Questions Asked on
April 7, 2008

trig
I have heard that trig CAN be super easy, that there are just, like, 10 rules you need to memorize then all the problems are easy. ... Does anyone know what these are? Thanks!
asked by jennifer 
physics
1)As a sound source moves away from a stationary observer, the number of waves will. A)increase B)decrease C)remain the same D)need to know the speed of the source (answer:decrease.) As the detector recedes from the source, the relative velocity is
asked by Jon 
math
Find the unit price (cost for 1 ounce), to determine which is the best buy on pasta sauce? (1 qt = 32 oz). a) 1 qt for $1.29 b) 45 oz for $1.59 c) 48 oz for $1.79
asked by Lisaraye 
Businees(finance)
Nancy Tai has recently opened a revolving charge account with MasterCard. Her credit limit is $1000, but she has not charged that much since opening the account. Nancy hasn't had the time to review her monthly statements as promptly as she should, but over
asked by Dena 
Dynamics
A series of small packages are being moved by a thin conveyor belt that passes over a 300mm radius idler pulley. The belt starts from rest at time t=0 and its speed increases at a constant rate of 150mm/s^2. Knowing that the coefficient of static friction
asked by Hal 
Chemistry
Is the solvation of borax in water an exothermic or endothermic process? i am thinking the it is endothermic...is that right?
asked by Riley 
Literature
What are some symbols in oedipus the king i have swollen foot, tierias, crossroads, and the shephard
asked by Dr. Rose 
chemistry
Solid borax dissolves in water according to the equation: Na2B4O7 10H2O(s) 2Na+ (aq) + B4O5(OH)42–(aq) + 8H2O(l) The sign of Ssys will be A. positive B. negative because there are A. more B. less moles of products generated. i've tried solving this
asked by david 
algebra 1
I am working on cross products of proportions. one question is 5/7 = 3w/21 Can someone help?
asked by BBnewgo 
books
I have read many, many books and was wondering does anybody have a suggestion of a book I may be interested in? I am an 8th grader with a college level lexile and prefer fictionish books.
asked by BBnewgo 
Science  Chemistry
Having some trouble elaborating on a answer/conclusion for my investigation report. Why is it, that if we add more 2M HCl to 1gram of carbonate(crushed shells), the reaction takes longer to stop? Below is the results table. Time results are written in
asked by SilverTrend 
Physics
A person must move two heavy packages over a surface level so they place a 20kg package over a 30kg package and decide to move them together. The coefficient of kinetic friction between the lower package and the ground is 0.3. The person exerts a force of
asked by Alex 
maps
what is a ordnance suevey map??
asked by Elizabeth 
math
the problem is 2cos^2x + sinx1=0 the directions are to "use an identity to solve each equation on the interval [0,2pi). This is what i've done so far: 2cos^2x+sinx1=0 2cos^2x1+sinx=0 cos2x + sinx =0 1  2sin^2x + sinx = 0 2sin^2x+sinx1=0
asked by alex 
math
Simplify: x3 divided by 3 minus x2 divided by 2
asked by Mary 
Math
Factorise: a)x squared  5x b)x squared  81
asked by Jonathan 
Critical Thinking
Hello, Im new here and im having problems with my homework. I need to do these two things for different sources and i find it next to IMPOSSIBLE to find these... Identify and name any rhetorical devices used by the author. If none exist, explain how you
asked by Bob 
math
Two cassettes and three cd's cost $175 while four cassettes and one cd cost $125. 1)Given that one cassette cost $x and one cd cost $y,write two equations in x and y to represent this information. 2)Calculate the cost of one cassette.
asked by rufus 
math
given that R= 2p(squared) divided by Q3 1)Calculate the value of R when P=6 and Q=12. 2)rearrange the formula to make Q the subject.
asked by scott 
Science repost for Krishna
http://www.jiskha.com/display.cgi?id=1207535544
asked by Writeacher 
Economics
A tax imposed on a maket with an inelastic demand and an elastic supply will cause: a)sellers to pay the majority of the tax b)buyers to pay the majority of the tax c)the tax burden to be w
asked by G 
math
Factorise completely: 1)3g3t+2mg2mt 2)3x squared + 2x8 3)3x squared27
asked by mark 
Economics
A tax imposed on a market with an inelastic demand and an elastic supply with cause: A)sellers to pay the majority of the tax B)buyers to pay the majority of the tax C)the tax burden to be equally devided between buyers and sellers D)the tax burden to be
asked by G 
Science repost for Heather
http://www.jiskha.com/display.cgi?id=1207538741.1207539139
asked by Writeacher 
english
"Life begets life. Energy creates energy. It is by spending oneself that one becomes rich.” what does this quote mean??
asked by martin 
math
Given that y varies inversely as x, use the values of x and y from the following to calculate the value of a. x 2 32 y 8 A
asked by joe 
math
the functions f and g are such that f(x)= 2x+5/x4 and G(x)=2x3 calculate the value of a)g(4) b)fg(2) c)g`1 (7)
asked by cassie 
math
write as a single fraction the simplest form: 3/x + 4/x+1
asked by sandra 
algebra
help with find the domain of the function f(x)=log(5x+1)
asked by luly 
math
Solve the pair of simultaneous equations x^2=4y x=y+2
asked by candy 
math
wtite 3x^2 +8x25 in the fomr a(x+h)^2+k, where a,h and k are real numbers
asked by thomas 
math
Guy $1.00=US $0.01 and EC $1.00 =US $0.37 Calculate the value of: 1)Guy $60,000 n US $ 2)US $925 in EC $
asked by rhonda 
accounting
differentiate between various costing systems
asked by Anonymous 
englishal gore
need answer to these questions: 2. Why is the picture of Earth taken on Dec. 11, 1972 the most commonly published photograph in history? 4. Why did they choose the middle of the Pacific Ocean for these measurements? 5. What year did Al Gore go to Kyoto,
asked by bill 
physics
How fast should a car move toward you for the car's horn to sound 2.88% higher in frequency than when the car is stationary? The speed of sound is 343 m/s. A)42.5 Hz B)54.5 Hz C)61.8 Hz D)65.4 Hz v=16 fs=583 vs=343 (16+0)/16 Im not even gonna post the rest
asked by Jon 
physics
A boy is blowing a whistle of frequency 536 Hz and walking toward a wall with a speed of 1.64 m/s. What frequency of the reflected sound will the boy hear if the speed of sound is 343 m/s?
asked by Jon 
com 215
how will you apply the knowledge you have learned about effective business communication and cultural diversity to your current job and college courses
asked by sugrbare24 
Chemistry
Calculate the maximum concentrations of Pb+ that can exist in 3.0 x 10(2)M Na2SO4 without forming a precipitate.
asked by Natasha 
chemistry
When 18 g of ethylene glycol C2H6O2 is dissolved in 150 g of pure water, the freezing point of the solution is _C . (The freezing point depression constant for water is 1.86C kg) what i tried was 18/62 to find the moles. then i got .29/.150 to solve for
asked by david 
physics
a sound wave of frequency 500 hz travels from air into water. the speed of sound in air is 330 m s1 and in water 1490 m s1. what is the wavelength of the wave in a)air; b)water
asked by sake 
chemistry
why do some M&M dye's travel farther than others when placed in water?
asked by Jordan 
physics
a ship sends a snoar pulse of frequency 30kHz and duration 1.0 ms towards a submarine and receives a reflection of the pulse 3.2 s later. the speed of sound in water is 1500 ms1. find the distance of the submarine from the wavelength of the pulse and the
asked by sake 
chemistry
How do you tell what dyes are more polar than others?
asked by Jordan 
Algebra 2
Can someone check my answers. Write the following equations in standard form. 1) x^2  2x + y^2 + 4y = 11 answer: (x1)^2 + (y+2)^2 = 16 2) 4x^2 + 24x  y + 34 = 0 answer: y = 4(x3)^2 + 2 3) The graph of which equation is a circle? A. 5x^2 + 10x = 9 +
asked by Troy 
Math  FredR
I asked about radians yesterday,you told me that a circle has 360 degrees or 2 pi radians, so: radians = 2.7*pi/180 Would the answer be 0.047
asked by sue 
chemistry
What is the coefficient of oxygen in the following equation for the reaction of potassium (K) with oxygen (O2) to form potassium oxide (K2O? __ K + ___ O2 > ___ K2O is it 4, 3, 2, or 1?
asked by Sarah 
french
When I want to say this monday, can i say ce lundi? or does it have to be le lundi?
asked by janice 
Physics
1)As a sound source moves away from a stationary observer, the number of waves will. A)increase B)decrease C)remain the same D)need to know the speed of the source (answer:decrease.) As the detector recedes from the source, the relative velocity is
asked by Jon 
chemistry
If a mole can dig a mol of holes, how many holes can a mol of moles dig? a. 36 x 1023 b. 3.6 x 1047 c. 6 x 1024 d. 6 x 1046
asked by Sarah 
chemistry,again
3 Fe2O3 + 1 CO → 2 Fe3O4 + 1 CO2 how many grams of Fe2O3 are needed to prepare 255 g of Fe3O4? a. 118 g b. 552 g c. 264 g d. 383 g
asked by Sarah 
bio
1. You have characterized two distinct genetically inheritable traits. They are inherited together most of the time, but not always and sometimes their phenotypes disappear altogether, only to reemerge in later generations. Try to explain how this type of
asked by jay 
math
I need to find the difference of this interger question by adding the opposite. Not sure what that means (+10)(+6)
asked by S.D. 
statistics
Poor teacher n=6 m=6 SS=30 Avg teacher n=8 M=2 SS=33 Good teacher n=10 M=2 SS=42 N=42 G=72 Sigma squared= 393 *HOW DO I OBTAIN THE TOTALS FOR THE GOOD TEACHER, AVG TEACHER, AND POOR TEACHER. THEY ARE NOT GIVEN IN THE PROBLEM. alpha level=.05 I did a one
asked by Genova 
french
How do you say I am hungry in the morning? Is it, J'ai faim du matin.
asked by janice 
literature poetry
the line " I wandered lonely as a cloud" is an example of A. a metaphor B. a simile c. a couplet d. alliteration
asked by tonya 
pre calc
Two forces of 50 and 70 N (newtons) act on an object. The angle between the forces is 40°. Find the magnitude of the resultant and the angle that it makes with the smaller force.
asked by Julie 
I updated my intro paragraph, is it better?
Salman Rushdie, the author of Midnight’s Children, and Arundhati Roy, the author of The God of Small Things, both employ similar writing styles in their respective novels. Midnight’s Children is a story about Saleem Sinai, the protagonist of the novel,
asked by PaRpAt 
physics
1)Specular reflection obey the laws of of reflection while diffuse reflection does not? false. They both obey 2)A convex mirror forms a virtual, diminished, and upright image for all real objects regardless of the location of the object. true
asked by Jon 
physics
1)A convex mirror of focal length 10 cm forms an upright and magnified image of a real object placed at a distance of 20 cm from the mirror. false 2)A concave mirror of focal length 10 cm forms an upright and diminished image of a real object placed at a
asked by Jon 
physics(please help)
a planet orbits a star with period T. As seen from that planet the star's diameter subtends an angle of theta radians. Show the density of the star is given by rou=24pi/G(T^2)theta^3 please help!!!
asked by POD 
chemistry
Are these formulas correct? pH + pOH = 14 pH = log[H+] pOH = log[OH] [OH] = 10^pOH pH = 10^pH
asked by Sarah 
social studies
in slavery a person who is running away is a
asked by quinten 
english
PLEASE SHOW ME THE PROPER PLACES TO PUT THE COMMAS IN THIS SENTENCE: Athens a city in Greece named after Athena the Greek goddess of war and wisdom
asked by Sydney 
physics EM
A 59.0 turn, 4.10cmdiameter coil with R = 0.530 {\Omega} surrounds a 1.70cmdiameter solenoid. The solenoid is 21.0 cm long and has 170 turns. The 60 Hz current through the solenoid is I_sol = (.470A)*sin(2*pi*f*t). I guess f is the frequency. Find the
asked by Spencer 
Math
Mica reads about 44 pages in a hour. About how many pages will she read in two and three fourths of a hour.
asked by Hunter 
Chemistry
A solution is made by mixing 25.0 mL of toluene C6H5CH3 d=0867gmL with 135.0 mL of benzene C6H6 d=0874gmL . Assuming that the volumes add upon mixing, the molarity (M) and molality (m) of the toluene are how would i start this problem?
asked by Riley 
Chemistry
? g of glucose C6H12O6 must be dissolved in 400 g of water to give a solution that is 0.258 m.
asked by Riley 
chemistry
(x)(x)/(.001x) = Kb (x^2)/(0.001  x) = 1.0 x 10^6 So, in the form of ax^2 +bx + c = 0 this is x^2 + 0.001x + 1.0 x 10^6?
asked by Dustin 
Chemistry
When 0.500 g of an unknown compound was dissolved in 15.0 g benzene, the freezing point depression was determined to be 0320C . The molar mass of the unknown compound is ? g/mol. (The freezing point depression constant for benzene is 512C kgmol .
asked by Riley 
chemistry
What mass in grams of potassium hydroxide is contained in 500 mL of solution that has a pH of 11.5? Your response: [OH] = 1.0 x 0^14 / 11.5 This isn't correct. If the pH is 11.5, then the pOH = 14  11.5 = 2.5 = pOH and (OH^) = 0.00316 M. It appears to
asked by Dustin 
Physics
If the critical angle for light at an interface between certain substances is 54.2 degrees, what is the polarizing angle at this same interface? I am confused!
asked by J 
prealgerbra
what is unit rate???
asked by kk 
AED 201
I need info. on the daily activities of a typical day for an educator (at the elementary or secondary level). The list and discussion of three time management tips should be attached as separate documents. I am going to be an elementary teacher.Please help
asked by Dawn 
chemistry
A 0.25 mol/L solution of benzoic acid, KC7H5O2 and antiseptic also used as a food preservative, has a pH of 2.40. Calculate the Ka of benzoic acid at SATP My work: C6H5COOH > C6H5COO^ + H^+ Ka = (C6H5COO)(H+)/ C6H5COOH I know my next steps are to use
asked by Dustin 
English
Doing a crosswor puzzle dealing with plot, characters, setting, etc. The clue is "part of the plot the goes back in time" There are 9 letters needed, with the third and seventh letters being an "A".
asked by Taya 
chemistry
A student prepares a 0.20 mol/L aqueous solution of ascorbic acid and meausres its pH as 2.40. Based on theis evidence, what is the Ka of ascorbic acid? H+ = 0.00398 C is the same (HC) = 0.2 = 0.00398 (0.00398)(0.00398) / 0.0199 =0.000796 Hi DrBob222 you
asked by Dustin 
Debate
I am new at debate and i need help on the new CX debate cause i have a 6 weeks grade and the teacher wont help me so i need help writing an affermative CX case on RESOLVED: the united states federal government should substantually increase alternative
asked by Samantha 
chemistry
What mass in grams of potassium hydroxide is contained in 500 mL of solution that has a pH of 11.5? I have a pOH of 2.5 to get [OH] I do 10^2.5 to get 0.001581138 Then I divide this by 2 to find the mols in 500 mL Then, grams = mols x molar mass =
asked by Dustin 
biology
how are cells relevant in news today
asked by xoliswa 
Physics
How do you write 25um in scientific notation?
asked by Dana 
chemistry
Caclulate the Ka of nitrous acid if a 0.200 mol/L solution at equilibrium at SATP has a percent ionization of 5.8% ka=(H+)(NO2)/(HNO2) If 1.59% ionized then after ionization H+ = 0.2 x 0.058 =? NO2 = 0.2 X 0.058=? HNO2=0.2 x (1.0  0.058) If solution is
asked by Dustin 
Representing Human Traits
I'm confused on when to use a two capital letters, two lowercase letters or one of each. This is for traits. We just started it in Biology. It has something to do with heterozygous and homozygous dominant and homozygous recessive and so on. For example Pp
asked by Human Traits 
physics
1)A convex lens is used to obtain an enlarged virtual image. false. 2)The lens of the eye has a fixed focal length. false.
asked by Jon 
Physics
An electron strikes the back of a TV screen at 1/10 the speed of light. What is the speed of the electron? What is the momentum of the electron? What is the deBrogile wavelength of the electron?
asked by Dana 
geometry
true or false:all parallelograms have opposite angles that are supplementary
asked by kayley 
English
Is the comma right in this sentence? If not, what other punctuation can I use? “Where Are You Going, Where Have You Been?” tells the story of a teenager named Connie who is stalked by an older man, Arnold Friend.
asked by JM 
Science
An argumentative article for the Sunday Gleaner discouraging people from hunting endangered species.
asked by Michelle 
Psychology
Hi, I have to do a research paper on the movie "Bobby" directed by Emilio Estevez. I have to choose one character and apply two theories to a character from the movie. The theories can be Psychoanalytic, Neoanalytic, Behaviorist, Cognitive, etc... I have
asked by Marie 
English
Is the punctuation right in this sentence? (the semicolon doesn't seem right) In another of Oates’s stories; “Heat“, the main characters were also deprived of the future because of their curiosity and loneliness
asked by JM 
Physics
A mirror on the passenger side of your car is convex and has a radius of curvature with magnitude 18 cm. (a)Another car is seen in this side mirror and is 13 m behind the mirror, if the car is 1.5 m tall, what is the height of its image? I can't figure
asked by J 
English  Grammar
Should there be a comma before "be alone" in this sentence? The bond between them was so strong that Rhoda knew she could not leave Rhea and be alone.
asked by JM 
Economics
why with international trade, the domestic economy's consumption possibilities curve can be greater than the domestic economy's production pssibilities curve.
asked by Josh 
English
Please help. How can I word this better? Rhea did not even question why they can not just all go together up to his room.
asked by JM 
economics
How do market failure play a part in which a publicly funded health care system performs better than a privately funded system?
asked by Ge 
chemistry
Which of the following is NOT true of colligative properties? Colligative properties are... A. dependent on the mass of solute present. B. responsible for lowering the vapor pressure of a solution versus the vapor pressure of the pure solvent. C.
asked by david 
Physics
a 10kg table needs to be pushed across the floor (µ=3). u stand behind it and push it at an anjgle of 30 degrees down with a force of 60N. wats the acceleration of the table?
asked by Colin 
Essay
Hi, I have to write a web article evaluation paper. The professor wants us to pick a casual article that has to do with child development and family studies. Then, he wants us to use scholarly sources to evaluate the article. I don't know what a casual
asked by Bizzy 
Math
I question that 1+1=2. Prove to me that it does. For example I have one car and then buy another car. How many cars do I know have? For English 1+1 does equall two but in math it doesen't. My proof is as follows. I have one sheet of paper. I put another
asked by Joe Smith Bob 
Biology
I'm confused on when to use a two capital letters, two lowercase letters or one of each. This is for traits. We just started it in Biology. It has something to do with heterozygous and homozygous dominant and homozygous recessive and so on. For example Pp
asked by Joe Smith Bob 
math
which allows you to convert pounds and tons to ounces?
asked by robert 
physics EM please
please look at my earlier question below thank you
asked by Spencer 
Algebra 1
How do you do Polynomials
asked by Shakira 
URGENT  Chemistry
When 0.500 g of an unknown compound was dissolved in 15.0 g benzene, the freezing point depression was determined to be 0320C. The molar mass of the unknown compound is ?? g/mol. (The freezing point depression constant for benzene is 5.12C kgmol. I really
asked by Jessica 
Biology
a genetisict studying coat color in animals crosses a male bunnicula having the genotype CC with a female having genotype Ccand the little subscript letters ch. The geneticist then crosses a cc(small letters ch) male with a Cc(small letter c) female. make
asked by Emily 
math
Susan has $25. She is going to spend $4 on a book, then $3 per day on lunch. a)Write an equation that represents the following question: "How many days can Susan buy lunch using this plan?" b) Solve your equation, and check your solution.
asked by sam 
Science
i have to do this packet about magnetism, but we havent even learned anything about it yet. I have got some of the answers but i cant figure out the rest. What do you need to make an electromagnet? What is an advantage of using an electromagnet? Name 3
asked by Emily 
Mathhelp!!!
Elly writes the following expression on the blackboard. (13+24)+0+7 Use three properties of addition to simplify the expression. Include the names of the properties you use. what properties of addition are there cause im not sure!!!!
asked by Busy 6 
chemistry
Please calculate the pH and [H+] of a 0.30 mol/L solution of butanoic acid,. The Ka of butanoic acid is 1.52 x 10^5
asked by Ross 
chemistry
Strychnine, C21H22N2O2(aq) is a weak base but a powerful poison. Calculate the pH of a 0.001 mol/L solution of strychnine. The Kb of strychnine is 1.0 x 10^6 My work: I called Strychnine SN SN + HOH > SNH+ + OH Kb = (SNH+)(OH)/(SN) (SNH+) = x (OH) =x
asked by Ross 
chemistry
Strychnine, C21H22N2O2(aq) is a weak base but a powerful poison. Calculate the pH of a 0.001 mol/L solution of strychnine. The Kb of strychnine is 1.0 x 10^6 My work: I called Strychnine SN SN + HOH > SNH+ + OH Kb = (SNH+)(OH)/(SN) (SNH+) = x (OH) =x
asked by Ross 
math
Kevin and Zach are playing a number guessing game. Kevin says, "I am thinking of a number. If you double it and then subtract one, the result is 7." a) Write an equation that Zach could solve to find Kevin's number. b) Explain the steps Zach could use to
asked by sam 
chemistry
Calculate the pH of the following aqueous solutions: 1.00 mol/L sulfuric acid H+ = 1.00 M for the first ionization THe second one is guided by K2 K2 = (H+)(HSO4)/(HSO4) Plugging in K2 as follows: H+ = 1.00 + x SO4 = x HSO4= 1.00  x Can someone please
asked by Ross 
chemistry
Calculate the solubility of calcium sulfate 0.010 mol/L calcium nitrate at SATP
asked by Ross 
chemistry
If 1.00 mol of iodine and 0.50 mol of chlorine are initially placed into a 2.00 L reaction vessel at 25 degrees celsius, find the concentrations of all entities at equilibrium
asked by Kelsy 
Quadratic Functions
I need help solving this equation: y=2x^+3 And you do need to graph this equation so can someone please help me?
asked by Megan 
chemacid base titrations
If 20.0mL of .2019M HCI requires 39.63mL of a NaOH solution for complete neutralization, what is the concentration of the NaOH solution? how many significant figures are justified in the answer?
asked by natash 
physics
1)A 5.0 cm real object is placed at a distance of 30.0 cm from a concave mirror of focal length 10.0 cm. Find the location of the image. (30)(10)/5.0 15 or (30)(5.0)/10 60 I don't know which one 2)What must be the minimum height of a plane mirror so that a
asked by Jon 
grammar 3rd grade
Is this a run on? One group looks like a bear another is like a lion. I am confused.
asked by Toni 
math
Find each or difference.You may use fractions strips to help.
asked by Laurel hill 
geometry
Having to do with special segments in a circle, P is diameter, AC=3 BC=5 AD=2. FIND PD, FIND ED, FIND PB
asked by jean 
nutrition
I need to develop a plan for a health unit on "What makes us grow?" based on a class size of 15 children.Any ideas?
asked by Ale 
Math
How do you graph the equation y=kx?
asked by Alexa 
Science
Name and describe two ways in which magnetism is used in technology related to medicine? Im really not sure of the answer to this, but i do know that magnetism is the force of attraction or repulsion.
asked by Jenna 
math/Geometry
Having to do with special segments in a circle. P is diameter, BC=5 AD=2 Find PD, ED, PB.
asked by Jean 
Accounting
Please double check me. Indicate whether a debit or credit decreases the normal balance of each of the following accounts. Office Supplies debit Repair Service Revenue debit Interest Payable debit Accounts Receivable creditSalaries Expense debit Owner
asked by Kim 
Social Studies
1)What's Indiana's natural resources. 2)What's the most important way to make money in Indiana? Please give long answer with more info. or the website.
asked by Anonymous 
Legal
Can you direct me where I can find this information? I can't figure it out... Thank you! Who owns forest trees when the land on which they are growing is so0ld? The new owner, the old owner, the public, the courts? I believe it's the New owner but can't
asked by Justie 
science
an adult male's heart pumps about 2.8 million liters of blood a year. It his heart beats 70 times a minute, how much blood does his heart pump with each heart?
asked by kimberly 
English
Is it possible to form sentences with just nouns and verbs?
asked by Shelby 
accounting
I have a project due on the Colo Company can anyone help figure out the worksheet
asked by dan 
Vectors
I am really lost and confused! Consider the lines r = (1,1,1) + t(3,2,1) and r = (2,3,0) + u(1,2,3). a) Find their point of intersection. b) Find a vector equation for the line perpendicular to both of the given lines that passes through their point of
asked by Alex 
science
how is the rivers and oceans so important to us besides it provides water and habitat?
asked by Shelby 
Physics
The crystalline lens of the human eye is a double convex lens made of material haveing an index of refraction of 1.44. Its focal length in air is about 8 mm which also varies. We shall assume that the radii of curvature of its two surfaces have the same
asked by J 
english
is tonight a noun or verb?
asked by Shelby 
Geometry
Hello, Can someone please tell me if I have the correct answer? Thank You, My answer: 25 sq. ft. What is the area of a sector of a circle that has a diameter of 10in. If the length of the arc is 10in.?
asked by Mandi 
Geometry
Hello, Can you please tell me I have the right answer? Thank You my answer: 12 ft. The radius of curvature is 10ft and the height of the segment is 2ft. What is the length of the chord?
asked by Mandi 
calculus
what is the median waiting time for f(x)=((1/8)e^(x/8))? I said the answer was 5.55 is this correct? thank you!
asked by tia 
english
if i say ''cocoa ran fast.'' is that still only using nouns and verbs?
asked by Shelby 
calculus
how would you find the median of a pdf picture it basically is a triangle with points (0,0) (6,.2) (10,0) do i need to find the slopes to find equations for the lines? thanks!
asked by tia 
Chemistry
How would you find the Kb of a weak base??
asked by HELP!!! 
Computer Science
In the program Turing, how would you move an box randomly around the screen. This is what I have so far: for row: 3..10 for column: 10..30 locate (row,column) put " ".. end for I think this creates a box. How would I move this box across the screen by only
asked by Lena 
Adv. Math
Find the interest to the nearest cent Question #1 Amount: $5432 Annual Interest Rate: 6.2% Time: 3 years Question #2 $4500 at 5.5% for 4 1/2 years Question #3 $3680 at 6.75% for 2 1/4 years Question #4 5.5% for 1 3/4 years on $2543 I'm sorry for so many
asked by Kenya 
spanish
I need to describe my spring break in Spanish day by day. I think she said presenttense, I copied this chart off the board. AR Yo e Nos amos ER Yo e Nos imosemos Is that present? So my question is, in that tense, how would I say "I go"?
asked by Zoe 
Vectors  Reiny
Thank you for the help! "When I solved equations 2 and 3 I got u=0 and t=1, giving me r = (2,3,0) in both r = ... equations." Ok I'll check that. I just have a question...how would you get r = (2,3,0) when u = 0 and t = 1?
asked by Alex 
Maths (Logs)
1.Write the following equation without logs log y = mx+ c This would be y = 10^(mx+c) right? 2. Explain why this fits the exponential model (in other words, it can be written in the form y = a x b^x where a and b are real numbers).
asked by BP 
11th Grade US History
Why was James A. Garfield assassinated? What was the motive of the assailant(Charles Guiteau) What was the effect of the assassination on the American public?
asked by Britney 
Legal
I posted this a minute ago but it didn't show up so if it shows up twice, sorry! I have read my book twice now and can't figure this one out. Can you please tell me where I can find this information? When one person has partial possession of a parcel of
asked by Justie 
accounting
If total assets decreased by $47,000 during a period of time and owner's equity increased by $24,000 during the same period, then the amount and direction (increase or decrease) of the period's change in total liabilities is ________. $23,000 increase
asked by tomika 
accounting
Joe Brown invests $10,000 into his new business. How would the journal entry for this transaction be entered in the journal? Cash 10,000 Brown, Capital 10,000 Invested cash in business Cash 10,000 Brown, Capital 10,000 Invested cash in business Brown,
asked by tomika 
accounting
The following adjusting journal entry was found on page 4 of the journal. Select the best explanation for the entry. Wages Expense 2,555 Wages Payable 2,555 ???????????????? Record the payment of wages Record wages to be paid this month Record wages paid
asked by tomika 
Biology
What are the different types of microscopes? Does a normal light microscope allow you to see DNA?
asked by Will 
science(chem)
Ka/Kb for the acetanilide being told that on the basis of this it will tell me whether a nitrogen or oxygen are protonated... (molecule: 4bromoacetanilide) Thanks
asked by ~christina~ 
Adv. Math
Ok my last question for this Interest stuff Woo! Ok this is the question: What is the annual interest rate if $1600 is invested for 6 years and $456 in interest is earned?
asked by Kenya 
physics
Can you help me with the problem below? Any help is appreciated! A pair of narrow, parallel slits separated by 0.250 mm are illuminated by the green component from a mercury vapor lamp (ë = 546.1 nm). The interference pattern is observed on a screen 1.20
asked by Anonymous 
algebra
How do you know when an equation has infinitely many solutions? How do you know when an equation has no solution?
asked by Will 
algebra
a(squared)/(ab)+ b(squared)/(ba)
asked by Ashley 
algebra
(x+1)/(x+3)(x3) + 4(x3)/(x3)(x+3) + (x1)(x3)/ (3x)(x+3) please explain how you get it
asked by Ashley 
US History
What precautions are now taken to protect the president? I know we have the secret service but is there anything else?
asked by Britney 
chem
write the net ionic equation for the unknown titration reaction in this experiment. KHC8H4O4(aq) + NaOH(aq)> KNaC8H4O4 + H2O(l)
asked by natash 
chem lab
when setting up their experiment, a student discovered that the solution in their flask turned bright pink upon adding 2 drops of the indicator, even before beginning the titration. what do you suspect was the mistake that the student made?
asked by natash 
chem> front page report
wondering if this looks good or should I make the format some other way. Multistep Synthesis of 4Bromo2Chloro6Iodoaniline name school Chem###sec## Multistep A,B March 13,2008 Multistep C March 20,2008 Multistep D March 27, 2008 Multistep E April 03,
asked by ~christina~ 
Physics/Dynamics
A series of small packages are being moved by a thin conveyor belt that passes over a 300mm radius idler pulley. The belt starts from rest at time t=0 and its speed increases at a constant rate of 150mm/s^2. Knowing that the coefficient of static friction
asked by Kyle