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Posts by ann

Total # Posts: 1,465

thermochemical equation:
Given the following thermochemical equation: NO2 (g) + O2 (g) → NO (g) + O3 (g) ΔH = - 212 kJ Which has more enthalpy, the reactants NO2 (g) + O2 (g), or the products NO(g) + O3 (g) ? The reactants have more enthalpy. The products have more enthalpy. The reactants ...

math
Identify the solution of the system of equations if any -2x-4y=1 , 12y=-6x-3 is this no solution or (o,-1) (-1,0) or infinitelt many solution

physics
A toy car in the figure below runs off the edge of a table that is h = 1.150 m high. The car lands d = 0.410 m from the base of the table.

physics
what are the dimensions of power?

Physic
A 1/2 inch diameter piston moves 10 inches when 30 Lbs of force is applied how far will it move a 6 inch diamter piston and how much weight will this piston lift.

Physics
A highway curve with a radius of 800 m is banked properly for a car traveling 100 km/h. If a 1620- kg Porshe 928S rounds the curve at 220 km/h, how much sideways force must the tires exert against the road if the car does not skid?

Physics
During 0.19 s, a wheel rotates through an angle of 2.42 rad as a point on the periphery of the wheel moves with a constant speed of 2.88 m/s. What is the radius of the wheel?

math
Max had 4/5 bag of trail mix. He divided the trail mix equally amoung 5 friends. What fraction of the full bag of trail mix did each friend receive?

math
Leah picked 2.6 pounds of blackberries. Ashlyn picked 1.8 times as many pounds of blackberries. How many pounds of blackberries did Ashlyn pick?

Micro-Economics
Suppose that the government imposes a tax on heating oil. 1. Would the deadweight loss from this tax likely be greater in the first year after it is imposed or in the fifth year? 2. Would the revenue collected from this tax likely be greater in the first year after it is ...

CHEM
A 1.000g mixture of As4S6(s) and As4S4(s) was burned in excess O2. The products were As4O6(s) and SO2(g). The solid product had a mass of 0.905g. Find the mass % of As4S4(s) in the original mixture.

English
How did the man-made environment Olaudah Equiano was forced into shaped his opinions and perspectives towards the first white men he encountered?

Algebra
53 % margin of 5 percentage is what

physics
A third baseman makes a throw to first base 39.8 m away. The ball leaves his hand with a speed of 43.0 m/s at a height of 1.4 m from the ground and making an angle of 23.7 o with the horizontal. How high will the ball be when it gets to first base?

math
stamjps are sold in bookiets of 100,50, and 10.find as many different ways to buy 200 stamps as you can. record your work in the chart. could you give me some examples...please!

math
stamjps are sold in bookiets of 100,50, and 10.find as many different ways to buy 200 stamps as you can. record your work in the chart. I don't understan what to do here. help

Math
In rectangle PQRS, diagonal PR makes a 60 degrees angle with side PS. If PR =10, what is the area of the rectangle?

physical science
A simple lever is used to lift a heavy load. When a 60-N force pushes one end of the lever down 1.2 m, the load rises 0.2 m. Show what the weight of the load is 360N.

math
A square flower bed is 10 feet long on a side. How many plants are needed if they are spaced 6 inches apart around the outside of the bed? With solution

algebra
24 - a - b answer 13

accounting
Westchase Supplies reported sales of $5,000,000, cost of goods sold of $3,200,000, operating expenses of $1,400,000 and income tax expense of $160,000 for the year What was the company’s net income for the year?

psychology last one tonight need to know if correc
_____________ is a biologically based style of interacting with the world that exists from birth. Fill in the blank. a. Culture b. Personality c. Temperament d. Attachment my answer is C

Psychology need to know if i have correct answer
What is the best explanation of the universal perspective in culture? a. Survival is related to the degree that people can adapt to their environments and to the contexts in which they live b. Evolutionary theorists believe people have evolved a set of motives and strivings ...

Psychology need to know if i have correct answer
Ms sue I believe now that i read it over it would be C

Psychology need to know if i have correct answer
What is a comprehensive theory on the structure of personality that contributes to our knowledge about the origins of psychopathology? a. Psychology b. Psychotherapy c. Psychoanalytic model d. None of the above My answer is B

Psychology need to know if i have correct answer
What would be a concern to take into consideration when interpreting data from cross-cultural studies? a. Effect sizes b. Whether the measures are equivalent c. Cultural attribution fallacy d. All of the above My answer is D

stats
A hospital claims that the proportion of full-term babies born in the hospital who weigh less than seven pounds is no more than 39% . Suppose that we want to carry out a hypothesis test for this claim, suspecting otherwise. State the null hypothesis and the alternative ...

english
In Wells, The War of the Worlds which of the following explains what made the humans so complacent? 1 Early in the 20th century came the great disillusionment 2. It is not only distant from time's beginning but nearer its end 3.Its physical condition is still largely a ...

english
In Wells, The War of the Worlds which of the following explains what made the humans so complacent?

Dental Questions Check Help Please!!!
The most common transaction a dentist office will use under the HIPPAA's electronic transaction and code set rule is

college physics
sd 40 jbds

chemistry
What is a Reaction that you would expect when acetylsalicylic acid (aspirin) is heated in the presence of a CONCENTRATED acid? Thanks in advance!

chemistry
If a reaction has rate constant of 1.33 s^-1 at 206 deg C and an activation energy of 58.6 kj mol^-1. whats the rate constant at 358 deg C ?

chemistry
Hello, Please help me with this question! Which dilution would turn 10% (by mass) HCl solution into 0.100 M HCl solution? Density of 10% HCL = 1.08 g ml^-1

physics
A Honda Civic travels in a straight line along a road. Its distance x from a stop sign is given as a function of time t by the equation x(t)= α t2− β t3, where α = 1.43m/s2 and β = 4.60×10−2m/s3 . 1)Calculate the average velocity of the ...

math
4x+5y=5 x=y-10

nau
4x+y==21 7x-4y=8

Ethics and moral reasoning
What is the difference between an internal good and an external good according to Maclyntyre's account?

Ethics and moral reasoning
Need help with Ethics and moral reasoning Reading Quiz 4

chem/math
I need help solving for x here (I don't get the right answer, which is supposed to be x=0.137) 3.88 = 3.74 + log (x/0.1) Please explain how you would get that answer Thank you

chemistry
What are the consequences of using only a very dilute solution of HCl or a very concentrated solution of HCl in attempting to return the pH? in attempting to return the pH to 7? What is a better alternative?

statistics
the selections are not independent

Statistics
The life of a blood pressure monitor has a normal distribution with an average of 40 years and a standard deviation of one year. What should the warranty be to replace a malfunctioning monitor with - if the company does not want to replace more than 1% of all the monitor. ...

Physics
A sled of mass 9.0 kg is sliding across a frozen lake with a speed of 5.0 m/s. A package of mass 4.0 kg is dropped onto it from above. Assuming there is no friction between the sled and the lake, what is the new speed of the sled?

Biology Please help
There are several genes that control eye color; eye color is therefore called a (A) Polygenic trait. Besides genes that directly control eye color, there are other genes that can affect the color of your eyes. For example, your eye color genes may code for green eyes, but if ...

Algebra
13a+9b-2a-4b

Calculus
Solve the differential equation dy/dx=3x^2y^2 with the condition that y(1)=4. I know that y= -1/(x^3 + c) but what do I do with the y(1)=4 part?

Calculus
The marginal revenue for x items in dollars is given by R′(x)=−4.5x+6. Determine (a) the revenue function and (b) the demand function. I know the revenue function is R(x)=6x-2.25x^2 just by finding the antiderivative. demand = revenue - cost, but how do I even find...

Calculus
Find f(x) if f′(x)=(−3)⋅x+(−1) and f(−4)=−1. I know if you find the antiderivative of f'(x) it is -3x^2/2 - x + c but what do I do next to find the function f(x)?

Calculus
thank you and yes it was months

Calculus
The rate at which an item depreciates is proportional to its value at that instant. If an item is presently values at $70,000 and 10 months later it is valued at $22,222, when in years will it be valued at $19,999? I'm not sure what formula to use...

Calculus
okay thanks

Calculus
How long must 4500 dollars be left on deposit at 8 percent compounded quarterly to reach a total accumulation of 15825 dollars? I did A=P(1+ r/n)^nt so I got 15825 = 4500 ( 1 + 0.08/4)^4t, and got t = 3.24886 years...am I even using the right formula?

Calculus
thank you for your explanation :)

Calculus
sorry it's log(base6)(x+3)−log(base6)(x−5)=2 the x in front of log isn't part of it

Calculus
Solve for x log(base6)(x+3)−log(base6)(x−5)=2. I tried to factor out the log(base6) and got (x+3)^x/(x-5)=2, but I don't know how to solve that...

Calculus
okay

Calculus
oh right you just have to factor out the logbase5...thank you

Calculus
Find A so that 5log(base5)16807 − 3log(base5)7 = log (base5)A I don't even know how to start this one...should I remove the 5 and 3 in front of the logs?

Calculus
thanks that makes sense

Calculus
Using log2=.3010 and log5=.6990 compute log2000000. 100000/5 = 20000 so I just did 20000*.699 = 13980 and then added .301 which equals 13980.3 ^I know that was wrong

Calculus
thank you!

Calculus
Use the Laws of logarithms to rewrite the expression log(1000000x^19)in a form with no logarithm of a product, quotient or power. After rewriting we have log(1000000x^19)= A + Blog(x)? I know B = 19, but what's A?

Calculus
it still says I'm wrong, but thanks for trying

Calculus
so would concave up be (1.34205, 2.37222)?

Calculus
f(x)=[3x^13]e^(−7x) On which intervals is the function concave up and concave down? I know when you find the 2nd derivative, the x-values are 0, 1.34206, and 2.37222, and that the 2nd derivative > 0 at x=1.34205 and < 0 at 2.37222. How does this tell me the ...

Calculus
thanks

Calculus
The quantity Q of radioactive carbon remaining in a 200-gram wood sample at time t is given by the expression Q(t)=200e^(−0.000225⋅t). How much radioactive carbon remains in the sample after 100500 years? I just plugged in 100500 as t and got 3.02375 grams as an ...

Calculus
thanks!

Calculus
How much should be deposited into an account today if it is to accumulate to $32400 in 30 years if the account bears interest at 8.01% compounded monthly? I did A = 32400(1 + 0.0801/12)^(12*30) = $355,375, but that's wrong...

Calculus
ok thanks

Calculus
I thought it would just be A = 88e^(0.07*9), which equals 165.23 pounds, but apparently that's not correct...

Calculus
Poli 761 (a fictitious substance) decays by about 7% every day. How much of a 88 pound sample remains after 9 days?

Calculus
thank you!

Calculus
Why does 2ln6 - 2ln3 = ln4?

maths
1234567 x 7654321

MATH_URGENT
what additional information is needed to prove triangle klm triagle pqr by sas?

Math
Write the inequality and solve: The product of a number and 7 is less than 28

geometry
Hi, could someone explain to me the steps I should take to solve the following problem. If radius BE is a perpendicular bisector of chord AC, then what is AB to the nearest tenth? BD is 7cm and DC is 9.

geometry
The radius of the earth is approximately 6371 km.If the international space station (ISS) is orbiting 353 km above the earth, find the distance from the ISS to the horizon(x)

geometry
10^2=x•(x+3x) Use quadratic formula to solve

Calculus
no, but thanks for your answer!

Calculus
Evaluate ∫(2x^3/√(1-x^4))dx I can't figure out what u and du is... please help thanks

Calculus
Given f(x)=−2x^3 -3x + 1, the value of the derivative of the inverse function, f^−1(x) at x=−21 is (f^1)′(−21)= ? please explain how to solve this

Calculus
If e^x = 243 and e^y = 32 then e^((3x + 4y)/5) =? The answer is 432, but I don't understand why.

Calculus
Thank you very much!

Calculus
The height in feet above the ground of a ball thrown upwards from the top of a building is given by s=-16t^2 + 160t + 200, where t is the time in seconds. If the maximum height is 600 feet, what is v^-1(32)? The answer is supposed to be 4 seconds, but I don't understand ...

algebra
Mary has a total of $5000 invested in two accounts. One account pays 5% and the other 8%. Her interest in the first year was $331. Write and solve a system of equations to find out how much she has invested in both accounts

geometry
If I need to make a mold with a square base with a volume of exactly 28 cubic centimeters how many possible molds could I make?

chemistry
its actually my fault sorry :$ , i wrote the question wrong its barium oxide + water so would it be BaO + H2O --> Ba(OH)2 ??

chemistry
oh so for barium + water the chemical equation is BaO + H2O but how do i figure out the rest?

chemistry anyone??? help!!
help me please!! i don't get it

chemistry
what is the chemical & word equation of sulfur dioxide + water i don't understand this, can someone please explain to me how to do this!!?

literacy
thankyou Ms.Sue!! :D

literacy
can i just show u tomorrow then if u don't mind? please and thank you !! :)

literacy
its not really for a class i'm just practicing for the osslt test. so will u actually mark it and give feedback??

literacy
and also i have another question. if i write me news report will u pleasee give it a level out of 6 ??

literacy
so should it be: "a major ice storm shuts down the region of ... on january 27 2012" ??

literacy
so can my lead sentence be " on january 27 2012 a major ice storm shut down the whole region of ..." ??

literacy
how do you write a news report on the topic "storm shuts down region"??

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