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August 22, 2014

Posts by ANDREA


Total # Posts: 683

7th grade advanced math
who knows the answer to 2*2604(52/9)/7*43+62/56
September 10, 2008

Ethnic Diversity
This Class is suppose to teach us how racism is wrong and why you can not discriminate in any business in America. I do think that Axia needs to improve the curriculum
September 2, 2008

Ethnic Diversity
I agree with everyone, the answer is not anywhere to be found. I can say that after the research and no real answers the only changes I can figure happened is that after 911 all Arabs and Muslims were automatically assumed to be a terrorist and the FBI was aloud to treat them ...
September 2, 2008

8th grade
I need to find the percent of the total area of New York City that each borough covers. Bronx 41miles Manhattan 23 miles Queens 110 miles Brooklyn 73 miles Staten Island 56 miles Not sure how to figure it?
August 27, 2008

Math
What is a linear foot?
July 30, 2008

Math
According to a rating agency, a car's MPG (miles per gallon) ratings are: 25 MPG for city and 30 MPG for highway driving. A driver spent $20.00 (the gasoline costs $1.25/gallon) on a combined city and highway trip of 450 miles. How many miles "C" in city and &...
July 28, 2008

Math
According to a rating agency, a car's MPG (miles per gallon) ratings are: 25 MPG for city and 30 MPG for highway driving. A driver spent $20.00 (the gasoline costs $1.25/gallon) on a combined city and highway trip of 450 miles. How many miles "C" in city and &...
July 28, 2008

Math
Suppose you have two alcohol+water solutions. One solution ( of volume x liter ) is 45% alcohol, while the second solution (of volume y liter) is 75% alcohol. What values of "x" and "y" (in liters) will fill a total volume of 5.0 liter which contains 2.88 ...
July 26, 2008

Math
According to a rating agency, a car's MPG (miles per gallon) ratings are: 25 MPG for city and 30 MPG for highway driving. A driver spent $20.00 (the gasoline costs $1.25/gallon) on a combined city and highway trip of 450 miles. How many miles "C" in city and &...
July 26, 2008

Pre-Calculus
A car manufacturing company (the Company) can produce a car for $3000.00 and a truck for $5000.00. Suppose "C" cars and "T" trucks are sold to the dealer at mark-ups, respectively, of 20 and 30 percent. If the Company made a profit of $27 million on sales ...
July 24, 2008

Pre-Calculus
I tried to solve it using those equations but my answer for T is a negative number which I know it can't be
July 24, 2008

Pre-Calculus
I tried it this way and my answer for
July 24, 2008

Pre-Calculus
A car manufacturing company (the Company) can produce a car for $3000.00 and a truck for $5000.00. Suppose "C" cars and "T" trucks are sold to the dealer at mark-ups, respectively, of 20 and 30 percent. If the Company made a profit of $27 million on sales ...
July 24, 2008

Pre-Calculus
The treatment of a certain viral disease requires a combination dose of drugs D1 and D2. Each unit of D1 contains 1 milligram of factor X and 2 milligrams of factor Y, and each unit of D2 contains 2 milligrams of factor X and 3 milligrams of factor Y. If the most effective ...
July 24, 2008

Trignonmetry
What is sin of 660? And What is csc(-2pi)/3?
July 13, 2008

sound
a wave front has the form of a ?
June 18, 2008

Stats
a teacher teaches two sections (A and B) of a class. Both sections have a mean score of 75. Section A only has 5 students and they all received a score of 75, while section B has 15 students with a mean score of 75 with a variance of 12. What is the standard deviation of the ...
May 28, 2008

science
Provide at least three freshwater and three ocean water resource challenges
May 23, 2008

business
What would the main components of a company business model be such as Krogers
May 22, 2008

chemistry
a compound containing 3 atoms of carbon and 8 atoms ofhydrgen is combined in a reaction with oxegyn molecules the two end products of this eqation are carbon dioxide co 2 and water what elemement should i look at first in balancing this eqation oxygen hydrgen carbon or dioxide...
May 12, 2008

chemistry
sorry i will improve my english which is correct of this eqation reactants---products products=reactants reactants=sum or sum----reactants i just do not get this
May 12, 2008

chemistry
wich of the following shows the correct terms for the two sides of a chemical eqation correctly placed to the left or right where thay belong an also shows the correct symbol reactants---products products=reactants reactants=sum or sum----reactants please help again lol
May 12, 2008

chemistry
a test liquid has a density of 1.1g ml wen u pour some of it in a cup of water what will happen assuming that they have no chemical reaction
May 12, 2008

chemistry
which of the following is not acidic milk saliva softdrink or blood
May 12, 2008

chemistry
how many neutrons r there in a phosphorus atom
May 12, 2008

chemistry
wen determining the formula for a compound its important to no the valance no of each element suppose element a has a valance no of 3 an element b has a valence no of 2 if the two elements combine then wen writing the formula for the resulting compound wat subscript no will be...
May 12, 2008

chemistry
what is c3h8 dioxide or hydrogen
May 12, 2008

chemistry
sir i didnt understand the first i made it more detailed for u though ty
May 12, 2008

chemistry
a carbon containing 3 atoms of carbon and 8 atoms of hydrdren combinend in reactionwith oxygen molecules the 2 end products of this eqation are carbon dioxide co 2 an water what element should i look at first inn this oxygen hydrogen carbon or dioxide and wen finish balancing ...
May 12, 2008

chemistry
my ques ok a coumpond containing 3atoms of carbon an 8 atoms ofhydrogen combined in reaction with oxy molecules the two end products of this eqation are carbon dioxide co2 an water wat element should i look at first in balancing this question and wen i hav finished balancing ...
May 12, 2008

Englis
Name any fallacy in this essay One day in January 1995 a number of companies in San Diego, California, woke up to find that they had a "deficient work force." This new designation, which had literally come overnight, had nothing to do with the intelligence of the ...
May 8, 2008

English
A poem by Linda pasta can be found here: "w w w. theatlantic . c o m / doc/200708 / linda-pastan-ash" (withoutspaces) I was wondering if my analysis of this poem is correct. This poem is about death. When you're cremated you are transformed from a body into ashes...
May 6, 2008

Mathematics
Give the place value of 7 in 3,738,500.
April 27, 2008

arithmetic
Give the place value of 7 in 3,738,500.
April 27, 2008

Physics
If the distance between two slits is .05mm and the distance to the screen is 2.5m find the spacing between the first and second order bright fringees for yellow light of wavelenght 600nm. d=5x10^-5m L=2.5m wavelength= 6x10^-7m x=? x=wavelength*L/d =(6x10^-7)(2.5)/5x10^-5m =....
April 22, 2008

Physics
4th order dark fringe and 2nd order bright fring spaced 2.5cm apart appear on the screen placed 1 m behind the double slit. What is the spacing of the slits if the waveleght of incident light is 500nm? x=2.5cm=.025m L=1m wavelegth= 500nm = 5x10^-7m d=? x/L=wavelength/d d= (...
April 22, 2008

Physics
magnetic field lines near a wire perpendicular to this page carry current out of page a_ circles clockwise b_ circle counter-clockwise c_ radiate inward d_ radiate outward isn't it b) when you use the right hand rule
April 21, 2008

Physics
An optometrist has perscribed you 2D glasses. This means a) you are farsighted and the focal lenght of your glasses lens is +.5m b)you are nearsighted and the focal lenght of your glasses lens is +.5m c)you are farsighted and the focal lenght of your glasses lens is -.5m d)you...
April 21, 2008

Physics
Which of the following is NOT true? A permanet magnet: a) will always be magnitized b) can be demagnitized by heating c) can be demagnitized by hammering d) can be remagnitized by placing it in external magnetic field I eliminated c),and d) I think the correct answer is a) ...
April 21, 2008

Physics
Which one is a true statement? The magnetic field of the Earth: a)never changes b)continuously changes c) sometimes vanishes entirely d) is uniform Isn't it b) I know that a) and c) are wrong.
April 21, 2008

Physics
Three particles have identical masses and identical inital velocities. These particles are projected one at a time into a region in which there is a uniform magnetic field B perpendicular to their velocities. If two of the particles are deflected in opposite directions and the...
April 21, 2008

Physics
The incident ray comes at 30 degrees to normal at the air/glass boundary and is refracted at 18 degrees to normal. a) find index of refraction of glass b)find speed of light in glass c) under what conditions and for what angles will you have total internal reflection in this ...
April 16, 2008

Physics
What is the critical angles for water ice when surrounded by air? theda critial = arcsin(n2/n1) =arcsin(1/n1) What is the index of refraction of water ice? also is the above equation correct?
April 16, 2008

Physics
n=1.331 for red light in water and n=1.34 for blue light in water. If a ray of white light enters teh water at 83 degrees what are the underwater angles of refraction for the blue and red components of white light? Also using Snell's law : (sin theda 1/ sin theda 2) = (n2/...
April 16, 2008

Physics
A ray of light stikes a flat 2 cm thick block of ice (n=1.5) at an angle of 45 degrees. Refracted ray travels through the glass and then is refracted back to air at the opposite side of the block. Find the angles of incident and refraction at each surface. Snell's law ...
April 16, 2008

Physics
A beam of light is incident on the surface of clear ice at 60 degrees with the normal. Find the angle between reflected and refracted ray. theda 1=60 n1= 1 (air) What would n2 be for clear ice? I know that index of refraction for water is 1.33. Would it also be 1.33? Snell'...
April 16, 2008

Physics
Find the speed of light in flint glass if the index of refraction is n=1.66. How much slower in percent of speed of light in a vacuum c does the light move in each of this medium? v=c/n v=3x10^8m/s/1.66 =1.8x10^8m/s For the percent of speed of light in a vacuum c. Would it be...
April 16, 2008

Physics
Is it possible to see a virtual image? a)no they don't exist b)yes the rays appear to emanate from a virtual image c)yes since almost everything we see is virtual because most things do not themselves give off light, but only reflect light coming from some other source d)...
April 9, 2008

Physics
an electric field is produced by a a)consant magnetic field b)changing magnetic field c)either a consant or changing magnetic field d)none of the above I choose b) because in a lab we once dealt with something similar to this question but I can't exactly remember whether ...
April 9, 2008

C++ Programming
how do you convert 2 for binary to decimal using c++ program
April 9, 2008

Physics
#1 If the inductance in the LC circuit is quadrupled the natural frequency of that circuit will a)increase to 4 times its original value b)increase to twice its original value c)decrease to 1/2 of its original value d)decrease to 1/4 of its original value Isn't the correct...
April 9, 2008

Physics
You have two identical resistors 50kohm each and a 1.5V battery. Which of the following statements are true a)the current drawn is bigger if the resistors are in series b) the current drawn is bigger if the resistors are in parallel c)the voltage across each resistor is bigger...
April 6, 2008

Physics
1)An electron moved from point A to point B along an equipotential surface. a)the eclectron performs work in moving from point A to point B b)Work is required to move the electron from point A to point B c)Work is both required and performed in moving the electron from point A...
April 6, 2008

Physics
The materials with the lowest resistance are called a) conductors b)superconductors c)semiconductors d) insulators I can't decide between a) or b) but if I had to choose one would the correct one be b)?
April 5, 2008

Physics
1)Several resistors are connected in parallel. If a battery provides constant voltage in this circuit the addition of another resistor in parallel a)increases current through each resistor b)decreases current through each resistor c)doesn't affect the current through any ...
April 5, 2008

Physics
An electron is placed near a neutron. Which statement best describes the electrostatic force between them? a) there's no force between them since one is neutral b)there's a force of repulsion between them c)there's a force of attraction between them Isn't it a...
April 5, 2008

Physics
For an electron moving in a direction of the electric field its potential energy _______ and its electric potential _________. Wouldn't the blanks be "increases" and "decreases"? because PE=mgh while V=kq/r
April 5, 2008

Physics
The equipotential lines inside a parallel plate capacitor a) circles clockwise b)circles counterclockwise c)radiates inwards d)radiates outwards e)runs parallel to capacitor plates f)runs perpendicular to capacitor plates I have narrowed it down to either e) or f) but I think ...
April 4, 2008

Physics
When discharging a capacitor it will a) loose half of its charge in equal time intervals b) loose a third of its charge in equal time intervals c) loose a quarter of its charge in equal time intervals d) gain half of its charge in equal time intervals I know that d) isn't ...
April 4, 2008

Physics
1)Several resistors are connected in series. If a battery provides constant voltage in this circuit the addition of another resistor in series a)increases current through each resistor b)decreases current through each resistor c)doesn't affect the current throught any ...
April 4, 2008

Physics
A circuit with a capacitor took .138s to discharge from its max charge Qmax to half of that max charge once the battery was removed. In this series circuit there also is one resistor with 100 G(ohm symbol). The voltage drop is 12V across the battery. a)How much time would it ...
April 4, 2008

Physics
A circuit with a capacitor took .128s to discharge from its max charge Qmax to half of that max charge once the battery was removed. In this series circuit there also is one resistor with 100 G(ohm symbol). The voltage drop is 12V across the battery. What is the time constant ...
April 3, 2008

algebra
m-450=1/4m -450=1/4m-1m -450=1/4m-4/4m -450=-3/4m -450*(-4/3)=m 600=m
April 3, 2008

Physics
If the TV draws a 150W of power, the dishwasher 1500 W of power and the computer 100 W of power, will a typical 15 A circuit breaker trip if they operate simultaneously on one line? Explain why. Isn't P= IV and P=I^2R and P- V^2/R So wouldn't that mean that as these ...
April 3, 2008

Physics
When Gorix escaped from Dr. Sloth's ship, his ship started at rest. Gorix immediately set his thrusters to full power, and his ship's acceleration increased by 2 m/s2 every second for 15 seconds. At that point, the ship remained at constant acceleration for another 30 ...
April 3, 2008

Physics
A sexond smaller metal sphere was positioned near the van de Graff machine. THe sphere was grounded. Did this snaller sphere become charged? How and why? was the interaction between the two spheres attractive or repulsive? Explain. Yes the smaller sphere was charged because ...
April 2, 2008

Physics
If the TV draws a 150W of power, the dishwasher 1500 W of power and the computer 100 W of power, will a typical 15 A circuit breaker trip if they operate simultaneously on one line? Explain why.
April 2, 2008

Physics
The following appliances are being used simultaneously: toster oven, TV, computer, three 100 W light bulbs and an iron. Yet the circuit breaker (15 A) has not tripped. Does that necessarily mean that not all of these appliacnces are connected to a single circuit? I am having ...
March 26, 2008

Physics
A battery with voltage drop of 120V is connected in a ciruit containing both series and parallel. Moving in a clockwise direction. R1= 3 ohms. Suddenly there is a connection of point A to point B. In between these two points is a parallel circuit with R2= 10 ohms and R3=2ohms ...
March 26, 2008

Anatomy and Physiology
A. Right to left B. proximal to distal C. anterior to ventral D. coronal to transverse The answer is B.
March 21, 2008

Physics
A battery with voltage drop of 120V is connected in a ciruit containing both series and parallel. Moving in a clockwise direction. R1= 3 ohms there is a connection of point A to point B. In between there is a parallel circuit with R2= 10 ohms to R3=2ohms on the top. On the ...
March 19, 2008

vocabulary-sentences
I need help doing my sentences By Andrea
March 11, 2008

Physics
You came across an egg that was a perfect sphere. You placed it in a tub of water and found that it displaced exactly 280,000 cubic centimetres. However, it was floating on the water, and only 72% of the surface area of the egg was below the water line. What was the total ...
March 6, 2008

precalc
We're not supposed to find it using arctan. We have to get one side to be 2 factors that equal zero when multiplied.
March 6, 2008

precalc
Solve sinx+cosx=0 Thanks!
March 6, 2008

science
You came across an egg that was a perfect sphere. You placed it in a tub of water and found that it displaced exactly 280,000 cubic centimetres. However, it was floating on the water, and only 72% of the surface area of the egg was below the water line. What was the total ...
March 6, 2008

physics
An electric charfe of -3 C is moved from a position where the electric potential is 1 V to a position where the electric potential is -6V. What is the chsange in potential energy of the charge with this change in position? I know that change in PE = k(q1q)/r_2 - k(q1q)/r_1 I ...
March 5, 2008

Physics
A block oscillates on a spring and passes its equilibrium position with a speed of .157m/s. It's kinetic energy is zero when the block is at the distance of .1m from equilibrium. Assume no friction between the block and the table. v=.157m/s KE =0J when x=.1m a)First I need...
March 3, 2008

Physics
A violin string is .32m and has a mass of .0005kg. The freqency of the note played is 440Hz. What is the speed of the wave in the string? .5*wavelenght = L wavelength= 2*.32m =.64m v=f(wavelength) =440hz*.64m =281.6m/s b) where must one put one's finger to play a note with...
March 3, 2008

Physics
A guitar string is .75m and has a mass of .005kg. A standing wave is produced when the string is plucked. a) what is the fifth harmonic if the tension in the string is 90N? v=sqrt(F_t/mass density)= 116m/s f1=v/2L = 116m/s/(2*.75m) =77.3Hz fn=n*f1 f5=5*77.3Hz =386.5Hz and to ...
March 3, 2008

environmental science
Why does the FEMA (Federal Emergency Management Area) only allow property owners to collect insurance if they rebuild in the same place and same way as before? Thanks!
March 2, 2008

Physics
A block oscillates on a spring and passes its equilibrium position with a speed of .157m/s. It's kinetic energy is zero when the block is at the distance of .1m from equilibrium. Assume no friction between the block and the table. v=.157m/s KE =0J when x=.1m a)First I need...
March 2, 2008

Physics
A block oscillates on a spring and passes its equilibrium position with a speed of .157m/s. It's kinetic energy is zero when the block is at the distance of .1m from equilibrium. Assume no friction between the block and the table. Force is 8.67N. Also mass displacement is...
March 1, 2008

Physics
Why do your vowels examples ("aaah", "eee", "uhh") sound different then when I make them? Explain. Tension, mass density and the length of our vocal cords differ so would that be the reason why they sound different? For instance: a child's ...
March 1, 2008

Physics
A musician plays the middle C note (262 Hz) on a guitar, a piano, and a violin at the same loudness. Will all three instruments produce exactly the same sound? Why or why not explain. Frequency (262Hz) is the same so that means that the pitch of the sound wave is the same. ...
March 1, 2008

Physics
Why do ocean waves break as they approach the shore? Is it because of the principle of superposition. Would it be described as constructive or destructive interference? I believe it's constructive interference as the two waves combine the amplitude is large which causes ...
February 29, 2008

Physics
A block oscillates on a spring and passes its equilibrium position with a speed of .157m/s. It's kinetic energy is zero when the block is at the distance of .1m from equilibrium. Assume no friction between the block and the table. What is the period of its oscillation? v=....
February 29, 2008

Physics
The frequency of a stationary siren is 1500 Hz when measured by a stationary observer. If an observer moves away from the siren at mach number .85 what is the frequency he hears? (assume room temperature so that velocity of the air is 340m/s) I know that I would use f'=f (...
February 29, 2008

Trig
Verify that each of the following is an identity. tan^2x-sin^2x=tan^2xsin^2x I can get it down to cos^2 on the right, but cannot get it to work out on the left. secx/cosx - tanx/cotx=1 On the left I got down to 1-tan^2, but that clearly doesn't equal 1.... 1-2cos^2x/...
February 28, 2008

History
Eisenhower
February 28, 2008

history
what is the slaves experiences in mid19th century america
February 26, 2008

american history
what businesses came under the scrutiny of the sherman antitrust act in the 1800s?
February 18, 2008

precalc
thanks
February 18, 2008

precalc
Hi. Can someone help me with this? Simplify: (sin^2x)(cos^2x)+(sin^4x) The answer is sin^2x, but I have no idea how to get there! Thanks!
February 18, 2008

science
Suppose you have monohybrid pea plants in your garden and find that they produce round seed to wrinkled seeds in the ratio of 3:1. If the allele are designated (R & r) respectively, what is the probable genotypes of the wrinkled seeds which were produced (F1)? RR & Rr RR only...
February 15, 2008

Math
Find the value of tan(1/2sin^-1 15/17) and sin[pi/2-cos(1/2)] Thanks.
February 13, 2008

Math
how would you factor 4x-x^2-3/ x-1...so that x-1 would cancel out? could you explain step by step..plz
February 8, 2008

Physics
A string of mass m=.1kg is stretched to where its length is L=20m. What is the tension force applied to the string if it takes a pulse 2 seconds to get from one end to the other? m=kg L=20m T=4s mass density =m/L = .1/20 = kg/m Tension =? I know v=sqrt(F_t/mass density) But I...
February 6, 2008

Physics
Find the instantaneous velocity of a pendulum at the instant when its bob is at the height equal to half of its maximum height h=(h_max/2) above teh equilibrium point. Assume the max velocity of the bob during each oscillation is v_max= 2m/s. Wouldn't PE=KE mgh=1/2mv^2 gh=...
February 6, 2008

Physics
A swing is 2m long. how often do you need to push it to increase its swing's amplitude the most? L=2m When amplitude is the most KE=0 and PE is at its maximum. But i'm not completely sure how to solve this problem.
February 6, 2008

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