Friday
July 25, 2014

Posts by Kay


Total # Posts: 634

Math - 3rd grade summer work
so, this doesn't follow any rule of physics that the ball would slow down with each bounce?

Math - 3rd grade summer work
A Super-Duper ball bounces twice its height when it is dropped. Carl dropped a Super-Duper ball from the roof of a 12-foot garage. How high will the ball bounce after 5 bounces?

vocab
i need help

science
2. I need help balancing this Na2(SO4) + CaCl2 „³ NaCl + Ca(SO4)

language art
One is a story called teacher hero: Erin gruwell by jerrilyn jacobs.the other is from zlata`s diary by zlata flipovic.

language art
What is one difference between the credentials of jerrilyn Jacobs and zlata filipovic? Jerrilyn jacobs is younger Jerrilyn jacobs provides a firsthand account Jerrilyn jacobs is a communications expert Jerrilyn jacobs is a teaching expert I picked b is that right?

Algebra II
what is the slope of any line parallel to the graph of 6x+5y=9

math
ok

science
Which evidence from the sea floor shows that tectonic plates move? A) the sea floor is youngest near a mid ridge and farther away. B) the sea floor is much older the cont. C) mid ocean ridges form the longest range of mountains on earth. D) the sea floor is thinner than the cr...

math
x+9=2

social studies
I tried reading but I'm very confused. what answer do you think it is?

social studies
ANSWER! PLEASE!! which of the following most contributed the rise of Sumer? a. farming b. military power c. isolated location d. trade

social studies
okay. thank you!

social studies
what answers are you thinking?

math
amy is 5 feet tall shes standing 12 feet from a street light if amy's shawdow is 4 feet long which porportion could be used to find the height of the street light

math
there are 13 boys and 14 girls in mrs greens class if 3 of the students are absent today what is the ratio of students absent to students present?

math
A customer earned $3,262.50 interest on a 9-month CD. How much was the opening deposit?

Chemistry
thank you

Chemistry
The Ksp of tin(II) hydroxide, Sn(OH)2, is 5.45 × 10-27. Calculate the solubility of this compound in g/L.

chemistry
When aqueous solutions of potassium carbonate and magnesium nitrate are combined, solid magnesium carbonate and a solution of potassium nitrate are formed. The net ionic equation for this reaction is:

chemistry
Write the net ionic equation for the following molecular equation. HBr is a strong electrolyte. HClO is a weak electrolyte. KClO(aq) + HBr(aq) KBr(aq) + HClO(aq)

chemistry
Predict the prdeucts of the following acid/base and precipitation reactions and balance the equations. Remeber to indicate (s), (l) or (aq Q1. HCI(aq) + Mg(OH)2(aq)----> Q2. Pb(NO3)2(aq)+ Na2S (aq)---> Q3. write the ionic equation for question 2.

chemistry
write the net ionic equation for the following molecular equation. 2Crl(aq)+3NaCO3(aq) ---> Cr2(CO3)3(s) + 6NaI(aq)

chemistry
what is the net ionic equation for the following molecular equation. HNO3 is strong electrolyte and CH3COOH is weak electrolyte. NaCH3COO(aq)+HNO3(aq)----->NaNO3(aq)+CHOOH(aq) the same question says use H+ for the hydronium ion, CH3OOH for acetic acid and CH3COO for the ace...

Chemistry
Predict the prdeucts of the following acid/base and precipitation reactions and balance the equations. Remeber to indicate (s), (l) or (aq Q1. HCI(aq) + Mg(OH)2(aq)----> Q2. Pb(NO3)2(aq)+ Na2S (aq)---> Q3. write the ionic equation for question 2. Can you let me know how ...

Chemistry
sorry your right its 2Crl3(aq) and 3NA2CO3(aq) apologies for the error.

Chemistry
how u explained the last post, can u please explain in details like that for this question. write the net ionic equation for the following molecular equation. 2Crl(aq)+3NaCO3(aq) ---> Cr2(CO3)3(s) + 6NaI(aq)

Chemistry
I got that answer wrong. You was right I didnt need H2O

Chemistry
Thank you! i will try that and see if i get it right and let you know of the outcome. Than you for your help much appreciated..

Chemistry
Also i would be very grateful if u can explain how u got the answer so i know how to work it out in future please.

Chemistry
so i should have CH3COO^- + H^+ ==> CH3COOH +H2O??? as my online test has four boxes

Chemistry
the same question says use H+ for the hydronium ion, CH3OOH for acetic acid and CH3COO for the acetate ion. answer + answer---> answer + answer it has four boxes, pretend the answer is one box. i hope this helps

Chemistry
net ionic equation for the following molecular equation. HNO3 is strong electrolyte and CH3COOH is weak electrolyte. NaCH3COO(aq)+HNO3(aq)----->NaNO3(aq)+CHOOH(aq

Chemistry
net ionic equation for the following molecular equation. HNO3 is strong electrolyte and CH3COOH is weak electrolyte. NaCH3COO(aq)+HNO3(aq)----->NaNO3(aq)+CHOOH(aq

Stats
Suppose that you are in a class of 31 students and it is assumed that approximately 10% of the population is left-handed. (Give your answers correct to three decimal places.) (a) Compute the probability that exactly five students are left-handed. (b) Compute the probability th...

math
Solve the set of linear equations by the matrix method:a+3b+2c=3,2a-b-3c=-8,5a+2b+c=9 sove for a

human and social biology
what causes the decreases of the oestrogen levels and on which days of the cycle it occured?

Algebra
Solve the system by substitution. x + 3y = -4 2x + 2y = -8

math
thank you

math
the tigers played 20 baseball games during the summer. they won 4 more games than they lost. how many games did they win? how many did they lose?

algebraI
Airplane at 19,200 feet descending at a rate of 40 feet per second. Another airplane takes off and ascends at a rate of 60 feet per second. After how many seconds will the airplanes be at the same height? What is this height?

Science :)
which answers were right~checking my answers btw~

math
Miriam is four years older than Ricardo. 10 years ago she was 3 times as old as Ricardo was then. A) How old are they now B) determine whether your answer is correct by checking that it satisfies the conditions of the problems

Chem year one
yeah, that's what i meant.. but is the number of moles correct?

Chem year one
what is the balanced net ionic equation for the oxidation of hydrogen peroxide by permanganate ion and find out how many moles of hydrogen peroxide react with one mole of permanganate ion. would the answer be: 2MnO4^- + 6h^+ + 5H2O2 ---> 2Mn^2+ + 8H2O + 5O2 ratio of 2:5 0.4...

Chemistry: Organic Chemistry
Optically pure 2-octyl sulfonate, a compound with a leaving group comparable to the tosylate and mesylate groups discussed in this chapter, was treated with varying mixtures of dioxane and water as solvent. The optical purity of the resulting 2-octyl alcohol, a solvolysis prod...

Finance
Harrison Inc. has issued a zero/ coupon bond with par value of $1000. The bond pays no coupons until the end of the 6th year, at which point it pays 10% annual coupons. What is the issue (initial) price of this bond if it has a 20 year maturity and yield to maturity of 6%?

Finance
Suppose Preun Inc. issues $200 million in 60 day maturity commercial paper at a price of 99.35 par. (commercial paper is like a zero coupon bond. You buy it at a price of less than its par value and it pays the investor par value at the maturity date.) It then uses this money ...

Finance
Assume that Pelon Inc. has issued a 10 year maturity bond with a yield of 8%. Its coupon rate is 5% and the coupons are paid semi annually. Its par value is the value of this bond at the issue date?

physics
Two blocks of masses m and 2m are held in equilibrium on a frictionless incline as in the figure. In terms of m and θ, find the following.

Math
How many distinct real numbers x are true for f(x)=0. Explain. F(x)=x^2+(1/(500x^2-1000))

university of phoenix
It has been reported that 40% of children in the United States live in homes where both parents work to make ends meet. A school administrator claimed that more than 40% of children in his school district lived in homes where both parents work to make ends meet. In a sample of...

Social studies
How was New England and the southern colonies were alike? How we're they different?

physics
it's wrong !!!

Physics (help steve)
Exact solutions for many-body problems are rarely encountered in physics. The following problem deals with a non-trivial motion of four charges. Due to the symmetry of the problem it is possible to determine the trajectories of the charges analytically. Four identical particle...

Physics (help steve)
A boy is spinning on a chair and holding a paper bag so that it is horizontal, and perpendicular to the axis of the rotation. What should be the angular velocity of the boy in radians/second so that the bottom of the bag breaks? Details and assumptions Assume paper breaks at a...

Physics (help steve)
A helium ion is at rest in a laboratory when it is put in an electric field of E=2 N/C. An infrared light, of wavelength 2000 nm, is directed towards the ion. The ion is moving towards the source of radiation. After what time in the laboratory frame in seconds will the ion abs...

Physics (help steve)
A boy is spinning on a chair and holding a paper bag so that it is horizontal, and perpendicular to the axis of the rotation. What should be the angular velocity of the boy in radians/second so that the bottom of the bag breaks? Details and assumptions Assume paper breaks at a...

physics
Suppose the Earth's orbit is divided in two by its minor axis as shown in the figure. How much longer in days does the Earth spend in one half than the other? The eccentricity of an elliptical orbit is defined as e:=a/c where c is the semi-major axis and a is the distance ...

Physics
Two thin and identical steel rods move with equal speeds v=1 m/s in opposite directions and collide longitudinally. The collision is perfectly elastic and the rods swap their velocities. How long does the collision last in seconds if the length of the rods is l=30 cm. Assume t...

Chemistry
Why is a beehive used in the preparation of hydrogen

math
Verify that the function f(x)=x^3-6x^2+8x+4 satisfies the three hypotheses of Rolle's Theorem on the given interval [0,4]. Then find all numbers c that satisfy the conclusion of Rolle's Theorem

chemistry
how much heat would be required to warm the earth's oceans by 1 degree celcius if the volume of the earths oceans is 137x100000000km3 and the density of the seawater is 1.03g/cm3

Business Fin303
How do you solve and or what formula do u use to solve this question: A stock that pays a constant dividend of $2.5 forever currently sells for $24. What is the required rate of return?

Statistics
Maureen is a cocktail hostess in a very exclusive private club. The IRS is auditing her tax return. Maureen claims that her average tip last year was $4.75. To support this claim, she sent the IRS a random sample of 52 credit card receipts showing her bar tips. When the IRS go...

life orientation
discuss in a paragraph of 150 words ways in which one can take responsibility to provide safe and healthy living environment

chemistry
Three metals, iron, copper, and gold, have heat capacities of 0.450 J/goC, 0.385 J/goC and 0.129 J/goC, respectively. A 10g sample of each metal was heated in a water bath at 100oC. One of these metals will be placed in a Styrofoam cup containing 50.0 mL of water at 25oC. Whic...

Calculus
Find the derivative y= a^3 + cos^3 X

Physics
So if mgh=1/2mv^2 and I'm solving for v is my answer going to be v= squareroot of 2* (gravity) 9.8m/s^2* (height) 3.67m?

Macro
Real Disposable (Billions) Consumption Expenditures (Billions) Savings (Billions) Income $100 $150 ____________ 200 200 ____________ 300 250 ____________ 400 300 ____________ a. Graph the consumption function with consumption spending on the vertical axis and disposable income...

Macro Consumption Question
(Simple Spending Multiplier) For each of the following values for the MPC (marginal propensity to consume), determine the size of the simple spending multiplier and the total change in real GDP demanded following a $10 billion decrease in spending: a. MPC = 0.9 b. MPC = 0.75 c...

Accounting
If you looking for the inventory at the beginning of March then you will ignore all of the question except for the beginning. Therefore your answer should be 6 units X the $27/unit= $162.

chemistry/science
Magnetic domains

algebra
I think its d

organic chemistry
what type of feature will be observd in the ei mass spectrum of chlorobenzene?

geometry
The measures of two consecutive angles of a parallelogram are in the Ratio 3:7. Find the measure of an acute angle of the parallelogram

accounting
No he should have credited the motor car as either inventory ( depending on the type of company he worked for) or an asset and the he should have credited the Accounts Payable account because the machine was brought on credit therefore it is a liability to the company and must...

Statistics
32% of adult internet users have purchased products or services online. For a random sampling of 200 adult users, find the mean, variance and standard deviation for the number who have purchased goods or services online?

math
Natalie is buying potatoes at the grocery store. If she buys 6 potatoes that each have a mass of 375 grams, what is the total mass of the potatoes, in kilograms?

math
if i cross multiply 1/2*4/22 what will i get.... just really need an example

Chemistry
You have 10.0 L of 1.2 M KNO3. What molarity would the KNO3 solution be if you were to take 2.5 L of it and dilute it to 10.0 L?

statistics
An April 15, 2002 report in Time Magazine stated that the average age for women to marry in the United States is now 25.1 years of age. If the standard deviation is assumed to be 4.6 years, find the probability that a random sample of 34 U.S. women would show a mean age at mar...

Physics
A horse on a merry-go-round is 20 ft from the center and travels at 10 mph. What is its angular speed?

Math
The wheels of a bicycle have a 24 inch diameter. When the bike is being ridden so that the wheels make 12 rpm, how far will the bike travel in one minute?

algebra
14+6x/18=40 6x/18=40-14 6x/18=26 x=26/6/18 =78

physics
A document ys to be reproduced using a duplicating camera where should the document be placed in order to obtain an exact copy

physics
0.16

physics
At what angle to the horizontal must the nozzle of a machine gun be kept when firing to obtain a maximum horizontal range for the bullet(show your working)

algebra
27500

Maths
L=2x-1 W=x+3 Area =294cm find length and with of rectangle

Chemistry
When you have 250. mL of a 2.80 M solution of HCl, how many moles of HCl do you have

number theory
According to the Journal of Irreproducible Results, any obtuse angle is a right angle! Here is their argument. Given the obtuse angle x, we make a quadrilateral ABCD with DAB = x, and ABC = 90◦, andAD = BC. Say the perpendicular bisector toDC meets the perpendicular bise...

Math
12+18+28+x/4=21 58+x=84 x=84-58=26

Math
12+18+28+x/4=21 58+x=84 x=84-58=26

chemistry
Need to find info about chemical reaction of lemon juice and baking soda. Doing experiment where gas produced will inflate balloon hopefully. Will outcome be a lot different than if I had used vinegar?

maths
an=a+(n-1)d so a30=a+(30-1)d=a+29d Similarly a20=a+19d so their difference is; a+29d-(a+19d)=a+29d-a-19d=10d

Algbra
As I gave $3290 for down payment I owe 16650-3290=$13360 If I pay $331.97per month *48 months=$15934.56 So when I owed 13360 I payed 15934.56 so 2574.56 more .If I owed 100 then I would have paid 100*2574.56/13360 more ie 19.3% Is that OK? Does it make sense to you?

math,
just simplify both. The best way to do it is half them; 51/7

math
We have to bring in into form: x^2/a^2+y^2/b^2=1. So dividing everyone by 5184 and simplifying: x^2/81+y^2/64=1 so; x^2/9^2+y^2/8^2=1 therefore a=9 and b=8. Vertices on x-axis (9,0)&(-9,0) on y-axis (0,8)&(0,-8). foci: (c,0)&(-c,0) where c^2=a^2-b^2 so c^2=81-64=17 so c= sqrt7...

math
If he travels at 120 Km per hour in 30'(ie 1/2 hour) he did 120/2=60Km. If he travels at max speed allowed he takes 30+20=50'or 50/60=5/6 hours to reach his destination. so speed is: 60/(5/6)= 360/5=72Km/h

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