Questions Asked on
April 23, 2013

AP Chem
CH3CH2NH2(aq) + H2O(l) CH3CH2NH3+(aq) + OH(aq) Kb = 5.0e4 Ethylamine, CH3CH2NH, a weak base reacts with water according to the equation above. A 50.0 mL sample of a ethylamine solution is found to have a pH of the solution 11.60. (a) Write the expression
asked by Jess 
Statistics
A sport preference poll yielded the following data for men and women. Use a 5% significance level and test to determine if sport preference and gender are independent. Sport Preferences of Men and Women Basketball Football Soccer Men 20 25 30 75 Women 18
asked by Terrance 
statistics
2. Why is it important to know the mean and standard deviation for a data set when applying the empirical rule? 3. If we are focused on 68% of the normal distribution, what percentage of the distribution is left in the upper tail only? 4. What value
asked by Cam 
earth
On the windward side of the mountain, should the relative humidity of the parcel change as it rises from 2000 m to 4000 m?
asked by Anonymous 
MAnagerial Economics
In the long Run Who play a dominant role. Options: Income, Demand, Supply, Price.
asked by Rahul 
Statistics
Based on information from Harper's Index, 37 out of a random sample of 100 adult Americans who did not attend college believe in extraterrestrials. However, out of a random sample of 100 Americans who did attend college, 41 claim that they believe in
asked by Torri 
physics
Consider three charges q1 = 6.0 µC, q2 = 1.8 µC, and q3 = 2.8 µC, arranged as shown below. Q1 is positive and is 3 cm away from Q2. Q2 is also positive and is 2 cm away from Q3 which is negative. (a) What is the electric field at a point 1.0 cm to the
asked by wendlen 
Psychology
An essential part of scientific thinking is not only how to use statistics correctly, but also how to identify the misuse of statistics. Our textbook authors suggest that students should: Answer distrust all statistics because they convey a false
asked by J.J 
Chemistry
Galena(PbS) and cerussite(PbCO3)are two ores of lead. A mining company is considering which of these two ores to use for the extraction of lead. The equations for the reactions occurring are process using galena: 2PbS+3O2 > 2PbO+2SO2 2PbO+C >
asked by Qindan 
Math
What is the difference between exploratory and formal studies?
asked by Tameika 
Psychology
Dr. Allen is trying to determine the best method by which to draw a comparison between the amount of time his students spend in the library to the grade point average of his students across the spectrum. Which research design should Dr. Allen follow, and
asked by J.J 
Life orientation
in 1015 lines discuss ways in which pollution impacts the community.
asked by Bongeka 
math
i have a test tomorrow and im still not sure how to do this. can you please help me? p={a,b,c} Q={a,c,d,f} QP=?
asked by aisha 
history
what was One major reason for religion’s growing appeal in the 1950s?
asked by Anonymous 
maths
express 108a^4b^3 whole cube root in the simplest form?
asked by tuhituhi 
Business Math
A Competitive Coup in the InFlight Magazine. When the manager for market intelligence of AutoCorp, a major automotive manufacturer, boarded the plane in Chicago, her mind was on shrinking market share and late product announcements. As she settled back to
asked by Tameika 
Math
What is the difference between experimental and ex post facto research designs?
asked by Laura 
Psychology
Consider the interpretation of psychological findings. You are taking a multiple choice assessment, similar to this one, when you encounter a quandary. You see a series of four possible answer choices, two of which seem very plausible conclusions. What do
asked by J.J 
landmark project
did any workers die while building the palace of fine
asked by Emily 
Math
Suppose f(x) is a polynomial of degree of 5 and with leading coefficient 2009. Supposdm further that f(1) = 1, f(2) = 3, f(3) = 5, f(4) = 7, f(5) = 9. What is the value of f(6). The answer given in book is 241091. Please work the complete solution.
asked by Watson 
Physics
Suppose that we repeat the experiment shown in the video, but we replace one of the cylinders with a cylinder that has twice the radius (and use larger containers of water). If the height of the original cylinder is \rm h, how deeply must we submerge the
asked by H 
Chem
An electrochemical cell based on the decomposition of H2O2 can be constructed based on the halfreactions in the table below. HalfReaction  Standard Reduction Potential, E° H2O2+ 2e => 2 OH  0.88 V O2+ 2 H2O + 2e => H2O + 2 OH  0.15 V (d)
asked by Jess 
Math
To determine whether a pancreas is functioning normally, a tracer dye is injected. A normally functioning pancrease secretes 4% of the dye each minute. A doctor injects 0.5g of the dye, and checks twenty minutes later. He finds that 0.35g of the dye
asked by Mercy 
Math
The interquartile range of a data set is the ? of the ? quartile and the ? quartile. and........ In a boxandwhisker plot, one whisker represents about ?percent of the data.
asked by Karen PLEASE HELP! 
math
find the present value of the following future amount. 600,000 at 6% compunded semiannually for 25 years what is the present value
asked by stacy 
UL Lafayette
Suppose that 2000 is loaned at a rate of 9% , compounded monthly. Assuming that no payments are made, find the amount owed after 4 years.
asked by Jasmine 
Finance
"Find the payment necessary to amortize a 4% loan of $2100 compounded quarterly with 13 quarterly payments. Find the payment size."
asked by Anonymous 
Psychology
Janet has been attending Killian High School for three years. At the beginning of her senior year, she is enrolled in Ms. Brosham's AP English Class. She heard from her two older siblings that Ms. Brosham was a hardnosed, crusty teacher who did not
asked by J.J 
Statistics
The Toylot company makes an electric train with a motor that it claims will draw an average of only 0.8 ampere (A) under a normal load. A sample of twelve motors was tested, and it was found that the mean current was x = 1.26 A, with a sample standard
asked by Torri 
PHYSICS
In lab, Will burns a 0.6 peanut beneath 48 of water, which increases in temperature from 22 to 46. The amount of heat absorbed by the water can be found with the equation , where is the amount of heat, the specific heat of water, the mass of water, and
asked by Ericca 
physics
A sample has a activity of 0.0065 Bq per gram of carbon. (a) Find the age of the sample, assuming that the activity per gram of carbon in a living organism has been constant at a value of 0.23 Bq. (b) Evidence suggests that the value of 0.23 Bq might have
asked by PLEASE AND THANK YOU 
DYNAMICS OF CATERING
Which of the following behaviors is considered acceptable table manners?
asked by caver 
math
An alcohol solution consists of 6 gallons of pure water and x gallons of alcohol, x > 0. Let f(x) be the ratio of the volume of alcohol to the total volume of liquid. [Note that f(x) is the concentration of the alcohol in the solution.] (a) Find a possible
asked by emily 
mechanics
what force is required to accelerate a body with a mass of 18 kilograms at a rate of 36 m/s2?
asked by rea hardy 
Physics
In a photoelectriceffect experiment it is observed that no current flows unless the wavelength is less than 570nm . A)What is the work function of this material? W0= in eV B) What is the stopping voltage required if light of wavelength 420nm is used?
asked by Allen 
CHEMISTRY
You carry out a reaction with 28.9mL of 0.711M solution of NiNO3)2. The reaction has a change in H of 26.4KJ/mol rxn. What is the q, the heat of the reaction, in joules? I first found the mols of the solution using molarity and then found the joules of
asked by markymark 
physics
Bill has a mass of 83.6 kg. Jane has a mass of 51.0 kg. If they are seated 4.3 m apart, how much gravitational force attracts them?
asked by chad 
chemistry
In a bottle of unopened cola, the CO2 dissolved in the liquid is in equilibrium with the CO2 gas above the liquid. The dissolved gas reacts with water molecules in the liquid to from carbonic acid, which also dissociates into carbon dioxide and water.
asked by Angeline 
physics
At the instant the displacement of a 2.00 kg object relative to the origin is d = (2.00 m) ihat + (4.00 m) jhat  (3.00 m) khat, its velocity is v =  (6.20 m/s) ihat + (2.70 m/s) jhat + (2.60 m/s) khat, and it is subject to a force F = (6.00 N) ihat 
asked by tae 
Physics
If in a manufacturing company they want to produce a system where the force F1 must be 10% of the output force F2.if the area of the pistol (where F1 is applied)is 450 spuare milimetre.calculate the diameter of the pistol two where F2 is an output force
asked by Emmah 
english
what do i capitalized in this sentence.john grisham is the author of "the street lawyer".
asked by shay 
Chemistry  Urgent Please help!!
The problems: 0.0513 grams of Al (Wt. 27.0) was reacted with excess HCI to produce H2 according to the following balanced equation: 2 Al + 6 HCI > 2 AlCl3 + 3 H2 a) Determine the number of moles of H2 evolved from that quantity of Al when collected over
asked by Kishwa 
physics
A 10,000N car is on a roller coaster. at the top of the tallest hill (position 1) the reaches a hieght 36m above the lowest point on the roller coaster (position 2). after accelerating down the hill the roller coaster makes another (position 3) climb that
asked by shkell 
physics 2
A sample has a activity of 0.0065 Bq per gram of carbon. (a) Find the age of the sample, assuming that the activity per gram of carbon in a living organism has been constant at a value of 0.23 Bq. (b) Evidence suggests that the value of 0.23 Bq might have
asked by PLEASE AND THANK YOU 
College algebra
Solve equation by expressing each side as a power of the same base & then equating exponents. e^x+5=1/e^6
asked by Erica 
Math
Find the payment necessary to amortize a 4% loan of $2100 compounded quarterly with 13 quarterly payments. Find the payment amount.
asked by Anonymous 
Physics
An object is placed 19.6 cm to the left of a diverging lens (f = 7.84 cm). A concave mirror (f = 11.2 cm) is placed 27.3 cm to the right of the lens Find the final image distance, measured relative to the mirror (cm)
asked by Elizabeth 
Stats
A production process produces an item. In a recent study, the company found that 20% of all items produced were defective. Each item is inspected before being shipped. 10% of the items were misclassified( labeled as defective when they were good or labeled
asked by Richard 
Algebra
A circular mirror is surrounded by a square metal frame. The radius of the mirror is 5x. The side length of the metal frame is 15x. What is the area of the metal frame? Write your answer in factored form.
asked by Casey 
Chem
Ca(s) + 2H+(aq) → Ca2+(aq) + H2(g) An experiment is performed to determine the volume of hydrogen gas produced when calcium reacts with excess HCl(aq) as represented by the net ionic equation above. A 0.0720 g sample of pure calcium and a solution of 1.0
asked by Jess 
Physics
A 43 g ice cube at 0 C is placed in 882 g of water at 81 C. What is the final temperature of the mixture? The specific heat of water is 4186 J/kg · C and its latent heat of fusion is 3.33 × 105 J/kg . Answer in units of C
asked by dallas 
Algebra 2
Suppose you are researching the eating habits of people your age. What sampling method could you use to find the percent of students in your grade who eat five servings of fruit and vegetables each day? What is an example of a survey question that does not
asked by Amy 
math
please show me how to solve this (2x  5y) power of 2 i am having a problem with the way to step by step please solve this
asked by kenny 
Life Orientation
Identify and describe 3 environmental health hazards that cause ill health, crisis and or disasters
asked by Linely 
Angular Resolution
An astronomer wants to determine whether or not he or she can photograph Castor and Pollux at the same time on a 5 x 8 inch plate using a lens system with a 1200 mm focal length. If the two stars are approximately 5 degrees apart, will it be possible to
asked by Blake 
calculus
The radius of a cone increases at the rate of 0.3 inches per minute, but the volume remains constant. At what rate does the height of the cone change when the radius Is 4 inches and the height is 15 inches?
asked by Helpeeee 
science
Why do you have to filter the Ca(OH)2 solution before loading it into the burette?
asked by ghasan younis 
Maths
3m=12
asked by Anonymous 
chemistry
concentrated sulfuric acid is typically 18.1 M H2 SO4. Calculate the volume in mL of concentrated sulfuric acid needed to prepare 125 mL of a 0.100 M H2SO 4 solution
asked by Rachael 
algebra
find the vertex of 40016tsquared
asked by jj 
CalculusDifferentialsCheck please?
if the sides of a cube are measured with an error of 2% use differentials to estimate the relative error in the volume df= 3x^2 * dx df= 3x^2 * 1/50 df= 3/50*x^2 is this right?
asked by Liliana 
statistics
What is the probability that 10 of 100 apples will be < 130 g? mean=173 std deviation=34?
asked by Liz 
algebra
what ca be concluded from the box below x+3>7 then x+33>73 a:x3 b:x+33>73 c:
asked by jj 
Social Stuides
Which problems in the 1890s led farmers to take political action?
asked by Anonymous 
algebra
if x is a x real number what is the sum of x and the opposite of x a1 b0 c:x d x+1/x
asked by jj 
Math
What is the difference between Descriptive and casual studies?
asked by Laura 
life orientation
in 1015 lines critically discuss 5 ways in which the human or environmental problem impact on the community
asked by sylvia 
algebra 2
a twodigit counting number has a value that is 13 greater than 3 times the sum of the digits. If the units digit is 1 greater than the tens digit, what is the number
asked by chris 
Pre Calculus
Use a calculator to evaluate csc 3ð/14 A. 1.604 B. 1.279 C. 47.686 D. 42.314 E. .739
asked by Deontre 
Math
Why 1/2 of 1 is 1/2, what is half of 2,3, and 4/
asked by Aimee 
Math
Let Alpha and Beta be the zeros of the cubic polynomial x^3 + ax^2 + bx + c satisfying the relation Alpha * Beta = 0. Prove that : c^2 + ac + b + 1 = 0. Please work the complete solution.
asked by Watson 
World Geography
Cultures often develop along with science and ____________.
asked by Caroline 
Chemistry
how many joules and calories are produced from the reaction CaCl2+H2O=HCl+CaOH
asked by Gabe 
Math
An equilateral triangle ABC has AB=20√3. P is a point placed in triangle ABC and D,E and F are the foot of the perpendiculars from P to AB, BC and AC, respectively. If PD=9 and PE=10, what is the value of the length of PF? Please work the complete
asked by Watson 
calculus
the telephone company is planning to introduce two new types of executive communications systems that it hopes to sell to its largest commercial customers. It is estimated that if the first type of system is priced at x hundred dollars per system and the
asked by aj 
Shakespeare
What are Shakespeare beliefs, attitude, time, heritage, and experiments.
asked by Anonymous 
life orientation
in 1015 lines critically discuss 5 ways in which Hiv/Aids impact on the community
asked by lerato mahlaela 
Macroeconomic 668
If the mortgage rate rises from 5% to 10% yet the appreciation of houses that consumers can buy rises from 2% to 9% would you be more likely or less likely to buy a house as an investor?
asked by Moo 
Chemistry
3. Using Bohr’s model of the atom, calculate the energy required to move an electron from a ground state of n = 2 to an excited state of n = 3. Express your answer in both J/photon and kJ/mol.
asked by Brad 
Math
Let p and q be the roots of the polynomial mx^2 + x(2  m) + 3. Let m1 and m2 be two values of m satisfying p/q + q/p = 2/3. Determine numerical value of m1/(m2)^2 + m2/(m1)^2. Please work the complete solution.
asked by Watson 
Statistics
The manufacturer of a new compact car claims the miles per gallon (mpg) for the gasoline consumption is moundshaped and symmetric with a mean of 24.6 mpg and a standard deviation of 11.2 mpg. If 30 such cars are tested, what is the probability the average
asked by Terrance 
matemáticas
Why did the Boy sheep plunge off a cliff while chasing the fiel sheep?
asked by Jesús 
Physics
Find the potential difference across each resistor in the figure below. (R1 = 5.24 , R2 = 3.85 , R3 = 3.30 , R4 = 2.00 ) VR1 = V VR2 = V VR3 = V VR4 = V     ___ ___ ___ 12V 3V 18V             R1 R2 R4    ______R3__
asked by Anonymous 
math
slope = 2, passing through (0, 3) equations for each line pointslope, slopeintercept form
asked by Holli 
Physics
When UV light of wavelength 295nm falls on a metal surface, the maximum kinetic energy of emitted electrons is 1.50eV. What is the work function of the metal? W0 in eV
asked by Sheila 
Physics
Photons of energy 12eV are incident on a metal. It is found that current flows from the metal until a stopping potential of 8.0V is applied. What would happen if the wavelength of the incident photons was tripled? Would the energy be 4eV,so 12/3=4, and
asked by Sheila 
English
I need help understanding this topic question  "The banality of horror is what is truly frightening".
asked by Melonie 
math
Submit the two equations that represent the cost of going to the gym based on if we join or do not join. Identify the number of times a person would go and have the costs of the 2 plans be the same.
asked by Anonymous 
Physics
A gammaray photon produces an electronpositron pair, each with a kinetic energy of 275keV . What was the energy of the photon? E=in MeV What was the wavelength of the photon? wavelength in m Please help thank you!
asked by Sheila 
math
Submit the two equations that represent the cost of going to the gym based on if we join or do not join. Identify the number of times a person would go and have the costs of the 2 plans be the same.
asked by Anonymous 
math
Submit the two equations that represent the cost of going to the gym based on if we join or do not join. Identify the number of times a person would go and have the costs of the 2 plans be the same.
asked by Anonymous 
Life Orientation
5 ways in which the human or environmental problem impact on the environment about HIV/AIDS
asked by Vutlhari 
statistics
The daily sales of a retail store are normally distributed with a standard deviation of $500. If the probability that sales will be less than $10,000 in any one day is 40%, what are the mean daily sales?
asked by Anonymous 
Life Orientation
5 ways in which the human or environmental problem impact on the environment about HIV/AIDS
asked by Vutlhari 
math
write five million two hundred eighty in standard notation
asked by Anonymous 
physics
A uniform rod of mass M = 326 kg is in the shape of a semicircle of radius R = 6 m. Calculate the magnitude of the force on a point of mass m = 74 kg placed at the center of the semicircle, as shown in the figure.
asked by tae 
physics
A satellite is in circular orbit around the Earth at a distance of 4.74RE with a speed of 3.63 km/s. With what speed would the satellite hit the Earth's surface if somehow it suddenly stopped and fell to Earth? Ignore air resistance.
asked by tae 
history
which president raises soft money in order to help democrat candidates in the 1996 election
asked by sarah 
Midpoint Help / Math
M(4,2) is the midpoint of RS. If S has coordinates (2,5), find the coordinates of R.
asked by Andy 
physics
A spy satellite was launched into a circular orbit with a height of 599 km above the surface of the Earth. Determine its orbital speed and period. (The mass of the Earth is 5.97 1024 kg, and the radius of the Earth is 6370 km.)
asked by tae 
algebra
frank can wash the car in 2/3 the time his younger brother,joe,can wash the car.they worked together and washed the car in 40 minutes.how long would it have taken each boy working separately?
asked by loulou 
physics
The distances from the Sun at perihelion and aphelion for Pluto are 4.410 109 km and 7.360 109 km, respectively. What is the ratio of Pluto's orbital speed around the Sun at perihelion to that at aphelion?
asked by tae 
physics
A satellite is placed between the Earth and the Moon, along a straight line that connects their centers of mass. The satellite has an orbital period around the Earth that is the same as that of the Moon, 27.3 days. How far away from the Earth should this
asked by tae 
algebra1
the school bought a new copy machine which makes 20 copies per minute.the old machine makes 12 copies per minute.francine needs 100 copies,so she uses both machines.how long will it take to have the copies
asked by loulou 
life orientation
Describe the life style disease or behavior and explain 5 factors that contribute to cancer
asked by siyanda 
HCS/335
what is the historical and current impact of the biomedical issue?
asked by Brenda 
math
Dirk has two pet mice. Among other things, he feeds them cup of dry pellets every week. How much dry food will he need for a year?
asked by Anonymous 
chemistry
What is the final temperature of 1370 g of water, originally at 20.9°C, if it absorbs 47.6 kJ of heat?
asked by lolo 
math
hermione puts $1000 into an account on january 1, 2008. if the account is compounded continuously at a rate of 7.9%, in what month of what year will the account reach $100,000? Is the correct answer January,2069?
asked by Beth 
maths
the frst term of AP is 4 and the last term is 79.given that the sum of the AP is 996, find the number of terms and the commmon difference.
asked by john 
5th grade math (word problems)
Problem: A receipe for 4 dozen cookies requires 1 1/2 cups of flour. How much flour is needed for 1 dozen? work: 4 divided by 1 1/2 = 4/1 x 3/2 = 4/1 x 2/3 = 8/3 cups of flour Can you explain why i don't need to change 4 dozen to 48 and then divide by 1
asked by Alex 
HCS/335
the future of embryo
asked by Shirley 
Math
Write 70,633.29 two other ways.
asked by Joe 
Life orientation
8 ways in which the flooding impacts within the community
asked by Tshepo 
PLEASE HELP CHEM!!
You work with the following system: 2X(g) Y(g) At, equilibrium, [Y]=3[X]. If K=10, calculate the [Y] at equilibrium.
asked by scilover 
math
what is e = mc square
asked by cualtzin 
Chemistry
What is the ph at the equivalence point for a titration of 250 mL of 0.17M piperidine with 0.17 M nitric acid. (piperidine: Kb = 1.3 x 103)
asked by Chloe 
Math
Tom has a bag filled with 10 green balls, 5 red balls and 5 blue balls, what part on toms bag has green balls
asked by Gio 
Algebra 2
a) The average height of sunflowers in a field is 64 inches with a standard deviation of 3.5 inches. Describe a normal curve for the distribution, including the values on the horizontal axis at one, two, and three standard deviations from the mean. b) If
asked by Kelly 
english
which words should be caoitalized in this sentence st. patricks day is on march 17 every day.
asked by shay 
math
A child’s kite is on top of a straight pine tree. A ladder is placed against the tree and touches the kite. The ladder forms a 45degree angle with the flat ground. The base of the tree is 9 feet away from the base of the ladder. With only this
asked by Anonymous 
physicis
A 8.30 kg object with a speed of 34.0 m/s strikes a steel plate at an angle of 45.0 degrees with the normal to the plate, and rebounds at the same speed and angle on the other side of the normal. What is the change (in magnitude only) of the linear
asked by PCm 
L o
Provide recommendationson how to address the topic of water pollution
asked by Ms Jane 
physicis
A pellet gun fires ten 3.00 g pellets per second with a speed of 840 m/s. The pellets are stopped by a rigid wall. What is the average force (in newtons) exerted by the pellets on the wall?
asked by PCm 
Life orientation
Community organization that are involved in supporting or giving redress homelessness
asked by Shonisani 
math
An alcohol solution consists of 6 gallons of pure water and x gallons of alcohol, x > 0. Let f(x) be the ratio of the volume of alcohol to the total volume of liquid. [Note that f(x) is the concentration of the alcohol in the solution.] (a) Find a possible
asked by emily 
algebra 1
What is b^2b/2
asked by Jen 
LIFE SCIENCE(G12)
state two effects of gibberellin on seed germination
asked by KATLEGO(LEREMI) 
Ife orientation
10 ways in which the environmental health hazard can impact negatively on one's health
asked by Vanterry 
Social Stuides
What were the Wild West myths and realities of Western life?
asked by Anonymous 
government
What is best answer below with regard to the quantity of end items procured with a given procurement appropriation, the Secretary of Defense (1). Can authorize any quantity of items to be procured. (2). Cannot exceed the quantity specified in the defense
asked by CHRISTOPHER 
ScienceGreenhouse Effect
What is the electromagnet spectrum? PLEASE ANSWER ASAP...I REALLY NEED HELP!!
asked by HS 
english Ms. Sue Help Please check my answers
Jaws of the Water ACT TWO At rise we see DAD, TINA, and MARK rushing in and out of the living room. Each enters carrying important items—such as sleeping bags, rain gear, and gallons of water—sets them down, and exits. All three come in together, and
asked by Sumii 
physics
A particle moves through an xyz coordinate system while a force acts on it. When the particle has the position vector vector r = (2.00 m)ihat  (3.00 m)jhat + (2.00 m)khat, the force is vector F = Fxihat + (7.00 N)jhat  (5.30 N)khat and the corresponding
asked by tae 
algebra 1
Solve rational equation 1. 2/b2=b/b^23b+2 + b/2b2
asked by Jan 
Numbers
How many positive integers less than or equal to 1000 are common multiples of the three numbers 8,100, and 40
asked by Tony 
chemistry
How would you figure: How much energy, in kJ, is absorbed by 23.8 g of acetone when it evaporates if its molar heat of vaporization is 32.0 kJ/mol? Acetone formula is C3H6O
asked by Taylor 
math
kate cut a pizza into fourths. karl cut a pizza of the same size into sixth. After they each ate some pizza, they had the same fraction of pizzas left. What fraction of each pizza was left?
asked by tyler 
Physics
Show that 480 W of power is expended by a weightlifter when lifting a 60kg barbell a vertical distance of 1.2 m in a time interval of 1.5 s.
asked by Sabrina 
Trigonometry
If sinx−cosx=1/2 then cot^2 (2x)=a/ b, where a and b are coprime positive integers. What is the value of a+b ?
asked by Tony 
Afrikaans
We will do a oral about intstrunent in Afrikaans,help!!,Icant write in Afrikaans.
asked by Anonymous 
Trigonometry
Given that cos(3x)=acos^x−bcosx is a trigonometric identity, what is the value of a+b ?
asked by Tony 
Eco103
Given The demand function of a product q=f (a)= 360015p find the maximizes total revenue and quanty sold
asked by Chris 
Trigonometry
Given that cos(3x)=acos^3(x)−bcos(x) is a trigonometric identity, what is the value of a+b
asked by Tony 
chemistry
When totally digested by acid and rocessed into a sample of one liter solution volume for spectroscopy, a 3.21 gram sample of alloy yeilded an absorbance of 0.288. Calculate the percent by wieght of iron in the alloy sample
asked by lisa 
Life Orientation
Suggest 5 recommendations on how to address the environmental problems within your community or any other community within South Africa and globally
asked by K.M.G 
Medical Billing and Coding
1. You're an outpatient coder in Dr. Smith's office. When you code procedures, you're probably using _______ codes. A. ICD10CM B. ICD9CM C. HCPCS D. CPT ANSWER 2. You're a coder who's reviewing the record of a 62yearold woman who was admitted to the
asked by Evelyn 
Social Stuides
What were the Wild West myths of the West?
asked by Anonymous 
Math
A rectangular solid has a volume of 40 cubic centimeters. If the dimensions are all reduced to 1/2 their original size, what will be the new volume of the rectangular solid?
asked by Ash 
khesethwane sec school
hw to address air pollution
asked by Surprise 
social studies
information on checks and balances for president, congress, supreme court\ examples for each
asked by hips 
environment
Name 2 institution or community organisation that are involved in surporting or giving redress to the disaster of air pollution and explain how this organisation are involved in providing a safe and healthy invironment
asked by Lutendo 
Chemistry
The question is: What is the molarity of the copper (II) chloride solution your teacher provided? Show calculations. Obtain the true molarity of the copper (II) chloride solution and calculate percent error. I have done this so far trying to answer the
asked by Jillian 
Life orientation
Name 2 institution or community organisation that are involved in surporting or giving redress to the disaster of air pollution and explain how this organisation are involved in providing a safe and healthy invironment
asked by Lutendo 
Physics H
What is the speed of light moving through a medium of index of refraction 2.45?
asked by Destenie 
Math
The sunglasses that Ramon wants to buy are 50 percent off the original price of $85. If he has to pay 6 percent tax, what will the glasses cost?
asked by Anonymous 
algebra 1,urgent
the expression (4x^23x+1)(x^3+2x+7) what is the coefficient of the x term in the simplified expression? what is an equation of a line parallel to the line with equation 2 y=146x a.y=6x+18 b.y=3x9 c.y=6x+3 d.y=3x+8 Solve linear system, which
asked by Sven 
physics
The drawing shows three energy levels of a laser that are involved in the lasing action. These levels are analogous to the levels in the Ne atoms of a HeNe laser. The E2 level is a metastable level, and the E0 level is the ground state. The difference
asked by PLease HELP 
Chemistry 12
Determine the molar solubility of lead(II) iodide, PbI2, in 0.050 mol/L NaI. Ksp of PbI2 = 9.8 x 10^(9)
asked by Zack 
Geo math
Some flowers are being planted in a circular flower bed with a 10foot diameter. If each flower requires 5 square feet of space, about how many flowers can be planted? What formula do I use to solve this?
asked by Chase 
6th grade Math
I need help on the problem below. The instructions say to "factor the expression" and the expression is: .2x^2 + 80x 6000. Thanks
asked by Brandi 
biology
In a natural population of outbreeding plants, the variance of the total number of seeds per plant is 16. From the natural population, 20 plants are taken into the laboratory and developed into separate truebreeding lines by selffertilization—with
asked by John 
Biology
you are studying a singlegene locus with two alleles in a population that is in HardyWeinberg equilibrium. Examination of a large sample of individuals from the population reveals there are six times as many heterozygotes as there are homozygote
asked by John 
ScienceGreenhouse Effect
What actions can people take to help reduce the greenhouse effect? PLEASE ANSWER ASAP!!
asked by HS 
Optics/Physics
Predict the size of the image of Jupiter if photographed at opposition with a lens having a focal length of 9600 mm. (Assume Jupiter is a disk of 1.43 x 10^5 km and is 6.29 x 10^8 km from the Earth.)
asked by Blake 
math
if the ratio is 1 to 6 of books sally chose and the total of books is 80 what is the amount sally chose
asked by rosey 
Calculus
Find the relative extrema of the function f(x) = 1/2 x  sinx on the interval (0, 2 pie) please show me how you got this!!
asked by Gabby 
English
Ms. Sue can i please have your email address I really need your help with my essay
asked by Annie 
Calculus
Find the first and second derivative for f(x) = x^2  9 / X^2 4 please show me how you got the answer for both
asked by Gabby 
fact/opinion
Please check: 1) these mighty animals are close to extinction. [fact] 2) tigers are the biggest members of the cat family. [fact] 3) it is such a shame. [opinion]
asked by Celest 
Social Stuides
What changed the attitudes of Western lawmakers about giving women voting rights?
asked by Anonymous 
Physics
A student of mass m is at a swimming pool. She climbs the steps to the diving board 4.0 m above the water. She jumps off the board, which enables her to rise a further 0.7 m before she begins her descent into the pool. At what speed does she enter the
asked by Moo 
physic tecnology
Two 80n children sit together 3m from the center of a teetertotter and are able to lift 460n that is 1m away from the fulcrum. name the simple machine that is being used inthe problem, calculate the work in,work out mechanical advantage, and the
asked by shkell 
fact/opinion #2
Please check: 1) Kids who like to get muddy should visit Michigan. [opinion] 2) It must be a sloppy mess [opinion] 3) That's a lot of mud [opinion?]
asked by Celest 
Algebra
Input 16 output 2 input 24 output 4 input 40 output 6 input 52 output 8 find y if x is given. X is input
asked by Sylvia 
Algebra
Input 16 output 2 input 24 output 4 input 40 output 6 input 52 output 8 find y if x is given. X is input
asked by Sylvia 
math
find the points of intersection of the following pairs of equations. a. y=x^2 and y=x +2 b. y=x^2 and y=8x^2 c. y=x^2 and x=y^2
asked by sarah 
chemistry FP depression
if I had to choose a solvent for a freezing point depression lab...would I choose Chloroform or Benzophenone? and why?
asked by JENNA 
?
If there's 60 questions on a homework paper and you miss 10 what would your grade be? I forgot how to find out your grade.
asked by Anonymous 
calculus
Let A be the region in the plane consisting of those points (x,y) such that 0≤y≤1−x^2. Rotate A around the xaxis in space. What is the volume of the resulting solid?
asked by lisa 
MATH
1. How would you prepare 950mlof 0.4M Nacl? 2.
asked by DELL 
calculus
A paper cone is to be formed by starting with a disk of radius 9cm, cutting out a circular sector, and gluing the new edges together. The size of the circular sector is chosen to maximize the volume of the resulting cone. How tall is the cone?
asked by lisa 
math
triangle ABC is an isoscles triangle and semicircle, have same base AB and same area. Find the base angles of the triangle.
asked by molly 
government
What exactly is the war going on between the U.S. and Pakistan? Is it because the U.S. though Bin Laden was in Pakistan? Also is that war and the Afghanistan war still going on? From what I researched, they still are.
asked by K 
Economics
b) If you were the head of the Japanese Central Bank, how would you respond if your goal was to keep the interest rates at the original equilibrium level (before the increase in the taxes) in the money market?
asked by Chuck 
science
When 10grams of sodium chloride, NaCL,dissolves in 100grams of water, the freezing point of the water gose down to 5.9C. when 10grams of table sugar C H O, dissolves in 100grams of water, the freezing point only goes down to  0.56C. how do yo0u account
asked by Jessica 
Economics
b) If you were the head of the Japanese Central Bank, how would you respond if your goal was to keep the interest rates at the original equilibrium level (before the increase in the taxes) in the money market?
asked by Chuck 
Economics
b) If you were the head of the Japanese Central Bank, how would you respond if your goal was to keep the interest rates at the original equilibrium level (before the increase in the taxes) in the money market?
asked by Chuck 
CHEMISTRY
Suppose a student adds 25.00 mL of 1.025 M HCl to a 1.50 g antacid tablet. The student boils and then titrates the resulting solution to the endpoint with 0.4969 M NaOH. The titration requires 21.3 mL NaOH to reach the endpoint. How many moles of HCl were
asked by Jo 
Economics
b) If you were the head of the Japanese Central Bank, how would you respond if your goal was to keep the interest rates at the original equilibrium level (before the increase in the taxes) in the money market?
asked by Chuck 
maths
in fig. angle BAD= angle ADC = 90 and AX parallel BC ; the area of abcx
asked by anuj rathou 
Math
System A has a 10% chance of being "down", while system B has a 5% chance of being "down". What is the probability that: 1) Neither computer system will be operational. 2) Both computer systems will be operational. Thanks!
asked by Yvonne 
APUSH
One of the ironies of World War I was that in a war 'to make the world safe for democracy,' the government attacked the civil liberties that make democracy possible. Assess the validity of the statement above.
asked by McKenzie 
algebra1
one number is 8 less than another .the quotient formed by dividing the higher number by the lower number is 15/11.Find the values of the two numbers
asked by loulou 
science
what is the product when barrium chloride react with ammonium dichromate?
asked by Siphelele 
calculus
Consider the region above the graph of y=x^2 and below the graph of y=x+2. What is the area of this region?
asked by lisa 
Chemistry
Consider the titration of 41.2ml of 0.230 M HF with 0.220 M NaOH . Calculate the ph after the addition of 11.9ml of sodium hydroxide.(HF: Ka = 3.50 x 104) Please, I need step by step on on how to solve this type of problem. Thank you very much!
asked by Chloe 
Social Stuides
What role did miners play in the settlement of the West?
asked by Anonymous 
Economics
b) If you were the head of the Japanese Central Bank, how would you respond if your goal was to keep the interest rates at the original equilibrium level (before the increase in the taxes) in the money market?
asked by Chuck 
Physics
liter of biodiesel requires 57 kilograms of coffee grounds, how many pounds of coffee will be needed to fill up a 10 gallon (40 liter) car engine? (1 kilogram = 2.2 pounds
asked by Miley 
Science/DUE TODAY
please help!!! quick!!! How is a polar bear adapted to living in a desert? (behavioural and physical)!!! write something that is a good answer and that i can understand.
asked by Daisy Walker 
Math
On a map John is standing at (11,11). His friend Lucy is standing at (1,11). John took 10 steps to the right. Is he standing with Lucy now?
asked by Kris 
Math
I have 5 tickets for a raffle and I know that the probability of my winning the prize is 0.003. How many tickets were sold altogether?
asked by Zach 
life orientation
Substance abuse of both legal and illegal drugs among the youth
asked by vukosi 
maths
Bibi wants to send invitations to some of her friends to come to her birthday party. She has contact information for 37 friends stored on her phone, but she only wants to invite 21 of those people to her party. She tries to send out a message to the 21
asked by OIan 
math algebra
Paul Websters motorboat can travel 15 mph in still water. Traveling with the current of a river, the boat can travel 20 miles in the same time it takes to go 10 miles againt the current. Find the speed of the current.
asked by alms 
algebra
Abby Tanenbaum paddled her canoe 10 miles upstream, and then paddled back to her starting point. If the rate of the current was 3 mph,and the entire trip took 3.5 hours, what was Abby's rate (in still water)?
asked by Jennifer 
Physics
You are a thief and you want to lower yourself from the rooftop to a second floor window, which is at a distance H=12m below the tip of the roof. You want to use a nylon rope, which has a failure stress of 400 MPa, and a Young’s modulus of 1 GPa. If you
asked by helpless 
Physics
Two converging lenses are separated by 23.60 cm. The focal length of each lens is 12.60 cm. An object is placed 35.80 cm to the left of the lens that is on the left. Determine the final image distance relative to the lens on the right. Answer in cm
asked by Elizabeth 
math
The median score on a test is 90. Is it possible to add two more scores to the data and still have a median score of 90? Explain your answer.
asked by Ryan 
English
Take the subject you explored in Part 1 of Submission 2 and narrow it down so that it can be covered in one paragraph. You might use one of the two techniques below. 1. Use one incident from the Answers column of your chart to illustrate an idea. Example:
asked by Sam 
life orientation
name two institutions/ community organizations that are involved in supporting or givin redress to land pollution. Explaim how these organizations are involved in providing a safe and healthy environment
asked by innocent mosehla 
Science
Is it possible that man may be able to colonize Neptune someday?
asked by Anastasiya 
?
Let me see if I understand how to find your grade now. So this time if there are 60 questions and you miss 15 your grade would be a 72?
asked by Anonymous 
Math
What is 2•2•2•2•1= 4987•6739
asked by Anastasiya 
ScienceGreenhouse Effect
I need to design a NEW model for the atmosphere that covers the shortfallsin the greenhouse model. Any suggestions?
asked by HS 
MATHS!!!
Calvin was making a trip to the University of Chicago. When he drove down, he took Lakeshore Drive, and averaged 35 miles per hour. On his way back, he took the I94 highway, and averaged 50 miles per hour. Given that the return journey was 4 miles longer
asked by OIan 
Algebra
A circular mirror is surrounded by a square metal frame. The radius of the mirror is 5x. The side length of the metal frame is 15x. What is the area of the metal frame? Write your answer in factored form.
asked by Casey 
Algebra
A circular mirror is surrounded by a square metal frame. The radius of the mirror is 5x. The side length of the metal frame is 15x. What is the area of the metal frame? Write your answer in factored form.
asked by Casey 
Math
Let Alpha and Beta be the zeros of the cubic polynomial x^3 + ax^2 + bx + c satisfying the relation Alpha * Beta = 0. Prove that : c^2 + ac + b + 1 = 0. Please work the complete solution.
asked by Watson 
Math
A rectangular livestock pen with THREE SIDES of fencing is to be built against the barn. The fencing is 1050ft long. Find the dimensions of the maximum area that can be enclosed. What is the maximum area?
asked by Tom 
Maths!!!
4 distinct integers p, q, r and s are chosen from the set {1,2,3,…,16,17}. The minimum possible value of (p/q)+(r/s) can be written as a/b, where a and b are positive, coprime integers. What is the value of a+b?
asked by OIan 
Maths
a and b are consecutive, positive integers such that a^2−b^2>22. What is the minimum possible value of a+b?
asked by OIan 
Math
Let p and q be the roots of the polynomial mx^2 + x(2  m) + 3. Let m1 and m2 be two values of m satisfying p/q + q/p = 2/3. Determine numerical value of m1/ (m2)^2 + m2/(m1)^2. Please work the complete solution.
asked by Watson 
MAths
4 distinct integers p, q, r and s are chosen from the set {1,2,3,…,16,17}. The minimum possible value of p/q+r/s can be written as a/b, where a and b are positive, coprime integers. What is the value of a+b?
asked by OIan 
algebra 2
factor 2x^3+54 I factored it to 2(x^3+27). can it be factored more or is that it?
asked by SoccerStar 
Maths
Five red cards numbered 1,2,3,4,5 and two black cards both numbered 5 are randomly ordered facedown into a pile. The cards are flipped over one at a time until either the sum of the numbers on the red cards is at least 10, or the sum of the numbers on the
asked by OIan 
Pre calc
A parabola has its vertex on the graph of the line y=3x+1 and passes through (1,10). If it is the same size,? shape, and direction as the graph of y=3x^2, find the equation (s) of all possible parabolas
asked by Rebekah 
math
ronnie swam 2.5 laps on monday and swam twice as far on tuesday how far did he swim in all?
asked by erica 
MAths
What is the sum of all numbers that occur an odd number of times in rows 0 through 11 of Pascal's triangle? Details and assumptions The 0th row of the Pascal triangle is the vertex, which is 1. You only sum the number once, regardless of the number of
asked by OIan 
Physics :(( help please TT
Ski boots are usually made with releasable bindings. This is done for safety – if you fall and your ski gets caught, the binding between the boot and the ski will release so the ski pops off rather than twisting your knee. Sometimes this leads to the
asked by OIan 
Life orientation
Ways in the human or environmental problem impacts on the community
asked by Nambuso 
Physics :(( help please TT
If you've ever watched sailing, you will sometimes see a sailor hanging off the side of the boat, for example in this shot from the movie "The Thomas Crown Affair." Eventually, of course, the sailboat tips over so far that a person cannot keep it balanced.
asked by OIan 
Physics :(( help please TT
Consider a fivepointed star made of resistors as shown below. Each resistor has resistance R=6 Ω. Find the equivalent resistance in Ohms between the points A and B. Details and assumptions Note: Points ABCDE are labeled for easy reference if you need to
asked by OIan 
Math
Adam left the airport and traveled toward the Capital. Elisa left one hour later traveling 50 mph in an effort to catch up to Adam. After traveling for 4 hours Elisa finally caught up. What was Adam's average speed?
asked by Sam 
math
Simplify: 2x^3y^2+ 4x^2z / 2x^4
asked by Janae 
Mathabatha
Ways in which xenophobia impacts in our communities
asked by Judy 
ScienceGreenhouse Effect
Described the greenhouse effect using the big idea of energy transfer?....PLease answer ASAP
asked by Hanna 
Maths
Sketch the graph of f(x)=x^33x+3
asked by Ayabulela 
Math
If polynomial p(x) = Ax^3 + Bx^2 + Cx + D vanishes at x = a  d, a, a + d, then prove that a^2 + D/aA > 0. Here A, B, C, D are some constant. Please work the complete solution.
asked by Watson 
finance
Smith Technologies is expected to generate $125 million in free cash flow next year, and FCF is expected to grow at a constant rate of 3% per year indefinitely. Smith has no debt or preferred stock, and its WACC is 14%. If Smith has 45 million shares of
asked by nikki 
Math
Suppose you have 36 yards of fencing to build a fence around a rectangular backyard garden. The width is 18 yards less than twice the length. Find the length and width of this garden.
asked by Scarlett 
physics
In the dangerous “sport” of bungeejumping, a daring student jumps from a balloon with a specially designed elastic cord attached to his ankles. The unstretched length of the cord is 25.0 m, the student weighs 700 N, and the balloon is 36.0 m above the
asked by hook miner 
math
order the fractions 1/3 2/5 2/9 1/3 and 4/1 from least to greatest
asked by joey 
Physics
21. The Mariana trench is located in the Pacific Ocean at a depth of about 10300 m below the surface of the water. The density of seawater is 1025 kg/m3. If an underwater vehicle were to explore such a depth, what force would the water exert on the
asked by Alex 
maths
express a^8b^6c^7 whole root 4 in the simplest form??
asked by tuhituhi 
Math Geo
Estimate the radius of a circle with the circumference of 272.2 inches. Help me with the steps please?
asked by Chase 
physics
Kelli weighs 392 N, and she is sitting on on a playground swing that hangs 0.4 m above the ground. Her mom pulls the swing back and releases it when the seat is 1.1 m above the ground. If Kelli moves through the lowest point at 1.5 m/s, how much work was
asked by James 
science
If solid iodine sublimes to produce iodine gas:write down the equation for the reaction
asked by vhahangwele 
Life orientation
Give me 3 institutions or community organizations that are involved in giving redress to floods problems
asked by Cpho 
physics
Kelli weighs 392 N, and she is sitting on on a playground swing that hangs 0.4 m above the ground. Her mom pulls the swing back and releases it when the seat is 1.1 m above the ground. If Kelli moves through the lowest point at 1.5 m/s, how much work was
asked by James 
maths
what is pure surd of 3/4root32?
asked by tuhituhi 
Algebra Math
The function given by f (x) = 9/5 x + 32 converts x degrees Celsius to an equivalent temperature in degrees Fahrenheit. (a) Is f a onetoone function? Why or why not? (b) Find f 1(x) and interpret what it calculates
asked by Tamie 
Science question
A battery is not used in flashlight microwave portable radio cell phone I think microwave?
asked by Mr.Brain 
Math
What are 2 prime numbers between 100199 such that the tens digit is a prime number, the ones digit is a prime number, and the tens and ones digit taken together are 2 digit prime number.
asked by Anonymous 
social studies
With regard to the quantity of end items procured with a given procurement appropriation, the Secretary of Defense: Can authorize any quantity of items to be procured. Cannot exceed the quantity specified in the defense appropriation act. Can acquire as
asked by Shawn 
chemistry
which melts at a low temp in a solid nonelectrolyte what type of solid is it
asked by tony 
math
Let x2 be a factor of f(x)=x^3x^2+ax+b. Find the relationship between a and b
asked by gibbs 
Economics
b) If you were the head of the Japanese Central Bank, how would you respond if your goal was to keep the interest rates at the original equilibrium level (before the increase in the taxes) in the money market?
asked by Chuck 
Chemistry
What is the pH of a solution that is 0.0100 M in HCN and 0.0200 M in NaCN?
asked by ben 
math
a rectangular garden with an area of 2112 square feet is to be located next to a barn with fencing on three sides and the barn acting as the fourth side.Write a function that gives the length of fencing needed if the length of the side parallel to the barn
asked by Anonymous 
To Sweetkay
DO NOT post entire tests or exams here. That promotes cheating. =(
asked by Writeacher 
geometry
Tamika draws a line that would cut a 8. square in half. She says she makes 2 smaller squares. Is Tamika Correct?
asked by Vargas 
books
I need to write a Year 9 English Unit on the novel,"Strange Objects" by Gary Crew. I can't seem to find any resources to assist me. Can you help direct me to finding some???? thanks
asked by jo 
geometry
Blake draws a diagonal to cut a trapezoid. He says he is left with two triangles. Is Blake correct?
asked by Vargas 
chemistry
how many liters are occupied by 0.908 mol of nitrogen at 108 degrees C and 0.858 atm pressure?
asked by courtney 
math
a map has the scale of 1 inch =80 miles.what is the actual distance,in miles,between two towns that are 4 1/2 inches apart on the map?
asked by rasheeda 
social science
A paragraph explaning how the swahili langauge came into being
asked by vukona ngobeni 
us history
What was life like for nurses during the civil war and what incidents happend
asked by Irene 
CalculusSolvedPlease Check?
estimate cube root of 25 by linear approximation f(x+delta(x))= f(x) + (df(x)/x) * deltax 3 + 1/3x^(2/3) * 2 3  2/3x^(2/3) 3  (2/3* ((cube root(9))) is this right? thanks
asked by Liliana 
physics
Three point charges lie in a straight line along the yaxis. A charge of q1 = 9.20 µC is at y = 6.60 m, and a charge of q2 = 8.00 µC is at y = 3.90 m. The net electric force on the third point charge is zero. Where is this charge located?
asked by wendlen 
French
How do you unscramble o'ceisoubellreld.
asked by paige