Monday

February 27, 2017
Total # Posts: 316

**Math**

A bicycle trail is 7miles and 880 yards long.How many total yards is the bicycle trail

*April 9, 2013*

**CHEMISTRY HELP PLEASE!!**

@DrBob222 so, for the first part I do, Ksp = (Mg^2+)(OH^-)^2 , which is 1.8x 10^-11 = (.0286)(OH)^2 for OH-, i get 2.51 x 10^-5 then, for the second part, I do, Kb = (NH4^+)(OH^-)/(NH3), which is 1.8x 10^-11 = (NH4)(2.51 x10^-5)/(.114) for NH4, i got 8.17x10^-8 mol then I ...

*March 2, 2013*

**CHEMISTRY HELP PLEASE!!**

0.350L of 0.160 M NH3 is added 0.140 L of 0.100 M MgCl2 . How many grams of (NH4)2SO4 should be present to prevent precipitation of Mg(OH)2 (aq) ? The Ksp of Mg(OH)2 is 1.8 x 10–11.

*March 2, 2013*

**math**

$84.00

*February 18, 2013*

**physics**

At the moment car A is starting from rest and accelerating at 5.0 m/s2, car B passes it moving at a constant speed of 45m/s. How long will it take car A to catch up with car B?

*January 17, 2013*

**Chemistry**

1.49 M

*December 7, 2012*

**math**

There are 5 yellow cards, 4 red cards, and 1 purple card. He draws a card at random, replaces it, and draws a second card. What is the probability that both cards will be red?

*November 25, 2012*

**SS8R - paragraph help!**

I think it good.

*November 5, 2012*

**math**

I am not sure but I think it is 50,400 dollars a week. 60 minutes in one hour 24 hours in one day 7 days in week (5x60)=300 300x24= 7200 7200x7=50,400

*November 5, 2012*

**Maths**

x+2x+3x=180 add them. 6x=180 divide 180/6= 30

*November 2, 2012*

**spanish**

dark haired/skinned

*October 29, 2012*

**Health**

Gonorrhea is spread through contact with the ________. A. Anus, Penis, Mouth, Skin B. Penis, Anus, Mouth, Vagina C. Vagina, Skin, Penis, Anus D. Mouth, Penis, Vagina, Fingers I think it's B?

*October 27, 2012*

**p.e.**

a scull is to rowing as a -------- is to yachting.

*October 25, 2012*

**Calculus**

Assuming that f and g are functions differentiable at a (though we do not know their formulas). Prove that f +g is differentiable at a using the definition of the derivative.

*October 15, 2012*

**Physics**

A dog running in the +y-direction at 6.0 hears its owner call from behind, and 2.7 later it's running at the same speed in the opposite direction. Calculate the dog's change in velocity. Calculate the average acceleration

*October 12, 2012*

**Calculus**

F(x)=|x-5| evaluate the following limits lim x->5- ( f(x)-f(5))/(x-5) lim x->5+ ( f(x)-f(5))/(x-5)

*October 10, 2012*

**physics**

A wire tooth brace used by orthodontists. The top-most tooth is protruding slightly, and the tension in the wire exerts two forces at 16 º angle on this tooth in order to bring it back into alignment. If the forces have the same magnitude of 19.5 N, what is the magnitude ...

*September 14, 2012*

**physics**

A 316-kg boat is sailing 12.0° north of east at a speed of 1.60 m/s. 39.0 s later, it is sailing 36.0° north of east at a speed of 4.00 m/s. During this time, three forces act on the boat: a 31.4-N force directed 12.0° north of east (due to an auxiliary engine), a ...

*September 14, 2012*

**Physics**

Two arrows are shot vertically upward. The second arrow is shot after the first one, but while the first is still on its way up. The initial speeds are such that both arrows reach their maximum heights at the same instant, although these heights are different. Suppose that the...

*August 31, 2012*

**Health**

I believe the correct answer is C. increase;reduce?

*August 30, 2012*

**Health**

I put D down and got it wrong.

*August 6, 2012*

**Physics**

A rock is dropped from a sea cliff and the sound of it striking the ocean is heard 3.9 s later. If the speed of sound is 340 m/s, how high is the cliff? i know you use the equation y=(initial velocity)(time) + (1/2)(acceleration)(time^2) but I'm having problems putting all...

*July 2, 2012*

**Science**

What happens to approximately 60% of the energy released during the complete oxidation of glucose? A) It is used to synthesize more ATP. B) It is reused to supply the energy for anabolic reactions. C) It is stored in the body as fat. D) It is lost by the body in the form of heat

*June 21, 2012*

**science**

In a micelle, why do you find the fatty acid chains of the of the phospholipid molecule are on the inside of the bilayer?

*May 26, 2012*

**vulindlela**

I believe that the correct answer is B. Physical activity.

*May 22, 2012*

**Calculus**

How do you use imlicit differentiation to differentiate e^(xy)? I have the problem "use implicit differentiation to find dy/dx. e^(xy)+ x^2 - y^2 = 10. I've gotten to the point whereI have d/dx(e^(xy)) + 2x - 2ydy/dx = 0, but I can't go any further because I don&#...

*May 22, 2012*

**Calculus I**

Okay, thanks guys!

*May 21, 2012*

**Calculus I**

Find the derivative of y=ln((1+e^x)/(1-e^x)) I know that the derivative of y=ln(1+e^x) would be (e^x)/(1+e^x), but I'm not sure what to do with the 1-e^x on the bottom here. Can someone help please? Thanks!

*May 21, 2012*

**Chemistry help PLEASE!!!**

The solubility of AgCl(s) in water at 25 C is 1.33x10^-5 M and its deltaH of solution is 65.7 kJ/mol . What is its solubility at 60.1 C ? Please explain how to solve for this!!

*April 20, 2012*

**fourth grade math**

if two dice are rolled together,which outcome is more likely-dots totaling 12 or dots totaling 7? explain you anser.

*April 12, 2012*

**Math**

Delia works from 8:00 a.m. to 4:30 p.m. and has one hour each day for lunch. How much does she earn for a five-day workweek at $4.80 per hour?

*March 1, 2012*

**social studies**

Were cassette tapes famous when they first came out?

*February 28, 2012*

**math**

Just pick 3 mid sized cars.

*February 20, 2012*

**algebra 2**

The answer is y=2x+7. First put it in point slope form then solve it into slope-intercept form. Use the same slope because having parallel lines means the same slope.

*February 10, 2012*

**biology**

A dominant gene A produces wire-haired texture in dogs. Its recessive aamllele a produced smooth hair. Cross the heterozygous wire-haired dog with homozygous smooth-haired dog. List the genotype and phenotype ratios of all the possible offspring.

*January 21, 2012*

**Geometry**

the answer to this queston is acute! :)

*January 20, 2012*

**physics**

A small cart weighs 15.0 N. If a constant force of 25 N is used to move the cart horizontally across the desk, A] What will be the acceleration of the cart? B]How far will the car move in 1.0 second

*December 12, 2011*

**Physics Help Please**

Issac has to do 1000J of work on a 5kg box, and all the work he did simply went into lifting it above the ground. How high above the ground will the box be when all the work has been done?

*November 28, 2011*

**physics**

a football punter accelerates from rest to a speed of 8 m/s during the time in which his toe is in contact with the ball (about 0.21 s). If the football has a mass of 0.50 kg, what average force does the punter exert on the ball?

*November 20, 2011*

**physics**

a bag of sugar weighs 5.00 lb on earth. What would it weigh in newton on the moon, where the free fall is one-sixth that of the earth?

*November 20, 2011*

**physics**

a 8.0 kg object undergoes an acceleration of 2.2 m/s squared.what is the resulting force acting on it?

*November 20, 2011*

**physics**

a football punter accelerates a football from rest to a speed of 7 m/s during the time in which his toe is in contact with the ball (about 0.18 s). If the football has a mass of 0.50 kg, what average force does the punter exert on the ball?

*November 20, 2011*

**physics**

While exploring a cave, a spelunker starts at the entrance and moves the following distances: 75.0 m north, 225 m east, 160 m at an angle 30.0° north of east, and 150 m south. Find the resultant displacement from the cave entrance.

*October 24, 2011*

**nursing**

What are ways you provide education to patients in your work place regarding chromic diseases?

*October 22, 2011*

**Nutrion**

What types of pathogens? What habits in your food preparation practices do you think might cause these pathogens to grow? What habits can you change in your life to reduce your risk of foodbourne illness?

*October 20, 2011*

**nutrition**

Review the nutrition quality of the items, using what you know about daily values, and ingredients (one of the products must have a health claim). Write a 300-500 word essay on what you have learned.

*October 20, 2011*

**nursing**

List three key staff of a public health department other than the community or public health nurse.

*October 19, 2011*

**Math**

The GCf of my numerator and denominator is 3. I am equivalent to 2/5

*October 16, 2011*

**Spanish-8th grade**

This is in regard to my earlier post about the conversation- Thank you for all your help.Thank you for your patience too Could you recheck this? I don't understand about who talks much-my number 10 but I think you put it at #9You said it was the brother not the person but ...

*October 12, 2011*

**Spanish -Sra Please recheck**

Thank you for all your help.Thank you for your patience too Could you recheck this? I don't understand about who talks much-my number 10 but I think you put it at #9You said it was the brother not the person but I'm confused why it states me and then habla-doesn't...

*October 12, 2011*

**Spanish 8th grade**

I have to read this and answer these questions for homeowrk-I'm not sure if I did this correctly. Could you please check-I put the reading and then questions and my answers under it-thank uyou for checking-I'm really not sure about my answers-I'm a little confused ...

*October 12, 2011*

**Spanish-8th grade**

We're learning direct object pronouns so I had to replace the "sellos" in the first sentence-did I do it correctly? Tú coleccionas sellos. Tú los coleccionas.

*October 12, 2011*

**math**

What is the standard notation for 3 to the 3rd power

*October 3, 2011*

**algebra**

simplify 14a^8y^3-7a^4y^5+28a^12y^2/7a^4y

*June 30, 2011*

**Math-Calc**

The lim as x goes to 0- for cos(x)/sin(x). I know the answer is negative infinity but I don't really understand why.

*June 8, 2011*

**Calculus**

A rectangle is inscribed with its base on the x axis and its upper corners on the parabola y= 12 - x^2. What are the dimensions of such a rectangle with the greatest possible area?

*June 1, 2011*

**Science**

I'm in 6th grade and I need help for my science project. I don't even know what to do. Any fun science projects for 6th graders?

*May 21, 2011*

**lit**

is this sentence punctuated correctly ?My grandfather's favorite quotation is E.E. Cummings's, "The most wasted of all days is one without laughter."

*May 10, 2011*

**physics**

Two charges are separated by a distance d = 5 m. The charge q1 has a charge of q1= 7.0 µC (microcoulombs) and q2 has a charge of q2= 6.8 µC. What is the force between the charges?

*May 1, 2011*

**accounting**

8000

*April 20, 2011*

**Math- Calculus**

Let f be a function such that f(-1)=3 and f'(-1)=6 let h(x)=x^5f(x) evaluate h'(x) at x=-1

*April 19, 2011*

**math**

If the true population standard deviation was known to be 3.0, then approximately what minimum sample size would you need in a simple random sample if you want a 95% confidence interval for the mean to have a margin of error of .5 or less?

*April 14, 2011*

**math**

Find a polynomial f(x) with leading coefficient 1 and having the given degree and zeros. Each polynomial should be expanded from factored form, simplified and written in descending order of exponents on the variable. For example: (x+5)(x-2) should be given as the answer x^2 + ...

*April 12, 2011*

**algebra**

if the discriminant of (5u^2)+bu+2=0 is 41, what are all the values of b

*March 24, 2011*

**6th grade Math**

Thank you!

*March 2, 2011*

**6th grade Math**

9 + 5k = 45 + 2K the sample shows operation S9 to come up with 5K=36+2k assuming subtract 9 from the 45 sample shows K=12 how did they come up with that?

*March 2, 2011*

**geometry**

Find the area of a rectangle that has one side measuring 10 cm. and a diagonal measuring 26 cm.

*February 14, 2011*

**Physics- Exercise 10**

A 500kg pig is standing at the top of a muddy hill on a rainy day. the hill is 100.0m long with a vertical drop of 30.0m. the pig slips and begins to slidedown the hill. What is the pig's speed at the bottom of the hill? Use the Law of conservation of Energy.

*February 3, 2011*

**Physics**

while on the moon, the Apollo astronauts enjoyed the effect of a gravity much smaller than that on earth. if Neil Armstrong jumped up on the moon with an initial speed of 1.51 m/s to a height of 0.700m, what amount of gravitational acceleration did he experience?

*February 3, 2011*

**Chemistry**

I'm sorry I'm just really confused by ionization energies and the heat of formation. Could you explain how to set up this problem? Use the data (kJ) for ionization energies, electron affinities and heats of formation to find the lattice energy of Fe3O2(s) according to ...

*January 27, 2011*

**English**

The forth one is correct and that is it. The other examples are extremely grammatically incorrect.

*December 22, 2010*

**Algebra1**

How would i get the problem to become 3x+5x=17+7...do i add like terms?

*December 12, 2010*

**Algebra1**

0.32

*December 12, 2010*

**Algebra1**

2x-7+x=11-5x+6

*December 12, 2010*

**11th grade**

a rock is dropped from a 20.0m bridge falls into the river below. a.)at whqat velocity does it strike the water? b.)how much time did the rock take to reach the water?

*December 12, 2010*

**physics**

when Chris slams a basketball he has a vertical leap of 1.46 meters. what must his initial vertical velocity be in order for him to reach this height?

*December 9, 2010*

**6th grade**

Thank you very much for your help. I had the same answer. I'm trying to explain the reciprocal to my daughter, she is worried that her teacher will say the answer is wrong.

*December 9, 2010*

**6th grade**

Isn't this a division problem? I have to divide 1-1/2 into two parts.

*December 9, 2010*

**6th grade**

I was told that when dividing a mixed number you write the reciprocal of the second number and then multiply and that will change the answer.

*December 9, 2010*

**6th grade**

What steps do we use to change 1-1/2 cups in half?

*December 9, 2010*

**Chemistry**

What is the ionization energy (in kJ/mole) of the hydrogen-like ion F8+ ?

*December 5, 2010*

**Math**

estimate a 15% tip on a $42.65 check

*November 20, 2010*

**Algebra**

Write the equation of the prpendicular bisector of the line segment AB with endpoints A(1,1) and B(7,5). Write the answer in slope-intercept form.

*November 18, 2010*

**math**

Write the equation of the perpendicular bisector of the line segment AB with endpoints A(1,1) and B(7,5). Write your answer in slope intercept form.

*November 16, 2010*

**economics**

Can you help me describe National Debt in 2 paragraphs?

*November 15, 2010*

**Chemistry**

Based on the balanced equation, C2H4 + 3O2 → 2CO2 + 2H2O calculate the molecules of H2O formed when 135 molecules of O2 are reacted.

*November 7, 2010*

**Chemistry**

three different liquids are used in a manometer. (a) derive an expression for P1-P2 in terms of ro(a), ro(b), ro(c), h1, and h2 (b) suppose fluid A is methanol, B is water, and C is a manometer fluid with a specific gravity of 1.37; pressure P2=121.0 kPa; h1=24.0 cm. Calculate...

*November 7, 2010*

**Social studies**

What were the economic, political, and social aspects of New Netherland, New Spain and New France?

*October 17, 2010*

**math**

A department contains 12 men and 17 women. How many ways are there to form a committee with 6 members if it must have strictly more women than men? It is strongly recommended that you do this on paper! how do i solve this in the calculator?

*October 10, 2010*

**Physical chemistry**

100g of water at 30.0C is mixed with 150g of water at 85.0C. What is the final temperature of th mixture assuming no heat is gained or lost during the mixing process?

*October 10, 2010*

**Physics Please Help**

convert grams into kilo grams: 95/1000 = .095 kg x = sqrt MV^2/k x = sqrt .095(3.4)^2/70 x = .12525 x = .13 m x = 13 cm

*October 7, 2010*

**College Chemistry**

Balance this equations for redox reactions in basic solution. Fe(OH)3(s) + OCl- ¨ FeO42- + Cl-

*September 23, 2010*

**college**

Pretend the program in Senegal had been reducing infant mortality at a rate of 11 % per year. How long would it take for infant mortality to be reduced by 39 %?

*September 21, 2010*

**math**

write the multiplication/division fact family for 2, 7, and 14.

*September 14, 2010*

**physics**

heather and Matthew walk with an average velocity of .89 m/s eastward. it takes them 44 min to walk to the store. what is their displacement?

*September 1, 2010*

**Business**

compensation plans, this book calls it pay plan.

*July 7, 2010*

**Business**

why do small businesses need a pay plan?

*July 7, 2010*

**math 5th grade**

theo's bedroom measures 12 3/4 ft by 9 2/3 ft.

*June 3, 2010*