Questions Asked on
April 2, 2013

math
1) An antique dresser was purchased for $7500 in 2005. The dresser increases in value by 9% per year. Find the value of the dresser in 2025. 2) a) Find the slope of the secant to the curve f(x) = 0.25(4)^(x)  2 between: p1) x=0 and x = 1 p2) x=0 and x=0.5
asked by Jonathan 
math
Inflation is currently causing the cost of items to increase by about 2.5% per year. In 2009 a litre of gasoline costs approximately $0.90. What will it cost to fill a 60 litre gas tank 10 years from now. Round your answer to the nearest dollar. Name at
asked by Daniel 
physical science 2nd semester
what is the reactant in this equation ?2HBr(aq)+ca(OH)2(aq)>2H2O(i)+CaBr2(aq)
asked by josh 
Math
Jeremy and Cynthia leave at the same time to travel 75 miles to an area. Jeremy drives 15 miles in 12 minutes. Cynthia drives 26 minutes in 20 minutes. If they continue at the same rates, who will arrive at the area first?
asked by Alyssa 
stats
Given a standard normal variable. What is the probability that z lies between 1.48 and 2.13
asked by chris 
stats.
The amount that airlines spend on food per passenger is normally distributed with mean $8.00 and standard deviation $2.00. What is the probability that a randomly selected airline spends more than $12.50.
asked by chris 
stats.
The mean number of bumped airline passengers per day s 1.35 and the standard deviation is 0.25. For a random selection of a group of 40 days, what is the probability that the mean number of bumped passengers for the 40 days will be between 1.25 and 1.50?
asked by chris 
physics
define waves
asked by alax 
physic
what is a wave?
asked by alax 
health
what can a person do to foster a positive self image?
asked by Anonymous 
physic
Three 30mm diameter cables support the car in a cable elevator. Inside the car is a safety notice. SAFE WORKING LOAD 33 PERSONS 2244 KG The yield stress of the cables is 200MPa. What factor of safety has been applied at the safe working load? Factor of
asked by alax 
math
Flight Path. In this problem you will use a cosine function to model the flight path of a plane that begins its descent from 20000 ft when it is 45 miles from the airport. Find the fuction p(x)= ACos(wx)+B that that gives the altitude in ft when the plane
asked by TMan 
Spanish 2
Conjugate Past Tense Resulta que todo el mundo _____ que mi novio me estaba enganando porque el ____ con otra chica y los dos estaban bailando juntos y besandose toda la noche. Choices: decir, tener, querer, poner, saber, poder, and venir I tried different
asked by Jayda 
Math/ Calculus Please HELP!!!
An object at rest begins moving horizontally on the xaxis, starting at position x(t) = 0 feet at time t = 0 seconds.Suppose, after exactly 2 seconds we measure the position of the object to be 3 feet to the right of the origin AND measure the object to be
asked by Marto 
Chem
Predict the values of m/z and the most abudent fragments you would observe in the mass spectrum of dinpropyl ether?
asked by Anonymous 
Chem
Predict the values of m/z and the most abudent fragments you would observe in the mass spectrum of dinpropyl ether?
asked by Anonymous 
7th Grade Language Arts URRGEENT!!!!
What was the first South American nation to receive independence? (1 point) Chile Argentina Paraguay Brazil ok this question IDK... however I think it's Chile OR Argentina though to be honest idk I've read the book 17 times (i counted) I looked it up in
asked by Gabby 
Physiology
How does nervous system control the activity of writing
asked by Jumoke 
MAths algebra
A rectangular plot measures 16 meters by 34 meters ,find the distance from one corner of plot to the corner diagnolly opposite Answer is 38 meters
asked by Firdous 
MAths algebra
Consecutive bases of a square shaped baseball diamond are 90 feet apart .Find to the nearest tength of a foot the distance from first base diagonally across the diamond to third base
asked by Firdous 
MAths algebra
A diagonal of a square parking lot is 75 meters.Find to the nearest meter, the length of a side of a lot
asked by Firdous 
maths algebra
Suppose that there is a cube with edges 12 centimeters in length.Find the length of a diagonal from a lower corner to the diagonally opposite upper corner .
asked by Firdous 
MAths algebra
Suppose that there is a rectengular box with a length of 8 centimeters a width of 6 centimeters and a height of 4 centimeters.Find the length of a diagonal from a lower corner to the upper corner diagonally opposite. Answer is 10.8 centimeters
asked by Firdous 
algebra!!!!
The population in a town called Atown in December 1900 is a perfect square. In January 1901, 48 people moved in, and the population is 1 more than a perfect square. In February 1901, 48 more people moved in, and the population is a perfect square. Assuming
asked by please help me out!! 
GEOMETRY(POLYGON)
A regular polygon has interior angles of 150∘. A,B,C,D are 4 consecutive points of this polygon. What is the measure (in degrees) of ∠ADC?
asked by please help me out!! 
GEOmetry(Special Coin Placement)
Three coins are randomly placed into different positions on a 4×10 grid. The probability that no two coins are in the same row or column can be expressed as a/b where a and b are coprime positive integers. What is the sum of a+b?
asked by please help me out!! 
physics
I am helping my friend move into his new apartment. During the move, we have to load boxes into the back of his truck. To make it easier to load them, we've set up a metal ramp so that we can slide the boxes up to the deck of the truck. The box shown in
asked by Dan 
PROBAbility!!!!
A bag contains 150 balls numbered 1 through 150. Three balls are drawn and placed on the table. The probability that the balls were drawn in increasing order can be expressed as a/b where a and b are coprime positive integers. What is the value of a+b?
asked by please help me out!! 
simple PHYISCS
A teenager accidentally falls off a 10 m high platform diving board. His friend whips out his camera and takes a picture when the teenager is halfway to the water below to commemorate the embarrassing event and post it on Facebook. How many seconds after
asked by Anyone....out...help..please!!! 
PHYSIcs!!!
You want to figure out how fast you can throw a ball, but don't have access to a radar gun. You measure the height from the ground to your hand as you throw and discover that when you throw a ball it leaves your hand at a height of 2 m from the ground. You
asked by Anyone....out...help..please!!! 
physics...
A kayaker paddles due north at 2 m/s. The river the kayaker is paddling in flows towards the east at 1 m/s. After 5 seconds of paddling, how far is the kayaker from where she started in m?
asked by HELP ME...uRGENT! 
physics
You and your friend, both of mass 70 kg, are playing catch with a frisbee on frictionless ice. Initially, you are both at rest. You throw a 0.175 kg frisbee at 10 m/s horizontally at your friend, who catches it. After they catch the frisbee, what is the
asked by HELP ME...uRGENT! 
physics
block 1 has mass m1 = 480 g, block 2 has mass m2 = 540 g, and the pulley is on a frictionless horizontal axle and has radius R = 5.2 cm. When released from rest, block 2 falls 76 cm in 5.2 s (without the cord slipping on the pulley). What is the pulley's
asked by Ashley 
Math
If y = sin−1 x, then sin y = x,−π/2 ≤ y ≤ π/2. Therefore, to find y = sin−1(−3/22, we must find an angle y whose sine is 3/2. There are many possible angles with this sine, but the range of y = sin−1 x is restricted to [ , ] and so y must
asked by HELP!!!! 
biology
) To test linkage between the feather texture and feather color genes you complete a test cross with the F1, and find that the feather texture and feather color genes are linked. Only part of the data from the test cross is given below. Complete the table
asked by john 
DPS
An isotope has a 12.4 hour half life. If it has an activity of 30mCi at noon today, what was its activity at 3 p.m. yesterday?
asked by Gajender Goswami 
machanics
A space aircraft is launched straight up.The aircraft motor provides a constant acceleration for 10 seconds,then the motor stops.The aircraft's altitude 15 seconds after launch is 2 km.ignore air friction .what is the acceleration,maximum speed reached in
asked by shone 
chemistry
Rank these elements according to electron affinity. Br, S, Ne most energy released by gaining an electron: most energy absorbed by gaining an electron:
asked by anonymous 
Chemistry
The sizes and shapes of the hydrogen atom orbitals was revealed through graphical analysis of the corresponding wave functions. These wave functions also predict areas that the electrons have a zero probability of being found. These areas are known as
asked by anonymous 
Chemistry
What would be the speed of the following particles if they had the same wavelength as a photon of green light (λ = 500.0 nm)? Proton (mass = 1.673*10^(24)g) =_____ neutron (mass = 1.675*10(24)g) =_____ electron (mass = 9.109*10^(28)g) =_____ alpha
asked by Anonymous 
chemistry
Suppose you take a trip to a distant universe and find that the periodic table there is derived from an arrangement of quantum numbers different from the one on Earth. The rules in that universe are: 1. principal quantum number n = 1, 2, . . . (as on
asked by Anonymous 
Chemistry
To resolve an object in an electron microscope, the wavelength of the electrons must be close to the diameter of the object. What kinetic energy must the electrons have in order to resolve a protein molecule that is 2.10 nm in diameter? Take the mass of an
asked by Anonymous 
chemistry
The first ionization energy of a carbon atom is 1.81 aJ. What is the frequency and wavelength, in nanometers, of photons capable of just ionizing carbon atoms? v=______s^(1) lambda =_____nm Assuming an ionization efficiency of 47.0%, how many such photons
asked by Anonymous 
chemistry
The first ionization energy of a carbon atom is 1.81 aJ. What is the frequency and wavelength, in nanometers, of photons capable of just ionizing carbon atoms? v=______s^(1) lambda =_____nm Assuming an ionization efficiency of 47.0%, how many such photons
asked by Anonymous 
chemistry
Would the following procedural errors result in an incorrectly high or low calculated percent NaOCl in commercial bleach solution? A student failed to allow the volumetric pipet to drain completely when transferring the diluted bleaching solution to the
asked by Brooke 
Please solve it.Logarithm
Please help me because I do not any idea in Logarithm topic.Solve for the value of X: 6log(x^2+1)=5
asked by Seth 
advance functions gr 12
use the asymptotes and intercepts to make a quick sketch of the function f(x)= x2 (numerator) x+4(denominator) and its reciprocal f^r = x+4 (numerator) x2 (denominator) on the same set of axes. b) describe the symmetry in the graphs in part a) c)
asked by james 
advance functions gr 12
Using rational functions solve 7+ 1(numerator) x (denominator) = 1 (numerator) x2(demominator)
asked by james 
physics
Find modulus,Direction cosines,Unit vectors of (1)4a2b+c,(2)a7b+5c,(3)4a3b+c.
asked by Samson 
physics
Find modulus,Direction cosines,Unit vectors of (1)4a2b+c,(2)a7b+5c,(3)4a3b+c.
asked by Samson 
Physics
Mars has a mass of about 6.09x10^23 kg and it's moon Phobos has a mass of about 9.4 x10^15N how far apart are mars and Phobos? The value of the grav constant is 6.673 x10^11 answer in units of N
asked by Lexi 
math
Which of the following could NOT represent the intersection of a plane and a triangular prism? A. a triangular prism B.a triangle C. a rectangle D. a point I had D, a point because if you cut a triangle in half you can not get a point out of it. If this is
asked by B6 
Physics
A helium4 atom falls from a height h into a tank of gaseous helium atoms at 300 K. What is h in meters if the temperature of the helium atoms remains at 300 K after the falling atom enters the tank? Details and assumptions The acceleration of gravity is
asked by Crow 
Physics
A plane flies horizontally at constant ground speed v=720km/h. The pilot is informed by an air traffic controller that he must immediately change his direction of flight while keeping the same altitude. The pilot performs a turning maneuver by rolling the
asked by Crow 
Math
Let f(x)=x2−1. How many distinct real roots are there to f(f(f(x)))=0?
asked by Crow 
physics
A space aircraft is launched straight up. The aircraft motor provides a constant acceleration for 10seconds, then the motor stops. The aircraft's altitude 15seconds after launch is 2km. Ignore air friction. Determine (i) the acceleration, (ii)the maximum
asked by Kemmone 
science "Genetics" Mendel
You are studying genetics in domestic chickens (Gallus gallus) and you find a mutant with no wings. Assume that the mutant wingless phenotype is due to a mutation at a single gene. In contrast to mammals, chickens use ZZ/ZW sexlinkage. That is, male
asked by grad2013 
World Geography
In any particular culture, an idea or way of doing things that is common to the culture is called a ____________. A. cultural landscape B. culture C. cultural trait D. cultural norm
asked by abreanna 
physics111
a river flows due south with a speed of 2.0m/s. a man steers a motorboat across the river;his velosity is 4.2m/s due east.the river is 800m wide. (A) what is his velocity(magnitude and direction)relative to the earth? (B)how much time is required to cross
asked by yonela 
Biology "Genetics"
Redgreen Color Blindness and Hemophilia A are both sexlinked traits in humans. Both genes are on the Xchromosome and are tightly linked. Consider the pedigree below. Individual 1 is homozygous normal. Individual 2 is both redgreen color blind and a
asked by grad2013 
math
y1=6+2x x1 y1 3 ? 2 ? 1 ?
asked by lily 
information Literacy
in the subject guide search on edseek's homepage enter the following subject term: paleobotany. Based on the results from this search, choose the best answer to this question
asked by Anonymous 
Math algebraic factprization
1) (x+3)^2  (x+1)^2 2) (x4)^2  16(x+2)^2
asked by Jim 
Math
Algebraic factorization 1) (x+3)^2  (x+1)^2 2) (x4)^216(x+2)^2 3) 4(x+1)^2 (2x)^2
asked by Jim 
English
The sure solution to unemployement is a better quality of education
asked by Valencia 
math
HOW YOU CAN PREPAIR 1M OF SODIUM CHROLIDE IN 250CMCUBE
asked by carina 
MATH
Below are some sale prices for soda .Which offers the best price ? a. 6 for $1.75 b.8 for $1.90 c.12 for $3.15 d.30 for $7.50
asked by CARINA 
Math
if kelly gave 1/3 of a pizza to holly and 1/5 to diane how much did she have left
asked by Kelly 
Chemistry
At the normal boiling point of toluene,Δ Hvap=33.2 kJ/mol and ΔSvap= 86.5J/mol•K. What is the normal boiling point of toluene?
asked by Viv 
Math
A newly designed international airport is planning to label its gates. Each gate must be assigned a letter from the alphabet from A to M (13 in all), and a number from 1 to 15. To avoid confusion, any two gates must be assigned a different letter, or a
asked by Hale 
pre calculus
1.)A utility company has the following rate schedule for natural gas usage in a city’s business district: Monthly service charge: $8.80 Per therm service charge 1st 25 therms : $0.6686/therm Over 25 therms: $0.85870/therm (a) What is the charge for using
asked by alexis 
pre calculus
2. Graph the following function using transformations. Be sure to graph all of the stages on one graph. State the domain and range. y= 2 lxl +2 For example, if you were asked to graph y= x^2 + 1 using transformations, you would show the graph of y= x^2
asked by michelle 
math
A carpenter is building rectangular walls for a room addition. The width of a section of wall is two times the height h. Each section has a brace that connects two opposite corners of the section. What is a simplified expression for the length of a brace?
asked by Jane 
Physics
A player kicks a soccer ball from ground level and sends it flying at an angle of 30 degrees at a speed of 26 m/s. How far did the ball travel before it hit the ground? Round the answer to the nearest meter.
asked by Anonymous 
math
A walking path is shaped like a rectangle with a width 7 times its length "l". What is a simplified expression for the distance between opposite corners of the walking path?
asked by Jane 
Math
A newly designed international airport is planning to label its gates. Each gate must be assigned a letter from the alphabet from A to M (13 in all), and a number from 1 to 15. To avoid confusion, any two gates must be assigned a different letter, or a
asked by Mark 
advance functions gr12
use the asymptotes and intercepts to make a quick sketch of the function f(x)= x2 (numerator) x+4(denominator) and its reciprocal f^r = x+4 (numerator) x2 (denominator) on the same set of axes. b) describe the symmetry in the graphs in part a) c)
asked by james 
advance functions gr12
Using rational functions solve (7+ 1)/x = 1/(x2)
asked by james 
Physics
Find the frequency of a sound wave moving in air at room temperature (20.0) with a wavelength of 0.667 m. Is the formula F=1/T?
asked by Denise 
advance functions gr12 HELP ASAP
using rational functions solve (x+5)/(x3)= (2x+7)/(x) thank you
asked by ALEX 
Chem
a gas has a volume of 410 mL at 27 degrees c and 740 mm Hg. what volume would this gas occupy at STP?
asked by Anonymous 
Chem
a gas has a volume of 410 mL at 27 degrees c and 740 mm Hg. what volume would this gas occupy at STP?
asked by Anonymous 
algebra
Can anyone help explain how to work this problem out? One factor in flood safety along a levee is the area that will absorb water should the levee break. the coordinates that make up the boundry area are (0,0),(2.8,2.1)and(4.3,4.4) what is the area of the
asked by lee 
Physics
The coil in the figure below contains 425 turns and has an area per turn of 3.00 103 m2. The magnetic field is 0.21 T, and the current in the coil is 0.27 A. A brake shoe is pressed perpendicularly against the shaft to keep the coil from turning. The
asked by Anonymous 
Math
A state lottery requires you to choose 4 cards from an ordinary deck: I heart, 1 club, 1 diamond, and 1 spade in that order from the 13 cards in each suit. If all four choices are selected by the lottery, yo win $5,000. It costs $1 to play. Find the
asked by Devin 
advance functions gr12 (SORRY LAST ONE HAD A TYPO)
Using rational functions solve 7+ (1)/x = 1/(x2)
asked by james 
math
how much is 12 quarters?
asked by me 
algebra
For problems 13 and 14, assign each letter and a blank space to a number as shown by the alphabet table below. Use the code [1,2_3,7] encode the phrase "ONE QUESTION TO GO" The matrix C=[1,2_3,7] was used to encode a phrase to
asked by lee 
math
A gardener is mowing a 20 yardby40 yd rectangular pasture using a diagonal pattern. He mows from one corner of the pasture to the corner diagonally opposite. What is the length of this pass with the mower? Give your answer in simplified form. Please
asked by Jane 
Chemistry
The enthalpy of vaporization of chloroform (CHCl3) is 29.2 kJ mol1 at its normal boiling point 61.2 Celsius. what is the standard change in entropy for vaporization of chloroform at its normal boiling point? Answer I got was 29.2/334.2 = 0.0873.
asked by Viv 
college algebra
How much paper would you need to wrap a box 10cm wide, 25cm high, and 50cm long?
asked by tom 
7th Grade Language Arts~!!!
What was the first South American nation to receive independence? (1 point) Chile Argentina Paraguay Brazil My Answer: 1) Argentina Is this correct?
asked by Gabby 
maths
A group of 5 people are going to meet weekly at the library for 4 weeks. Each week, two people are selected at random to speak. Each person may speak in multiple weeks, but no pair of people will speak together more than once. The probability that there is
asked by stranger 
math
2y(4y2) simplify help
asked by Boobear 
geometry
a point F is at a certain distance from a line AB .Another point P is moving in a plane such that the ratio of it's distance from F and line AB remains constant .find the locus of the point P
asked by mani 
college algebra
f(x)=√x2 Find the domain of the function is it x2 the range of function is it (00,2) the domain of the inverse is it x>2 The range of the inverse is it (2,00) Thanks
asked by Anonymous 
advance functions gr12 HELP ASAP
Using rational functions solve 7+ (1)/x = 1/(x2) thank you
asked by james 
advance functions gr12 HELP ASAP
use the asymptotes and intercepts to make a quick sketch of the function f(x)= x2 (numerator) x+4(denominator) and its reciprocal f^r = x+4 (numerator) x2 (denominator) on the same set of axes. b) describe the symmetry in the graphs in part a) c)
asked by james 
Algebra
Find the range of the function rule y = 5x  2 for the domain D = {5, 1, 0 2, 10}
asked by Anonymous 
Physics
What is the wavelength of a 512 Hz sound wave in 20 degree C air?
asked by Kari 
geography
Check my answers, please? I put an asterisk next to which ever ones are my answer. Thanks! Why do you think the Inuit have retained aspects of their early culture? *A.because they are used to that lifestyle B.because such adaptations allow them to survive
asked by anon 
Physics
Joe stands 150 m from the edge of a canyon wall. How long will it take him to hear his echo if the air temperature is 250 degree C?
asked by Stephanie 
advance functions gr12
write an equation for a rational function whose graph has all of the indicated features: vertical asymptote with equation x=3 horizontal asymptote with equation y=2 hole at x=1 no x intercept thank you
asked by sam 
Physics
Jill screams and hears her echo 4.4 seconds later. How far from the canyon wall is she if the air temperature is 25 degree C?
asked by Stephanie 
Physics
One way to determine the distance to the moon is to bounce a laser beam off a mirror on its surface. How far away is the moon if it takes 2.56 seconds for the laser to "echo" off the moon?
asked by Denise 
7th Grade Social Studies
1. Which of the following are accomplishments of the Incas? (1 point) pyramids floating gardens hieroglyphics roads and aqueducts 2. All of the following contributed to the Spanish victory over the Aztecs except (1 point) disease wiped out many of the
asked by Anonymous 
chemistry
Write the complete structures (don’t forget the lonepairs) for the following compounds: C2H5OH; HOCH2CH2NH2; HOCH2CH2NH2; CH3NH2; CH2Cl2
asked by nicole 
Calculus
The altitude (in feet) attained by a model rocket t seconds into flight is given by the function h(t) = 1/3t^3 + 4t^2 + 20t + 2,for t _> 2 a)Find the maximum altitude attained by the rocket. b)Why does it not make sense to use this function after t = 16
asked by Deeno 
Alg 1
Simplifying Radicals A gardener is mowing a 20ydby40 yd rectangular pasture using a diagonal pattern. He mows from one corner of the pasture to the cxorner diagonally opposite. What is the length of this pass with the mower? Give your answer in
asked by Jane 
physics
A rocket ship at rest in space gives a short blast of its engine, firing 26 kg of exhaust gas out the back end with an average velocity of 182 m/s. What is the change in momentum of the rocket during this blast?
asked by Marty 
Calculus
If a company’s sales (in millions of dollars) for time t months is given by f(t) = 0.003t^3 + 0.5t^2 + 2t + 3 a. Find f'(t). b. Find f'(5). c. What does this tell you about the company’s position in the month of May (i.e.,t = 5)?
asked by Deeno 
math
If line 1 passes through (2, 6) and (2, 2) and line 2 passes through (3, 2) and (2, 12), where will line 1 and line 2 intersect? a)(4,0) b)(2,3) c)(6,2) d) (2,2)
asked by lily 
math
Look at the revenue for videos rented (v) on a given day at two different video rental stores below r = 2v + 10 r = 1.6v + 18 After how many video rentals will the revenues of both stores be equal? a)25 b)45 c)70 d)20
asked by joe 
Maths
How many ordered sets of positive integer triples (a,b,c) are there such that a+b*c=100
asked by Mary 
Math
David and Joseph have a total of 328 marbles. Matthew and David have 176 marbles. Joseph has 5 times as many marbles as Matthew. How many marbles does Davis have?
asked by Janet 
math
if i had 7 bags of sand that were 2/3 full and i had 14 pounds of sand how much would it take to fill each one?
asked by Anonymous 
Biology
I'm doing a lab for gel electrophoresis and we added the digests in the wells of the agarose gel Lane 2 – λ Hind III (a standard) Lane 4 – Tube 1 Lane 5 – Tube 2 Lane 6 – Tube 3 Lane 7 – Tube 4 Now will DNA in tube 1 which only has dh20, 10x
asked by Michelle 
Maths
The vertices of a cube are labeled with the numbers 0,1,2,3,4,5,6 and 7, such that no two vertices are labeled with the same number. The sum of any 2 numbers on an edge is prime. What is the maximum sum of the 4 numbers on a face?
asked by Mary 
Physics
Two lenses are in contact. One of the lenses has a focal length of +10.0cm when used alone. When the two are in combination, an object 20cm away from the lenses forms a real image 40cm away from the lenses. What is the focal length? I am not sure how to
asked by Jul 
Physics
Jill screams and hears her echo 4.4 seconds later. How far from the canyon wall is she if the air temperature is 25 degree C?
asked by Cindy 
Maths
Suppose Z=a+bi , where a and b are integers and i is the imaginary unit. We are given that 1+iZ = 1iZ and Z(13+15i)
asked by Mary 
Physics
What is the wavelength of a 512 Hz sound wave in 20 degree C air?
asked by Mary 
Physics
What is the frequency of a wave that has a period of 5.0 seconds?
asked by Denise 
Applied Calculus
For its beef stew, Betty Moore Company uses aluminum containers that have the form of right circular cylinders. Find the radius and height of a container if it has a capacity of 29 in.3 and is constructed using the least amount of metal. (Round your
asked by Jacob 
Armwood
Abby’s bus left at 2:00, going southbound at 55 mph. Bob’s went northbound starting at 3:00, going only 45 mph. How long will it take for them to get 420 miles apart? Round to the nearest tenth if necessary
asked by Anonymous 
math
Flight Path. In this problem you will use a cosine function to model the flight path of a plane that begins its descent from 20000 ft when it is 45 miles from the airport. Find the fuction p(x)= ACos(wx)+B that that gives the altitude in ft when the plane
asked by tom 
Chemistry
At a certain temperature, the equilibrium constant for the following chemical equation is 2.00. At this temperature, calculate the number of moles of NO2(g) that must be added to 2.64 mol of SO2(g) in order to form 1.10 mol of SO3(g) at equilibrium. SO2(g)
asked by Dee 
math
find the exact value of [sec(30 degrees) cot 120 degrees]/1cosec^2(45 degrees) Find the exact value of [sin^2(355 degrees) + cos^2 (355 degrees)]/ tan^2 (30 degrees)
asked by lindsay 
Chemistry
Phosphorus pentachloride decomposes according to the chemical equation PCl5(g) ⇌ PCl3(g) + Cl2(g) A 0.304 mol sample of PCl5(g) is injected into an empty 4.75 L reaction vessel held at 250 °C. Calculate the concentrations of PCl5(g) and PCl3(g) at
asked by Dee 
Chemistry
At a certain temperature, the Kp for the decomposition of H2S is 0.755 H2S (g) H2 (g) + S (g) Initially, only H2S is present at a pressue of 0.201 atm in a closed container. what is the total pressure in the container at equilibrium?
asked by Dee 
Chemistry
If a 4.30 M sample of A is heated to 500 K, what is the concentration of B at equilibrium? A(aq) >
asked by Dee 
Chemistry
At equilibrium, the concentrations in this system were found to be [N2]=[O2]=0.100 M and [NO]=0.500 M. The balanced chemical equation is N2+O22NO. If more NO is added, bringing its concentration to 0.800 M, what will the final concentration of NO be after
asked by Dee 
mathsstatistics
The median of the following incomplete frequency distribution is 10: x= 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 f= 0 , 2 , 5 , 6, 3 , 1 , 2 , Y Calculate the frequency of 8
asked by anoynomous 
life orientation
Human and environmental factors that causes illhealth,sickness,trauma,accidents,crises and disaster
asked by khanyisile 
science
Calculate the de Broglie wavelength of a 0.44 kg ball moving with a constant velocity of 26 m/s (about 60 mi/h).
asked by annie 
Physics
An iron railroad track 1000 feet long is at a temperature of 0 oC. How much does it expand when heated to 33 oC?
asked by Marie 
math
A rectangular room has an area of 120ft squared. Marge drew a scale drawing of the pool using the scale 1.5cm=2ft. What was the area of the scale drawing? a) 213.3cm2 b) 67.5cm2 c)53.3cm2 d)1.5cm2 I don't think any of the choices match the answer (90cm2)?
asked by pitigoiu 
MAth
14% of students say they love school. If 8 students are chosen at random, what is the probability that at least one of them loves school?
asked by Anonymous 
MAth
14% of students say they love school. If 8 students are chosen at random, what is the probability that at least one of them loves school?
asked by Anonymous 
Chemistry
Calculate the mass of 0.0122 moles of: a) Si3N4 b) (CH3)3 N
asked by Madison 
calculus
An airplane is flying at a velocity of 300km/h S30degrees W in a wind blowing at a velocity of 50km/h S20degrees E. What is the true speed and direction of plane?
asked by Nasi 
SCIENCE/ECOLOGY
I NEED HELP IN PREPARING A DEMOPRAPHIC AND ENVIRONMENTAL TIMELINE WHICH INCLUDES DEATH RATES, BIRTH RATES, POPULATION CHANGES, AND MAJOR HISTORY CHANGES
asked by EVELYN 
mathsstatistics
If the mean of y1 and y2 is M1 and that of y1, y2, y3, y4 is M2, the mean of ay1, ay1.y3/a, y4/a is
asked by anoynomous 
life Orientation
ways in which you critically discuss how life style/behaviour diseases impact on the teenage
asked by ronewa 
agriculture
outline and explain the objectives of fencing a farmland
asked by lucas 
geometry
n the xy plane, the graph of y = x^2 and the circle with center (0,1) and radius 3 have how many points of intersection?
asked by naomie 
agriculture
what are the important features of a building which could be used as a milking shed(parlour),dairy(milk room) and food store to ensure production of clean fresh milk?
asked by lucas 
physics
A 75.0 kN truck is parked in the middle of a 20.0 m long bridge. How much force must each end of the bridge exert to support the truck?
asked by name 
agriculture
state and explain what records should be kept for the efficient management of a dairy herd
asked by lucas 
mathsurgently needed
If the mean of y1 and y2 is M1 and that of y1, y2, y3, y4 is M2, the mean of ay1, ay1.y3/a, y4/a is
asked by anoynomous 
Math 7
What type of angle is angle x is clock is used to display the time of 7:15. Each minute represents 6 degrees A. Obtuse B. Acute C. Straight D. Right
asked by Connie 
agriculture
explain how any three of the records which are kept for the efficient management of a dairy herd be used to improve management
asked by lucas 
Genetics part b only
You are studying genetics in domestic chickens (Gallus gallus) and you find a mutant with no wings. Assume that the mutant wingless phenotype is due to a mutation at a single gene. In contrast to mammals, chickens use ZZ/ZW sexlinkage. That is, male
asked by grad2013 
physics
A uniform, 264N rod that is 2.05 m long carries a 225N weight at its right end and an unknown weight W toward the left end. When W is placed 47.9 cm from the left end of the rod, the system just balances horizontally when the fulcrum is located 82.7 cm
asked by Matt 
English
Can someone check these sentences I need to prepare for tomorrow? Thank you. 1) Troy has been at the BRIT School since he was 14. Before that he was in a normal secondary school. 2) Unlike in a normal secondary school, students at the BRIT study all the
asked by John 
agriculture
name one intensive and one extensive system of poultry farming
asked by lucas 
Chemistry
A student dissolved the KHP in 100.0mL of water instead of 50.0mL. Will the molar concentration of the NaOH solution determined from titrating be greater, less than, or unaffected by this mistake? Explain.
asked by Lola 
8th Math  Probability
A basket contains 5 green lollipops, 12 red lollipops, and 7 orange lollipops. When a lollipop is taken from the basket, it is not replaced. What is P(orange, then orange)? I know the answer. It's 42/552. But HOW do I figure this out? I can do the first
asked by L0velyLayna 
chemistry
how does the solubility of gases in water compare to the solubility of solids in water as the temperature of the solution increases?
asked by maggie 
Chemistry
Can the reaction 2Ni(s)+MgSo4(aq) occur.Explain why?
asked by Anonymous 
Statistics
Two cards are drawn from an ordinary deck of cards, and the first is not replaced before the second is drawn. What is the probability that one card is an ace and the other is a king
asked by Michelle 
Alg 1
An area rug is shaped like a golden rectangle. Its length is 8 ft. What is the rug's width? Write your answer in simplified radical form and rounded to the nearest tenth of a foot. Please explain how to work this. Thanks.
asked by Jane 
Chemistry
Of the 3 types of fat, which type of fat would react with the greatest amount of bromine? Least amount of bromine? a. saturated fat b. monounsaturated fat c. polyunsaturated fat
asked by Ashley 
Math
What is 120.06 / 24? We started a new unit, dividing decimals and I find it hard to understand.
asked by Anonymous 
Math
A computer technician keeps track of his earnings throughout each month. the technician observes that his earnings are a linear function of the number of hours he works during the month. The technician finds that when he works 55 hours during the month, he
asked by Jayson Angole 
math
Consider the pair of linear equations below. 4x+6y=12 2x+3y=6 Part A: What is the relationship, if any, between 12 and 6? Part B: Do the two equations have one solution, no solution, or infinitely many solution? Explain. Part C: How can you verify your
asked by Jayson Angole 
Science
Abiotic means non living Biotic means living The following list is to enter into a Venn Diagram where the circles are labeled Abiotic and biotic whale is biotic clock is abiotic water is abiotic fish is biotic paper is both glass is abiotic aluminum is
asked by Jerald 
Finite
The quantity demanded each month of Russo Espresso Makers is 250 when the unit price is $136. The quantity demanded each month is 1000 when the unit price is $106. The suppliers will market 750 espresso makers when the unit price is $72 or higher. At a
asked by rich 
math
which shape will create tessellation using only translations? A. scalene triangle B. regular hexagon C. equilateral triangle D. isosceles trapezoid
asked by andrea 
math
A lab needs a 20 liters of a 15% acid solution. The lab only has a 10% acid solution and a 30% acid solution. How much of the 10% acid solution will they need to mix with the 30% solution to obtain 20 liters of a 15% solution?
asked by Anonymous 
math
A box contains 4 red pencils, 3 blue pencils, and 3 yellow pencils. What is the probability that a student randomly selects a blue pencil, keeps it, then a second student randomly selects a yellow pencil? A. 1/10 B. 3/10 C. 6/10 D. 9/10
asked by andrea 
math
Which statement is true? A. All vertical lines have a slope of zero. B. All vertical lines have a slope positive slope. C. All vertical lines have a negative slope. D. All vertical lines have a undefined slope. WHY?
asked by andrea 
chemistry
the equilibrium constant for the synthesis of HBr(g0 from hydrogen and bromine gas is 2.18*10 exponent 6 at 730 degrees celcius.if 3.75 mol of HBr(g) is put into a 15L reaction vessel,calculate the concentration of H2,Br2 and HBr at equilibrium
asked by tracy 
Earth science
Waste produced by people along the East Coast of the United States has been dumped into the Atlantic Ocean where it is distributed by surface ocean currents. Which coastal area is most likely to become polluted by this waste?
asked by Michelle 
Earth science
Earth’s troposphere, hydrosphere, and lithosphere contain relatively large amounts of which element?
asked by Rihanna 
la
shoud students who fail their classes be retained and have to repeat the grade ?
asked by kate 
la
shoud students who fail their classes be retained and have to repeat the grade ?
asked by kate 
math
What is the value of u in the following system of linear equations? 4u + 3v = –1 3u + 2v = 1 a) 5 b)11/2 C)7 d)19/3
asked by joe 
math
If Jo is supposed to read onehalf of a 100page book for an English assignment and she has finished 38 pages, what percent of the assignment does she have left to do? Please answer and explain.
asked by Anonymous 
math
What is the value of t in the solution to this systems of linear equations? 2s – 3t = –1 3s – 4t = 0 a)–5 b)3 c)7/3 d)4
asked by tom 
math
Emily,Zeke,Harry,& Brook each conducted surveys on the number of books people have in their homes. Then they answered the question below. "MUST ALL MEASURES OF CENTRAL TENDENCY APPEAR AS A NUMBER IN A SET OF DATA COLLECTED? A. Emily says this is always
asked by andrea 
STATs 353
Find the 98% confidence interval for estimating ìd based on these paired data and assuming normality. (Give your answers correct to one decimal place.) Before 68,58,64,62,58,67 After 40,42,46,37,45,38 Lower limit: Upper limit:
asked by Kim 
social studies
How are the governments of Israel and Saudi Arabia different? How do you think this affects the daily lives of people who live in these countries? I don't know what to put What do they mean?
asked by Jayce 
Find the domain, range and horizontal asymptote
Find the domain, range and horizontal asymptote f(x)=2^x2
asked by Alley 
math
Students submitted pictures for the school yearbook. Only 4/5 of the submitted pictures fit in the yearbook. There were 105 pictures that did not fit. Approximately how many total pictures were submitted for the yearbook? A. 105 B. 210 C. 420 D. 500
asked by andrea 
Algebra 1
The student council is buying school Tshirts to sell during a fundraiser. The cost (y) of school Tshirts is a linear function of the number of Tshirts bought (x). The student council can buy 100 Tshirts for $825 and 300 Tshirts for $2,425. Write an
asked by Amy 
math
How do you find 60% of 20?
asked by Anonymous 
Physics
A constant torque of 22.9 N·m is applied to a grindstone whose moment of inertia is 0.168 kg·m2. Using energy principles, and neglecting friction, find the angular speed after the grindstone has made 17.1 rev, assuming it started from rest. Answer in
asked by dallas 
Math
Lou eats 6/8 of a pizza. What fraction of pizza is left over?
asked by Anonymous 
math
Max,Owen,Elise, and Cara went to a school carnival. They each played the dart throw,ring toss,water shoot,and basketball throw. Each student won a different game. CLUES:*Max didn't score any points at the dart throw. * Elise correctly tossed 2 rings, but
asked by andrea 
math
What is the value of t in the solution to this systems of linear equations? 2s – 3t = –1 3s – 4t = 0 a)–5 b)3 c)7/3 d)4
asked by tom 
math
Between which two consecutive integers is the value of this irrational number? square root of 117? A. 8 and 9 B. 10 and 11 C. 14 and 15 D. 20 and 21
asked by andrea 
social studies
1.Israel is much smaller in land area than Saudi Arabia, but it is the center of more conflict over land ownership.Why do you think this is the case? Because most people live along the coastal plain in Israel and the eastern interior is dry and includes
asked by Jayce 
Math HELP!!!
The booster club sold tickets to a high school basketball game. They sold 700 student tickets and 500 general admission tickets, and raised a total of $5000. The combined cost of one student ticket and one general admission ticket was $8. The equations and
asked by JSHJHDH 
Math
1.During the last 5 shifts, Gary delivered 9,8,14,17, and 12 pizzas. What is the mean number of pizzas delivered during a shift? 12 2.Stephie's science experiment produced the following results:183,204,179,191,186.What is the range? 26 3.What is the mode
asked by Jerald 
Algebra 1B
A painter can use the formula A=2/3bh to estimate the Area of space under the parabola, where b is the length of the base and h is the height from the base to the vertex. Calculate the area, in square feet under each arch.
asked by Frank J 
Math  Please Answer ASAP
A 182 cm tall man is digging a hole in the ground. He stops for a moment and says: "I am done with one quarter of the hole. When I finish the job the top of my head is going to be three times as far under the ground as far it is above the ground now." How
asked by Nikee 
chemistry
The pH of a .10M HOBr solution is 4.8 1. What is [H+] in that solution? 2. What is [OBr]? What is [HOBr]? (where do the H+ and OBr ions come from?) 3. what is the value of Ka for HOBr? what is the value for pKa?
asked by Ray 
math
What is the value of u in the following system of linear equations? 4u + 3v = –1 3u + 2v = 1 a) 5 b)11/2 C)7 d)19/3
asked by tom 
MATH!!
Andy, Barbara and Chrisy play a game. Their probabilities of winning are 1/2, 1/3, and 1/6 respectively. What is the probability that each wins exatly one of the first three games played? Express your answer as a common fraction.
asked by shaun 
Math
1A piece of fabric 3/10 of a meter long was but from a bolt that held 9/10 of a meter of fabric.How much fabric was left on the bolt? Express your answer in simplest terms 7/10 2Add.Simplify 5 3/16+2 7/16 7 5/8 3Subtract.Simplify 52 1/2 I don't know how
asked by Jerald 
Domain of composite function
Find the domain of the composite function fog. f(x)=x^2+3;g(x)=sqrtx4
asked by Alley 
General(dont know actual subject)
My project is research based... I chose plastic surgery.... Question is: why have you chosen this task? ( in the box below write a paragraph explaining why you have selected your particualar task idea.) I really cant think of why i chose plastic surgery
asked by Kaitlyn 
Math
16.Four students are in line to perform in the talent show. Sally is ahead of Kevin. Marcus is behind Kevin. Sally is behind Jenny. Who is first in line Jenny
asked by Jerald 
Math
Coach Hank has two children. Her daughter is twice as old as her son. The sum of their ages is 15. How old is her son? 5
asked by Jerald 
Math
The basketball team scored 38,48,42, and 38 points in four games. What was the average points scored 41 Find the median of the data set 59 64 42 51 55 55 The noon temperature for last four days were 62 58 70 and 66. What was the range and mean range is 12
asked by Jerald 
English comp
I am trying to turn a poem into prose and I am totally lost. Can some help me if I send them the poem?
asked by Rhonda 
chemistry
If a 1.59 mole sample of argon occupies 3.07 L at constant temperature and pressure then what volume will 4.35 moles of argon occupy at the same conditions?
asked by sarah 
Physics
A spring with a spring constant of 35.0 N/m is attached to diﬀerent masses, and the system is set in motion. What is the period for a mass of 34 g? Answer in units of s
asked by alice 
math
find mean median and mode of 10 1 10 15 1 7 10 10 1 6 13
asked by joseph 
chem
the volume of 0.220 mol of an ideal gas at 34°C is increased isothermally from an initial volume of 12.0 L. If the final volume is 21.5 L, calculate the entropy change for the process.
asked by hannah 
math
in her coin collection, holly has 1/3 more coins than jim has in his collection. if the number of coins in 1/2 of holly's collection is 10 more than the number of coins in 1/3 of jim's collection, how many coins does each have?
asked by Anonymous 
Chemistry 111
Write the conjugate acid for each of the following: a. HCO3^1 ____________________ b. H2O ____________________
asked by Sean 
BIO
If 10 DNA template molecules are used and 20 cycles of PCR, how many copies of a template would be amplified? I am pretty sure I cannot use 2^n (n equals the number of amplification cycles)because I don't have a single molecule of starting DNA template.
asked by Lara 
Physics
The electric field lines surrounding three charges are shown in the figure below. The center charge is q2 = 15.9 µC.
asked by Zack 
Chemistry 111
Write the conjugate base for each of the following: a. HPO4^2 ____________________ b. H2O ____________________
asked by Sean 
Physics
A force of 2000N is used to push a box up am inclined plane that is 15m long. If the 100 kg box is raised to a height of 8m,how much work is done against friction ?let g=10m/s^2.
asked by Riana 
Chemisty!
How many milliliters of concentrated ammonia, 15 M NH3, would you dilute to 250 mL to produce 0.162 M NH3?
asked by Alex 
Chemistry 111
a) Write Bronsted acidbase equilibrium equations for the following: b) Show the acidbase conjugated species, labeling all species (1) HSO4 + C2O42 (2) HPO42 + NH4+
asked by Sean 
Math
Find the mode of the data set 48 52 29 38 29 36 42 29 Charlotte read five books with the following number of pages 185,212,146,165,and 197. What was the mean number of pages in the books 181 Enochs scores on seven tests were 85 68 91 75 82 79 and 93 What
asked by Jerald 
Math
Point A represents what fraction 0 1/8 2/8 3/8 4/8 A 6/8 7/8 1 5/8? Write a symbol > < or = to compare the fractions 3/4___17/20 < Add. Simplify 3 5/8+2 2/3 1 7/24
asked by Jerald 
Math
Paula invested into two accounts; one pays 5% simple interest and the other 6% simple interest. She invested $3000 more in the account paying 6% than in the other account 5%. At the the end of the first year, Paula total return was 730. How much did she
asked by Sandra 
math
Please help 1. 3 x (8 + 5) + 2 2. 9 x (8 / 4 x 5) By the way / means dividing
asked by Anonymous 
Math 112
Can you use the numbers 1  9, along with any math symbols and operations, to arrive at the answer of 100 when the 6 and 9 have a negative sign in front of them?
asked by Vanessa Help please 
math
in her coin collection, holly has 1/3 more coins than jim has in his collection. if the number of coins in 1/2 of holly's collection is 10 more than the number of coins in 1/3 of jim's collection, how many coins does each have?
asked by chrissy 
chemistry
How many milliliters of commercial hydrochloric acid, which is 11.6 M, should be used to prepare 6.94 L of 0.52 M HCl?
asked by Alex 
fraction
41/2+21/2
asked by julieta 
Chemistry
What is the effect of aqeour ammonia on (NH4)2SO4.FeSO4.6H2O?
asked by Paul 
Math
Paul baby sat for 4 1/5 hours on Friday and 2 1/4 hours on Saturday how many more hours did he baby sit on Friday 1 19/20
asked by Jerald 
Public Speaking
1. When your speech adds to your listeners’ knowledge, it is meant to: A. inform. B. persuade. C. entertain. D. celebrate. is it A 2. In choosing a topic for your first speech, it is wise to: A. ask advice from others. B. start with what you know. C.
asked by Amy 
chemistry
Calculate the new molarity when 150 mL of water is added to 125 mL of 8.55 M HBr.
asked by Alex 
math
find the ratio of the circumference 44ft to the diameter 14ft of a circle. write answer as a fraction in simplest form
asked by Jasmine 
help making equations
Superbats, Inc., manufactures two different quality of wood baseball bats, the Wallbanger and the Dingbat. The Wallbanger takes 8 hours to trim and turn on a lathe and 2 hours to finish it. It has a profit of $17. The Dingbat takes 5 hours to trim and turn
asked by kim 
exponential functions in math
my daughter needs some help studying for a unit test using exponential functions in math
asked by tiffny 
Public Speaking
1. Effective public speaking is: A. audiencecentered. B. messagecentered. C. speakercentered. D. channelcentered. is it A 2. When a speech attempts to influence the audience s beliefs, attitudes, and opinions about something, it is generally meant to:
asked by Amy 
Philosophy
True or false 1.Friedrich Schleiermacher argued that to understand the meaning of the Bible or any other text, it is necessary to consider the time and place of its author(s), and to ascertain the intention of the author(s) in producing the text. True
asked by Christopher 
Pre calc
Given the (x,y) coordinates of a point are (1,2) find 2 different (r, feta) coordinates? one with r > 0 and one with r< 0. a. Feta between zero and 2pie b. Feta between negative pie and pie c. Feta between 2pie and 4pie
asked by Rebekah 
Math
What is a attribute?
asked by Grace 
Chemistry
Urgent... Someone please help!! Can someone please check to see if I am doing these correctly, I have a test tomorrow... Thank you :) Q) Calculate the new molarity of a 35mL sample of 0.450 M CaCl2 solution that is diluted with enough water to make 250 mL
asked by Kishwa 
physics
7. No work is done by gravity on a bowling ball resting or moving on a bowling alley because the force of gravity on the ball acts perpendicular to the surface. But on an incline, the force of gravity has a vector component parallel to the alley. Discuss
asked by Anonymous 
public Speaking
1. Which of the following is a demographic characteristic of an audience? A. Size B. Lifestyle C. Gender D. Values is it C 2. When speaking about the awareness of breast cancer, the most important thing to consider when analyzing your audience is: A.
asked by Amy 
Math
The sunglasses that Ramon wants to buy are 50% off the original price of 85$ .How much did he have to pay?
asked by Grace 
Vocabulary
Researchers who study this have come up with some [convincing] exanples. In this sentence, the word convincing means: A) interesting B) persuasive C) expected D) humorous Check: B. persuasive
asked by Celest 
Public speaking
Attitudes, beliefs, values, and motivation are characteristics of: A. psychographics. B. demographics. C. the speaker’s profile. D. the audience’s response to the speech. is it B 2. Nicole was asked to speak to the French Club about her trip to
asked by Amy 
hodges
which has the largest radius K, Ca, K+ or Na?
asked by reb 
Algebra
A rock is dropped from a riverbank that is 4 feet above the surface of the river. After how many seconds does the rock hit the surface of the water? At highest?
asked by Mary 
public speaking
1. A speaker talking about the benefits of cosmetic surgery to an audience primarily of women is appealing to which level of needs in Maslow’s Hierarchy of Needs? A. Physiological needs B. Esteem needs C. Belongingness and love D. Safety needs.. is it B
asked by Amy 
chemistry
ch4(g)+nh3(g) translate into words help!
asked by lolol 
Math
One half of 9.76
asked by Grace 
stats
Question Part Points Submissions Used The number of ships to arrive at a harbor on any given day is a random variable represented by x. The probability distribution of x is as follows. (Give your answers correct to two decimal places.) x 10 11 12 13 14
asked by kim 
Math
What property is this? 4(7+9)=(4x7)+(4x9)
asked by Grace 
Physics
The earth's Field is Roughly equivalent to an axial centered dipole. Find the vertical rate of change of the vertical component of the earth's field in gammas/foot here at flagstaff. Given" vertical component of earth's magnetic field at flagstaff is equal
asked by Jessica 
Math
Need help on the question below. Which of the following questions is best suited for an experiment? a. what conditions do peppers need to grow? b. do peppers grow taller with 10ml of daily watering or with 15ml of daily watering c. what conditions do
asked by Brandi 
Physics
You are standing on a beach and 5 wave crests land on shore in 50 seconds. Each wave is 32m apart. Find Frequency, period, wavelength and speed.
asked by Andrea 
math
one gallon of paint will cover 200 squar feet of wall. the room has walls 7.5 feet high. what is the greatest lengh of wall that can be covered by one gallon of paint?
asked by dylan lopez 
Physics
Three forces act on an object at the same time. F1 = 10.0 N 50.0degrees north of east, F2 = 15.0 N 25.0degrees south of west, and F3 = 15.0 N 38.0degrees east of south. What is the magnitude and direction of the net force?
asked by Rosa 
Math
Need help with one more question. Which best describes a statistical question? a. a question that contains numbers b. a question about numbers c. a question about designing an experiment d. a question about a population or sample. I was thinking it might
asked by Brandi 
Math
A stock opened at 62 1/4 points and closed at 57 5/8 points. Find the change in the stock price 4 10/16
asked by Jerald 
Physics
Three forces act on an object at the same time. F1 = 100. N at 30.0degrees north of east, F2 = 200. N at 45.0degrees north of west, and F3 = 100. N at 30.0degrees east of south. What are the magnitudes and direction of both the resultant force and
asked by Rosa 
English
American Life, stereotypes? Just like television, commercial, etc. When we are watching TV, it gives us a "snapshot" of American life. If you look at the commercials alone, what would this tell you about how we live? I ask you to pretend that you are from
asked by Erin 
math
random sample of 9600 students. Multistage design effect similar to an SRS (for those still in school) 46% had at least one parent who was a college graduate. Estimate with 99% confidence the proportion of all students who had at least one parent who was a
asked by Please Help 
math
T and S share a digital music player that randomly selects songs to play. Together T and S have loaded 3476 songs. T and S want to know if each have loaded a different proportion of songs. When in randomselection mode, 22 of first 30 songs selected were
asked by Nabil 
Math 1 question
solve for c : 5c/6 + 1/2 = c/4 Please help, thanks :)
asked by Olly 
math
10cm^3 of a normal specimen of human blood contains 1.2g of hemoglobin. How many grams does 47cm^3 of the same blood contain?
asked by pam 
government
which of the following determines who holds the position of speaker of the house?
asked by john 
Algebra 2
4t^24/9(t+1)^2 * 3t+3/2t2
asked by Abbi 
math
A long distance trucker traveled 300 miles in one direction during a snow strm. The return trip in rainy weather was accomplished at double the speed and took 5 hours less time. What was the speed going?
asked by pam 
algebra 1
The length of a rectangle is 4m more than the width. The area of the rectangle is 45 m squared. Find the length and width. Please help!
asked by suzy 
government
which of the following determines who holds the position of speaker of the house? a the president b the house c the senate d the joint houses of congress
asked by john 
MATH
Jack usually mows his lawn in 3 hours. Marilyn can mow the same yard in 5 hours. How long would it take them to mow the lawn together?
asked by pam 
government
congress shares power with the president in the field of foreign affairs. what other powers do congress and the president share? a judicial powers b postal powers c territorial powers d war powers
asked by john 
Chemistry
How much 1.0 M NaOH would be required to completely neutralize 40.0 mL of 0.60 M HCl?
asked by Cary 
Chemistry
4. A 5.309 g antacid tablet, with CaCO3 as the active ingredient, was mixed was 30.0 mL of 0.831 M HCl. It took 15.3 mL of 0.7034 M NaOH to neutralize the excess acid. a) Calculate the volume of HCl neutralized by the NaOH. b) Calculate the amount of HCl
asked by Josh 
math
sonya spent 2/5 of her money and then had $18 left. how much money did she originally have?
asked by renee 
Chemistry
1. If a student forms CaCO3 from the presence of carbon dioxide, but continued with the trial anyway, how would this affect his/her calculations (too high, too low, or no effect)? Explain your answers. a) The volume of NaOH required for the back titration.
asked by Josh 
Chemistry
Some antacid tablets actually contain a mixture of calcium carbonate and magnesium hydroxide (though they usually have the same “strength” as those that only contain CaCO3). If this had been the case for the antacid you tested, but you still assumed it
asked by Jim 
Chemistry
You have .8 liters of a 0.5M HCl solution. If you use this solution to complete a decomposition reaction of HCl how many moles of hydrogen (H2) would be produced?
asked by John 
math
you are looking for a safe place to put 30,000.00 for one yr. Bank A offers 2.46% interest rate continuously. Bank B offers 2.48% quarterly and Bank C offers 2.47% monthly. Find the most effective rate of each to determine which would earn you the most
asked by Kat 
government
what is the implied power expressed by the necessary and proper clause in the constitution a congress's ability to make laws is severely limited by the Constitution b congress is given limited authority to interpret reserved powers c congress must follow a
asked by john 
Chemistry
How do you calculate the standard enthalpy change for the reaction of an aqueous solution of barium hydroxide, Ba(OH)2, with an aqueous solution of ammonium nitrate, NH4NO3, at 25 degrees C? The complete ionic equation is: Ba2+(aq) + 2OH(aq) + 2NH4+(aq) +
asked by Lisa 
math
Identify the initial value and growth or decay factor in each of the following exponential functions: a) y= 350 x 5^x b) Q= 25000 x (1/2)^t c) P=(7 x 10^3) x 4^t d) N= 5000 x (9/10)^t
asked by kristy 
Math
Triangle Lmn is similar to triangle xyz. Triangle LMN has a side of 5 and 3. The scale factor of triangle Lmn to triangle xyz is 2:5. What is triangle xyz's length? Helppppp Meeeeeeeeeee!!!
asked by Bre 
math
When at rest, two trains have sirens that emit a frequency of 300 Hz. The trains travel toward one another and toward an observer stationed between them. One of the trains moves at 30.0 m/s, and the observer hears a beat frequency of 3.6 beats per second.
asked by lucy 
math
the length of a photograph is 1 cm less than twice the width. the area is 28 cm squared. find the dimensions of the photograph.
asked by sally 
precalculus
Evaluate the following expressions. Your answer must be an angle in radians and in the interval [(pi/2),(pi/2)] . (a) sin^(1)(0) = (b) sin^(1)((sqrt3)/2) = (c) sin^(1)(1/2) =
asked by Anonymous 
geometry
Chris is making a painting with only triangles. He wants each side of the triangles to be the same length. What kind of triangle will he paint?
asked by Ms.Vargas 
finite math
What is the present value of an ordinary annuity which has payments of $1100 per year for 19 years at 5% compounded annually.
asked by Debra 
math
a) A linear function f(t)=b + mt has a slope of 4 and vertical intercept of 20. Find its equation. b) An exponential function g(t)=Ca^t has a decay factor of 1/4 and an initial value of 20. Find its equation. Plot both functions
asked by Gabriella 
Chemistry 2
A titration is performed by adding 0.124 M KOH to 40 mL of 0.159 M HNO3. a) Calculate the pH before addition of any KOH. b) Calculate the pH after the addition of 10.26, 25.65 and 50.29 mL of the base.(Show your work in detail for one of the volumes.) c)
asked by Antonio 
math
Subjects were asked to taste two wine samples in sequence. Both samples given were the same wine although subjects were expecting to taste two different samples. Of the 32 subjects in the study, 22 selected the wine presented first when presented with two
asked by sushmitha 
math
Jeremiah made a pitcher of iced tea. Which is most likely the capacity of the pitcher?
asked by Ms.Vargas 
English/writinh
Im having a hard time starting my introduction for my essay. I already wrote my thesis statement which is: " In Nathaniel Hawthorne’s, The Scarlet Letter, it suggests that one must find their own internal strength and strive for individual redemption by
asked by Sarah 
cal
a rancher has 4000 feet of fencing for constructing a rectangular corral. one side of the corral will be formed by a barn and requires no fence. three exterior fences and 2 interior fences partition the corral into 3 rectangular regions. what dimension of
asked by Lufy 
Science
How many grams of CaCl2 are required to prepare 2.00 liters of 7.00 M CaCl2?
asked by Destiny 
math
find the solution of the following system of equations xy=0 x+y=4
asked by adriana 
math
George painted his room yesterday. he use 1/8 of the paint in can in the morning and 5/8 of the paint in the afternoon.his much of the did he use?
asked by reyna German 
math
George painted his room yesterday. he use 1/8 of the paint in can in the morning and 5/8 of the paint in the afternoon.his much of the did he use?
asked by reyna German 
math 141
Three machines turn out all the products in a factory, with the first machine producing 40% of the products, the second machine 35%, and the third machine 25%. The first machine produces defective products 12% of the time, the second machine 3% of the time
asked by Tim 
Physics 2
Light with λ = 530 nm passes through a single slit and then illuminates a screen 9.0 m away. If the distance on the screen from the first dark fringe to the center of the interference pattern is 3.20 mm, what is the width of the slit?
asked by Madison 
physics
c). at what speed does it hit the ground? d). what total length of time is the ball in the air
asked by sue 
science
if a ball that has a density of 1.17 g cm3 placed in the beaker, where will the ball come to rest
asked by diana 
chemistry
At 10°C below the melting point of aluminum, 0.08% of the atom sites are vacant. At 484°C only 0.01% are vacant. Given this information, determine the energy of vacancy formation (ΔHv) for aluminum. Energy of vacancy formation (in joules / vacancy):
asked by adex 
chemistry
Determine the radius of the largest atom that can be accommodated in the interstices of BCC iron (Fe) without stress. (Hint: the center of the largest site is at ½, ¼, 0; draw a unit cell  it helps.) Radius (in centimeters):
asked by adex 
chemistry
An activationenergy of 2.0 eV is required to form a vacancy in a metal. At 800°C there is one vacancy for every 104 atoms. At what temperature will there be one vacancy for every 1000 atoms? Temperature (in degrees Kelvin): unanswered
asked by adex 
Math
I need to verify this equation and I get stuck after trying everything I can think of. Help! cos(4x)=4[sin(x)cos(x)sin^3(x)cos(x)]
asked by Matt 
college physics
a tennis ball is thrown straight up with an initial velocity of 22.5 m/s. it is caught at the same distance above the ground. a). how long does it take to reach its maximum height? b). how high does the ball rise? c). at what speed does it hit the ground?
asked by confused 
science
can you simply explain what happens to ice that breaks off a glacier that lands in the water
asked by kathy