Questions Asked on
July 27, 2011

Physics
An object 0.600 cm tall is placed 16.5 cm to the left of the vertex of a concave mirror having a radius of curvature of 22.0 cm. (a) Draw a principleray diagram showing the formation of the image. (b) Calculate the position, size, orientation (erect or
asked by Chloe 
physics
Consider a boy standing on a building that is 500m height and another boy standing on the ground. If the boy on the ground throws a ball to the boy standing on the building, with what vertical velocity must the ball be thrown such that it reaches the boy
asked by divya 
Physics
A 400.0mwide river flows from west to east at 30.0 m/min. Your boat moves at 100.0 m/min relative to the water no matter which direction you point it. To cross this river, you start from a dock at point A on the south bank. There is a boat landing
asked by Kyle 
physics
one electron travels twice as fast as another. Which has the longer wavelength?
asked by Anonymous 
Physics
A speedboat, starting from rest, moves along a straight line away from the dock. The boat has a constant acceleration of +3.00 m/s2. A siren on the dock is producing a 755 Hz tone. Assuming that the air temperature is 20.0oC, what is the frequency of the
asked by Chloe 
physics
A 3.0mlong rigid beam with a mass 130 kg is supported at each end. An 90 kg student stands 2.0 m from support 1. (beam 1 is to the left, and beam 2 is on the right.) How much upward force does support 1 exert on the beam? How much upward force does
asked by falcon306 
Statistics
If mean of 1, 2, 3,  n is 6n/11, then n is
asked by Sharon 
Chemistry
What type of isomers are [Pt(NH3)2Br2]Cl2 and [Pt(NH3)2BrCl]BrCl? A. Structural B. Geometric C. Linkage D. Coordination E. Optical
asked by Neha 
Life Orientation
In 1015 lines critically discuss 5 ways in which the Xenophobia impacts on the community.
asked by Zanele Maleka 
Math
The formula h=48t16t^2 gives the height, h, in feet, of an object projected into the air after t seconds. If an object is propelled upward, at what time(s) will it reach a height of 32 feet above the ground?
asked by Robert 
Statistics
The Computer Anxiety Rating Scale (CARS) measures an individual's level of computer anxiety, on a scale from 20 ( no anxiety) to 100 (highest level of anxiety). Researchers at Miami University administered CARS to 172 business students. One of the
asked by Marge 
Physics
A uniform crate with a mass of 16.2 kg rests on a floor with a coefficient of static friction equal to 0.571. The crate is a uniform cube with sides 1.21 m in length. what is the minimum height where the force F can be applied so that the crate begins to
asked by AfterLife 
math
A rectangular poster has an area of 190in(squared). The height of the poster is 1in. less than twice its width. Find the dimensions of the poster.
asked by Anonymous 
Math
Jane has only $1 and $5 in her wallet, and they total $79.00. If she has a total of 23 bills, how many of each bill does she have?
asked by Mark 
Math
A boat, which moves at 18 mph in still water, travels 14 miles downstream in the same amount of time it takes to travel 10 miles upstream. Find the speed of the current.
asked by Antione 
Math
Tickets to a game are $5 for adults and $2 for children. Six hundred tickets are sold for a total of $2160. How many adult tickets and how many children's tickets have been sold?
asked by Will 
MATH
A parking lot has 5 spots remaining and 5 different cars in line waiting to be parked. If one of the cars is too big to fit in the two outermost spots, in how many different ways can the five cars be arranged?
asked by Jennifer 
maths
how to solve cos70/sin20+cos57cosec332cos60?
asked by Anonymous 
Finance
Dr. Whitten has decided to purchase equipment that has a cost of $60,000 and will produce a pretax net cash inflow of $30,000 per year over its estimated useful life of six years. The equipment will have no salvage value and will be depreciated by the
asked by Juliette 
physics
assume that a hailstone at 0 degrees celsius falls through air at a uniform temperature of 0 degrees celsius and lands on a sidewalk also at this temperature. from what initial height must the stone fall in order to entirely melt upon impact?
asked by ann 
chemistry
nonane has a density of 0.79 g/mL and boils at 151 celsius. will it float or sink in water (density of 1.00 g/mL)
asked by melissa 
physics
describe the force board experiment to show how to obtain the resultant of two nonparallel coplanar force acting at a point.four forces of magnitude 10N, 5N, 4N, AND 6N acts on an oblect in the direction north. West, east and south respectively.find the
asked by jude 
math
a liquid form of penicillin is sold in bulk at a price of $ 200 per unit.If the total cost for x unit is C(x)=500000+80x+0.003X^2 and the production capacity is at most 30000 at a specified timed, how many of the penicillin must be manufactured and sold in
asked by Yuni 
differential calculus
a right circular cylinder has a fixed height of 6 units. Find the ratio of change of its volume(v) with respect to the radius(r) of its base.
asked by wen 
Math
Each of the numbers 0 through 26 is written on a piece of paper and all of the pieces of paper are placed in a hat. One number is selected at random. Determine the probability that the number selected is even. Note: 0 is considered an even number. I think
asked by Jen 
physics
A spring exerts a 17 N force after being stretched by 3.0 cm from its equilibrium length. By how much will the spring force increase if the spring is stretched from 5.0 cm away from equilibrium to 6.0 rm cm from equilibrium? I don't know how to approach
asked by falcon306 
algebra
An artifact was found and tested for its carbon14 content. If 79% of the original carbon14 was still present, what is its probable age (to the nearest 100 years)? Use that carbon14 has a halflife of 5,730 years.
asked by can some please help me with this one 
Math
Suppose an individual makes an initial investment of $2400 in an account that earns 8%, compounded monthly, and makes additional contributions of $100 at the end of each month for a period of 12 years. After these 12 years, this individual wants to make
asked by Anonymous 
Physics
Babe Ruth steps to the plate and casually points to left center field to indicate the location of his next home run. The mighty Babe holds his bat across his shoulder, with one hand holding the small end of the bat. The bat is horizontal, and the distance
asked by AfterLife 
Statistics
Determine the uppertail critical values of F in each of the following twotail tests: Á) á= 0.10, n1 = 16,n2 = 21 B) á = 0.05, n1= 16,n2 = 21 C) á= 0.01, n1 = 16,n2 = 21
asked by Marge 
business studies
katleho has a flair for languages and obtains good grades in these. She is an avid reader and spends a large portion of her allowance on magazines. She is a member of the school's debating team. She loves working with people and socialising with her peers,
asked by anonymous 
differential calculus
a right circular cylinder has a fixed height of 6 units. Find the ratio of change of its volume(v) with respect to the radius(r) of its base.
asked by wen 
PhysicsNeed Help fast!
Part 1 A 3m long pipe is in a room where the temperature is 20 degrees C. What is the frequency of the first harmonic if the pipe is closed at one end? Part 2 sound traveling in air at 23 degrees C enters a cold front where the air temp is 2 degrees C. If
asked by Megan 
Economics
Annual demand and supply for the Entronics company is given by: QD = 5,000 + 0.5 I + 0.2 A  100P, and QS = 5000 + 100P where Q is the quantity per year, P is price, I is income per household, and A is advertising expenditure. a. If A = $10,000 and I =
asked by Michelle Lawson 
Writing
My sister had asked me for some money to help get her out of debt. I did not feel right just giving her the money. My sister gathered all of her (possessive pronoun) credit card bills, and we sat down together to look over them. We found out that she
asked by Anonymous 
Statistics
The algebraic sum of the derivations of a frequency distribution from its mean is i) Always positive ii) Always negative iii) Zero iv) A non zero number
asked by Sharon 
Physics
An object, that is 3.25 mm high is placed 16 cm in front of a lens. The image produced by this lens appears 6.0 cm behind the object, as the figure shows. (a) What is the focal length of this lens and what type of lens is it? (b) What is the height of the
asked by Chloe 
Mathconfused!
A disc jockey has 12 songs to play. Seven are slow songs, and five are fast songs. Each song is to be played only once. In how many ways can the disc jockey play the 12 songs if: *The songs can be played in any order. *The first song must be a slow song
asked by Jen 
PreCalc  Sequence
A ball is dropped from a height of 20 ft and always rebounds 1/4 of the distance fallen. A. write a sequence for the first 3 rebound heights B. How high is the 6th rebound? C. Find the sum of all possible rebounds. I keep getting numbers that are too high.
asked by Joe 
Math/116
I need some help with my math lab week 7
asked by Dodie 
English
I have made the changes. Is this better? Thesis The sloppily dressed, wealthy businessman, who now has the stateoftheart mansion, but because of his penny pinching ways, no one would ever know it. Paragraph #2 Granted Oliver Toliver wasn’t a very
asked by lizzie 
Math
How much of 20% alcohol solution and 50% alcohol solution must be mixted to get 9 liters of 30% alcohol solution?
asked by BoB 
Math
A certain mass is supported by a spring so that it is at rest 0.5 m above a table top. The lowest position of the mass is 0.1 m, and the highest position is 0.9 m. The mass is pulled down 0.4 m at time =0, creating a periodic up and down motion. It takes
asked by hhfo 
SCIENCE
a traffic light is supported by a cable that makes ang angle of 7 degree w/ the horizontal on each side of weight. what is the maximum safe weight of the light if the maximum safe tension in the cable 1200N
asked by fei 
Chem 101
How many calories are required to raise the temperature of 24.4 g of water by 27.8°C
asked by lucy 
chemistry
If 50.0 grams of copper metal is added to a silver nitrate solution, what mass of silver is produced if copper 2 nitrate is also formed?
asked by yadira 
Math
Describe in your own words how to solve a linear equation or inequality
asked by Raul 
economics
A village has n fishermen who exploit the sea nearby and sell their catch at market price (assumed constant). The extraction technology displays decreasing returns to scale and is a=e^1/2 where e is the total effort. 1) What is the optimal behavior for
asked by jalal 
Economics
Unable to find any info to answer my question I recently posted about.. role of economic theory in the way economics are run today & no clue found as to concrete examples of same...went through all your sites you suggested and looked many, many sites
asked by Joanne 
Math
Use the information provided to write the vertex form equation of each parabola. a)y + 60x + 294 = 3x^2 b)−(y+1) = (x−4)^2
asked by Kate 
MathPlease help :(
Consider the Venn diagram below. The numbers in the regions of the circle indicate the number of items that belong to that region. (2 intersecting circles A & B, where A part is 50, B part is 110, and the intersecting part is 40) Determine: n(A) n(B) P(A)
asked by Jen 
Math
The length of a rectangle is 6 inches less than 3 times its width. Find the dimensions of the rectangle if its area is 45 square inches.
asked by Katie 
economics
What are some ways that the lack of development in the world affects us?
asked by Emily 
physics
What is meant by the term uniform electric field?
asked by Andy 
Statistics
The mean and median of 100 items are 50 and 52 respectively. The value of the largest item is 100. It was later found that it is 110, not 100. The true mean and median are a) 50.1, 52 b) 50, 52 c) 50.2, 52 d) None of these
asked by Sharon 
Math modeling
Write the formula for an exponential function with initial value 24 and growth factor 1.4
asked by Shondrae 
Physics
Hi, I need to know how much ground water presuure would be required to lift a 1.200m diameter plastic tank weighing 650kg out of the ground please, Please supply the answer in Kpa or psi Cheers
asked by Spencer 
maths
The perimeter of a farm in a shape of a square is 3,5km what is the length of 1 side the farm ?show all calculations
asked by Cindy 
math
How do you find the nth term in a sequence of numbers if the values are increasing then decreasing? Ex. 1: 2, 3: 10, 5: 18
asked by Shay 
finance
rRF = 5.0%; MRP = 5.0%; and b = 1.1. Based on the CAPM approach, what is the cost of equity from retained earnings?
asked by Anonymous 
math
M4 Rules of Differentiation Exercise Set 3.1 (4, 10, 26, 60) Exercise Set 3.2 (18, 36, 42, 48, 66) Exercise Set 3.3 (12, 26, 38, 50) Exercise Set 3.4 (6, 10, 22, 52, 82) Exercise Set 3.5 (8, 28, 54)
asked by kofi 
HUMA 215
Sayre posits that the vocabulary associated with romantic love, as it is known today, came into being during the Medieval Period. The troubadour or trobairitz, accompanied by lyre or lute, would recite poems about the feelings associated with this type of
asked by Meeeee 
geometry
Write a two column proof. Given CE = CA, EB and AD are medians, Prove: EB = AD for a triangle
asked by tiffany 
Maths
find the profit if a student sell 30 shirts and 50 caps
asked by Raka 
Math
I need to figure out if 57 people took a survey and 3 of them scored a (3), 31 of them scored a (4) and 23 of them scored a (5), what was the average score and how did you figure that out?
asked by KIm 
Earth Science
In what ways can sea level be lowered? What effect might this have on existing life forms? I can't find it in my textbook. Can somebody helps??????? THANKS A LOT!!!!!
asked by Cynthia 
statistics
suppose we selected a random sample of five woman from our school measure the height of each and calculated the sample mean if we wished to know whether the height of woman at our school is typical of height of women inourtown how should we compare our
asked by rhonda 
algebra
The halflife of 234U, uranium234, is 2.52 multiplied by 105 yr. If 98.8% of the uranium in the original sample is present, what length of time (to the nearest thousand years) has elapsed?
asked by Anonymous 
Business
What types of technology do people utilize to communicate? How does technology change the way people communicate? What does technology bring to communication other than the technology itself?
asked by Robert 
engllish
Even after achieving such wealth, Oliver has always remained true to himself and never allowed his beliefs to waver. Correct?
asked by lizzie 
Algebra
if p28=10/3(h5) how in the world do I figure out how many pounds of oranges a 18ft & 20 ft tree would make. I can get this far and just can catch onto the rest. Please help!
asked by Tammy 
Chemistry
For each compound, draw a line structural diagram of all isomers. Identify the kind(s) of isomers illustrated. A. CH3CH=CHCH3 B. C3H7OH C. CHIFCl
asked by Neha 
Statistics
Assume that a population is normally distributed with a mean of 100 and a standard deviation of 15. Would it be unusual for the mean of a sample of 3 to be 115 or more? Why or why not?
asked by Tamara Wright 
MATH
Consider the Venn diagram below. The numbers in the regions of the circle indicate the number of items that belong to that region. (2 intersecting circles A & B, where A part is 50, B part is 110, and the intersecting part is 40) Determine: n(A) n(B) P(A)
asked by Jen 
math
help solve x + 1/6= 1/3 thanks
asked by joe 
Psychology
The testing company has hired qualified peopl in the field to administer thenew test bank to subjects of different ages and ethnic backgrounds. They need a sizable number of scores from inner city, urban and country/small town subjects. Their goal is to
asked by Nicci 
maths
The perimeter of a farm in a shape nf a square what is the length of 1 side the farm ?show all calculations
asked by Cindy 
math
find the lateral surface of the frustum of a cone 6inches high with upper and lower bases 11inches and 7inches in diameter respectively
asked by res 
science
why potassium stock with 10000mg/L is added to the sodium standard solution with 20mg/L during the preparation for aas?
asked by saymyname 
physics
in what specific way does light from distant stars and galaxies tell astronomers that atoms throughout the universe have the same properties as those on earth?
asked by Anonymous 
Maths literacy,business,acounting,economics
A clear explanation of the consequences of this human factor
asked by Melusi 
law
Choose a current federal, state, or local issue that directly affects public policy pertaining to the criminal justice system. Prepare a 700 to 1,050word paper in which you analyze the issue and related policy. Be sure to address to following points in
asked by kofi 
english
Please explain the line, "Be prompt without being stubborn,refuse without arguments,clothe weighty matters in a motley garb."
asked by Richie 
Math
Mary purchased a package of 13 different plants, but she only needed 9 plants for planting. In how many ways can she select the 9 plants from the package to be planted?
asked by Jen 
Psychology
If the concept is a truck, the prototype may be: a) a Ford pickup b) bulldozer c) an eighteenwheeler d) personnel carrier I think c
asked by Nicci 
Psychology
If the prototype is block or ball, the concept is: a) construction b) toy c) child d) play I think b
asked by Nicci 
algebra
The halflife of 234U, uranium234, is 2.52 multiplied by 105 yr. If 98.8% of the uranium in the original sample is present, what length of time (to the nearest thousand years) has elapsed?
asked by Anonymous 
Spanish
Help please, are all my answers correct? Distingue entre todos los usos con se en las oraciones a continuación. 1) Allí es donde _______ coches/carros/autos de Europa. Vamos mañana para buscar uno para comprar. A) fueron vendidos B) se venden C) se me
asked by Polly 
differential calculus
Find how fast (a) the circumference (b)the area, if a cicle increases when the radius increases.
asked by wen 
STATISTICS (2 Questions)
Show all work. Any answer given with just an answer will be counted wrong. Also, Show the graph and shaded region as needed or it will be counted wrong. Make sure to answer the question using the steps of hypothesis testing. a.) state the hypothesis, b.)
asked by Courtland White 
algebra
The halflife of 234U, uranium234, is 2.52 multiplied by 105 yr. If 98.6% of the uranium in the original sample is present, what length of time (to the nearest thousand years) has elapsed?
asked by Anonymous 
Physics
On a warm day (92°F), an air filled
asked by Anonymous 
economics
Should development around the world be a higher priority to the rich countries?
asked by Emily 
Physics
On a warm day (92°F), an air filled
asked by Anonymous 
Math
Consider the Venn diagram below. The numbers in the regions of the circle indicate the number of items that belong to that region. (2 intersecting circles A & B, where A part is 50, B part is 110, and the intersecting part is 40) Determine: n(A) n(B) P(A)
asked by Jen 
Globalization
What are the main questions that the Commanding Heights series is posing about globalization and economics and how does it fit into the concept of development?
asked by Brandon 
Psychology
"How are a cat and a dog alike?" An answer to this question requires: a)crystallized intelligence b)intrapersonal intelligence c)fluid intelligence d)Eastern intelligence I think c
asked by Nicci 
Psychology
"Who was the first vice president of the United States". the correct answer to this question requires: a) Crystallized intelligence b) intrapersonal intelligence c) fluid intelligence d) Eastern intelligence I think a
asked by Nicci 
Psychology
The experimental rats were being raised in separate environments. One group lived in a traditional cage in a quiet, welllit room. They were supplied with plenty of food and water. The second group inhabited "Rat Disney Land". There were colorful toys,
asked by Nicci 
Math
Express fraction as a percent
asked by Jeanette 
Chemistry
How do i calculate plate number, distribution constant, mobile phase and stationary phase volume for tlc not HPLC/ GC
asked by Pharmacy 
colleege homework help
In F. Scott Fitzgerald's story "Bernice Bobs Her Hair," we are very likely to
asked by Anonymous 
Psychology
The entire class was in an uproar. The teaching assistant had proctored the exam while the professor was attending a conference, and the test seemed unrelated to the chapters that they had studied. The students' complaints are based on the test's lack of:
asked by Nicci 
English
I changed it from moreover to and. Correct? They told him that he was never going to be anyone important because of a name like his, and because of the way he looked and dressed.
asked by lizzie 
SpanishCHECK PLEASE (POR FAVOR)!
Help please, are all my answers correct? Distingue entre todos los usos con se en las oraciones a continuación. 1) Allí es donde _______ coches/carros/autos de Europa. Vamos mañana para buscar uno para comprar. A) fueron vendidos B) se venden C) se me
asked by Polly 
Chemistry
Serine exists in its zwitterion form at a pH of 5.7. Draw the structural formula for the same. Explain the manner in which the structural formula of polar and nonpolar amino acids would vary
asked by mema 
ORGANIC CHEMISTRY 2
Ethanol has boiling of 78.5 while dimethyl ether has boiling point of 24.9;so account for this diffrence in boiling points since they both have the same molecular weight.how can this be explained using diagrams?
asked by ASTHON LEBUHANG 
CONTACTS,CONFLICTS,AND THE CRUCIBLE
As a result of his stay in Cairo, Mansa Musa caused
asked by titus 
Is this correct?
is this correct? Completely factor the following expression: 64y^249z^2 Is the answer: 128 y49
asked by Ashley 
Can someone help me with this one Please! :)
factor out the greatest common factor 36m^2n^360mn^4+18m^4n^2
asked by Ashley 
MATH!
is this correct? Completely factor the following expression: 64y^249z^2 Is the answer: 128 y49
asked by Ashley 
math
factor out the greatest common factor 36m^2n^360mn^4+18m^4n^2
asked by Ashley 
Statistics
Mean of n numbers X1, X2,Xn is m. If Xn is replaced by x the new mean is
asked by Sharon 
science
how long does it take to dissolve 3 ice cubes in a glass of water
asked by will 
Physics
A train compartment of size 4m and 3m is moving on a horizontal track. A man fires a shot from outside with a velocity 10 m/s at an angle 53' with the track. A person sitting inside the compartment observe the bullet one corner to diagonally uposite coner.
asked by Sonu 
algebra
Describe what the graph of interval[4,10] looks like. Please answer
asked by babs 
statistics
Suppose the following summary statistics are obtained from a large group of individuals:X =52.0, Sx= 8.7, Y =147.3, Sy = 16.9. Dorothy receives an Xscore of 52. What is her predicted Y score if r = o?
asked by Tina 
science
how does social and cultural influences influence science education
asked by Melissa 
math
help needed
asked by sober 
education
Create an outline of your Educational Debate Persuasive Paper. The outline should be based on one of the educational debates found in Appendix A and should highlight the main points of your paper. Include an annotated bibliography of at least three sources
asked by Anonymous 
Math
Evaluate 5^C3
asked by Jen 
physics
A man starts running a race with velocity v. in the begining of race he finds wind is blowing at an angle alpha with the track. As he progress straight horizontal road wind appears to rotate uniformly and by the gime he completes the race wind appears to
asked by Sonu 
Economics
What is the role of economic theory in the way economies are run today? Give some concrete examples.
asked by Joanne 
math 104
log_(9) \(73\)
asked by Anonymous 
math
what is the sum of 5/16 and 7/8
asked by Anonymous