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Posts by Jacob

Total # Posts: 903

chemistry 12
i got K= (HOBr2)(OH)/(HOBr) 2.0x10^-9 = (x)(x)/0.18M x= 11x10^-6 (OH-) =11x10^-6 (H3O)= 1.0x10^-14/11x10^-6 =9.0x10^-8

chemistry 12
Calculate [H3O+] and [OH-] in 0.18M hydrobromic acid, HOBr(aq), having a K of 2.0x10^-9? I got 9.0x10^-8

chemistry 12
What i got was : a) K = (3.0x10^-6)(0.12)/(0.12)(0.12)= 0.6 b) i got 1.90%

chemistry 12
A) Calculate [OH^-] in a o.12 M solution of hydrazine, H2NNH2(aq), having K of 3.0x10^-6. B) what is the percent ionization of the H2NNH2(aq) I can't get these for the life of mee!

Math
On Friday, Jan hiked in the woods. If she hiked a vertical distance of 60 meters relative to sea level and then down 86 meters, where would she be relative to sea level if she started at 0?

Math
On Friday, Jan hiked in the woods. If she hiked a vertical distance of 60 meters relative to sea level and then down 86 meters, where would she be relative to sea level if she started at 0?

science
why are minerals important and what are 2 examples

ENG
how to write a article review ?

Math
There are one thousdand students in Central High School. Three hundred twenty-eight of the students are seniors. Write the decimal that shows what part of the student body is in the senior class.

math/geometry
A football isnt a sphere

algebra
After m minutes an adult blikns about 10+3times.about how many times does an adult blink in three minutes? in two hours?

math please help me
18n-20 = 36-10n then what is n? please please help me

5th Grade Math
you want to estimate 5.25 - 3.3. why would using front-end estimation and adjusting tell you more about the answer than rounding?

geometry
Given that Vector BD Angle ABC, Measures Of Angle ABC =6x - 12, And Angle = 72 Degres, Which Equations Could Be Used To Find The Value Of X? A - 6x - 12 = 72 B - 1/2 (6x-12) = 72 C - 2(6x - 12 = 72 D 6x - 12= 2(72) Can Anyone Help Me How To Solve Or Help Me On Anything

geometry
Use formulas to find the lateral area and surface area of the given prism. The base of the prism is the rectangle with sides of length 13m and 5m. Show your answer to the nearest whole number.

Math - Calculus
I don't understand? Can you please explain?

Math - Calculus
Find the equation of the non-vertical asymptote. What is the smallest value of x at which f(x) intersects its? -6x^3 + 2x^2 - 9x +3 / -5x^2 +9x - 4 1)Find the equation of the non-vertical asymptote. 2)What is the smallest value of x at which f(x) intersects its non-vertical ...

Chemistry
A sample of nitrogen gas at 298 K and 745 torr has a volume of 37.42 L. What volume will it occupy if the pressure is increased to 894 torr at constant temperature?

English
im english

Reading
Which word from the choices below is described the poem that follows? We start escaping this when we Sing "A-B-C-D-E-F-G." That song is not enough, and yet The first step is the alphabet! a. aristocrat b. illiteracy c. aura d. essence Help if you can

Reading
Woops sorry and thanks lol

Reading
Poem "A Voice," By Pat Mora How do you interpret the speaker's statement that her mother's breath "moves through the family like the wind moves through the trees

Social Studies
What Indian tribe helped Lewis and Clark build a canoe?

Statistics
Use the multiple regression equation to predict a persons salary. Assume that the variable A is the number of years of college. Assume that the variable B is the number of years of experience. Suppose the person has 7 years of college and 3 years of experience. What should ...

physics hw urgent please
show how you would you arrange to find f in terms of v,m and r from four equations below. f=1/t, f=ma,v=2piR/T,a=v^2/R Thanks

chemistry
what are the acids, bases, conjugated nacids and conjugated bases of the equation H2O+H2O->OH-+H3O?

MATHS
i need majer help man

math
find the axis of symmetry f(x)=-2x2-12x+8find the axis of symmetry f(x)=-2x2-12x+8

Algebra
Pauline sells computers on commission. She spends 2 hours on selling a laptop and 1 hour on selling a desktop computer. She works no more than 40 hours per week and routinely sells at least 1 laptop and at least 4 desktops each week. To maximize her income, how many of each ...

Math
Math.. find limit help? Find the given limit. (x→ 1)lim: (square root x-1) + 1

Math
First find the general derivative of f (x) = (√x −1) . Then find the equation of the tangent line to the graph at x = 10.

algebra
Part $30000 is invested at 6% another part at 7% and the remainder at 8% yearly interest the total yearly income from the 3 investments is $2200

algebra
Melinda invested three times as much money at 9% yearly interest as she did at 7%. her total yearly interest from the two investments was 170$ How much did she invest at each rate Thanks !!

Algebra
X+y+z=2200

Algebra
Not really having trouble with this one for some reason

Algebra
Sam invested $1950 part of it at 6% and the rest at 8% yearly interest. The yearly income on the 8% invest was 6$ more then twice the income from the 6% investment. how much did he invest at each rate

Math
Of the first graders who were asked, 1/6 like math best, 2/3 liked reading best, and 12 liked science best. How many were asked their favorite subject?

Math
Of the first graders who were asked, 1/6 like math best, 2/3 liked reading best, and 12 liked science best. How many were asked their favorite subject?

PHYSICS
A space station consists of two donut-shaped living chambers, A and B, that have the radii shown in the drawing. As the station rotates, an astronaut in chamber A is moved 3.18 102 m along a circular arc. How far along a circular arc is an astronaut in chamber B moved during ...

math
what household items come in fourths or halves?

Math
second one

Math
how do you solve: m=a+b/2

science
A cylindrical bottle of oil-and-vinegar salad dressing whose volume is 1/3 vinegar (p=1.01 g/cm^3) and 2/3 oil (p=.910 g/cm^3) is at rest on a table. Initially the oil and the vinegar are separated, with the oil floating on top of the vinegar. The bottle is shaken so that the ...

Physics
two point masses are located in the same plane. the distance from mass 1 to the center of mass is 3.0m. The distance from mass 2 to the center of mass is 1.0m. What is m1/m2, the ratio of mass 1 to mass 2?

Math
how did you get 114???

Math
A circular garden has an area of 25π m2 If the . radius is increased by two meters, and fencing is sold only in one meter sections, how much fencing is needed to keep out the rabbits?

Math
man than i must such at math than...oh well sorry megan .

Math
the percent i think is because in the early days the price wasn't that high or expensive as today. my bad, heres my other, i think, ummm.... to start 10000 so if you add 10000 to 25000= 35000 then, 35000+89000=124000 nest, 124000+265000=389000 i'm guessing the total ...

Math
i'm guessing to Megan that it is 717.7%???

Math
just wondering...

Math
so than... 70's to 80's - 265000 increase 265000/124000=2.137= 213.7% Right?

Math
How do you know how many units are spread between the intervals? (For instance, 120-129, 130-139, units spread by 10) How would we answer this question? Thirty AA batteries were tested to determine how long they would last. The results, to the nearest minute, were recorded as ...

Physics
A ball is attached to one end of a wire, the other end being fastened to the ceiling. The wire is held horizontal, and the ball is released from rest (see the drawing). It swings downward and strikes a block initially at rest on a horizontal frictionless surface. Air ...

Math
What is the difference between a linear and a quadratic model? How do I know which one is good for the graph? :S I know it has to do with equations to find R2

Algebra
Factor completely and then place the factors in the proper location on the grid. 4y2 + 25y + 6

Algebra
Laura has a roll of ribbon. There are 20 yards of ribbon on the roll. What equation can Laura use to find the number of inches of ribbon on the roll

Math
Do you suggest any other topics that has a lot of information?

Math
I was assigned an ISU for Data management. In first part, it requires a thesis (Example: Why do teenagers pay so much for car insurance?), hypothesis and 3 main points to back up thesis. I told my teacher that I wanted to do about death rates, what factors cause death rates in...

Math
Consider every whole number area from 2 square units to 30 square units. For which of these areas is there only one rectangle with whole number side lengths?

Math
Consider every whole number area from 2 square units to 30 square units. For which of these areas is there only one rectangle with whole number side lengths?

Math
Consider every whole number area from 2 square units to 30 square units. For which of these areas is there only one rectangle with whole number side lengths?

accounting
purchases from xavier corporation were incorrectly recorded at 41,000 instead of 14,000. Should we adjust purchases and accounts payable?

Math
Ah, ok thank you!

Math
Thank you! I think I did this before but I forgot... How do you know whether or not to use those formulas in these kind of questions? rearrange formulas? P(A U B) = P(A) + P(B) - P(A and B) and P(A U B) = P(A) + P(B)

Math
Thanks! T___T another question (Last one I promise, lol) The probability of a household subscribing to The Economist is 0.4 while the probability of subscribing to National Geographic is 0.6, and the probability of subscribing to NEITHER magazine is 0.2. What is the ...

Math
If possible, can you help me with this question also? From a group of 10 girls and 10 boys, 10 will be chosen to form a committee. Find the probability that atleast ONE GIRL is chosen. I did it like this At least 1 girl so therefore I separated more than 1...

Math
So, for b it is (4,3)(4,4) + (4,2)(4,1)/(8,5)= 28/56= 1/2?

Math
2a) (4,1)x(4,4)/ (8,5)=4/56 For 2a, why is student 4,4? I don't understand that. I know that for 1 teacher, there is 4 student because there is 5-person committee. I don't know question b.

Math
Find the probability of: a) Rolling a three OR a six with a single die Answer: P(3 U 6)= n(3U6)/n(S) = 3+6/6 = 9/6 reduced: 3/ b) Dealing an ACE OR a FACE CARD from a standard deck Answer: P(A U F)= 4/52 + 12/52 = 4/13 2. A 5-committee is to be chosen from 4 teachers and 4 ...

Math
How many distinct permutations of the letters of the word OTTAWA being and end with the letter T? I did 6!/2! :S but i get 360. I tried 6P2=30 I am getting it wrong... help please.

physics
You push a 1.9 kg block against a horizontal spring, compressing the spring by 13 cm. Then you release the block, and the spring sends it sliding across a tabletop. It stops 60 cm from where you released it. The spring constant is 200 N/m. What is the block-table coefficient ...

science/math
0.0821917 ? .082 m a day

science/math
A sand dune can travel up to 30 m per year. How far does the sand dune move per day?

Pre-algebra
Transform the formula. The area of a triangle A can be found with the formula A=1/2bh where b is the length of the base of the triangle and h is the height of the triangle. Solve the formula for h.

English
Thanks for your help.

English
The example we were given was - He was a fine doctor, but he was growing old. My assignment was to find 5 sentences that use this pattern.

English
Where can I find examples of the sentence pattern Pronoun-verb-article-noun, conjunction-pronoun-verb-adverb on the internet? I need 5 examples. Thank You.

ant101
how would i answer this question? i am having a hard time coming up with an answer

ant101
As a cultural anthropologist what might you propose to research and would it be an Ethnology or Ethnography? What methods would you use to gather your data? What potential issues may you face while conducting your fieldwork and how would you deal with them?

Math
What is 7 1/4 minus 3 3/8?

physics
A child drops a coin from the window of a house.it strikes the ground 0,8 s later.what is the magnitude and direction of the coin's acceleration?

Physical science
A body falls from rest for 5seconds calculate its velocity-time graph of its motion (from t= 0s to t=5s)

biology
which process most likely caused the change in CO2 level in the flask over the lasy 37 minutes?

math
I thought 22 was the answer, but the part in my book about describe how to mentally check your answer threw me off

math
the diameter of a soup can is 7cm. the label wraps around the can. about how many centimeters long must the label be to go all the way around the soup can? use 22/7 for pi describe how to mentally check whether your answer is reasonable

math
what is 125% of 60?

8th grade math
the 14th day

Chemistry
I need a creative title for a lab report that deals with using dalton's partial pressure law in order to determine the amount of hydrogen gas that was collected over water. any ideas?

7th grade
what were the steps on mendels experiments with pea plants?

Algebra
if i am correct it should be 120 because its cross mutiplying so 6*20=120/1= 120

9th grade geography
what is the capital of alabama

statistics
SAT scores are normally distributed with a mean of 1518 and a standard deviation of 325. What scores correspond to P20 and P65?

Physics-HELP PLEASE
If I'm driving a car and I make a turn to the right, what will happen to a bag of items that is sitting next to me in the car-in terms of inertia, friction and centripetal force I think they will fall the opposite direction but we just started this unit and I don't ...

Physics
If I'm driving a car and I make a turn to the right, what will happen to a bag of items that is sitting next to me in the car-in terms of inertia, friction and centripetal force I think they will fall the opposite direction but why?

geometry
How do I draw an acute scalene triangle with lengths of 8cm, 10cm, and 16cm?

4th grade
Let n= any random number, then n-5

science
Words to use: Accelerate - Sliding - Brake - Friction - Slipping - Inertia Velocity - Wheel - Strength - Static - Terminal velocity Questions 1. An object will ____?____ when the net force is not zero. 2. ____?____ will never speed up an object. 3. The friction that prevents ...

similiar figures
the rul (x,3/4y) is applied to a polygon. Is the image similar to the original polygon?

Science
The gravitational force of any object near Earth is _____? A unknown B friction C Newton's First Law D 9,8m/s2 When you walk across a bridge, the _____ force of the bridge keeps it from breaking. A gravitational B normal C strong D weak A (n) _______________ helps reduce ...

similar figures
The rule (x,3/4y) is applied to a polygon. The given point is on the original polygon. Find the image of the point (6,8)

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