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2012
November

Questions Asked on November 24, 2012

Which cannot describe a system of linear equations?no solution exactly two solutions infinite solutions exactly one solution I
1. 7 answers
2. asked by Deborah
3. 5,282 views
A 0.02882 g sample of gas occupies 10.0-mL at 288.5 K and 1.10 atm. Upon further analysis, the compound is found to be 38.734% C
1. 6 answers
2. asked by Anon
3. 4,831 views
Chances are 50-50 that a newborn baby will be a girl. For families with five children, what is the probability that all the
1. 2 answers
2. asked by joe
3. 4,551 views
Tell whether the lines for each pair of equations are parallel, perpendicular, or neither.y = –1/4x + 10 –2x + 8y = 6
1. 10 answers
2. asked by Deborah
3. 3,915 views
A charity organization is collecting change to raise monay. They have collected twice as many dimes as quarters, 22 more nickels
1. 3 answers
2. asked by stephy
3. 3,571 views
Scores on the SAT verbal test in recent years follow approximately N(504,111) distribution. What is the proportion of students
1. 2 answers
2. asked by Rae
3. 3,334 views
anna bought 3 types of fruit for a fruit salad. She paid three times as much for buleberries as for pears and $2.50 less for
1. 3 answers
2. asked by karen
3. 3,148 views
Represent this reaction with balanced chemical equation. Disilane gas (Si2H6) undergoes combustion to form solid silicon dioxide
1. 6 answers
2. asked by Shane
3. 3,029 views
A monatomic ideal gas expands from 1.00m^3 to 2.50m^3 st a constant pressure of 2.00x10^5 Pa. Find the change in the internal
1. 1 answer
2. asked by B
3. 2,923 views
A box with no top is to be made by cutting a 2-inch square from each corner of a square sheet of metal. After bending up the
1. 1 answer
2. asked by tino
3. 2,826 views
Solve the following system of equations using substitution. What is the value of y?2x + 3y = 105 x + 2y = 65 A.15 B.25 C.40 D.65
1. 3 answers
2. asked by Deborah
3. 2,520 views
A cone has a radius of 6 inches and a height of 9 inchesa) calculate the volume of the cone. use pi. as my answer for part a i
1. 3 answers
2. asked by karen
3. 2,332 views
A cylindrical water tank of diameter 1.4m and height 2.1m is being feed by a pipe of diameter 3.5cm through which water follows
1. 5 answers
2. asked by TUHITUHI
3. 2,240 views
what is the percent by mass of carbon in c3h8?A. 18.20% B. 20.0% C. 81.8% D. 85.0% I say A
1. 3 answers
2. asked by drew
3. 2,152 views
A seasoned mini golfer is trying to make par on a tricky hole #5. The golfer can complete the hole by hitting the ball from the
1. 2 answers
2. asked by Mike
3. 2,013 views
For the lewis structure of BCl3, does it have a total of 24 valence electrons? Also does it have a total of 4 bonds? If possible
1. 9 answers
2. asked by Anonymous
3. 1,943 views
a class consists of 24 boys and 16 girls.the average weight of the class is 41.7 kg,and the average weight of the boys is 41.1
1. 2 answers
2. asked by wan
3. 1,936 views
A pilot of an airplane flying at 12,000 feet sights a water tower. The angle of depression to the base of the tower is 25°.
1. 1 answer
2. asked by Peter
3. 1,923 views
a projectile shot at an angle of 60 degrees above the horizontal strikes a building 80 ft away at a point 48 ft above the point
1. 2 answers
2. asked by rhea
3. 1,920 views
Balance this chemical equation.Cr2O7 2-(aq) + Cu(s)---> Cr3+(aq) +Cu2+aq) I don't understand how to do this problem. Where do i
1. 1 answer
2. asked by MARY
3. 1,650 views
Linearly polarized light is incident on a piece of polarizing material. What is the ratio of the transmitted light intensity to
1. 1 answer
2. asked by Alex
3. 1,562 views
A water trough is 6 m long, and its cross-section has the shape of an isosceles trapezoid that is 20 cm wide at the bottom, 50
1. 1 answer
2. asked by Abrich
3. 1,515 views
Neutron stars consist only of neutrons and have unbelievably high densities. A typical mass and radius for a neutron star might
1. 2 answers
2. asked by StressedStudent
3. 1,440 views
Predict how changes effects equilibrium for N2(g) + 3H2(g) -----> 2NH3(g) + heata. add heat b. remove heat c. add NH3(g) d.
1. 2 answers
2. asked by Boo Boo
3. 1,316 views
The winning team's score in 11 high school basketball games were recorded. If the sample mean is 9.5 points and sample standard
1. 1 answer
2. asked by Christi
3. 1,275 views
what is the heat capacity of iron when a 15.75-g piece of iron absorbs 1086.75 joules of heat energy, and it's temperature
1. 1 answer
2. asked by ryan
3. 1,251 views
A rocket is launched at an angle of 56.0° above the horizontal with an initial speed of 103 m/s. It moves for 3.00 s along its
1. 1 answer
2. asked by Confused
3. 1,179 views
An FM radio station broadcasts at 82.3MHz. Determine the period of the radio waves.I already go the answer: 1.22×10-8 s but
1. 1 answer
2. asked by rory
3. 1,139 views
A block with mass m = 2.00 kg is placed against a spring on a frictionless incline with angle θ=30.0° (see figure). The block
1. 0 answers
2. asked by Andreea
3. 1,120 views
A. random sample of 50 four year olds attending daycare centers provided a yearly tuition average of 3987$ and the population
1. 1 answer
2. asked by Tessa
3. 1,115 views
At what temperature would you expect dinitrogen pentoxide to sublime?N2O5(s)-->N2O5(g) N2O5(s)= DELTA H -43.1 N2O5(s)= S
1. 1 answer
2. asked by MARY
3. 1,097 views
the max # of grams of K that can be obtained from 100.grams of KHCO3?
1. 1 answer
2. asked by mary
3. 1,089 views
You come home after dark, and porch light is out. You cannot tell which key opens the door.. you randomly try the 5 keys on your
1. 1 answer
2. asked by Angie
3. 1,076 views
in the number 288, explain how the value represented by the digit in the tens place is related to the value represented by the
1. 2 answers
2. asked by heather
3. 1,060 views
as she pick up her riders a bus driver traverses four successive displacements represented by the expression (-6.30 b)i-(4.00 b
1. 5 answers
2. asked by JOAN
3. 1,044 views
Consider a cube of an unknown material. When heated by 10 K, each side expands by 1%. Using *only this information*, what is the
1. 1 answer
2. asked by StressedStudent
3. 1,042 views
A solution of silver nitrate is mixed with a solution of potassium sulphide.Write the molecular,total ionic,and net ionic
1. 0 answers
2. asked by Shane
3. 953 views
What is the difference between "Findings and Analysis"?And do I need to quote a lot in the findings section?
1. 1 answer
2. asked by Jules
3. 940 views
a circular ink-blot grows at a rate of 2 sq cm per second. find the rate at which the radius is increasing after (28/11)seconds.
1. 4 answers
2. asked by edward
3. 936 views
A sealed can is filled completely with methyl alcohol. Which of these materials could the can be made of so that it would not
1. 0 answers
2. asked by StressedStudent
3. 927 views
Electromagnetic waves can form standing waves. In a standing wave pattern formed from microwaves, the distance between a node
1. 0 answers
2. asked by Alex
3. 926 views
In the old days, people thought that their souls left their bodies when they sneezed. They were worried that their souls might
1. 1 answer
2. asked by rfvv
3. 924 views
50 ml of Argon is collected at 60.0 degree C and 820.0 torr how much this sample weigh in grams?
1. 5 answers
2. asked by Andrew78
3. 898 views
A random sample of 80 students at a largae school shows an average grade of 72 in Algebra with a standard deviation of 4. Find
1. 1 answer
2. asked by Pearl
3. 870 views
Speding time volunteering at the local food bank and agreeing to be part of the office group-walk for caharity are examle of1.
1. 1 answer
2. asked by Regina
3. 838 views
differentiate x^2ex^2 W.R TO X
1. 1 answer
2. asked by John
3. 820 views
Random samples of size n are selected from a normal population whose standard deviation is know to be 2. Suppose you want 90% of
1. 0 answers
2. asked by joe
3. 819 views
Suppose we have an urn with 10 white balls and 6 red balls, and we create an experiment by randomly selecting 6 balls from the
1. 2 answers
2. asked by Em
3. 792 views
crystal structure of cesium chloride (CsCl).1)Identify the crystal system: Cubic Tetragonal Orthorhombic Rhombohedral Hexagonal
1. 2 answers
2. asked by selly
3. 788 views
A snapshot graph of a travelling wave is shown. The wave is travelling to the right at 18.2m/s. What is the amplitude if the
1. 0 answers
2. asked by joane
3. 785 views
@20*C solubility - 22g CuSO4 / 100g H2O@40*C solubility - 42g CuSO4 / 100g H2O which is saturated and unsaturated a. @20*C is 6g
1. 1 answer
2. asked by Boo Boo
3. 775 views
Tell whether the lines for each pair of equations are parallel, perpendicular, or neither.x + 5y = –20 y = –7/8x – 1 32x
1. 2 answers
2. asked by Deborah
3. 771 views
Osvaldo Dragun in his story Historia del hombre que se convirtio un perro: what is the conflict that the protagonist feels
1. 1 answer
2. asked by Anna
3. 764 views
Bernie invested a sum of money 8 yr ago in a savings account, which has since paid interest at the rate of 3%/year, compounded
1. 1 answer
2. asked by Britney
3. 746 views
Each of the following is a confidence interval for u = true average(population mean) resonance frequency (Hz) for all tennis
1. 0 answers
2. asked by joe
3. 721 views
A runner is 22 km east and 15 km south of his starting point, how long would it take him to return to his starting point in a
1. 2 answers
2. asked by Olivia
3. 720 views
Which of the following is not a secondary sex characteristic.....1. !@#$%^ 2. pubic hair 3. adams apple 4. facial hair My answer
1. 0 answers
2. asked by Regina
3. 713 views
Te arch of the Sydeny Harbor Bridge can be modeled by y= -0.00211x^2 + 1.06x where x is the distance (in meters) from the left
1. 0 answers
2. asked by Julia
3. 696 views
The small mass m sliding without friction along a looped track is to remain on the track at all times, even at the very top of
1. 0 answers
2. asked by Emma
3. 690 views
amphetamine (c9h13n) is a powerful stimulant. what is the percent composition of all of the elements in this compound?A.
1. 2 answers
2. asked by drew
3. 689 views
Calculate the volume of gas you would expect to be evoleved if X mol of magnesium were reacted with an excess of HCl at standard
1. 1 answer
2. asked by Stephanie
3. 688 views
Name the following crystallographic features below using proper crystallographic notation.Image One [2ˉ21] [1ˉ12ˉ]
1. 6 answers
2. asked by Odesa
3. 685 views
Each of the following is a confidence interval for u = true average(population mean) resonance frequency (Hz) for all tennis
1. 0 answers
2. asked by joe
3. 682 views
A circular coil (980 turns, radius = 0.078 m) is rotating in a uniform magnetic field. At t = 0 s, the normal to the coil is
1. 0 answers
2. asked by johnathan
3. 662 views
a stock solution of perchloric acid is 75.5% perchloric acid and has a density of 1.67g/ml. What is the molarity of the
1. 1 answer
2. asked by Michelle
3. 649 views
a spinner is spun whose central angles are all 45 degrees. #'s 1-8 on wheel. What is the probability that it lands on 5 if you
1. 1 answer
2. asked by Angie
3. 641 views
A charity organization is collecting change to raise monay. They have collected twice as many dimes as quarters, 22 more nickels
1. 1 answer
2. asked by stephy
3. 633 views
I am pressed for time and need this assignment done by Sunday please. The language used is Java. I have attatched both
1. 1 answer
2. asked by Nyeel
3. 616 views
An object is located 16.8 cm in front of a convex mirror, the image being 11.5 cm behind the mirror. A second object, twice as
1. 0 answers
2. asked by Alex
3. 607 views
The dance company has a $10 cover charge, an average of 200 people will attend. For each $0.25 increase in admission price, the
1. 1 answer
2. asked by Please help me
3. 599 views
The Columbus Zoo conducts a study to determine whether a household’s income can be used to predict the amount of money the
1. 0 answers
2. asked by Rae
3. 577 views
solve the following exponential equation. use exact answers only.not sure how to put it into the equation but it is 2 then 1-9x
1. 1 answer
2. asked by Heather
3. 566 views
A runner is 22 km east and 15 km south of his starting point. How far is he in a direct line from his starting point?
1. 8 answers
2. asked by Olivia
3. 564 views
A square piece of canvas measuring 10 ft. by 10 ft. is to be used to make a pup tent with open ends as shown. How long should
1. 1 answer
2. asked by NF
3. 562 views
The sound intensity of 1.2x10-12J/m2s is the threshold of hearing for humans. What is the amplitude of the motion of the air
1. 0 answers
2. asked by rory
3. 554 views
A wave has angular frequency 46.2rad/s and wavelength 3.57m. What is its wave number?b).What is its wave speed?
1. 1 answer
2. asked by joane
3. 547 views
How many mL of a 0.5M Ca(OH)2 solution are needed to neutralize 38mL of a 2M HNO3 solution?
1. 1 answer
2. asked by Boo Boo
3. 547 views
how many liters of oxygen can be produced at stp from the decomp. of .25 liters of 3M H2O2 ACCORDING TO THE REACTION 2H2O-2
1. 1 answer
2. asked by chris
3. 545 views
This is an assesment question and im really bad at these, i did the first two questions and now i am stuck.They ask you to
1. 3 answers
2. asked by Tara
3. 544 views
One side of a rectangle is longer than the other side by 1cm. If the area is 30cm, find its perimeter.
1. 1 answer
2. asked by Vanessa
3. 541 views
how does aluminum's position on the periodic table relate to its properties? i mean like how does it effect it's properties?than
1. 1 answer
2. asked by Samantha
3. 538 views
How do we solve this problem?If possible change each comparison of red paint to white paint to a % comparison.If ot os not
1. 0 answers
2. asked by Savana
3. 536 views
a 10 kg weight is on an inclined plane. 10 ft long and 6 ft high. if there is no friction, what force parallel to the plane will
1. 1 answer
2. asked by hurd
3. 535 views
A merchant makes two raisin nut mixtures.Each box of mixture A contains 9 ounces of peanuts and 2 ounces of raisins, and sells
1. 0 answers
2. asked by Jenny
3. 533 views
The wave is travelling to the right at 18.2m/s. What is the amplitude if the maximum displacement is 19.9cm and the total
1. 0 answers
2. asked by joane
3. 531 views
After hearing about some possible causes of sneezing, a scientist decides that room fresheners are the most common cause. What
1. 0 answers
2. asked by Regina
3. 527 views
find the domain of the composite function fog.f(x)= 2/x-3; g(x)= 7/x please show all work.
1. 0 answers
2. asked by Heather
3. 518 views
The mapping is f:N →N, given by F(n)= 2n^3=1,n belongs to N.A. one-one and onto B. onto not one-one C. one-one not onto D.
1. 1 answer
2. asked by sharan
3. 514 views
1. You should not take on the task because you have to spend a lot of time on it.2. You should not take the task because you
1. 1 answer
2. asked by rfvv
3. 514 views
Tell whether the lines for each pair of equations are parallel, perpendicular, or neither.y = –1/4x + 10 –2x + 8y = 6
1. 1 answer
2. asked by Deborah
3. 511 views
For the following system of equations, what is the x-value of the solution?–x + 2y = 6 6y = x + 18 A.-18 B.0 C.-6 D.3 I think
1. 2 answers
2. asked by Deborah
3. 511 views
How should I start of a one page written assignment on the marketing failure of a company? What should the first paragraph
1. 4 answers
2. asked by Kayla
3. 511 views
A microphone has an area of 3.0cm^2. It receives during a 6.00s time period a sound energy of 1.0x10-11J. What is the intensity
1. 0 answers
2. asked by sarah
3. 509 views
the entrance fee to the zoo is $3,and to get into the gardens is $2.A ticket to get into both is $4. One day 900 people were at
1. 1 answer
2. asked by WAN
3. 507 views
Find the present value of $31,000 due in 4 yr at the given rate of interest.(a) 6%/year, compounded quarterly $ ? (b) 3%/year,
1. 1 answer
2. asked by Amanda
3. 501 views
what is the name of the ions that are formed when the following compounds dissolve in water. (a) BaBr2 (b) (NH4)2CrO4 (c)HBr
1. 1 answer
2. asked by Shane
3. 497 views
The margin of error is:a. the difference between the point estimate and the true value of the population parameter b. the
1. 0 answers
2. asked by Tracy
3. 491 views
Publishers records state:20% of books published break even. 30% lose $1000. 25% lose $10,000. 25% earn 20,000. When a book is
1. 0 answers
2. asked by Angie
3. 491 views
3C3H8 + 20H2CrO4-->9CO2 + 10 Cr2O3 + 32H2OWhat mass of chromium (III) oxide will be formed by complete reaction of 1.50g of
1. 2 answers
2. asked by Michelle
3. 487 views
In a laboratory experiment 259 ml of gas was collectedd over water at 24 degree C and 752 torr. Calculate the volume, that the
1. 1 answer
2. asked by byke
3. 484 views

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