Questions Asked on
July 8, 2011

chemistry 101
Consider the following reaction. CaO (s) + CO2 (g) = CaCO3 (s) A chemist allows 14.4 g of CaO and 13.8 g of CO2 to react. When the reaction is finished, the chemist collects 19.4 g of CaCO3. Determine the limiting reactant, theoretical yield, and percent
asked by ABCD 
chemistry 101
How many grams of oxygen are in 40.1 g of calcium hydroxide? options: 17.3 g 8.64 g 20.1 g 0.541 g 11.2 g
asked by ABCD 
physics
A car traveling 95 km/h slows down at a constant 0.80 m/s^2 just by "letting up on the gas. A) Calculate the distance it travels during the second second. B) Calculate the distance it travels during ninth second.
asked by mike 
Physics
Two point charges are separated by 6cm. The attractive force between them is 22 N. Find the force between them when they are separated by 12 cm.
asked by Sarabeth 
Chemistry
A quantity of gas weighing 7.10g at 741 torr and 44 degrees C occupies a volume of 5.40 L. What is its molar mass?
asked by Sade 
chemistry 101
How many moles of oxygen are in 3.45 mol of diphosphorus pentoxide? options: 5.75 mol O 13.5 mol O 6.90 mol O 3.45 mol O 17.3 mol O
asked by ABCD 
Physics
A ball (mass m = 250 g) on the end of an ideal string is moving in circular motion as a conical pendulum as in the gure. The length L of the string is 1.67 m and the angle with the vertical is 37 degrees A) What is the magnitude of the angular momentum (kg
asked by jhay 
Sentance patterns
I have to match the following sentances to the sentance patterns listed 1.Visiting old mine shafts can be an interesting experience. 2.Remodeling this house has become very expensive. 3.The old village sprawled across the green valley. 4.Academic success
asked by Eddie 
social studies  history
what was unusual about the landholding policy in the vancouver colony? and why would immigrants from Canada object to such a policy?
asked by Cloey 
Trigonometry
log3(x^2)=2log3(4)4log3(5)
asked by Kali 
Statistics
M&M plain candies come in various colors. According to the M&M/Mars Department of Consumer Affairs, the distribution of colors for plain M&M candies is as follows. Color Purple Yellow Red Orange Green Blue Brown Percentage 18% 19% 21% 9% 9% 6% 18% Suppose
asked by Anonymous 
physical science
The speed of light is 3 „e 108 m/s (300,000,000 m/s). Red light has a wavelength of 7 „e 107 m (0.0000007 m). What is its frequency?
asked by wendell 
physics
A tuning fork produces a wave at 280 Hz and with a wavelength of 1.5 m. Calculate its velocity.
asked by wendell 
Statistics
On a very short quiz, there is one multiple choice question with 5 possible choices (a, b, c, d, e) and one true or false question. Assume you are taking the quiz but do not have any idea what the correct answer is to either question. You mark an answer to
asked by Cassie 
Analytical chemistry
What is the reaction & calculation when KIO3 mixed with KI, HCl by titration with Na2S2O3?
asked by Selim 
accounting
Jan. 1 Purchased a small company and recorded goodwill of $150,000. Its useful life is indefinite. May 1 Purchased for $90,000 a patent with an estimated useful life of 5 years and a legal life of 20 years
asked by stacey 
physics
An entertainer juggles balls while doing other activities. In one act, she throws a ball vertically upward, and while it is in the air, she runs to and from a table 5.20m away at a constant speed of 2.40m/s, returning just in time to catch the falling
asked by izzy 
Math Calculus
Let C(x) = 0.02x^3 + 55x^2 + 1380. Find the minimum average cost for this commodity. I got to the point where I got x=1374.98, x=5.018, x=5 but what do I have to do again after this? Because I am missing some steps after I find x. Do i have to plug all
asked by Megan 
chemistry 101
Lakes that have been acidified by acid rain can be neutralized by the addition of limestone (CaCO3). How much limestone in kilograms would be required to completely neutralize a 5.2 x 109 L lake containing 5.0 x 103 g of H2SO4 per liter?
asked by ABCD 
chemistry 101
How many molecules of oxygen are produced from the decomposition of 8.75 g of hydrogen peroxide in the following equation Mg + H2O2 > MgH2 + O2 options: 8.75 x 1024 6.02 x 1023 1.55 x 1022 5.27 x 1024 1.55 x 1023
asked by ABCD 
chemistry 101
Determine the empirical and molecular formula for a compound made from 54.09% calcium, 2.72% hydrogen, and 43.18% oxygen with a total molar mass of 222.3 g.
asked by ABCD 
chemistry 101
Calculate the empirical formula for the following compound: potassium tartrate found in baking powder: 20.8% K, 2.7% H, 25.5% C, and 51.0% O
asked by ABCD 
Computer Science  MATLAB
One interesting property of a Fibonacci sequence is that the ratio of the values of adjacent members of the sequence approach a number called “the golden ratio” or PHI. Create a program that accepts the first two numbers of a Fibonacci sequence as a
asked by George 
the colony of Vancouver Island to 1858
why did the British Government grant a trade monopoly to the HBC on Vancouver Island ? i really cannot find the answer :/
asked by Jasmin 
chemistry 101
Given the following dissolving process: Fe2(SO4)3 (s) = 2Fe3+ (aq) + 3SO42 (aq) How many grams of iron (III) ions are produced when 0.450 moles of sulfate ion are produced? options: 50.3 g 16.8 g 50.3 g 37.7 g 75.4 g
asked by ABCD 
Shawn
How many milliliters of 0.355 M NaF solution are needed to react completely with 24.6 mL of 0.216 M CaCl2 solution? How many grams of CaF2 will be formed? The reaction is CaCl2(aq) + 2NaF(aq) → CaF2(s) + 2NaCl(aq)
asked by Chemistry 
Math
A firecracker is launched straight up, and its height is a function of time, h(t)= 14^2 + 112t, where h is the height in feet and t is the time in seconds with t=0 corresponding to the instant it launches. What is the height 5 seconds after launch? What
asked by Tim 
algebra II
The profit made when t units are sold, t>0, is given P=t²36t+320. Determine the number of units to be sold in order for P>0 (a profit is made).
asked by HELP 
System of Linear Equations
A manufacturer produces three types of radios: deluxe, standard and economy. Each radio uses three different types of transistors: P, Q and R. The deluxe radio uses 2 P's, 7 Q's and 1 R. The standard contains 2 P's, 3 Q's and 1 R, and the economy model
asked by neeha 
linear programming
A manufacturer has a maximum of 240, 360, and 180 kilograms of wood, plastic and steel available. The company produces two products, A and B. Each unit of A requires 1, 3 and 2 kilograms of wood, plastic and steel respectively; each unit of B requires 3, 4
asked by nmh 
value of money
You want to have $1,000,000 in your bank account when you turn 65 years old. Today is your 20th birthday. As a birthday present you received $27,000 and you want to invest this amount. At what annual interest rate must you achieve to realize this goal?
asked by nmh 
calculus
A rectangular aquarium is to be built with an open top (no material needed) and a square base. You have 60 square feet of material to build it with. (We are assuming that the sides and bottom are perfectly flat). What is the maximum volume that this
asked by Megan 
linear programming
Maximize z = 16x + 8y subject to: 2x + y ≤ 30 x + 2y ≤ 24 x ≥ 0 y ≥ 0 Graph the feasibility region. Identify all applicable corner points of the feasibility region. Find the point(s) (x,y) that maximizes the objective function z = 16x + 8y.
asked by nmh 
linear programming
A company is planning to purchase and store two items, gadgets and widgets. Each gadget costs $2.00 and occupies 2 square meters of floor space; each widget costs $3.00 and occupies 1 square meter of floor space. $1,200 is available for purchasing these
asked by nmh 
physics
A space shuttle is launched from rest. It takes 8.00 to reach 155 km/s, and at the end of the first 1.00 km/s its speed is 1550 . What is the average acceleration (in m/s) of the shuttle during the first 8.00 s?
asked by izzy 
System of Linear Equations
A manufacturer produces three types of radios: deluxe, standard and economy. Each radio uses three different types of transistors: P, Q and R. The deluxe radio uses 2 P's, 7 Q's and 1 R. The standard contains 2 P's, 3 Q's and 1 R, and the economy model
asked by neeha 
physics
a force of 4 N acts on a body of mass 2 kg for 4 sec . assuming the body to be initialy at rest . find the distance covered in 10sec after force start acting
asked by Anonymous 
college math
Using correct mathematical notation and symbols, express the following in setbuilder notation: Z = {16, 17, 18, 19, 20}
asked by jenna 
physics
A helicopter is ascending vertically with a speed of 5.20 m/s. At a height of 120 m above the Earth, a package is dropped from a window. How much time does it take for the package to reach the ground? [Hint: v_0 for the package equals the speed of the
asked by vicky 
Economics
Equilibrium is defined as the price at which the quantity demanded and the quantity supplied are equal. In the short run, equilibrium does not always occur. What terms describe disequilibrium? How is subsequent equilibrium reestablished
asked by alphonso 
math
A manufacturer makes two products A and B, each of which is processed in two departments, production and finishing. Each A takes 3 hours to produce and six hours to finish, whereas each B takes 5 hours to produce and 2 hours to finish. How many units of A
asked by tina 
Math
Expand the following binomials to look for patterns when expanding binomials. Try to find a pattern that will allow you to expand binomials without carrying out all of the steps. (x + 2)3 (2x+1)4 (2x1)4 (2x2)3
asked by Joey 
linear equations
A manufacturer makes two products A and B, each of which is processed in two departments, production and finishing. Each A takes 3 hours to produce and six hours to finish, whereas each B takes 5 hours to produce and 2 hours to finish. How many units of A
asked by nmh 
linear programming
A feed company is developing a feed supplement from two grains A and B. Each kilogram of A contains 0.3 grams of protein and 0.2 grams of carbohydrates; each kilogram of B contains 0.9 grams of protein and 0.1 grams of carbohydrates. There must be at least
asked by nmh 
value of money
Find the compound amount if $6,400 is invested for 2 years at 12% compounded monthly. What difference would compounding daily make in this example?
asked by nmh 
Computer Science  MATLAB
I guess it was skipped One interesting property of a Fibonacci sequence is that the ratio of the values of adjacent members of the sequence approach a number called “the golden ratio” or PHI. Create a program that accepts the first two numbers of a
asked by George 
calculus
Solve the equation 2x^3 + 3x^2  6x  4 = 0, giving the result to four decimal places
asked by amit 
System of Linear Equations
A manufacturer makes two products A and B, each of which is processed in two departments, production and finishing. Each A takes 3 hours to produce and six hours to finish, whereas each B takes 5 hours to produce and 2 hours to finish. How many units of A
asked by neeha 
PLEASE ANSWER math
What is the numeric value of $10.25?
asked by suvy 
Mathtrig.
1)sinx+cosx=1 2)sinx+cosx=1+sin2x
asked by lisa 
mathtrigon.
[1sin^2(alfa+beta)]/cos^2(alfa+beta)
asked by lisa 
maths
if two interior angles on the same side of a transversal intersecting two parallel lines are in the ratio 2:3,then the smaller of two angles is
asked by sakina 
Micoreconomics
In recent years, the Internet auction firm eBay has sougth to make its auction technology the favorite of software programmers, and it has begun licensing its technology to other Web sites. The company's managers have pulicly stated that their goal is for
asked by Tina 
MATH
Halley's comet appears in the sky approximately once every 77 years. If the comet was seen in by Astronomer Edmund Halley in 1531. How many times has the comet been spotted since?
asked by Kate 
Geometry
A car dealership interviewed every driver who came onto their lot on Tuesday. This produced the following results: there were 34 people who owned trucks and 59 people who owned cars. If 19 people owned both a truck and a car and 7 people owned neither, how
asked by Anonymous 
Math
Ice Dreams finds its profit from the sale of ice cream increases by $30 per week during the 9 weeks of student summer holidays. Find the profit for the summer season if the profit for the first week of the summer is $100.
asked by Bob 
linear programming
Minimize z = 3x + 6y subject to: 4x + y ≥ 20 x + y ≤ 20 x + y ≥ 10 x ≥ 0 y ≥ 0 Graph the feasibility region. Identify all applicable corner points of the feasibility region. Find the point(s) (x,y) that minimizes the objective function z = 3x +
asked by nmh 
chemistry 101
What is the coefficient for aluminum after the following equation is balanced: Al(s) + O2(g) > Al2O3(s) options: 2 4 1 3 0
asked by ABCD 
chemistry
How many grams of HCl are needed to change 1000 L of water with a pH of 11 to a pH of 5.5?
asked by Kate 
Physics
consider a cart being pulled up an inclined plane by a student during a Physics lab. The applied force on the cart is 18 N is directed parallel to the incline to cause the cart to be displaced parallel to the incline for a given displacement of 0.7 m. The
asked by Allison 
Trigonometry
v=2(ab+bc+ca), solve for a
asked by Kali 
Probability
according to a poll 14% Americans have tattoos. Find the odds that an American has a tattoo?
asked by Anonymous 
algebra 2
If Q varies inversely as the square root of R and Q=2 when R=4, what is Q when R is 25? does Q=625 im not sure can someone double check it for me.
asked by tom 
value of money
Deposits of $1,000, $1,100 and $680 were made into a savings account, the first two years ago, the second 18 months ago, the third 6 months ago. How much is in the account now if the interest on all deposits is 12% compounded semiannually?
asked by nmh 
value of money
A deposit of $2,000 earns interest at a rate of 14% compounded quarterly. After two and a half years the interest rate changes to 13.5% compounded monthly. How much is in the account after six years?
asked by nmh 
value of money
Which is a better rate of interest, 16% compounded quarterly or 16 1/4% compounded semiannually?
asked by nmh 
value of money
At what annual nominal rate of interest will $6,900 earn $6,400 interest in five years?
asked by nmh 
Resources For Educating Young Children, Part 1
I have a few more questions to ask they are 1. Mike becomes angry when he can’t solve a mathematical problem, and slams his book down on the desk. Since his behaviour is disruptive to his classmates, you wish to devise a scale by which you can gauge the
asked by beth 
math
how the distance between centre of circle if: x^2+y^2+2x2y11=0 and x^2+y^24x+6y17=0
asked by elsa 
physical science
the moderate temperatures of islands throughout the world has much to do with waters: A. hgih evaporation rate. B. vast supply of thermal enerygy. C. poor conductivity D.high specific heat capacity.
asked by haley 
math
which is the odd one out? 16 36 64 27 81
asked by mia 
math
The slope of a line that is perpendicular to a line whose slope is 2/7 is
asked by leah 
math
Indicate the equation of the line that is the perpendicular bisector of the segment with endpoints (4, 1) and (2, 5).
asked by leah 
geometry
Indicate the equation of the line through (2, 4) and having slope of 3/5.
asked by katie 6 
algebra 2
what is the range of the function F(x)= (x+2)^2+3 A. y
asked by dalena 
Math
According to a 2008 poll 14% Americans have tattoos. Find the odds that an American has a tattoo? (I got probability of 14/100) 1  14/100 then 86/100 X 11/14 ***odds American has a tattoo 7:43*** did I work this problem correctly
asked by Shay 
economics
company A plans to purchase a packaging machine worth 5 million to further fast and up the packaging of their product brand X. the purchase is intended to boost up the loosing sale of the said product which makes 10000 per year. the target of the company
asked by melissa 
math
give an example that demonstrates how much money you are will to spend if I want to spend no less than 6000 and no more than 10000,
asked by Bernadine 
ATTN: Reiny
How do you write in correct set notation?
asked by Jen 
System of Linear Equations
A medical supply company has 1150 workerhours for production, maintenance, and inspection. Using this and other factors, the number of hours used for each operation, P, M, and I, respectively, is found by solving the following system of equations. Find P,
asked by neeha 
MATH
1) During the two months of the summer holiday, you find a summer job that pays $160 per week with a $10 a week raise. How much money will be made by the end of the summer? 2 Your grandmother offers you $1 on the first day of March break and offers to
asked by BEN 
Physics
consider a cart being pulled up an inclined plane by a student during a Physics lab. The applied force on the cart is 18 N is directed parallel to the incline to cause the cart to be displaced parallel to the incline for a given displacement of 0.7 m. The
asked by Allison 
Math Calculus
A sphere is initially measured as having a radius of 4 inches. A subsequent measurement shows that the radius is really 3.99. Find (a) the actual difference in volume between the initial measurement and the correction, and (b) the difference as estimated
asked by Megan 
Composition and Communication
Identify three key strategies to ensure you will choose words correctly in the future to improve your writing.
asked by Kiki 
Math
32% of Americans age 2529 have a tattoo. Find the odss that a 2529 year old american does not have a tattoo? I used the formula p(no tattoo)/p(tattoo) and got the answer 13.7
asked by Anonymous 
MathCan u help me Reiny? So confused :(
A car dealership interviewed every driver who came onto their lot on Tuesday. This produced the following results: there were 34 people who owned trucks and 59 people who owned cars. If 19 people owned both a truck and a car and 7 people owned neither, how
asked by Jen 
algebra
The cost, in millions of dollars, to remove x % of pollution in a lake modeled by c=6,000/2002x What is the cost to remove 75% of the pollutant? I am so lost, there are other percents if someone can show me this one I can figure out the other questions.
asked by daytripper 
maths
If E the universal set contains all rectangles of length x and breadth y, where x and y are integers and x>y. A contains rectangles with area of 24m2 B contains rectangles , each with length multiples of 3 and area of 24m2. Find n(A), n(B), and n(A ^B)
asked by Fatima 
algrebra 2
can someone please help me im stumped on these two. use analytical methods to solve the equation. 1+(1/x)=(42/x²) (7/x4)=1+(9/x+4)
asked by tom 
algebra
a ramp rises 2.3 ft vertically and 14.8 ft horizontally express the slope
asked by melissa 
composition and communication II
I don't know how to answer this question. What strategies will I use to overcome challenges of writing a paper?
asked by Jamie 
anthropology
how same sex marriage define neo evolution theory.
asked by ami 
Math
2x^33x^28x2
asked by Sivesh 
Math
What is the numeric value of 10.25?
asked by suvy 
maths
how do u write 7th july 2011 in 5 letters without using numbers?
asked by sushil 
algebra
Can someone please help me? Thanks! simplify the following expression, and rewrite it in an equivalent form with positive exponents(4x^2)^2
asked by Jellie 
algebra
how do you subtract 7.9 from 21
asked by deedee 
Algebra 2
v=2(ab+bc+cd) for a
asked by Kali 
new arthistory submission 26
Compare and contrast Bauhaus and the International Style..
asked by SOLANAH 
matematica
como formar tres numeros diferentes com mais de 22 dezenas e menos de 24 dezenas
asked by A 
Math Calculus
The foot of a 30foot ladder is being pulled away from a vertical wall at a rate of 1 foot per minute. When the top of the ladder is 6 feet from the ground, at what rate is the top of the ladder moving down the wall?
asked by Meg 
College math 115
I need help with my assignment how much will it be to have someone help me with it it is due by tomorrow?
asked by Jennifer 
chemistry
How many grams of acetic acid (MW = 60 g/mol, pKa=4.75) are needed to change 1000 L of water with a pH of 11 to a pH of 5.5?
asked by Kate 
Math
Given A = {1, 2, 3}, B = {3, 4, 5, 6,}, and C = {3, 5, 7}. Evaluate each set a) A ∩ B b) A U C c) B U C d) (A U B) ∩ C e) A U (B U C) f) (A ∩ B) ∩ C g) (A ∩ B) U C
asked by Jenna 
math
Given the following sets, select the statement below that is NOT true. A = {b, l, a, z, e, r}, B = {b, a, l, e}, C = {a, b, l, e}, D = {l, a, b}, E = {a, b, l} a.) E ⊆ A b.) C ⊆ B c.) D ⊆ C d.) D ⊂ B e.) C ⊂ B
asked by jesse 
Algebra 1
Can someone help me do this problem? (The square root of x squared minus 11) + 1 = x.
asked by Andrew 
linear programming
A manufacturer produces two items, bookcases and library tables. Each item requires processing in each of two departments. Department I has 40 hours available and department II has 36 hours available each week for production. To manufacture a bookcase
asked by nmh 
value of money
Billy Burnett's grandfather willed Billy $10,000 payable on his twentyfirst birthday. What will be the value of the bequest when Billy reaches 17 years of age if money is worth 8% compounded semiannually?
asked by nmh 
value of money
Suppose you had three different offers for your used car. One person will give you $1,000 right now, another offers $1,200 six months from now and the other offers $1,600 two years from now. If interest is 16% compounded quarterly, which offer is worth the
asked by nmh 
value of money
At 16% compounded quarterly, how long would it take for money to triple?
asked by nmh 
calculus
Let f(x)= 4x(x+3)^2  (x+3)^3 and find the values of x that correspond to f(x)=0.
asked by Gary 
soc 207
Discuss the concept of environmental justice; support your discussion with at least one example.
asked by tamika 
english
the subject and verb should agree even when other words come between them. For example: “The students, as well as their teacher, are excited about the upcoming trip to Italy.”
asked by kellie pricley 
communication and Composition II
I have to identify three challenges that might arise when writing a paper. I have read the chapters and can't find the answers can you help me?
asked by Jamie