Questions Asked on
July 22, 2011

Calculus
I need help setting up the equation. The portion of the graph y = ex between x = 0 and x = ln 3 is rotated around the y axis to form a container. The container is filled with water. Use n = 4 subintervals and midpoints to approximate the work required to
asked by Kay 
Calculus
A stone is dropped from the edge of a roof, and hits the ground with a velocity of 145 feet per second. How high (in feet) is the roof
asked by Julie 
SQL
Display a list of all instructors, showing their ID, name, and the number of sections that they have taught. Make sure to show the number of sections as 0 for instructors who have not taught any section. Your query should use an outerjoin, and should not
asked by joe 
math
a committee of 5 people is to be selected from a group of 6 men and 9 women. If the selection is made randomly, what is the probability that the committee consists of 3 men and 2 women?
asked by deborah 
chemistryB
How much heat is required to decompose 25.5 grams of NaHCO3? 2NaHCO3(s) + 129 kJ 2Na2CO3(s) + H2O(g) + CO2(g)
asked by jane doe 
statistics
The weight of 14 healthy newborn children was measured. The sample mean was 7.5 pounds with corresponding standard deviation 1.2 pounds. These babies are from one hospital and we want to test whether the babies born at this hospital are different in weight
asked by christinaGallas 
chem
an aq. solution(NaCl) made by using 133g diluted to a total solution volume of 1 L.Calculate the molarity, molality & mass % of the solution(density of solution = 1.08g/mL) [ans: M=1.92M, m=2.0m, 10.4 %] i need the calculation work bcus my ans is
asked by lily 
Chem
Na2CO3 + 2HCl = CO2 + H2O + 2NaCl. What mass of CO2 is produced from the reation of 2.94g Na2CO3 with excess HCI?g
asked by Terr 
physics
an 8g bullet is shot into a 4kg block, at rest on a frictionless surface. the bullet remains lodged in the block. the block moves into a spring and compresses it 9.40cm. the force constant of the spring is 1000 N/m. a) what is the initial velocity of the
asked by Anonymous 
science
Assuming that radiation with a wavelength = 15.0 cm is used, that all the energy is converted to heat, and that 4.184 J is needed to raise the temperature of 1.00 g of water by 1.00 degree celcius, how many photons are necessary to raise the temperature of
asked by Breanna 
debating
Our debating topic is 'That good news is not news.' I am on the negative team so I am saying that good news is, in fact news. I personally believe the good news really isn't news and so I'm struggling to debate for the negative team. I am the first
asked by Amelia 
statistics
Two dice are rolled and two fair coins are tossed. Let X be the sum of the number of spots that show on the top faces of the dice and the number of coins that land heads up. The expected value of X is _____ .
asked by mike 
Mathprobability
A simple dartboard has three areas… the main board has a radius of 11 inches, there is a circle with a radius of 5 inches, and the bullseye has a radius of 2 inches. What is the probability of a random dart landing inside the bullseye? Round to the
asked by Jen 
Psychology
Cognitive psychology can best be described as: A) The study of higher mental processes. B) The therapeutic application of critical thinking. C) The area of psychology which attempts to reduce judegmental thinking. D) A subspecialty of psychology based
asked by Tisha 
chemistry
find the maximum value of h2(g)in grams that would be expected to form by reacting 6.54g of zinc with 50ml of 0.1M of HCl.
asked by kb 
Math grade 12
the function f(x)= o.005t^2+0.8t+12 models the relationship between a certain vehicle’s speed and fuel economy, where is the fuel economy in kilometres per litre and x is the speed of the vehicle in kilometres per hour. Determine the rate of change in
asked by Anonymous 
Chemistry
4 FeS(s) + 7 O2(g) ==> 2 Fe2O3(s) + 4 SO2(g) 7.82 moles of FeS are required to produce 3.91 moles of Fe2O3 What is the maximum number of liters of Fe2O3(s) that can be made from 10.95 L of O2(g) and 18.64 L of FeS(s) at STP?
asked by Katie 
Physics
Derive a function that gives the final speed of the cart as a function of the masses, ramp angle and distance up the ramp that the cart moves. Use conservation of energy to do thisno kinematics or Newton's Laws. I have 3 trials ,, 3 angles and 3 masses (
asked by AfterLife 
statistics
The height of 18yearold men are approximately normally distributed, with mean of 68 inches and a standard deviation of 3 inches. What is the probability that an 18yearold man selected at random is between 67 and 69 inches tall? Round your answer to the
asked by kinshassa 
math
whats the answer of 27/7 mixed into a number
asked by sesy 
early childhood
The use of _______ characterizes the teacher's method of initiating and directing children's verbal responses in a format that can confuse children from nonmainstream cultures. A language modeling B. evencasts c. school language d. language conventions i
asked by red 
Mathematics
A card is selected at random from an ordinary pack of 52 playing cards.state the probability the card is a club.
asked by Ray 
algebra
The formula R =−0.0026? + 4.0807 can be used to predict the world record, in minutes, for the 1500m run t years after 1900. Determine (in terms of an inequality) those years for which the world record will be less than 3.8 min.
asked by cat 
geometry
write and equation on point sloop form for the perpendicular bisector of the segment with endpoints A(3,3) and B(5,6)
asked by Lydia 
chemistry
A sample of metallic element X, weighing 4.315 g, combines with 0.4810 L of Cl2 gas (at normal pressure and 20.0¢ªC) to form the metal chloride with the formula XCl. If the density of Cl2 gas under these conditions is 2.948 g/L, what is the mass of the
asked by Hannah 
Chemistry
What mass of water, in grams, would have to be decomposed to produce 25.1 L of molecular oxygen at STP?
asked by Katie 
math
A car company is offering car loans at simple interest rate of 14%. Find the interest charged to a customer who finances a car loan of $34000 for 2 years
asked by bobby 
algebra
I am tring to work these out and i have been in this for hours it is not clicking thanks for all the help. the question is: Snookers lumber can convert logs into either lumber or plywood. In a given day, the mill turns out twice as many units of plywood as
asked by babs 
Word Problems
If your car gets 18 miles per gallon of gasoline, how many pints of gas will you need to take a 698 mile trip? I no that 1pt = 480ml and 1g= 3840 ml so do I x 18 miles per gallon by the amount of pints in a gallon?
asked by Rina 
math
find the eqt. of tangent to the curve y=x^2+2x10.[ans:y=2x10] but my ans is y=9. if im wrong could you show the calculation.
asked by fanny 
math
find the eqt. of tangent to the curve y=x^2+2x10 @ the point where the curve cuts the yaxis.[ans:y=2x10] how do i do this because they didn't give me the point...?
asked by rob 
biology
(Which of the following would least likely induce thirst) a)Dry pharynx b)Decrease blood volume c)decrease blood pressure d)decreased blood osmolarity
asked by lol 
algebra
Essay. show all work. A gardener wants to create a triangluar garden in the shape of a right triangle with shortest legth x3y ft. and the middle length side x+6y ft. What ia an algebraic expression for the area of the garden? be sure to multiply this out
asked by Rocky 
MATHtoo confusing :(
Last fall, a gardener planted 64 iris bulbs. She found that only 56 of the bulbs bloomed in the spring. a.) Find the empirical probability that an iris bulb of this type will bloom. Give answer as a fraction in lowest terms. b.) How many of the bulbs
asked by Jen 
Calculus
The base is an equilateral triangle each side of which has length 10. The cross sections perpendicular to a given altitude of the triangles are squares. How would you go about determining the volume of the solid described? The textbook answer is
asked by Chris74 
MATH
The property restoration company PuroServ is considering switching to new dehumidifiers. Their market research, considering the cost of the new machines and their efficiency, tells them that the switch would give them a 54% chance of making a $20,000
asked by Jen 
Biology
Briefly describe what effect you expect each of the following variables to have on enzymatic activity. 1. pH of 3.0 2. decrease in temperature 3. increase in substrate concentration 4. increase in enzyme concentration 5. addition of phenylthiourea(PTU)
asked by Jerome 
English
Could you please check these few sentences? Thank you. It's urgent! 1) Though you are not a qualified Spanish teacher, I'll be happy to have conversation classes with you during my stay in Madrid. 2) I hope we can meet around 5 p.m. every day starting from
asked by Henry2 
chem
A solution prepared by dissolving 20.2 mL of CH3OH in 100mL of water @ 25 celcius. The final volume of the solution is 118 mL. Calculate the % by mass. density CH3OH[0.782g/mL], H20[1g/mL] @ room temp.
asked by rita 
math
d/dx x(1+y)^(1/2) + y(1+x)^(1/2)=0. Can some1 show me the calculation because i didn't get like the answer. [ans=1/(1+x)^2 but my calculation=(sqrt(y+1) (2 sqrt(x+1) sqrt(y+1)+y)/(sqrt(x+1) (2 sqrt(x+1) sqrt(y+1)+x)]
asked by will 
biology
You are attempting to determine whether a plantderived processed food sample (for example, a corn chip) contains material from a geneticallymodified organism (GMO). First, you crush the sample and attempt to extract DNA from it. Next, you perform PCR
asked by patricia 
algebra
could someone please help solve by substitution 8x3y=88 4x+48=y
asked by babs 
algebra
A disc jockey must play 14 commercial spots during one hour of radio show.Each commercial is either 30 seconds or 60 seconds long. If the total commercial time during 1 hour is 11 min, how many 30 second commercials were played that hour? How many
asked by babs 
algebra
Soybean meal is 12% protein; Cornmeal is 6% protein. How many pounds of each should be mixed together in order to get 240lb mixture that is 8% protein?
asked by babs 
statistics
Two dice are rolled and two fair coins are tossed. Let X be the sum of the number of spots that show on the top faces of the dice and the number of coins that land heads up. The expected value of X is _____ .
asked by mike 
Course CJA/393  CRIMINAL ORGANIZATIONs
Define organized crime
asked by Anonymous 
Math  Probability
what is the probability of getting two sets of 8 digit numbers having 5 digit are the same number and order.
asked by Tracy 
Physics
A ray of light falls on one of two plane mirrors placed at an angle of 90 degrees. show that the direction of the ray after two reflections is parallel to the direction of the original ray.
asked by jane 
it
What is the meaning of it and marketing come together.i mean what is the result .why does marketing need it(information technology)?thank you.
asked by star sorbet 
english
Pretend that you writing to the editor of your local newspaper. Your purpose is to convince its readers that rather than solely relying on email, people should mail a letter to their loved ones every now and then. Following is your first draft. Every now
asked by Gabe 
Math
Given that the formula is y=9cos12x+9 What is k in radian?
asked by Kate 
statistics help please
For a random sample of 10 men, the mean head circumference is x = 57.3 cm and the sample standard deviation is s = 2 cm. The standard error of the sample mean is: a. 0.200 b. 0.447 c. 0.500 d. 0.632
asked by toyman 
Mathematics
The standard deviation of given population is 4.5 with a mean of 60 and the refit population has a standard deviation of 5.2 with a mean of 75. Calculate the coefficient of variation for both populations and comment on the results.
asked by Ray 
soil
soil temperature as its varies with dept
asked by otiotio taofik 
math
find the coordinates of the point where the tangent to the curve y=x^3 +x +2 at the point (1,4) meets the curve again. [ans:2,8] pls help me i don't understand the question....
asked by rita 
chemistry
find the maximum value of h2(g)in grams that would be expected to form by reacting 6.54g of zinc with 50ml of 0.1M of HCl.
asked by lol 
healthcare
Health Care Costs For Consumers with dietary supplement. I need some basic points and to start my seach on this point. Thank you
asked by Anonymous 
Psychology
I have to describe the impact of bias on the lives of individuals. I know that bias can distort selfperception and causal attribution. I need help to properly explain this.
asked by Linda 
Math
If the probability of seeing moose in a day in a certain region of Alaska is 0.37, what is the probability of not seeing any moose in a day there?
asked by Jen 
Math
If the odds of winning a raffle are 17:214, what is the probability of winning?
asked by Jen 
algebra
solve by elimination x+6y12 x+7y=1
asked by babs 
criminal law
Describe current parole and mandatory release policies
asked by D 
algebra
solve by elimination x+6y=12 x+7y=1
asked by babs 
math
side of the cube increasing at rate of 6 cm/s. find the rate of increase of the volume when the length of a side is 9 cm.[ans 1458cm^3/s] my answer: ~729x6=4374cm^3/s i need some1 show me the calculation if im wrong.
asked by susan 
math
in a large survey, it was discovered that 1 out of every 5 adults visits disney world every year. if 30 adults are randomly selected, what is the probability that exactly 7 of them will visit disney world this year.
asked by deborah 
math
in a certain geometric sequence, the third term is 8 and the sixth term is 125. what is the first term?
asked by deborah 
math
the distance x cm and y cm are related by the eqt. 1/x+1/y=1/9, if x is increasing at a rate of 8 cm/s, calculate the rate at which y is changing when x=15. [ans:18]
asked by mat 
Business
Explain how these laws intertwine: Title VII of the Civil Rights Acct of 1964, Civil Rights 1991, Opportunity act 1972, Age Discrimination of 1967, Disabilities act, immigration reform and control act of 1986, Fair labor standards act Also explain how the
asked by Angel 
english
Pretend that you writing to the editor of your local newspaper. Your purpose is to convince its readers that rather than solely relying on email, people should mail a letter to their loved ones every now and then. Following is your first draft. Every now
asked by Gabe 
math
in a certain geometric sequence, the third term is 8 and the sixth term is 125. what is the first term?
asked by deborah 
biology
lipid soluble must be oxidized before they are excreted from.otherwise the toxins would not be able to pass through the a)bowman capsule b)red blood cells c)cell membranes d)cytoskeleton
asked by kb 
homework statistics
Consider a random sample with sample mean x. If the sample size increased from n = 40 to n = 360, then the standard deviation of x will: a. remain the same b. increase by a factor of 9 (will be multiplied by 9) c. decrease by a factor of 9 (will be
asked by Jackay 70 
math
the tangent yo the curve y=x^2 +5x 2 @ the point (1,4)intersect the normal to the same curve @ the point (3,8) at the point P.Find the coordinates of point P.[ans: 1/3,16/3] just give me some hint to calculate this solution.
asked by rob 
physics
how to explain the relationship between the mass of the rotating object and its period?
asked by nanana :D 
math
a motorist drives to a city in 4 hrs. and returns by another route which is 26 mi. longer. on the return trip he traveled 5 miles per hour faster and took 4 hours and 12 min. . find the length of the shorter route.
asked by mac 
math
reiny, could you give the motorists two trips another try. it appears you can work it . i'd appriciate seeing an answer. thanks.
asked by mac 
Math
23 college sophomores at Crocodile Community College, 12 preferred pepperoni pizza, 7 preferred supreme, and 4 preferred cheese. If we picked a college sophomore at Crocodile Community College at random, what is the probability that he or she would prefer
asked by Jen 
Math
Suppose you invest your money into an account that pays 4.0% per year compounded quarterly. How long (in years) will it take for your money to triple? Round your answer to one decimal place. I know I use this... A=P(1+r/n)^nt But to go from there and get
asked by Tina 
MATH, PLEASE HELP!
Suppose you invest your money into an account that pays 4.0% per year compounded quarterly. How long (in years) will it take for your money to triple? Round your answer to one decimal place. I know I use this... A=P(1+r/n)^nt But to go from there and get
asked by Tina 
Math
A certain drawing states that the odds of winning are 117:168. What would be the odds against winning? would it be 168/117?
asked by Jen 
Math
The property restoration company PuroServ is considering switching to new dehumidifiers. Their market research, considering the cost of the new machines and their efficiency, tells them that the switch would give them a 54% chance of making a $20,000
asked by Jen 
Math
The property restoration company PuroServ is considering switching to new dehumidifiers. Their market research, considering the cost of the new machines and their efficiency, tells them that the switch would give them a 54% chance of making a $20,000
asked by Jen 
Math
A certain drawing states that the odds of winning are 117:168. What would be the odds against winning? Would it be 168/117??
asked by Jen 
MATH
The property restoration company PuroServ is considering switching to new dehumidifiers. Their market research, considering the cost of the new machines and their efficiency, tells them that the switch would give them a 54% chance of making a $20,000
asked by Jen 
Math
Time Height above ground 0 45 3 65 6 80 9 85 12 80 15 65 18 45 21 25 24 10 27 5 30 10 33 25 36 45 I know the following things: The minimum is 5 while the maximum is 85. amplitude: 855/2 = 40 period =360/45 = 8 vertical translation = 5 + 40 = 45 But I
asked by Kate 
chemistry
A sample of metallic element X, weighing 4.315 g, combines with 0.4810 L of Cl2 gas (at normal pressure and 20.0¢ªC) to form the metal chloride with the formula XCl. If the density of Cl2 gas under these conditions is 2.948 g/L, what is the mass of the
asked by Hannah 
Fund. of Electronics
What is the peak to peak Voltage across a 10 kilo ohm resistor that dissipates 50 mW?
asked by Brendon 
geometry
if 6, 10, and 12, and 9, and x are the lengths of the coresponding sides of two similair triangles, what is the value of x?
asked by Lydia 
intermediate algebra
Short answer find the quotient 6x^3x^27x9  2x+3
asked by mike 
math
x+y=4 xy=2
asked by Anonymous 
early childhood
need homework help with this question an example of triadic interaction in mexicanamerican is evident in the statement: a." name the colors in Maria's dress B. Tell grandpa how much you like your new tricycle c. count all the teddy bears d. Let's have
asked by red 
biology
(Which of the following would least likely induce thirst) a)Dry pharynx b)Decrease blood volume c)decrease blood pressure d)decreased blood osmolarity
asked by kb 
college
Advocates of the death penalty recognize that no system is perfect and that applying the death penalty runs a small risk of executing someone who is innocent. Is this a price society should be willing to pay?
asked by china 
soc120
Advocates of the death penalty recognize that no system is perfect and that applying the death penalty runs a small risk of executing someone who is innocent. Is this a price society should be willing to pay?
asked by china 
chem
A solution prepared by dissolving 20.2 mL of CH3OH in 100mL of water @ 25 celcius. The final volume of the solution is 118 mL. Calculate the % by mass. density CH3OH[0.782g/mL], H20[1g/mL] @ room temp.
asked by susan 
math
d/dx x(1+y)^(1/2) + y(1+x)^(1/2)=0. Can some1 show me the calculation because i didn't get like the answer. [ans=1/(1+x)^2 but my calculation=(sqrt(y+1) (2 sqrt(x+1) sqrt(y+1)+y)/(sqrt(x+1) (2 sqrt(x+1) sqrt(y+1)+x)]
asked by jess 
biology
lipid soluble toxins must be oxidized before they are excreted from.otherwise the toxins would not be able to pass through the a)bowman capsule b)red blood cells c)cell membranes d)cytoskeleton
asked by lovergirl 
Math
A community 5K run will award $50 to the winner. 60 people enter the race, and they each pay an entry fee of $20. Assuming they are all equally likely to win, what is a fair price for the competition? Round to the nearest cent.
asked by Jen 
Law
why would the "Fleeing Felon Doctrine" be declared unconstitutional?
asked by Stacy 
geometry
Use the distance formula and the Pythagorean theorem to find the distance, to the neearest tenth, from R(6,5) to U(2,6)
asked by Lydia 
economics
The Money Multiplier (MM) is exemplified. Why do you think the FED evaluates the money multiplier when making decisions with regard to the money supply? What function does the money supply serve in our economy to influence certain economic variables? Why
asked by Gbrown 
careers in early childhood education
Children's behavior is at once specific and: a.)fragmented b.)integrated c.)inappropriate d.)disjointed
asked by lachelle mitchell 
algebra
factor out the greatest common factor. Please show all work. 15wx20wy25wz
asked by shir 
math
lily left house at 11.43 am and travelled to town, a distance of 31km. She arrived there at 12.09pm. What was the average speed in km/h and m/s.[ans:71.54 km/h & 19.87 m/s] my answer is ~31/1.1=28.18 km/h ~31000/3960=7.83 m/s can some1 show me the
asked by susan 
math
find 3/5 of 30
asked by manny 
math
mr. pursley, have you ever worked geo., trig. etcwith no calu.s with the heat on , when it had to be right?wheather you blew up your target or something else or the bld. collapsed or was built in the correct place? i'm not an answer grazer, but qam an
asked by mac 
algebra
solve by substitution 2x+6y=30 9x+y=61
asked by babs 
Business
Explain how the number of employees in the company affects the company's status if the company is not in compliance. Also explain how federal legislation laws intertwine.
asked by Angel 
english
can you check to see if i identified the verbs correctly and used the correct tense. 1. For as long as I can remember, education has been a constant factor in my life. ( present progressive) 2. I received my first academic award in elementary school and it
asked by Ashley 
Physics
A lady looks at herself in a concave makeup mirror whose radius is 80cm.One of her eyes is on the axis of the mirror,16cm in front of the vertex.(a)Find the position and magnification of the image of the eye.(b) Is the image real or virtual?erect or
asked by jane 
Geometry
Use the distance formula and the Pythagorean theorem to find the distance, to the neearest tenth, from R(6,5) to U(2,6)
asked by Lydia