Questions Asked on
March 1, 2008

Economics
A firm with monoply power has the demand curve: P = 100  3Q + 4A^1/2 And has the total cost function: C = 4Q^2 + 10Q + A where A is the level of advertising expenditures. P is price, Q is output. How do I find the values of A, Q, and P that maximize the
asked by Dan 
PHYSICS
Fig. 648 shows a conical pendulum, in which the bob (the small object at the lower end of the cord) moves in a horizontal circle at constant speed. (The cord sweeps out a cone as the bob rotates.) The bob has a mass of 0.038 kg, the string has length L =
asked by greg 
Physical Science
In your room are things such as tables, chairs and other people. Which of these things has a temperature lower than air? Greater than air? And equal to the temperature of air?
asked by Rachel 
Algebra II
The shape of a supporting arch can be modeled by h(x)= 0.03^2+3x, where h(x) represents the height of the arch and x represents the horizontal distance from one end of the base of the arch in meters. Find the maximum height of the arch.
asked by Jon 
physics again it didnt work.
A moving 1.60 kg block collides with a horizontal spring whose spring constant is 295 N/m. The block compresses the spring a maximum distance of 3.50 cm from its rest position. The coefficient of kinetic friction between the block and the horizontal
asked by rory 
Science
Compare and contrast how different electrolytessodium, potassium, and chloride function in the body. Why is water essential to health maintenance? What are the functions of water in the body? What happens to the body when it does not get the water it
asked by Sherri 
Physics
A musician plays the middle C note (262 Hz) on a guitar, a piano, and a violin at the same loudness. Will all three instruments produce exactly the same sound? Why or why not explain. Frequency (262Hz) is the same so that means that the pitch of the sound
asked by Andrea 
organic chemistry
What will be the effect of adding solid NaHCO3 to hot concentrated H2SO4? Why should the reaction vessel containing a synthesized ester be cooled first before neutralization? My Guess #1: Since neutralization is an exothermic process and the ester is in
asked by PIN 
organic chemistry
Why is that absolute ethanol be used in preparing an ester with ethanol as one of the reactants? My Guess: It will cause hydrolysis of the ester as it is formed in the reaction vessel. Is this reasoning right? Pls. I need help about this...
asked by PIN 
math
A GOOGOL IS THE NUMBER 1 FOLLOWED BY 100 ZEROS . a) WHAT IS A GOOGL WRITTEN AS A POWER ? b) WHAT IS A GOOGOL TIMES A GOOGOL WRITTEN AS A POWER ?
asked by mota 
Algebra II
Simplify: 4xy^3/z^2 divided by (8x^2y/z^3)^2 I came up with the following: 2.2.x.y.y.y.z.z.z.z.z/z.z.z2.2.16.x.x.x.x.y.y Simplified into x^3y/16x^3. Is this correct? Thanks for your help earlier and now.
asked by Lucy 
Science
What is the differnce of the dispersal of the seeds of the tomato and the spores of the mushroom?
asked by Yeoh 
physics
A car (m = 690.0 kg) accelerates uniformly from rest up an inclined road which rises uniformly, to a height, h = 49.0 m. Find the average power the engine must deliver to reach a speed of 24.9 m/s at the top of the hill in 15.7 s(NEGLECT frictional losses:
asked by rory 
math
Write the number in expanded form. 684
asked by Sue 
Physical science question 2
I am definitely lost on this problem. Can someone help me out? A(n) 51.3 kg astronaut becomes separated from the shuttle, while on a spacewalk. She finds herself 50.3 m away from the shuttle and moving with zero speed relative to the shuttle. She has a(n)
asked by Christy 
Ratios Math
Please help The following table shows the number of calories burned per hour (cal/h) for a variety of activities, where the figures are based on a 150pound person. Bicycling 6mi/h 240 Running 10mi/h 1280 Bicycling 12mi/h 410 Swimming 25yd/min 275
asked by Sherri 
MATH
For the decimal 8.62354: What is the place value of 5? IS IT TENTHOUSANDTHS Hundredths Thousandths Tenthousandths Hundredthousandths
asked by Sue 
math
A patient has been instructed to take 15ml of alumina and magnesium oral suspension every other hour for four doses daily. How many days will two 12 oz bottles last?
asked by melissa 
Algebra II
Write a quadratic equation with 3/4 and 4 as its roots. Write the equation in form ax^2+bx+c=0, where a,b,and c are integers. (xp)(xq)=0 (x3/4)(x4)=0 (x+3/4)(x4)=0 x^23x+3=0(answer)
asked by Jon 
Physics
A block oscillates on a spring and passes its equilibrium position with a speed of .157m/s. It's kinetic energy is zero when the block is at the distance of .1m from equilibrium. Assume no friction between the block and the table. Force is 8.67N. Also mass
asked by Andrea 
Probability
Two fair coins are flipped simultaneously. This is done repeatedly until at least one of the coins comes up heads, at which point the process stops. What is the probability that both coins come up heads? I think it would be 1/2 but the answer is 1/3 and I
asked by Anonymous 
Algebra II (check)
Write the expression m^7/9 in radical form. 9sqrt m^7 (answer)
asked by Jon 
english
For Language Arts I have to write a two voice poem about the holocost. It has to be very serious. Everytime I give my teacher the poem she gives it back to be and says that I don't know how to start the beggining of seriously. So, how should I start the
asked by Taylor 
Physics
A pilot must fly his plane to a town which is 200 km from his starting point in a direction 30 degrees N of E. He must make the trip in 1/2 hr. An 80km/h wind blows in a direction 30 degrees E of S. Find the speed of the plane relative to the ground, the
asked by Anonymous 
Physics
A boat is at a point 120km West and 60km South of its destination. It sails in water which has a current of 20km/h North. In order to arrive at the destination, the captain decides to head the boat due east at 50km/h until he reaches a point due South of
asked by Anonymous 
8th math
What are the odds of having a coin land tails up on 4our consecutive tosses of the coin. I took (1/2)^4 and got 1/16 but my teacher counted it wrong is 1/16th right?
asked by Gina 
Physical science
What formula's should I use to solve these problems? A 1.04x10^3 kg car accelerates uniformly from rest to 12 m/s in 2.16 seconds. a) What is the work done on the car in this time interval? Answer in Joules. b) What is the power delivered by the engine in
asked by Christy 
math
How many capsules, each containing 250mg, are needed to provide 50mg/kg/day for 10 days for a person weighing 176 pounds?
asked by melissa 
Algebra II
Find the exact solutions to 6x^2+x+4=0 by using the quadratic formula. x=b+sqrtb^24ac/2a 1+sqrt1^24(6)(4)/2(6) 1+sqrt95/12 195/12 96/12 x= 8 1+95/12 94/12= 7.8333.. [8, 7.83](answer)
asked by Jon 
algebra
^5 squareroot of x^20 *my answer x^4 ^3 squareroot of 729/343 my answer: couldn't figure it out use rational exponents to write ^3 squareroot of x * ^5 squareroot of 4x my answer: ^15 squareroot 4x^8
asked by reuben 
Chemistr repost
Determine the cell potential (in V) for a platinum electrode in an acidic solution of 0.004M H+(aq), 3.226M ClO4(aq) and 4.445M ClO3 (aq) ions, coupled to a gold electrode in 3.238 M Au3+ (aq) at 307.10 K. Im confused about the mulitple molarities given
asked by Matt 
Math
I have no idea how you would do this problem: Express this expression as a rational number in lowest terms. (1000!999!998!)/(1000!+999!+998!)
asked by Katie 
Physical Science
After a car is driven for some distance, why does the air pressure in the tires increase?
asked by Rachel 
science
How is science related to penicillin?
asked by sam 
business
consider two successful small businesses.Outline what it is about the way tey satisfy their customers'wats and needs to makes them successful.
asked by sam 
Chemistry
Redox Reactions Can anyone help predict the reaction that will take place when Gold is put into a solution of Hydrochloric Acid?
asked by Anonymous 
Algebra II (check)
Use synthetic division to find (2x^3  5x^2 + 7x  1). _12 5 7 1 2 3 _____________ 2 3 41 2x^2  3x + 4(answer)
asked by Jon 
Math
Can anybody translate (y + 3)(y 2)
asked by Ron 
MATH
5. For the decimal 8.62354: What is the place value of 5? A) Hundredths B) Thousandths C) Tenthousandths D) Hundredthousandths Is it D
asked by AJ 
Algebra II (check)
Assume that no denominator equals 0. (2x3)^2 = 2x * 2x 3 * 3 = 4x9(answer)
asked by Jon 
Math
Can 89/13 151/11 or 223/23 be simplified? I think none of the 3 can be simplified
asked by AJ 
Trig Equation
Solve for x (exact solutions): sin x  sin 3x + sin 5x = 0 ¦Ð ¡Ü x ¡Ü 0  Now, using my graphics calculator, I discovered that the following equation has 5 solutions. I have managed to come up with 3 of them but I'm having trouble finding the
asked by sqleung 
Trig
Can somebody please help me find the domain of: 1 / cos4x If there are any working out, could you be kind enough to show your steps? Thankyou. All help is of course, appreciated.
asked by sqleung 
math
THE MASS OF THE SUN IS ABOUT 10^27 METRIC TONS , OR 10^30 KILOGRAMS . HOW MANY KILOGRAMS ARE IN ONE METRIC TON ?
asked by mota 
math
THE DISTANCE FROM EARTH TO MOON IS ABOUT 22^4 MILES . THE DISTANCE FROM EARTH TO NEPTUNE IS ABOUT 22^7 MILES . WHICH DISTANCE IS GREATER ? ABOUT HOW MANY TIMES GREAT ?
asked by mota 
physics
A 62.0 kg diver falls from rest into a swimming pool from a height of 3.50 m. It takes 1.92 s for the diver to stop after entering the water. Find the magnitude of the average force exerted on the diver during that time.
asked by rory 
math
whats the integral of e^(3sqrt(x))? i think i'm supposed to use substitution but i don't know what to substirute, i tried u= x^(1/3) but it didn't work out, please help!
asked by belinda 
Algebra II
Write 36x^2360x25y^2100y=100 in standard form. Then state whether the graphs of the equation is a parabola, circle, ellipse, or hyperbola. I started with: 36(x^2 10x+25)25(y^2+4y+4)=100+36(25)25(4) which leads to: 36(x^210x+25)/900 
asked by Lucy 
science/elements
i know that the mass of barium is 137.33 but i have to make a presentation to my class and i don't know how i would say the mass of it? 137.33 ____ whats it measured in?
asked by mae 
Algebra II
Solve 2x^2=3x+2 by graphing. If excat roots cannot be found, state the consecutive integers between which the roots are located. I don't have an answer but I made a table and plugged in these values for x respectfully: 1/4, 2/4, 3/4, 1, 0 Thats all I
asked by Jon 
Algebra II
Solve x^22x=24 by factoring. x^22x=24 x^22x24=0 (x2)^2 (x+6)=0 x=2 or x=6 [6,2](answer)
asked by Jon 
math
An antibiotic is reconstituted with 128ml of water to yield 250mg/5ml. A) If the child weighs 66 pounds what will the dose be at 5mg/kg/dose? B) If the medication is given qid x 10 days, will the 150ml bottle be enough?
asked by melissa 
Science
How do scientists contribute to quartz watches?
asked by jonh 
Elementary Mathematics 2
Counting by ones, counting by tens, and counting by groups and singles: I was rather curious about how these methods of counting can be used to coordinate concepts and oral and written names for numbers.
asked by Tee 
organic chemistry
why is it necessary to protonate the carboxylic acid in an acidcatalyzed esterification? What is its purpose?
asked by PIN 
french
translate this Le bonheur ici bas n'a pas de prix Am I right in saying"happiness here doesn't have a price". If not, what is the translation and two, what does "bas" mean in this context?
asked by Kurst 
ICD9CM codes health care
please check my answer thanks for the help :) Verifying the accuracy of ICD9CM and HCPCS codes are an important function in what ? My answer is maintence of the OASIS data set
asked by Lucie 
math
Find the fivenumber summary of the following set of numbers. 335, 233, 185, 392, 235, 518, 281, 208, 318
asked by diane 
algebra
You may have to convert from feet to miles several times in this assignment. You can use 1 mile = 5,280 feet for your conversions. 1.Many people know that the weight of an object varies on different planets, but did you know that the weight of an object on
asked by frank 
Math
Give the place value for the indicated digit. 8 in the number 138,350 A) Ones B) Tens C) Hundreds D) Thousands
asked by Sue 
Algebra II (check)
Assume that no denominator equals 0. (8y^3+27)/(2xy10y+3x15) I don't know how to solve this one.
asked by Jon 
Algebra II (check)
Assume that no denominator equals 0. sqrt 16x^2y^4 = sqrt (4x)y^2 = 4xy^2(answer)
asked by Jon 
chemistrycalibration curve
what does the calibration curve tell you about the spectrophotometer?
asked by stew 
math
Write 0.21 as a percent. A) 0.21% B) 2.1% C) 210% D) 21% is the answer D
asked by Sue 
MATHS
WHAT DOES THEORETICAL PROBABILITY MEAN HOW DO I WORK IT OUT?
asked by Rosh 
Chemistry
Determine the cell potential (in V) for a platinum electrode in an acidic solution of 0.004M H+(aq), 3.226M ClO4(aq) and 4.445M ClO3 (aq) ions, coupled to a gold electrode in 3.238 M Au3+ (aq) at 307.10 K. Im confused about the mulitple molarities given
asked by Matt 
Biology
Beetles: Why is the direction that the antennae of beetles point in, significant? Thanks!
asked by Seema 
Physics
Why do your vowels examples ("aaah", "eee", "uhh") sound different then when I make them? Explain. Tension, mass density and the length of our vocal cords differ so would that be the reason why they sound different? For instance: a child's voice is usually
asked by Andrea 
Algebra II
Write an equation for the ellipse with end points of the major axis at (7,1) and (7,1) and end points of the minor axis at (0,5) and (0,3). I do not know how to start this. There are no examples in my book that I can study. Could you show me how to set
asked by Lucy 
Slope
Find the slope of a line that is perpendicular to a line whose slope is (1) 0 (2) has no slope. TIA
asked by Jen 
math
A "super ball" dropped from a height of x feet bounces to a height y that is 80% of x. Can anyone please teach me how to find its numerical, algebraic, and graphical representations? Thanks a lot!!!
asked by Lusi 
algebra
^440 squareroot (a+b)^440 my answer: a+b add. squareroot 7a + 4 squareroot 28a^3 ?
asked by reuben 
calculus
what is the integral of x^2x+6/x^33x? the process involves partial fractions, and the answer is supposed to include ln and arctan... i just don't know how to get there.
asked by belinda 
science
how is science related to quartz watches?
asked by jonh 
science
what types of scienists are involved in quatz watches?
asked by jonh 
precal
A "super ball" dropped from a height of x feet bounces to a height y that is 80% of x. Can anyone please teach me how to find its numerical, algebraic, and graphical representations? Thanks a lot!!!
asked by Lusi 
science
how is science related to hamburgers?
asked by jonh 
physical science 2
in the troposphere, air temperature usually decreses with height by 6.5 c per kilometer. if the air temperature near the ground is 20 c what would you expect the temperature at the tropopause to be, assuming a tropopause height of 12km?
asked by jessica 
business
10 good business ideas
asked by jonh 
sam
what types of scientists are involved in penicillin?
asked by jonh 
science
How do scientist contribute penicillin?
asked by sam 
cook
a food recipe using stemming?
asked by sam 
science
plz answer whar are quantitative properties? Which states of matter are considered fluids? list 4 properties of fluids? thankz alot
asked by plz help 
Math
Beginning with a tank containing 8075 gallons of gasoline, more gas is added at a rate of 5 gallons per minute, while alcohol is added at a rate of 10 gallons per minute. When the mixture is 10% alcohol, how many gallons of the mixture are in the tank? Is
asked by Anonymous 
binary system
how does the binary system work?
asked by Anonymous 
Elementary Mathematics
How can a child who has not yet developed baseten concepts understands quantities as large as, say, 85? Contrast this with a child who understands these same quantities in terms of baseten groupings.
asked by Tee 
Geography
I've been searching all over the web for this, but cannot find specific details. How did the former Soviet Union encourage its expansive population policy? Thanks in advance.
asked by Natalie 
Health insurance
Please check my answer thanks for your help :) Hospital that are excluded from the Medicare acute care PPS such as children hospitals are paid based on A reasonable cost B fee schedules C global payments C bundled payments My answer is # A
asked by Lucie 
Health insurance
Please check my answer thanks for the help :) If an enrollee uses more services than originally assumed per the PPPM calculation then what would the paln do? A. show a profit for that period B. show a loss for that period C need a contract renegotiation D.
asked by Lucie 
please check my answer health insurance
please check my answer thank you for your help :) Prospective payment system determines payment before services are received True or False My answer is True
asked by Lucie 
Algebra II (check)
Assume that no denominator equals 0. sqrt12  sqrt18 + 3sqrt50 + sqrt75 = (sqrt2^2*3)  (sqrt2*3^2) + (3sqrt2*5^2) + (sqrt3*5^2) = (sqrt2^2*sqrt3)  (sqrt3^2*sqrt2) + (3sqrt5^2*sqrt2) + (sqrt5^2*sqrt3) = (2*sqrt3)  (3*sqrt2) + (3sqrt5*sqrt2) + (5*sqrt3) =
asked by Jon 
Algebra II (check)
Assume that no denominator equals 0. 2+i/13i = 2+i/13i = (2+i/13i) * (1+3i/1+3i) = (2+3i^2)/(19i^2) = (2/1)  (1/3i) = 21/3i(answer)
asked by Jon 
Algebra II (check)
Solve: sqrt3x+6 + 4 =< 7 sqrt3x+6 + 4 =< 7 subtract 4 from both sides sqrt3x+6 =< 3 subtract 6 from both sides 3x/3x =< 3x/3x x =< 1 (answer)
asked by Jon 
Chemistry
Which substance will be attracted to a charged balloon NH3 or CH4? Why?
asked by Jessica 
sci
Would someone critique my hypothesis? question:Although most salamanders have four legs, the aquatic salamander shown below resembles an eel. It lacks hind limbs and has very tiny forelimbs. Propose a hypothesis to explain how limbless salamanders evolved
asked by Trish 
Physics
I have to compare and contrast three types of tires, and relate them to physics. I've chosen: Racing tires Winter tires All season tires I've chosen to compare them on: Tire tread pattern Rubber compound ??? As you can see, I need something else to
asked by Lucy 
Algebra II (check)
Assume that no denominator equals 0. 5x^3(7x)^2 = 5*7*7+x^3+x^2 = 245x^5(answer)
asked by Jon 
Math
Do the indicated addition. 3 + 4 + 8=15 right 7 12 15 17
asked by AJ 
8th grade astronamy apparent magnetudes
whats the differences in magnitudes of the sun and sirius?
asked by AJ 
math
USING THE MANUFACTURING TERMS BELOW , TELL HOW MANY DOZEN IN A GREAT GROSS. HOW MANY GROSS ARE IN A GREAT GROSS ?  1 DOZEN = 12^1 ITEMS 1 GROSS = 12^2 ITEMS 1 GREAT GROSS = 12^3 ITEMS
asked by mota 
MATH
substract 8gal 7qt3gal 2qt simple form is the answer 5gal 3 qt 4 gal 5 qt 6 gal 1 qt 5 gal 3 qt 5 gal 5.5 qt
asked by Sue 
math
Write in decimal form. 8 583/10,000 85,830 8.583 8.0583 8.00583
asked by Sue