July 5, 2011*

**math**

solve for x 2ax+b=c
*June 12, 2011*

**math**

Perdict how many times the cube will land on the letter c if u toss the cube 30times ?
*April 25, 2011*

**MATH**

THERE ARE 3 NALGAS IN A GROUP THERE ARE 3 GROUPS HOW MUCH NALGAS ARE THERE IN TOTAL KEY : USE WORD NALGAS , 3 ,AND GROUPS
*February 28, 2011*

**algebra**

Johnny drove 215 miles from Boston to New York in 4 hours and 15 minutes. What computation will give Johnny's average speed, in miles per hour?
*February 12, 2011*

**math**

there are a group of ducks and goats there are 99 heads and legs among them there twice as many ducks than goats are many ducks and goats are there?
*February 8, 2011*

**trig**

prove the identity sec^2x times cot x minus cot x = tan x
*February 4, 2011*

**geometry**

the diagonals of a rectangle are 8 units long and intersect at a 60 degree angle. Find the dimensions of the rectangle?
*January 27, 2011*

**History**

Hello can someone please help me with this question. 10. All of the following are correct about nineteenth century Liberalism EXCEPT: (Points: 5) having economic and political components. supporting the idea of civil rights. wanting to limit governmental power. opposing ...
*January 25, 2011*

**fractions- 3rd grade**

Name 2 fractions that are equivalent to 3 4th
*December 15, 2010*

**5th grade**

jen and heather went to lunch. when the bill came, jen discovered she had only$6. luckily, heather had enough money to pay the other part, or three fifths. how much did heather pay? how much was the bill?
*December 13, 2010*

**ipc**

A sailboat is traveling at a steady speed of 13 mph. The force of the wind pushing against the sail is _______ the opposing force of the water resistance.
*December 7, 2010*

**chemistry**

Please write the chemical equation and calculate the reaction enthalpy (or energy) for the total bromination (addition of bromine gas to all double bonds) of 2,3-dimethylbutadiene (if you do not know what 2,3-dimethylbutadiene is, assume C2H4).
*December 7, 2010*

**Chemistry**

A 23.6 molar solution of formic acid (methanoic acid) has a density of 1.16 g/ml. The molar mass of H, C, and O are 1g/mol, 12g/mol and 16 g/mol, respectively. What is the molality of this solution?
*December 7, 2010*

**Chemistry**

40 years ago, the first time a vehicle was driven over an extraterrestrial surface. The Soviet Lunokhod (moon walker) rover covered several miles on the moon, heated at night by a polonium-210 source, which undergoes an alpha decay to lead (Pb) yielding 5058 keV. Assume a ...
*December 6, 2010*

**Chemistry**

Please write the chemical equation and calculate the reaction enthalpy (or energy) for the total chlorination (addition of chlorine gas to all double bonds) of cyclopentadiene (if you do not know what cyclopentadiene is, assume C2H4).
*December 6, 2010*