Posts by stephen

Total # Posts: 292

chemistry
What will happen if ammonium chloride solution is used to standardize the potassium tetraoxomangate(vii)solution?

Maths
Solve : | x | - 5 > 6

Calculus
Thank you too steve!

Calculus
I think we have a golden answer! Thank you so much for your wonderful help, it means a lot that you'd take the time to help me out and teach me something along the way. I have no idea how I made it to a calculus class without knowing how to solve logarithms, and yet, here ...

Calculus
Thank you very much, you opened my eyes to my error, however I see a slight mistake in your work as well. You got here: dy/dx = (y-1)/(x^2) dy = (y-1)/(x^2) dx dy/(y-1) = x^-2 dx this is all correct, but when you integrate it should be this: ln (y-1) = -1/x + c (because the ...

Calculus
Hello, I would greatly appreciate any help that I can have with the following calculus question below. It has to do with separable differential equations. I'm also going to explain what I've done so far, so please bear with me (but honestly I don't think I've ...

science

social studys
1 IS RIGHT!!!I GOT 100% THX!

Physics
A sphere of radius r =5cm and volume charge density ?=14?C/m^3 spins at ?=200rad/s . What is the magnetic field at the center of the sphere in Tesla?

English
peer pressure destroys character yes or no?.

Math
Students measure the velocity of a car as it races along a track in a clockwise direction. Their measurements are detailed below: Time (sec) | Velocity (in/sec) 0 | 4 1 | 8 2 | 10 3 | 6 4 | 9 5 | 12 6 | 5 7 | 8 8 | 10 9 | 6 10 | 12 Estimate the distance traveled by the car ...

math
The roof of a tunnel is in the shape of a parabolic arch whose highest point is 18m above the road. The road surface is 16m wide. Lights are placed in the tunnel 12 meters high. How far from center of the tunnel are the lights placed?

Calculus
Oh lol, I think I see what we're doing differently. I thought that the first instance that the particle would be at the origin was when t=0 but it really is when t=pi/2. Basically, I substituted the wrong number. Thank you, and I'm sorry for not seeing your point.

Calculus
I believe your equation for velocity is incorrect. In this case V=-sin(sqrt(t))*1/2(sqrt(t))^-1/2 Your equation for velocity is missing raising to the -1/2 power at the end. applying that piece will make velocity undefined at t=0.

Calculus
The Question: A particle moves along the X-axis so that at time t > or equal to 0 its position is given by x(t) = cos(?t). What is the velocity of the particle at the first instance the particle is at the origin? So far I was able to determine that the velocity of the ...

AP Calculus AB
The fence around Wayne Manor (a rectangular plot of land) is going to be replaced. No fence will be required for the side lying along Gotham river. If the new wrought iron fence costs $12 per meter for the side parallel to the river and$4 per meter for the other two sides, ...

science
How many drop (1drop=0.05ml) of 0.20M potassium iodide must we add to 0.010M Pb(NO3)2 to get precipitation of lead iodide to start if Ksp of lead iodide is 7.1x10^-9.

Riddle
Long_short,round_square,good_broken,painted_plaine. What are they.

math
if the three sides of an equilateral triangle are 3x + 2, 2y - X and y + 3. find X and y and the perimeter of the triangle. kindly elucidate further on this question

PHYSICS
Pls help me find the answer

chemistry
when a quantity of powdered sulphur is burnt in excess oxygen, 100cm3 of SO2 were produced at STP CAL,the vol of gas at STD

physics
30m

math
subtract 3x-12/4x^2-8*2x^2-4/9x-36

Physics
I'm having Sig fig troubles. What would 0.98*2040 be using Sig fig rules???

Calculus integrals
LOL are you doing Besner's webwork too?

math
if V(r)=4/3 pir^(3) find (v2r)/(vr)

Statistics
If the the girls are not being replaced (i.e put back in the lot) it would be (16/54)+(15/53)+(14/52)+(13/51) since you're not replacing them, the amount of people inside the group decreases. Now fi the candidates were being replaced, the amount of candidates in total ...

algebra
y=7x

stat
1|3366 2|12334445555666789 3|022223344489 4|237 5|2 The first quartile, if your plot was to be divided equally into 4 quarters, would be from the first point around the 9th point. So for example, if you're staring from the top, you'd add up the points from 1.3-2.4 (The...

Math
(1/2)17+(1/6)= Since a coin has 2 sides, the probability of landing a heads is 1/2, and because there are 17 of them, you multiply the 1/2 by 17. The die is being rolled once so the porbability of rolling a 4 is 1/6. Add them together you get what you need.

Math
Let K(x)= (sin(3x-7)) / (e^x-2) (I'm sorry if it is not clear here, but the denominator in K(x) has the natural number, e, to the power of just x. So "x-2" is not the exponent. "x" is the exponent). The Question: Does K(x) have a horizontal asymptote? (...

English
Alright, I understand. Thank you!

English
Is the word "and" still considered a coordinating conjunction if it is being used in a list rather than to connect two independent clauses? For example: "Jeff wants to buy an apple, a pear, and a banana" Is the "and" used in that sentence still a ...

math
(1/2)x+(3/4)x=(4/3)x+2 solve for x (5/4)x=(4/3)x+2 -(1/12)x=2 x= 2 * -12 x=-24 the number is -24

English
Alright, thanks!

English
Just out of curiosity, is it okay to use the phrase "and so" in a sentence? Like "Johnathan knew that he had to help the boy asking a question on Jiskha. And so, he did just that, and the boy went on to being the happiest boy on earth." I just need to know ...

Math
What I ended up getting was v(t)=3 sin( pi/3 (t- ((4-pi/2)))) -1 so B= pi/3 and C=4–pi/2

Math
Context: The function v(t) represents the velocity of a particle moving along a horizontal line at any time, t, greater than or equal to zero. If the velocity is positive, the particle moves to the right. If the velocity is negative, the particle is moving to the left. The ...

eng 122
Yes

eng 122
Yes, this is a component of writing with an academic voice.

AP Chem help?!!!!
What effect will dissolving larger amounts of salt in a beaker of water have on the concentration and conductivity of the solution? 1. The concentration does not change, but the conductivity increases. 2. Both concentration and conductivity decrease. 3. Both concentration and ...

AP Chemistry help!!!!!
How does the boiling point of ethane (CH3CH3) compare with that of ethanol (CH3CH2OH)? 1. The boiling point of ethane is higher because it has stronger London dispersion forces. 2. The boiling point of ethane is higher because it has stronger dipole-dipole forces. 3. The ...

Math
Thank you.

Math
A hiker started to climb up the hill at 6:00 am and either kept climbing up or rested at some place(s). He reached the top at 6:00 pm. he rested there for the next 12 hours. Next day at 6:00 am, he began to travel down the same path. He either moved downward or rested at some ...

Math
Reiny I believe you have made a mistake, but using the same method, the correct answer would be 1mile (because (1/60)*(60)). But still, thanks for the help.

Math
Thank you for your response, but to clarify, why is "(17+13)" important in the problem?

Math
The question goes as follows: Two trains are moving toward each other at speeds 17 mph and 43 mph. How far apart are they 1 minute before they pass each other? So I have been trying to answer this question for a while now, and it is turning out to be a little harder than I ...

chemistry
what will be formed when oxygen combines with hydrogen in the presence of hydrated iron 3 oxide?

CHEMISTRY
USING DOT (.) AND CROSS (x) DIAGRAM SHOW THE BONDING IN THE COMPOUND FORMED WHEN HYDROGEN AND OXYGEN COMBINE

Geometry
Point $G$ is the midpoint of median $\overline{XM}$ of $\triangle XYZ$. Point $H$ is the midpoint of $\overline{XY}$, and point $T$ is the intersection of $\overline{HM}$ and $\overline{YG}$. Find the area of $\triangle MTG$ if $[XYZ] =150$.

Altitudes $\overline{XD}$ and $\overline{YE}$ of acute triangle $\triangle XYZ$ intersect at point $H$. If the altitudes intersect at a $123^\circ$ angle, and $\angle YXH = 26^\circ$, then what is $\angle HZX$ in degrees?

Math
Thanks Zeriku senpai and please! i got 100

life orientation
They become uncertain hopeless,careles and even lonely becouse of the pressure

math
For the Rule of 78, for a 12-month period, the last term in the sequence is 12 and the series sums to 78. For an 10 month period, the last term is and the series sum is . For a 15 month period, the last term is and the series sum is . For a 20 month period, the last term is ...

physics
a ball of mass 0.1kg is thrown vertically upwards with an initial velocity of 80m/s.calculate the potential energy (I) half way up (ii) at its maximum height.what is the kinetic energy as it leaves the ground

mathematics
A mortgage is taken out of 100000 dollars and is repaid by annual instalments of 20000 dollars. Interest is charged on the outstanding debt at 10 percent annually. If the first repayment is made one year after the mortgage is taken out, find the number of years it takes for ...

Social Studies
Why did the Spanish and French start fighting? Question from Social Studies weekly week 8 for 4th graders.

programming in basic
1 If four statements are entered with the same statement number, the computer will accept the ______ statement with the duplicate statement number first second third fourth 2 ______ is a valid BASIC number? 567890100 200,000 $65 1.05E+09 3 Data provided using the ______ ... chemistry 2.A 3.A 4.C 5. 6. B 7.B 8.B 9. 10. D Maths Change these fractions to twentieths and then arrange them in order of size, smallest first. 7/20 2/5 3/4 7/10 Algebra Simplify. -x^3(1-x^2)^-1/2 -2x(1-x^2)^1/2 ------------------------------- x Do I first start by getting rid of the negative exponents? I do not know where to begin. Please help. Algebra Factor by removing the common factor with the lesser exponent 2x(x-5)^-3 -4x^2(x-5)^-4 I don't really know how to do this. The final answer I got is: 2x(2x^2-10x+1) -------------- (x-5)^4 help The a is supposed to be a square root Algebra t^2/ã(t^2+1) - ã(t^2+1) ------------------------- t^2 Is the final answer -1/t^2 sqrt(t^2+1) Algebra I'm just trying to write it like it appears in the book. (5)^-1/2 * (5x)^5/2 (5x)^-3/2 Simplifies to 1/5 * ã5x^5(1/ã5x^3) How do I get to xã5? I'm confused. I've tried many times. Algebra Simplify 5^-1/2 * 5x^5/2 (5x)^-3/2 My final answer was x/sqrt5 Algebra Solve the complex fraction ((t^2/sqrt t^2+1)-sqrt t^2+1))/t^2 Is the LCD to multiply by sqrt t^2+1????? Please help! Still need help Is the final answer x/sqrt5? Algebra after more simplification I got x^2(sqrt5x)/(sqrt5)(x sqrt5x) can I cancel out the sqrt5x from the denominator and numerator? Algebra 5^-1/2 x 5x^5/2(5x)^-3/2= 1/sqrt5 x sqrt5x^5 x 1/sqrt5x^3= ??? I need to simplify and I need help understanding what the next step is Algebra Rationalize numerator. ((sqrt7)-3/4)(sqrt7+3/sqrt7+3) I got that the answer is 7-9/4sqrt7+12= -2/4sqrt7+12 physics 3125/16 History The 4th amendment says that probable cause must be established for a domestic search warrant. History The best answer is A the 6th amendment. Finance BH Holding Inc. is considering undertaking a capital project, costing$8 million today. in addition, the project will be installed over the next 2 years, costing $1.0 million at the end of the first year and$0.5 million at the end of the second year. thereafter, the project ...

Ummmmm @ Anonymous how are you going to make a phone call home when you don't even have are phone numbers? Huh? Thought so, and you don't know any of us. So uh, your wrong.

math
-5x^2 + 3x^2 = -2x^2 5x - 4x = x 5 -2 = 3 -2x^2+x+3

Math
The numbers that your showing are in increments of 50 and would be shown on your graph as such. If your looking for further breakdown the increments in between would be in 25 units. 50-75-100-125-150-175-200-250-300

Maths
thanks

Maths
i don't have the answer for b

Maths
A football match between United and City is watched by 24 000 spectators. Of the 24 000 spectators, 14 112 support United and 8208 support City. The rest of the spectators are neutrals who support neither team. a.Work out the percentage of the 24 000 spectators who support ...

Maths
thanks i have now done the last 2

Maths

Maths

Maths
22.5%

Maths
In a sale of electrical equipment, the price of all goods is reduced by . Work out the sale price of the following. a A DVD player which normally costs £88 b A portable audio player which normally costs £150 c A laptop computer which normally costs £986

Maths
thanks so the answer is 3.75%

Maths
yes

Maths
Ranee keeps £360 in a savings account for a year. At the end of the year she gets £13.50 in interest.Work out the interest rate on the account.Give your answer as a percentage. What's the answer guys and girls

PHYSICS
1.522j

Chemistry
how many molecules of N2 could fit in a 2.00L soda bottle at 23C and 755mmHg

phy
505k

ss
In what ways can it be argued that the European union caused ww1 and ww2

art
what perspectives are important in understanding a work of art?

Entrepeurnuership
I think its 1

Entrepeurnuership

Entrepeurnuership
which of the following companies is the easiest type to set up sole proprietorship LLC C corporation S corporation

entrepreneurship
I have another

entrepreneurship
thanks

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