# Posts by jake

Total # Posts: 2,228

physics
A car starts from rest with a velocity given by v=kt^3 where k is a constant. The expression for the distance traveld by the car from its position at t=0 is: a] 3kt^3 b] kt^3 c] 6kt d] kt^4/4

physics
A first object is thrown vertically upward with some initial speed and some initial height above the ground. Simultaneously, a second object is thrown straight down with the same initial speed and same initial height above the ground. Before the second object reaches the ...

the shiny red car and the bicycle. I have to tell whether the sentence part can be used as a subject or a predicate then use the part in a sentence.

Chemistry
A solution is made by diluting 18.2 g glucose (C6H12O6) in 0.150 kg water. What is the mass percentage of solute in this solution?

algebra
Of the 240 campers at a summer camp, 5/6 could swim. If 1/3 of the campers took climbing lessons, what was the least possible number of campers taking climbing lessons who could swim? a) 20 b) 40 c) 80 d) 120 e) 200

grammar
Could you please check the grammar in these sentences? Thanks. It was clearly her, right from the start. These are they, if I'm not mistaken. It always appeared to be them whenever there was trouble. The penalty against them brought coach Henson and I great satisfaction. ...

chemistry
a mixture of gases at a total pressure of 95kPa contains carbon dioxide, oxygen, and nitrogen. The partial pressure of the carbon dioxide is 48kPa and the partial pressure of the nitrogen is 24kPa. What is the partial pressure of the oxygen?

chemistry equilibrium
In a 0.10 M solution of glutaric acid, HO2C(CH2)3CO2H (K1 = 4.6 ´ 10-5, K2 = 3.9 ´ 10-6), the species present in the next to highest concentration is A. H3O+(aq). B. HO2C(CH2)3CO2H(aq). C. HO2C(CH2)3COO-(aq). D. -O2C(CH2)3COO-(aq). E. OH-(aq).

calculus
Find a vector perpendicular to the plane that contains the points A(1,2,3), B(3,2,1), and C(-1,2,-3) Where do I start to find it?

momemtum ?
I know that momemtum (p) is equal to mass times velocity, but I am not sure how to get the velocity.

momemtum ?
A ball of mass 0.150 kg is dropped from rest to a height of 0.125 m. It rebounds from the floor to reach a height of 0.960m. What impulse was given by the floor? please help/explain. Thanks!

Math
Which one is smaller 5.8x10^-3 or 4.5x10^-3

STATISTICS
There are 10 colored balls in a box ( 5 red, 3 blue, 2 green ). What is the probability of picking out a red ball and then a blue ball ( If I do not replace the red ball )? 1/6 1/2 3/20 4/5

STATISTICS
Can a frequency distribution have overlapping classes? Sometimes No Yes Can't determine. I need more information.

STATISTICS
ONE of the following can be classified as Discrete and Quantitative data. The acceleration of your car as you drive to school. The different colors of the eyes of your classmates. The number of students in your school. The height of all the people in your neighborhood.

social studies
Should Nations pursue goals of international cooperation to ensure security

calculus
How do you find the limit of: 1(1 - (1/k))/2! as k increased with no bound? I know the answer is 1/2! But how do you get there? Are you supposed to divide both top and bottom by k?

trig
Regarding the trigonometric series, Why does cos start with a 1 and why are the powers of x even numbers Also for sin, why does sin start with an x and why are the powers odd?

STATISTICS
The area under a normal curve distribution is Equal to 100 almost equal to 1 equal to 1 equal to .5

STATISTICS
What percentage of the general U.S. population has bachelor’s degrees? Suppose that the Statistical Abstract of the United States, 120th Edition, gives the following percentage of bachelor’s degrees by state. For convenience, the data are sorted in increasing order. ...

STATISTICS
Find the sample standard deviation s for the following sample data. Round your answer to the nearest hundredth. x: 23 20 11 33 27

STATISTICS
I HAVE 150 FOR MY ANSWER

STATISTICS
If I go into an ice cream parlor, and I have the choice of having one of 10 different flavors , with one of 5 different toppings and one of 3 different types of cones, How many times can I come back to this place and get a different ice cream cone combination

STATISTICS
i HAVE AN ANSWER OF 90

STATISTICS
A Statistics teacher has the following test scores : 93, 72, 80, 95, 90, 70, 91, 85, 86, 100 What is the median test score of these grades ?

STATISTICS
I HAVE AN ANSWER OF 7 WHICH WOULD BE 70

STATISTICS
For a 10 point quiz, the professor recorded the following scores for 8 students: 7, 8, 3, 9, 10, 6, 8, 5 What is the Mean for this set of scores?

STATISTICS
The Sarasota Police department collected data on the number of car accidents ( X ) that occur each day on a certain stretch of route 41. From this data, they derived the probability distribution shown in the table below. X P(X) 0 0.80 1 0.15 2 0.05 What is the expected mean (...

STATISTICS
There are 10 colored balls in a box ( 5 red, 3 blue, 2 green ). What is the probability of picking out a red ball and then a blue ball ( If I do not replace the red ball

STATISTICS
What type of distribution is described by the following information? Mean = 56 Median = 58.1 Mode = 63

STATISTICS
What type of distribution is described by the following information? Mean = 56 Median = 58.1 Mode = 63

Statistics
For a 10 point quiz, the professor recorded the following scores for 8 students: 7, 8, 3, 9, 10, 6, 8, 5 What is the Mean for this set of scores?

Chemistry
A weather balloon at Earth's surface has a volume of 4.00 L at 304 K and 755 mm Hg.? If the balloon is released and the volume reaches 4.08 L at 728 mm Hg, what is the temperature? What gas law do you use?

Chem
Can't figure this one out....how do you balance MnO4- + SO3-2 ====> SO4-2 + Mn+2?

chemistry
The specific heat of copper is .4 joules/gram degrees Celsius. How much heat is needed to change the temperature of a 30 gram sample of copper from 20 degrees to 60 degrees? I just need to know how to set up the problem and solve it.

Organic Chemistry
I am suppose to calculate the theoretical amount (volume) of 3M sodium hydroxide needed to convert 1.5 g of benzoic acid to its salt. Also calculate the volume of 12M HCl needed to convert the sodium benzoate back to benzoic acid. how do I go about doing this? Thanks

college chem
Ammonium carbonate (solid) decomposes when heated to produce three gaseous products - ammonia, water, and carbon dioxide. 1. Write the balanced equation for the reaction. 2. Suppose that ammonium carbonate is heated to 500 K in a sealed vessel. At equilibrium there is still ...

chem
Ammonium carbonate (solid) decomposes when heated to produce three gaseous products - ammonia, water, and carbon dioxide. 1. Write the balanced equation for the reaction. 2. Suppose that ammonium carbonate is heated to 500 K in a sealed vessel. At equilibrium there is still ...

Trigonometry
In this problem, you will describe in detail how we arrive at the accepted definition of the function y= Arccsc(x) a) Sketch the cosecant function over the interval (-2pi, 2pi) i can do that b) This function is not one to one - please explain in detail the meaning of this ??? ...

Chemistry
I have no idea what I'm doing wrong here... Question: A solution is 0.3% by mass calcium chloride. Therefore, 145 g of the solution contains how many grams of calcium chloride? My solution: 145g x (0.3g / 100g) = 0.435g or 0.44g CaCl2 What am I doing wrong? Thank you!

Chemistry
Dr.Bob222 - You are absolutely right. It totally slipped my mind that 0.3 has ONE sigfig. Thank you.. your help is much appreciated!

Chemistry
I have no idea what I'm doing wrong here... Question: A solution is 0.3% by mass calcium chloride. Therefore, 145 g of the solution contains how many grams of calcium chloride? My solution: 145g x (0.3g / 100g) = 0.435g or 0.44g CaCl2 What am I doing wrong? Thank you!

history
what was the name of the ship that Sir Neville Howse came home on after WW1 also the date of return to Australia

statistics
339

trigonometry HARD!!
An airplane flies due north from a starting point at 234.6 mph for 40 minutes. Then turns flying 20 minutes at 252 mph in the direction N 20 degree 31 minutes East. How many miles is the airplane from the starting point?

Chemistry
I think I understand, but the thing that I'm still a bit confused about is how ionic forces and dipoles differ. If dipole-dipole is + to -, then are ionic forces opposite charges as well? They must be in order to attract. Sorry if I'm being stupid.

Chemistry
The forces holding together an ionic solid are much stronger than the forces between particles in a molecular solid. How are these strong forces reflected in the properties of an ionic solid? a) strong hydrogen bonding exists between discrete molecules b) strong dipole-dipole ...

Chemistry
Thank you!

Chemistry
For #1 I think all three because there's hydrogen bonding between the O-H, there's dipole-dipole between C-H and there's Londond dispersion between the individual H. If that's the case, then all three would apply for #2 as well. Am I close?

Chemistry
Discuss the types of intermolecular forces acting in the liquid state of each of the following substances. (Select all that apply.) 1. CH3CH2CH2CH2OH a) dipole-dipole forces b) London dispersion forces c) hydrogen bonding 2. CH3OH a) dipole-dipole forces b) London dispersion ...

chemistry
I'm the one who posted the question... this is how I'm doing part A. I'm told it's the wrong answer, but I can't figure out what I'm doing wrong. I'm hesitant on going to parts B and C until I understand part A. Part A: Step one: I changed the mols ...

chemistry
Some properties of aluminum are summarized in the following list. normal melting point 658°C heat of fusion 0.395 kJ/g normal boiling point 2467°C heat of vaporization 10.52 kJ/g specific heat of the solid 0.902 J/g°C (a) Calculate the quantity of energy required ...

Social
Yeh i agree with you about wikipedia, but my teachers lame. Trust me i wish i could get a new teacher. Marketing of prescription drugs actually sounds pretty interesting thanks!

Social
Hi i have 2 weeks to write a paper about anything related to marketing. It has to be 7 pages so I need a good topic and a place to find solid information (our teacher said don't use wikipedia at all because he hates it). I was wondering if you could help me get started. ...

Science- Chemistry Ap
2SO3(g) -> 2SO2(g) + O2(g) Delta H = 197kj For this reaction shown above, describe the changes that will occur to the number of moles of SO3 under the following conditions: (a) Additional oxygen is added to the reaction vessel. (b) The pressure in the reaction vessel is ...

college algebra
[x+2]=5 solve for x I have an answer of (3,7) is this correct or could this be (3, -7)

college algebra
[x+2]=5 solve for x I have an answer of (3,7) is this correct or could this be (3, -7)

college algebra
f(x)=x^2+3; g(x)=x+4 find (fog)(-2) I have an answer of -7 or could this be just 7

college algebra
solve for x (2x-7)*(x+4)=0 i have an answer of (7/2 -4) is this correct or is the answer 5,4

college algebra
find the vertex f(x)=3x^2-6x+8 I have an answer of -1 and 17 I believe that the correct answer is 1,5 is this correct

college algebra
give the following linear equations 2x+3y=10 4x-6=-28 I have an answer of (-1,4) or couls this be (0,4)

college algebra
I have a line equation whose slope is -2 and passes through(-1,6) I have a slope intercept form of y=-2x+4 is this correct or could this be -2x+8

college algebra
solve for x 3(x-2)= -4(x+8)+10 my answer to this was -16/7 however I believe the answer is -36/7 did I solve this with the right answer.

college algebra
f(x)=x^2-4x-2 g(x)=x+7 what is the function using (f.g)(x) my answer is x^3-3x^2-30x+14 is this the correct answer

college algebra
what is the y value of the vertex f(x)=x^2+6x+5 I have an answer of 4 this is important because I come up with -4 and I believe the answer to this is 4

college algebra
what is the x value of the vertex f(x)=x^2+6x+5 my answer is -3 is the correct

college algebra
f(x)=4x/x-2 what is the y-intercept, I believe this to be (0,4) and not (0,0)

college algebra
f(x)=4x/x-2 what is the vertical asymptote I have a possible answer of x=2 am I on the right track

math
I'm having trouble simplifying two problems with exponents. Please help. Thanks. 1. [(-2)^4]^3 2. 10^7 . -1/10

math

college
if y=kx/square root of w find k when y=4 x=12 and w =4 I have an answer of 16/3 and I believe that the correct answer is 2/3 am I right.

college algebra
if f(x)=4x/x-2 what is f(3) possible answer would be f(3)=12 is this correct

college algebra
f(x)=4x/x-2 what is the vertical asymptote I have a possible answer of x=2

college algebra
if y=kx/square root of w find k when y=4 x=12 and w =4 I have an answer of 16/3 aia believe that the correct answer is 2/3 am I right.

calculus
simply the summation of (2/n)(2i/n)

medical records
How does accreditation affect the practical activities of record management in hospitals

science
25 ml sample of 0.150 m solution of aqueous trimethylamine is titrated with 0.100 M soultion of hcl. calculate the pH of the solution after 10.0ml,20 ml and 30.0 ml of acid have been added; pkb of (CH3)3 N =4.19?

Math
Multiply. Use the partial-products algorithm. 87 x 65 Not sure how to use the partial-product algorithm.

algebra
write each number in exponential notation 100= 10,000=

Chemisty
^ ^ ^ Chris is right! THANKS SO MUCH MAN!!!

chemistry
A gas absorbs 45 kJ of heat and does 29 kJ of work. Calculate the change in energy. The answer is 16 kJ, but I don't understand why. If a gas absorbs heat and does 29 kJ of work. Wouldn't they both be positive? Change in energy = q + w 45 kJ + 29 kJ = 74 kJ Why is the ...

integrated algebra
5-3(2b-3)= -4

physics
An object is thrown vertically into the air with an applied force of 145N. what is the initial acceleration of the object?

math
0.8125

physics
a 125Newton box is pulled east along a horizontal surface with a force of 60Newton acting at an angle of 42degrees. if the force of friction on the box is 15 newton, what is the acceleration?

physics
Physics force of friction question a 63kg water skier is pulled across a lake by a rope that exerts a force of 3.2x10^2 and makes an angle 17 degrees above the horizontal. if the coefficient between the skies and the lake is 0.27 at what rate will the skier accelerate?

physics
isn't vf 5.8

physics
Physics force of friction question a shuffle board disk is accelerated to a speed of 5.8m/s and released. if the coefficient of the kinetic friction between the disk and the concrete court is 0.3, how far does the disk go before it comes to a stop?The courts are 15.8meters long

psychology
So you answered my question to tell me not to post it twice that was an accident...heres my question i need some help please, don't tell me to post again because it was by accident. Which color arrangement wouldcreate the deepest senseof space? A. red,orange,blue B. Green ...

psychology
Which color arrangement wouldcreate the deepest senseof space? A. red,orange,blue B. Green violet, blue C.Yellow, orange,yellow-orange D. Violet, blue-violet, red-violet What are the double split complement colors for blue-green?

Psychology
Which color arrangement wouldcreate the deepest senseof space? A. red,orange,blue B. Green violet, blue C.Yellow, orange,yellow-orange D. Violet, blue-violet, red-violet What are the double split complement colors for blue-green?

3.14

american history
Francis Cabot Lowell led a group of businessmen who? A. built a centralized textile factory in massachusetts B. ended that market revolution C. received the first state charter for a bank D. cashed in so many bank notes that they led to a panic in 1837

physics
i thought T was the total time dont you have to subtract it by the time of the angle to find the time of the fall

physics
Need help with short projectile motion question a ball is thrown up off the roof of a school at an angle of 55 degrees from the horizontal and at a velocity of 25m/s. how long before it hits the ground if it land 95meters from the base of the building? at what horizontal and ...

math
A parabola with a vertex at (–1, –2) passes through the point (1,6). Using this information, what are the x-intercepts of this parabola? A) (1 – , 0) and (1 + , 0) B) (2, 0) C) (0, 0) and (–2, 0) D) (0, 0) how would i figure this out?

math
how would i do this quadratic word problem A local daycare centre charges \$65 per day to care for a child. The daycare currently cares for 150 children per day. A survey shows that the enrollment in the daycare will increase by 10 children for each \$5 decrease in daily fee, ...

math
sorry i forgot to write math

samuel
how would i do this quadratic word problem A local daycare centre charges \$65 per day to care for a child. The daycare currently cares for 150 children per day. A survey shows that the enrollment in the daycare will increase by 10 children for each \$5 decrease in daily fee, ...