Questions Asked on
May 3, 2015

Chemistry(difficult)
A moon rock collected by a U.S. Apollo mission is estimated to be 3.70 billion years old by uranium/lead dating. Assuming that the rock did not contain any lead when it was formed, what is the current mass of 206Pb per 1.185 g of 238U in the rock? The
asked by josh 
math
A wall in Marcus's bedroom is 8 2/5 feet high and 18 1/3 feet long. If he paints 1/2 of the wall blue
asked by M 
Math
What is the next number in this series? 2 1 .5 .25 .125
asked by Suzanne 
Math
Thomas and Jonelle are playing darts in their garage using the board with the point values for each region shown below. The radius of the outside circle is 10 inches, and each of the other circles has a radius 2 inches smaller than the next larger circle.
asked by Anonymous 
Physics Help Please
A 35mm camera equipped with a 40mm focal length lens is used to photograph a tree 17 m tall. If a 32mm high image of the tree on the CCD sensor is required, how far should the camera lens be from the tree? Show Work Please! Thank you so much!
asked by Need Help Urgent 
Math
On September 1, a dress was priced at $90. On October 1, the price was reduced by 20%. On November 1, the price was further reduced by 25% of the October 1 price and marked FINAL. What percent of the original price was the FINAL price? F. 40% G. 45% H. 55%
asked by Anonymous 
Math
A train travels 70 feet in 1/10 second. At this same speed, how many feet will it travel in 3 1/2 seconds?
asked by Suzanne 
chemistry
Battery acid is 4.27MH2SO4(AQ.) And density of 1.25g/ml . What is the molality of H2SO4 in the solution
asked by anjali 
math
When wire is selling at $.0125 a foot, how many feet can you buy for $1.00?
asked by Suzanne 
chemistry
The halflife of C14 radioactive is 5760 yr. After how much time will 200 mg C14 sample be reduced to 25 mg?
asked by yashpal 
math
the path of a cliff diver as he dives into a lake is given by the equation y=(x10)power of 2 + 75...where y meters is the divers height above the water and x metres is the horizontal distance travelled by the diver. what is the maximum height the diver
asked by sharon 
trigonometry
Solve sin(x)=−0.89 on 0≤x
asked by Dan 
economics
3. The following facts characterize the furniture industry in the United States:39 a. The industry has been very fragmented, so that few companies have the financial backing to make heavy investments in new technology and equipment. b. In 1998, only three
asked by mike 
Algebra
Robert needs to cut for shelves from a board that is 2.5 m long. the second shelf is 18 cm longer than twice the length of the first shelf. the third shelf is 12 cm shorter than the first shelf. the remaining shelf is 4 cm longer than the first shelf. if
asked by Anonymous 
accounting
As of January 1 of the current year, the Grackle Company had accounts receivables of $50,000. The sales for January, February, and March of 2012 were as follows: $120,000, $140,000 and $150,000. 20% of each month’s sales are for cash. Of the remaining
asked by shane 
psychology
Suppose that the scores of architects on a particular creativity test are normally distributed. Using a normal curve table, what percentage of architects have Zscores: Above .10 = Below .10 = Above .20 = Below .20 = Above 1.10 = Below 1.10 = Above .10 =
asked by eddie wade 
Math
The measure of each interior angle of a regular polygon with n sides is [(n  2)180 / n] degrees. What is the measure of each interior angle of a regular polygon with n sides, in radians? A. (n  2)pi / 4n B. (n  2)pi / 2n C. (n  2)pi / n D. (n  2)2pi /
asked by Anonymous 
Science
An existing cord that you use for a lamp is much thinner than an extension cord recommended for use with large appliances. if u plugged in a refrigerator using a lamp extension cord, the plastic coating of the cord could melt and perhaps start a fire. why
asked by Albert Einstein 
science
A 80 kg firefighter climbs flight of stairs 6 meter high in 10 seconds. How much work is required by the firefighter?
asked by andro 
physics
Francesca, who likes physics experiments, dangles her watch from a thin piece of string while the jetliner she is in takes off from JFK Airport. She notices that the string makes an angle of 25° with respect to the vertical as the aircraft accelerates for
asked by Scar 
Math Trigonometric Identities
1/sinx  sinx = cosx/tanx
asked by Anonymous 
chemistry
What volume of 3.00M HCl in liters is needed to react completely (with nothing left over) with 0.750L of 0.400M Na2CO3?
asked by Anonymous 
Criminal Justice
According to the U.S. Department of Justice, the majority of defendants facing the death penalty are: A. white males. B. minority males. C. white females. D. minority females. is it A
asked by Amy 
Math please help.
Find the function that has the greater rate of change As x increases by 1, y increases by 3. The graph x: 1  0  1 y: 0  2  4 A. the slopes are equal B. the graph has a greater slope C. the function rule has a greater slope**** D. none of the above
asked by Anne 
MathONE QUESTION
Use arrow notation to describe the translation of point P(9 , 8) to point (14, 0). (x,y) > (x + 5,y 8) (x,y)  > ( x  8, y + 5) (x,y) > (x  5, y + 8) (x,y) > (x  5, y  8 )
asked by Anonymous 
calc (please help)
A wedge is cut from a right circular cylinder of radius r by two planes, one perpendicular to the axis of the cylinder and the other making an angle (beta) with the first. Find the volume of the wedge by slicing perpendicular to the yaxis. Please show all
asked by beam 
Chemistry
would you classify 2C(s) + H2(g) > C2H2(g) +227.4 as endothermic or exothermic? Why?
asked by No Name 
Global finance
What moves an exhange cross rate in forex?
asked by V 
trigonometry
1) Find the exact value of the expression: tan−1(tan(−120651/47π))... How do you find Tan(120651/47pi)? I don't know how to find exact values, if it's not a recognizable value. 2)Find a simplified expression for tan(sin−1(a/5))... Because tan = y/x
asked by Dan 
Chemistry
Underground miners formerly used headlamps in which calcium carbide (CaC2) was reacted with water to form acetylene (C2H2) gas as shown in the following reaction: CaC2(s) + H2O (l) > C2H2 (g) +Ca(OH2)(s) The acetylene produced was then burned to produce
asked by Miranda 
Law and Ethics Medical
. Physicians in general practice are expected to conform to the standards A. of other general practitioners in the same or similar communities. B. of specialists. C. that each individual doctor is capable of meeting, given each doctor's documented personal
asked by debbie 
Math
What would the grapg of 10/x look like? A. a straight line B. a parabola C. a curve*** D. none of the above What would the graph of y=3/4x  7/8 look like? A. a straight line*** B. a parabola C. a curve D. none of the above y=x2 + 1 look like? A. straight
asked by Anonymous 
chemistry
The molar heat of fusion of benzene is 9930 J/mol and ∆s= 35.7 j/moldeg. Calculate the melting point.
asked by Gabby 
Math
The ratio of a to b is 3 to 4, and the ratio of c to b is 1 to 2. What is the ration of a to c? F. 1 to 1 G. 3 to 1 H. 3 to 2 J. 3 to 8 K. 6 to 1
asked by Anonymous 
class
Suppose that the scores of architects on a particular creativity test are normally distributed. Using a normal curve table, what percentage of architects have Zscores: Above .10? Below .10? Above .20? Below .20? Above 1.10? Below 1.10? Above .10? Below
asked by eddie wade 
Calculus
A wedge is cut from a right circular cylinder of radius r by two planes, one perpendicular to the axis of the cylinder and the other making an angle (beta) with the first. Find the volume of the wedge by slicing perpendicular to the yaxis. Please show all
asked by Beam 
Chemistry
A scuba tank contains heliox, a special breathing gas composed of 5.0% oxygen and the remainder helium, for use by divers that spend extended amounts of time at depth underwater. The volume of the tank is 20 L and the pressure within it is 1500 lb/in2.
asked by alexis 
Algebra
Nicole has a collection of 29 nickels and dimes worth $2.30. How many of each does she have?
asked by Something cool 
physics
Bill has a mass of 66.9 kg. Jane has a mass of 58.8 kg. If they are seated 2.2 m apart, how much gravitational force attracts them?
asked by liz 
Trigonometry
Find the exact value of the expression: tan−1(tan(−120651/47π)) I just don't know how to find the exact value. Any explanation would be awesome!
asked by Dan 
science
The mass of a beaker containing a sample of sodium dichromate was determined to be 68.9 g. After transferring a sample it weighed 56.424 g.Determine the mass (g) of sodium dichromate transferred to the correct number of decimal places
asked by Diana 
Chemisty
The aqueous solution of two soluble salts are mixed to precipitate an insoluble salt. Give four different equations to support this statement.
asked by Saurav ; please help 
Math trigonometric Identities
Is this correct? (sinx  cosx)^2 = 1  2sinxcosx LS = sin^2x  2sinxcosx + cos^2x = 1  cos^2x  2sinxcosx + cos^2x = 1  cos^2x + cos^2x  2sinxcosx = 1  2sinxcosx LS = RS
asked by Anonymous 
trigonometry
show that : sin(A+B).sin(AB)=Cos^2B  Cos^2A =sin^2A  sin^2B
asked by saurav 
science
750N diver does a triple somersault off a 10m platform. If it takes 1.5sec. to hit the water. What is the diver's power?
asked by sandra 
Math
If tan A = a / b, a (is greater than sign) 0, b (is greater than sign) 0, and 0 is (less than sign) A (is less than sign) pi / 2, then what is cos A? a. a / b B. b / a C. a / radical(a^2 + b^2) D. b / radical(a^2 + b^2) E. radical(a^2 + b^2) / b
asked by Anonymous 
Lukhanyo
English is the language of opportunity. Why bother to teach indigenous languages
asked by Basetsana 
Math
You draw five cards from a standard deck of 52 cards. P(heart) = 4/5 (fraction). What type of probability is illustrated and why? Theoretical; the result is based on the number of possible outcomes** Theoretical; the result is found by repeating an
asked by Sarah 
Physics
Prove that if an object is at a distance of twice the focal length from a lens the image is the same size as the object. Show this using an algabraic method.
asked by Anonymous 
physics
a box is given a push so that it slides across the floor. how far will it go, given that the coefficient of kinetic friction is 0 .2 and the push imparts an initial speed of 4m/s?
asked by Scar 
Math
The solution set of radical(x  1) (is greater than sign) 5 is the set of all real numbers x such that: F. x (is greater than sign) 4 G. x (is greater than sign) 6 H. x (is greater than sign) 24 J. x (is greater than sign) 25 K. x (is greater than sign) 26
asked by Anonymous 
physics
a box is given a push so that it slides across the floor. how far will it go, given that the coefficient of kinetic friction is 0.2 and the push imparts an initial speed of 4m/s?
asked by Scar 
Earth Science
the magnification of a telescope is changed by changing what? my answer is the eyepiece
asked by Steve 
science
What is the major difference between how water and nutrients are carried in a plant and how water and nutrients are carried in the human body?
asked by Fayt 
science
The blocks shown are released from rest with the spring unstretched. The pulley and the horizontal surface are frictionless. If k = 427.1 N/m and M = 4.5 kg, what is the maximum extension of the spring?
asked by haddad 
Statistics
The estimate of the population proportion is to be within plus or minus 0.06%, with a 99% level of confidence. The best estimate of the population proportion is 0.22. How large a sample is required? Round answer to the next whole number.
asked by Tiffany 
chemistry
how many grams of potassium carbonate are in 75.0ml of a 2.44M solution?
asked by elmi 
Math
Integral of (1/root over 1x^2)*(1/inverse of sin x*dx) .what is the value?
asked by Srikar reddy 
Math HELPPP!
Andrew's dog Bubba has an exercise area behind the house. A stake in the ground has a 12 foot rope tied to it. The other end of the rope is fastened to Bubba's collar. If Bubba travels in a circular path around the stake. What is the largest Circumference
asked by Anonymous 
Math Trigonometric Identities
Is this correct? (sinx  cosx)^2 = 1  2sinxcosx LS = sin^2x  2sinxcosx + cos^2x = 1  cos^2x  2sinxcosx + cos^2x = 1  cos^2x + cos^2x  2sinxcosx = 1  2sinxcosx LS = RS
asked by Chewbacca 
math
what formular do you use to find the area of an angle PQR
asked by sheron 
Dance
Cute drill team squad names that start with H? I need help!
asked by Heather 
Calculus max/min
d=0.767. There are two parallel sidewalks that are separated by the park that is 600 feet wide. You are standing on the south sidewalk facing east. On the north sidewalk, 2000 feet ahead of you, is a bus stop. You can walk on the sidewalk at 5.5+d feet per
asked by John 
english
traditional african marrriage is an advatage for men only
asked by shanice 
math
stuck on this problem. i started with x2y+4z=23. here is the problem: Three men, each having denarii, found a purse containing 23 denarii. The first man said to the second, “If I take this purse, I will have twice as much as you.” The second said to
asked by Mirella 
physics
A cube has a density of 2200kg/m3 while at rest in the laboratory. What is the cube's density as measured by an experimenter in the laboratory as the cube moves through the laboratory at 81.0{\rm \\%} of the speed of light in a direction perpendicular to
asked by Anonymous 
Chemistry
How much heat is absorbed by a 2966 kg granite boulder as energy from the sun causes its temperature to change from 3°C to 31°C? 1000 g = 1 kg
asked by allie 
Math
Evaluate the following expressions tan(−22/15π)
asked by Anonymous 
English
Why is it that Ray Bradbury wrote Fahrenheit 451 during the 1950s?
asked by Anonymous 
Sociology
I need help choosing an object to describe me for a sociology project.
asked by Anonymous 
education
The children’s performance in relation your main objective listed on the activity plan what is this question asking. example please
asked by John 
Chemistry
If you have a sample of gas with a volume of 15mL and it changes to 25mL , what would be the new pressure if the original pressure was 5.0 atm ?
asked by No name 
Physics
Given an object distance of 48[mm] and a thinlens focal length of 110[mm], then what is the image distance? What is the scale factor (M) of the image seen in the previous question?
asked by Bri 
History
What is the definition of strategy?
asked by Hannah 
maths
solve the following systems of equation 5x+3y+z=34 x3y+2z=13 14x2y+3z=53
asked by Anonymous 
chemistry
A 0.239 mol sample of PCl5(g) is injected into an empty 2.85 L reaction vessel held at 250 °C. Calculate the concentrations of PCl5(g) and PCl3(g) at equilibrium.
asked by layla 
english/polsci essay excerpt edit
Can someone edit this? Also, does anyone edit whole papers? (Essay redacted per request from original poster.)
asked by christine 
trig
Find the values of sin 0, cos 0, and tan 0ƒáif the angle 0ƒáis in standard position and its terminal side passes through the point (¡V15, 8). Give answers as fractions.
asked by justin 
Chemistry (Molarity)
Indicate the concentration of each ion or molecule present: a mixture of 48.0 mL of 0.11 M KClO3 and 28.0 mL of 0.29 M Na2SO4. Assume the volumes are additive. a) [K+] b) [ClO3] c) [SO42] d) [Na+] We haven't taken notes on this particular type of problem
asked by Anne 
trigonometry
Solve cos(x)=0.07 on 0≤x
asked by Anonymous 
MathProbability
In 2008, 1.01% of returns were audited, 85.6% returns received a refund, 49,907 the number examined resulting in a refund, 1,342,674 number examined resulting in no refund. If a taxpayer receives a refund, what is the likelihood that the taxpayers return
asked by LBA1mt 
Physics
Consider two students, a 65 kg guy and a 50 kg girl who are attracted to each other, gravitationally, that is. They sit next to each other in Physics class which means there is 1.5m between their centers. What is the magnitude of the force of gravity
asked by Maria 
Maths
Four non coplanar points are given. How many boxes have these points as vertices?
asked by Ganga bhowmick 
Math 222
How do I graph these two problems? y = −x2 g(x)= sqrt x1
asked by TikaPLEASE HELP 
mth121
mth 121(solve the linear equation:2x+3y=3, x2y=5 and 3x+2y=7.)
asked by Anonymous 
French
Can someone check my present tense story for me in French? as well as the past? (This is another simpler summarization cuz my other one was so complicated) but thx to whoever helped. 1.) Il y a un homme qui s'appelle Alexandre Lagarde. 2.) Il a un
asked by Meghan 
Math
(sinx  cosx)(sinx + cosx) = 2sin^2x 1 I need some tips on trigonometric identities. Why shouldn't I just turn (sinx + cosx) into 1 and would it still have the same identity?
asked by Anonymous 
Criminal Justice
Which of the following would a rational choice theorist most likely consider to be a factor in crime causation? A. Poverty B. A poor home environment C. Inadequate socialization D. Individual choice is it D
asked by Amy 
Law and Ethics Medical
2. Elizabeth says duty of care is the obligation health care workers have toward patients. Randy says professional etiquette is the obligation health care workers have toward patients. Who is correct? A. Only Randy is correct. B. Neither is correct C. Only
asked by debbie 
Law and Ethics Medical
The verification requirement of HIPAA requires that PHI information not be disclosed without verifying A. the accuracy of medical information before it's released. B. the identity of the person making the request. C. that the information can't be obtained
asked by debbie 
Law and Ethics Medical
The verification requirement of HIPAA requires that PHI information not be disclosed without verifying A. the accuracy of medical information before it's released. B. the identity of the person making the request. C. that the information can't be obtained
asked by debbie 
setswana
kwelola mafoko a latelang mme o a buisitse kwa sekao: mala,sala,bala,sila,bin,lala,mens,bua,rua,kua,tima,kima,sia godimo dira ja o ga fitlha a buisa sentle
asked by Oratilwe 
physics
vibrating a long spring with a succession of pulses with a frequency of 50Hz produces adjacent nodes that are separated by 3.5cm. what is the velocity of the longitudinal waves formed?
asked by Anonymous 
Criminal Justice
People appear to be particularly fascinated by what type of crime? A. Violent B. Property C. Victimless D. Common law Is it A
asked by Amy 
Law and Ethics Medical
Which of the following is true regarding birth certificates for nonhospital births? A. Birth certificates for nonhospital births are filed by the mother. B. Birth certificates for nonhospital births are optional but recommended. C. Birth certificates for
asked by debbie 
economics
Are there any current subsidy or welfare issues that are being addressed in parliament or in municipalities
asked by zinhle 
English
Traditional african marriage is an advantage for men only not women
asked by Scelo 
English
Why marriege is an advantage for men not only for woman?
asked by Yamkela 
math
which function has the greater rate of change? xaxix: 1  0  1  2  yaxis: 0  1  2  3  the graph has a line and 3 dots on the line. the first dot is 0, 1 the second dot is 0, 1 the third dot is 1, 2 A. the rates of change are equal B. the graph
asked by Anonymous 
chemistry
As a research chimst, you are intrested in studying the extent and type of interactions in aqueous salt solution. As part of this study, you weight three samples of NaCl and dissolve each in 1.000kg H2O. You then measure the freezing temp. of each solution
asked by Frank 
Statistic
Researchers collected samples of water from streams in a mountain range to investigate the effects of acid rain. They measured the pH (acidity) of the water (a lower pH means the water is more acidic). They then classified the steams with respect to the
asked by Johny 
maths
simplify 8C5 The "C" stands for combinations ( like combinations and permutations )
asked by Sarah 
Math. first and last repost. please help
Find the function that has the greater rate of change As x increases by 1, y increases by 3. The graph has a line and 3 dots. the dots are labeled x: 1  0  1 y: 0  2  4 A. the slopes are equal B. the graph has a greater slope C. the function rule has
asked by Anne 
Law and Ethics Medical
Which of the following has the most potential to treat the widest variety of diseases? A. Adult bone marrow B. Stem cells in umbilical cord blood C. Amniotic stem cells D. Embryonic stem cells I have NO CLUE on what is the right choice
asked by debbie 
math
In printing an article of 21,000 words, a printer decides to use two sizes of type. Using the larger type, a printed page contains 1,200 works. Using the smaller type type, a page contains 1,500 words. The article is allotted 16 full pages in a magazine.
asked by Suzanne 
PHYSICS
When some stars use up their fuel, they undergo a catastrophic explosion called a supernova. This explosion blows much or all of a star's mass outward, in the form of a rapidly expanding spherical shell. As a simple model of the supernova process, assume
asked by Anonymous 
Law and Ethics Medical
Which of the following is true? A. All states require parental involvement for a minor to obtain birth control. B. No state requires parental involvement for a minor to obtain birth control. C. Some states require doctors to inform parents that a minor has
asked by debbie 
Math
Three individuals form a partnership and agree to divide the profits equally. X invests $4,500, Y invests $4,500, and Z invests $1,000. If the profits are $1,500, how much less does X receive than if the profits were divided in proportion to the amount
asked by Suzanne 
Science
Give an example of something that uses all third of Newton's Law.
asked by Anonymus 
Calc 1
A rectangular garden is to be enclosed by a fence and divided into 5 regions as shown below. Find the values of L and W for which the total area is as large as possible assuming that only 120 ft. of fencing is available.
asked by TayB 
Math
For $4.50 a grocer buys a case of fruit which contains 14 dozen. She knows that four dozen will spoil before sells them. At what price per dozen must she sell the good ones to gain 1/3 of the whole cost.
asked by Suzanne 
Calc 1
A rectangular storage container with an open top is to have a volume of 10 m3. The length of the base is twice the width. Material for the base is thicker and costs $13 per square meter and the material for the sides costs $10 per square meter. Find the
asked by TayB 
Math
Pearland Medical Center owns a small satellite clinic, specializing in General Practice, located at nearby Pearland airport. General Practice Clinic’s sole payor is Air Health, a health care plan that covers the airport employee population. Air Health
asked by Carol 
Calculus 2
Find the radius of convergence and interval of convergence of the series. There is an infinity sign on top of the summation symbol and "n=1" underneath it. To the right of the summation symbol is x^n/5n! How would you find the radius of convergence and
asked by Sena 
ChemistryAcids
Write a balanced chemical equation to show the reaction that occurs when each weak acid reacts with water. (Omit statesofmatter from your answer. Use the lowest possible whole number coefficients.) (b) HCHO2 I've gotten a and c correct, and from that I
asked by Bridget 
Electrical trade theory N2
What are the functions of the brushes in a dc motor?
asked by Nthabiseng 
Science
How does the sun's gravitational attraction to the earth compare to that of the moon?
asked by Robert 
Science
On what sides does a "bulge" in the earth's oceans appear on the earth?
asked by Kim 
chemistrylast time i promise
CO(g) + H2O(g)>CO2 + H2 (g) reaction occurs in a 2.0 Ll reactor at 800 degrees celsius. The reaction conditions are such that a complete conversion of reactants into products results. The reactor is charged initially with 5.0 atm of CO and 8.0 atm of
asked by alexis 
Math 222
Why is it so difficult to get help when someone has posted a question 8 hours ago???
asked by Tika 
Law and Ethics Medical
. Which of the following has the most potential to treat the widest variety of diseases? A. Adult bone marrow B. Stem cells in umbilical cord blood C. Amniotic stem cells D. Embryonic stem cells A?
asked by debbie 
Science
There are 2 high and 2 low tides each day. Why do this many tides occur each day?
asked by Mark 
Math
Is 8x^2 + x^2  7x  x + 2x + 5y  3y equal to 9x^2  8x + 2y or 9x^2  6x + 2y?
asked by Anonymous 
Education
What view do you have of the children's skills and competencies? In what ways do you need to transform your view of children to see them in a more positive light? what is this question asking for? example please.
asked by John