Wednesday

July 30, 2014

July 30, 2014

Total # Posts: 1,666

**Algebra 2**

a rectangle table is five times as long as it is wide if the area is 245 feet ^2 find the length and width of the table

**chemistry**

How much Fe++ could be present in water containing 0.8 x 1e-02 M HCO3- (bicarbonate) without causing the precipitation of FeCO3 (Ksp=10**(-10.7))

**Chemistry**

nevermind..i got it

**Chemistry**

Magnesium fluoride dissolves in water to the extent of 8.0 10-2 g/L at 25°C. Calculate the solubility of MgF2(s) in moles per liter, and calculate Ksp for MgF2 at 25°C. I've been doing this and getting .086. Please help!

**Algebra**

Write an equation of the line satisfyingg the given conditions. Slope = -2/3; y-intercept of 2

**Math (trig)**

4cos(x)+5=6sec(x)

**Algebra**

Determine whether the lines are parallel, perpendicular, or neither. y = 9x + 9 and y = -9x + 9

**Algebra**

Write an equation of the line satisfying the given conditions. Horizontal line through (-2, -5)

**Math**

Thanks, I am so lost.

**biology**

Pick one of the multiple choice that best matches the answer. For grasshoppers and locusts to be in the same family they must also be in the same a. order b. group c. genus d. species two members of the same ___ would be most clostly related. a. order b. group c. genus d. species

**spanish**

what is the conjugation for I listened He use to take I slept

**Economics **

Programs aimed only at people who are poor or disabled are known as? a. social insurance programs b. governmental programs c. federally funded programs d. public assistance programs

**PreCalculus REINY HELP PLEASE**

well yay thanks for the answer but i really need the formula lol I tried to derive it on my own but it was a little bit rough lol i need the formula it wasn't in my book and I don't know what the name of the formula would be so i can't really google it...

**PreCalculus**

Hi im unsure how do this problem becasue I do not how to go about these types of problems were you make monthely payments each month of the same amount... Janene contributes $50 per month inot the Chaing China Bond Fund htat earns 7.26% annual intrerest. What is the value of H...

**Precalculus**

Hi im unsure how do this problem becasue I do not how to go about these types of problems were you make monthely payments each month of the same amount... Janene contributes $50 per month inot the Chaing China Bond Fund htat earns 7.26% annual intrerest. What is the value of ...

**PreCalculus**

Still need help please post in this one that way i don't have to search through the old stuff h t t p : / / w w w . j i s k h a . c o m / d i s p l a y . c g i ? i d = 1 2 7 2 3 2 6 8 8 0

**Precalculus**

please still stuck h t t p : / / w w w . j i s k h a . c o m / d i s p l a y . c g i ? i d = 1 2 7 2 3 2 6 8 8 0

**PreCalculus**

Hi i don't know how to do this problem solve for n^3 given that log(40 SQRT(3))/log(4n) = log(45)/log(3n) Thanks i'm copletely lost and don't know how to solve

**PreCalculus**

question skipped again please post response in this one so that way I don't have to search for old posts h t t p : / / w w w . j i s k h a . c o m / d i s p l a y . c g i ? i d = 1 2 7 2 2 4 7 5 4 8

**Precalculus**

please post response in this forum so i don't have to search for the old one u skipped this question still need help h t t p : / / w w w . j i s k h a . c o m / d i s p l a y . c g i ? i d = 1 2 7 2 2 4 0 9 7 0

**PreCalculus**

Hi im unsure how do this problem becasue I do not how to go about these types of problems were you make monthely payments each month of the same amount... Janene contributes $50 per month inot the Chaing China Bond Fund htat earns 7.26% annual intrerest. What is the value of H...

**human resources**

How can a technology manager help their company to grow?

**chemistry**

How do you find out how many moles of water were produced in this reaction?

**chemistry**

How many moles of acid were present in 50 ml or 1.0M HCl? How many moles of water were produced in this reaction?

**mathematics in our world**

how often do you run red lights

**math **

surface area of a rectangular prisms i have one with the same # on each side how many times should i * it

**band**

i play the clarinet i was just wondering if anyone knew any good website to practice

**band**

can you give some music leaning site

**Probability/Stas**

does that mean sixty of them

**Probability/Stas**

10 20

**math**

i have to find the suface area of rectangular prisms here is the problem 9*2.1 2.1*4.4 4.4*9 i got 135.48 is that right

**4th grade math**

4x27

**Spanish**

El Laberinto del Fauno Guillermo del Toro Escribe 3 -4 frases para cada pregunta. Responde a dos preguntas en español, y a dos preguntas en inglés. i need help answering these questions in spanish? 1) ¿Están enamorados el capitán y la madre d...

**Precalc**

I think it was skiped can you post resposne in this question h t t p : / / w w w . j i s k h a . c o m / d i s p l a y . c g i ? i d = 1 2 6 9 8 2 9 1 7 1

**PreCalc**

[b]1. The problem statement, all variables and given/known data[/b] The average growth rate of the population of a certain city is 7.5% per year. The city's population is now 22,750 people. What is the expected population in 10 years? [b]2. Relevant equations[/b] I was alw...

**axia**

how do social dominance and courtship diplays have an impact on evolution

**social studies**

6th grade question:what were greek city-states and how did they function

**japanese**

How would you say: next month on April 14th I am going with my parents on vacation to Hawaii. In katakana and hirgana only please.

**Math-Rational #'s**

Just trying to understand this. Please let me know if I did these right. Thanks!!! -7 as a rational # = -7/10 -3.03 as a rational # = -33/10 -2 3/12 as a rational # = -25/12 1.03 as a rational # = 13/10

**Statistics**

A die that is fair will have each face of the die come up one-sixth of the time in the long run. The population for die throwing contains the results of throwing the die an infinite number of times. For this problem, the parameter of interest is p is the probability of rolling...

**Statistics**

A student group claims that first-year students at a university must study 2.5 hours (150 minutes) per night during the school week. A skeptic suspects that they study less than that on the average. A class survey finds that the average study time claimed by 269 students is = ...

**Physics**

A person walks 24.0° north of east for 2.80 km. How far would another person walk due north and due east to arrive at the same location?

**PreCalculus**

I'm unsure how to even start this problem Solve for x: Arctan( -4/5 ) + Arcos (2/SQRT(5) ) = Arctan(x)

**college english**

that's helps a whole lot! thanks so much Ms Sue and Writeacher! :D

**college english**

In the essay, I have to demonstrate that I recognize logical fallacies, but I don't understand how I can write that much about a message of somebody else when they have written so little. there's just nothing else to speak of, and I only have 500 words

**college english**

what do you mean by newspaper's op ed page?

**college english**

I was told in class to find a piece of "biased writing" and use the knowledge about critical thinking. how would i know whether an article is biased? really confused. also, it's a 1000 word essay, so it'd be really nice to get answer!

**Physics (Heat Engines)**

wait no the answer is A how though?

**Physics (Heat Engines)**

21. A heat engine operates in a cycle between temperatures 700 K and 400 K. The heat input to the engine during each cycle is 2800 J. What is the maximum possible work done by the engine in each cycle? (A) 1200 J (B) 1600 J (C) 2100 J (D) 2800 J (E) 4400 J I believe that the a...

**Math**

yes, it does! Thank you!

**Math**

zero

**Math**

suppose the temperature is -12 degrees F and rises 4 degrees every hour for 3 hours. What will the temp b then? Can you please help me write out the equation? Thanks

**pre calc **

A ramp leading to a freeway overpass is 470 feet long and rises 32 feet. What is the angle of inclination of the ramp?

**Physics 103**

How do I start? Problem: A helium nucleus (m= 6.65 x 10^-27 kg and q = 2e)is initially at rest. It is accelerated through a potential difference delta V and then enters a region with a constant magnetic field of strength B= 4T. It enter perpendicular to the field and undergoes...

**Physics 103**

So I have a question about magnetism. A charged particle moves through a region of space and experiences no magnetic force. Does that mean that the magnetic field is zero?

**math**

i have the capacity of 1 literbut all the water in the ocean can not fill me up.what am i?

**Chemistry**

Bromine can be added to limonene to create a brominated compound. When 613 mg of limonene and 3.5 mL of a 10% (v/v) solution of Br2 in dichloromethane (a solvent) are combined, 959 mg of the product is isolated. Calculate the percent yield for this reaction. If the limonene re...

**Physics**

h t t p : / / i m g 7 1 5 . i m a g e s h a c k . u s / i m g 7 1 5 / 2 7 6 9 / c a p t u r e q u . j p g I need help with c. for a. I got v = sqrt(2gR) for b. I got v = sqrt(gR) for c. I'm stuck

**RESPONSE to PreCalc**

I like how Jishka adds random symbols to my posts lol awsome :O

**RESPONSE to PreCalc**

Makes complete sense thank you so much!!! My only question is how come we respect domains only sometimes... For example now sin©¬/cos©¬ = (1/a)/(¡î3/a) = 1/¡î3 tan©¬ = 1/¡î3 ©¬ = 30¨¬ or pi/6 then ...

**Precalculs**

I have no idea how to do these type of problems. -------Problem-------- Solve each equation on the interval 0 less than or equal to theta less than 2 pi 42. SQRT(3) sin theta + cos theta = 1 ---------------------- There is an example prior to the excersises that attempts to ex...

**Physics**

h t t p : / / i m g 2 0 5 . i m a g e s h a c k . u s / i / c a p t u r e b b . j p g / i am stuck on part c how do i find work with out using the spring constant work equals force parallel times displacement at which the force is acted during... Work done by spring = .5 kx^2 ...

**Math--Exponential Functions**

Suppose an investment of $500 doubles in value every 15 years. How much is the investment worth after 30 years? After 45 years? please help!!! i don't even understand how to approach this problem! =(

**Physics **

hmmmmmm thanks

**Physics **

h t t p : / / w w w . j i s k h a . c o m / d i s p l a y . c g i ? i d = 1 2 6 7 3 9 3 5 9 3 ok heres the problem in a picture h t t p : / / i m g 1 9 2 . i m a g e s h a c k . u s / i m g 1 9 2 / 4 5 0 0 / c a p t u r e x x w . j p g ok I called the 4 kg block m3 and the 2 k...

**Physics**

wait no 12 N

**Physics**

Is C just 9.8 N

**Physics**

Three blocks of masses 1.0, 2.0, and 4.0 kilograms are connected by massless strings, one of which passes over a frictionless pulley of negligible mass, as shown above. Calculate each of the following. a. The acceleration of the 4 kilogram block b. The tension in the string su...

**physics help **

is it no damping for all of them

**physics help **

f(x)=squareroot5cos1.2x f(x)=xsin4x f(x)=x^3sin5x

**physics help **

Damped Oscillations 1. (a) For each of following graphs, determine if graph shows damped oscillation. (b) if it shows damped oscillation : (i) identify damping factor (ii)where damping occurs Note : use a graphing calculator to sketch these graphs f(x) = ¡î5 cos 1....

**5th grade**

that is languages arts

**reading/science**

i really suck at spelling

**reading/science**

we have to readsearch in the plants i have the the plant uranus and i'm wondering if you can give me some websites

**math**

2

**social studies**

is it new brunswick,quebec,prince edward island,and ladrodor and thank you ms.sue

**social studies**

the great plains of canada are found in the canada provinces of

**social studies**

the appalachian mountain extend north from the united states into the canadian provinces of ______,______ ______,______ _____ _____,and _______

**Earth Science**

Upon what measurement is the Earth's latitude and longitude system based?

**pre calc need help**

A square is drawn inside a square. Find the area of the square as a function of the radius of the circle

**ALGEBRA**

the value, v, of a shopkeeper's inventory software program is given by v = 1/2t + 6, where t is the number of years since the shopkeeper bought the program. What is the program worth 4 years after it is first purchased? Plot the point with the given t-value, 4

**Biology**

why did the nuclei enriched fraction appear in the centrifuge fraction spun at the slower speed? Why didn't this fraction contain only nuclei(Why wasn't it pure?)?

**Economics**

This chart shows the components of nominal GDP for the years 2000 and 2001. All figures are in billions of current dollars. -------------------------------------------------------------------------------- Components 2000 2001 ---------------------------------------------------...

**Precalculus**

I hope that the back of the book is wrong the back of the book tells me that the answer is - SQRT(5)/5 I get positive square root( 5) divided by 5 can you tell me if the answer is positive or negative if it is negative can you please explain why? Thanks! tan (theta) = 4/3, pi ...

**College Physics**

You have 20 and 80 (unit is the upside down U) resistors in a circuit with a 100 V battery. A)These resistors are parallel. Find the current through each resistor and the voltage drop across each resistor. B) These resistors are connected in series. Find the current through ea...

**College Physics**

It worked! :D

**College Physics**

The power dissipated by a light bulb increases by 50 W when the potential difference applied across the light bulb increases from 50 V to 100 V. Find the resistance of the light bulb.

**College Physics**

Thanks for the help! And BTW, I am not switching my name.

**College Physics**

How do I solve this problem: A particular wire has a current of 10A. A) How many electrons pass a fixed point every 5 seconds? B)If a wire has a radius of 2 x 10^(-3) m and the electron drift speed is 2.63 x 10^(-5) m/s, determine the number density of electrons in the wire. T...

**spanish 2**

i have to use 10

**spanish 2**

I need help with making an comic strip with 10 verbs in sentences that are in past tense. Any ideas how to start it??

**PreCalculus**

Hi I need some assistance on this problem find the exact value do not use a calculator cot[(-5pi)/12] Here is my attempt RT = square root pi = 3.14... cot[(-5pi)/12]={tan[(-5pi)/12]}^-1={tan[(2pi)/12-(8pi)/12]}^-1={tan[pi/6-(2pi)/3]}^-1={(tan[pi/6]-tan[(2pi)/3])/(1+tan[pi/6]ta...

**math**

how do you graph x^2+4x-1

**spanish 2**

How do you say these sentences in spanish in past tense. The dog took the letters to the mailbox. The dog is driving to the mailbox. The dog is reading the letter.

**Statistics **

Please post your response in this question here is my original question that didn't get answered. h t t p : / / w w w . j i s k h a . c o m / d i s p l a y . c g i ? i d = 1 2 6 4 5 5 3 7 3 0

**Statistics**

I don't mind you showing me the caluclator key strokes to do this or show me the mathematical way whice ever thanks Here is a simple probability model for multiple-choice tests. Suppose that a student has probability p of correclty ansering a question chosen at random form...

**pre calc**

so what will be the solution

**pre calc**

find delta in each of the following case: tan delta=-0.75

**pre calc**

express the followinf trig functions in terms of an acute angle. (a) cos 143 degrees (b) tan 192 degrees

**spanish 2**

Which question is addressed to "usted" (talking to someone with formal respect)? Con quien hablaste? ¿De qué hablaste? ¿Cuánto tiempo estuviste en el teléfono? Que compraste en la tienda? ¿Que hiciste después ¿T...

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