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College Chemistry
A sample of an iron alloy contains 92.1g Fe, 2.59g C, and 1.59g Cr. Calculate the percent by mass of each component present in the alloy sample.
Monday, April 16, 2012 at 5:09pm

Math
Nico was stunned when he opened the mail. Here was a check for $322.50! This was the interest he earned on his investment. One year ago Nico had been given $5,000. His parents made him put it in the bank and save it for college, but they said he could keep the interest it ...
Monday, April 16, 2012 at 4:40pm

college algebra
a cub measures n inches on each edge. If a slice 1 inch thick is cut from one face of the cube and then a slice 3 inches thick is cut from another face of the cube, the resulting solid has a volume of 1560 cubic inches. Find the dimensions of the original cube.
Monday, April 16, 2012 at 2:45pm

college algebra
A propane tank has the shape of a circular cylinder with a hemisphere at each end. The cylinder is 6 feet long and volume of the tank is 5pie cubic feet. Find, to the nearest thousandth of a foot the length of the radius x.
Monday, April 16, 2012 at 2:38pm

College Math
Consider the following expression. 3(x-2)-9(x^+7x+4)-5(x+8)
Monday, April 16, 2012 at 2:31pm

College Math
The "learning curve" describes the rate at which a person learns certain tasks. If a person sets a goal of typing N words per minute (wpm), the length of time t (in days) to achieve this goal is given by the following formula. t=62.5ln(1-N/80) (a) According to this ...
Monday, April 16, 2012 at 2:19pm

College Math
A seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 5.3 102 µm. Find this earthquake's magnitude on the Richter scale. (Round your answer to the nearest tenth.)
Monday, April 16, 2012 at 2:16pm

College Math
An artifact was found and tested for its carbon-14 content. If 88% of the original carbon-14 was still present, what is its probable age (to the nearest 100 years)? Use that carbon-14 has a half-life of 5,730 years.
Monday, April 16, 2012 at 2:14pm

college chemistry
Lithium metal decomposes in water and releases hydrogen gas. if 275 ml of hydrogen gas is produced at stp. what is the mass of lithium that reacted ? Li(s)+H2O(l)=LiOH(aq)+H2(g)
Sunday, April 15, 2012 at 10:59pm

College Chem 1010
Which of the following compounds is insoluble? Question 4 options: A) Ca(NO3)2 B) FePO4 C) NH4OH D) Na2SO4 E) NaCl
Sunday, April 15, 2012 at 10:48pm

Reposting Chemistry College
Based on the balanced equation 4Na + O2 → 2Na2O calculate the number of Na2O formula units formed when 60 Na atoms and 10 O2 molecules react? Thanks.
Sunday, April 15, 2012 at 8:34pm

College Chem
Based on the balanced equation 4Na + O2 → 2Na2O calculate the number of Na2O formula units formed when 60 Na atoms and 10 O2 molecules react? Thanks.
Sunday, April 15, 2012 at 7:34pm

college chemistry
The solvay process in an industrial method for preparing baking soda. In the process, CO2, NH3, H2O, and NaCl react to produce NaHCO3. If 25.0 L of carbon dioxide gas at STP and 20.0 L of ammonia gas at STP react in excess water and salt, what is the mass of baking soda ...
Sunday, April 15, 2012 at 6:18pm

physics - college
An unmarked police car traveling a constant 95km/h is passed by a speeder traveling 14km/h .Precisely 2.50s after the speeder passes, the police officer steps on the accelerator; if the police car's acceleration is 2.30m/s^2 , how much time passes before the police car ...
Sunday, April 15, 2012 at 5:50pm

college physics 44
An unmarked police car traveling a constant 95km/h is passed by a speeder traveling 14km/h .Precisely 2.50s after the speeder passes, the police officer steps on the accelerator; if the police car's acceleration is 2.30m/s^2 , how much time passes before the police car ...
Sunday, April 15, 2012 at 4:38pm

COLLEGE CALCULUS. HELP!
the fundamental theorem of calculus, f(x)=∫(0,x) t^3+2t^2+2dt, and find f"(x). my answer was: f'(x)=x^3+x^2+2 f"(x)=x^4/4 + 2x^3/3 + 2x it said its wrong.
Sunday, April 15, 2012 at 2:52am

COLLEGE CALCULUS. HELP!
Evaluate the definite integral ∫(0,2) (x-1)^25 dx.. thats how i got stuck u=x-1, then du=dx =∫(0,2) u^25du =(1/26)u^26. i dont know what to do with integral (2,0)..
Saturday, April 14, 2012 at 3:07am

Trig/PreCalc
Teach me how to express 5sqrt3 - 5i in polar form please. I don't want you to do the work for me. Just show me the steps I need to do the work properly on my own. Otherwise I will not pass this class or the exam when I enter college, and I do not want to retake PreCalc. ...
Friday, April 13, 2012 at 3:44pm

College Comp II
What is the meaning & how did you figure it out? thanks March for a One Man Band by David Wagoner He’s *a boom a blat* in the uniform Of an army *tweedledy* band *a toot* Complete with medals *a honk* cornet Against *a thump* one side of his lips And the other stuck with...
Thursday, April 12, 2012 at 8:45pm

College physics
A 0.006 00-kg bullet traveling horizontally with a speed of 1.00 x 10^3 m/s enters an 20.1-kg door, imbedding itself 10.9 cm from the side opposite the hinges as in the figure below. The 1.00-m wide door is free to swing on its frictionless hinges. At what angular speed does ...
Wednesday, April 11, 2012 at 1:40pm

College Algebra
Annual profit in thousands of dollars is given by the function, P(x) = -.1x^2 + 50x - 300, where x is the number of items sold , x >= 0. 1.describe the meaning of the number -.1 in the formula. 2.describe the meaning of the number -300 in the formula. 3.find the profit for ...
Monday, April 9, 2012 at 9:00pm

College Physics
A 1.70 kg object attached to a spring moves without friction and is driven by an external force given by F = (3.00 N) sin(2πt). (a) If the force constant of the spring is 20.0 N/m, determine the period. _____s For this one I tried 2*pi*sqrt(1.7/20) but it said my answer ...
Monday, April 9, 2012 at 8:38pm

Consumer math
When Greg was born, his grandmother put $5000 in a savings account for his college expenses. It was compounded at 2.5 percent semiannually, and left in the account 18 years. How much was in the account? Round to the nearest dollar.
Monday, April 9, 2012 at 10:21am

Statistics
I'm going over some practice problems and I can't seem to figure this one out. Can anybody give me some help please? On a measure of artistic ability, the mean for college students in New Zealand is 150 and the standard deviation is 25. Give the Z scores for New ...
Monday, April 9, 2012 at 1:36am

Math 1330
In a survey of 1000 eligible voters selected at random, it was found that 200 had a college degree. Additionally, it was found that 90% of those who had a college degree voted in the last presidential election, whereas 47% of the people who did not have a college degree voted ...
Monday, April 9, 2012 at 12:07am

college chem
A sample of 8.00 L of NH3 (ammonia) gas at 22 degrees and 735 torr is bubbled into a 0.500 L solution of 0.400 M HCl (hydrochloric acid). The Kb value for HCl is 1.8x10^-5. Assuming all the NH3 dissolves and that the volume of the solution remains at 0.500 L, calculate the pH ...
Sunday, April 8, 2012 at 7:31pm

College Physics
A 40 kg child is standing on the edge of a merry-go-round in a playground. Before they were deemed too dangerous, these were quite common. They were just huge rotating platforms you could sit on while someone spun you around in uniform circular motion until you screamed in ...
Sunday, April 8, 2012 at 6:23pm

College Physics 2056
An electromagnetic wave strikes a 3.00-cm2 section of wall perpendicularly. The rms value of the wave's magnetic field is determined to be 6.00 10-4 T. How long does it take for the wave to deliver 1000 J of energy to the wall?
Sunday, April 8, 2012 at 12:24am

Chemistry
From data below, calculate the total heat (J) needed to convert 0.172 mol of gaseous ethanol (C2H6O) at 351° C and 1 atm to liquid ethanol at 25.0° C and 1 atm. Boiling point at 1 atm 78.5°C c gas 1.43 J/g · °C c liquid 2.45 J/g · °C ΔH&...
Saturday, April 7, 2012 at 6:01pm

College Physics
A radio station with a power of 20 kW sends out an omnidirectional wave at 1.25 MHz. a. If the electromagnetic wave has an electric field of 0.22 V/m, what is the magnetic field amplitude? b. What is the intensity of the wave at 5 km? c. What is the wavelength of the ...
Wednesday, April 4, 2012 at 9:25pm

College algebra
I need a step by step explaination of the example in my book. Find the domain of f(x)=(7x)/(x-8)
Wednesday, April 4, 2012 at 1:05pm

College Chemistry
A mixture of the compounds sodium oxide and magnesium chloride contains 2.4182 g of sodium oxide and is 89.3 % by mass magnesium chloride. The sodium oxide is 74.200 % by mass sodium. Calculate the moles of oxygen in the mixture. Thanks in advance.
Wednesday, April 4, 2012 at 12:18am

basic college mathematics
mechanic charges $35.00 an hour plus parts to fix a car, if the parts cost $90,00 dallars and it took 5 hours to do the job, what is the tolal cost of the repair
Monday, April 2, 2012 at 6:25pm

College Algebra
The height of a box is 3cm less than the width. The length is 2cm less than the width. The volume is 50cm^3. what is the width of the box?
Monday, April 2, 2012 at 1:19pm

writing
Which of the followinh is Not an example of persuasive writing? a position paper from an elected official a college admissions essay a movie review a summary of a textbook reading assessment (answer) Which of the following is a hasty generalization? Playing football gives you ...
Sunday, April 1, 2012 at 11:50pm

MATH HELP
At Jefferson College 15% of all students participate in athletics. If a class consists of 33 randomly selected students, how many of them would you expect to participate in athletics?
Sunday, April 1, 2012 at 6:20pm

finance
Weighted Average Cost of Capital)As a member of the Finance Department of Ranch Manufacturing, your supervisor has asked you to compute the appropriate discount rate to use when evaluating the purchase of new packaging equipment for the plant. Under the assumption that the ...
Saturday, March 31, 2012 at 4:38pm

narayana junior college,physics
a point charge q=-8.0nC is located at origin . find electric field vector at point x=1.2m,y=-1.6m
Saturday, March 31, 2012 at 10:01am

NARAYANA JUNIOR COLLEGE .PHYSICS
2 PARTICLES [FREE TO MOVE] WITH CHARGES +q and +4q are a distance L APART. A 3RD CHARGE IS PLACED SO THAT THE ENTIRE SYSTEM IS IN EQ2UILIBRIUM.FIND THE LOCATION,MAGNITUDE AND SIGN OF THE 3RD CHARGE
Saturday, March 31, 2012 at 9:03am

COLLEGE CALCULUS. HELP!
anti-derivation given f"(x)=3x+0 and f'(-1)=1 and f(-1)=5 find f'(x)=? and find f(2)
Friday, March 30, 2012 at 6:11pm

College Chemistry
A stock solution is prepared by adding 20mL of 0.2M Na3PO4 to enough water to make 80mL. What is the Na+ concentration of 20mL of the stock solution? I am thinking .012: a) .02 times .2 = .004 b).004 times 3 = .012 (for each Na in the molecule) Seems too simple
Thursday, March 29, 2012 at 7:58pm

English
I urgently need you to help me express the following sentence. Thank you. 1) In the past my daughter has suffered from a disease called oxyuriasis which can affect a person's intestine. I'll give her the proper medication in case she develops/contracts/catches this ...
Thursday, March 29, 2012 at 3:33pm

computer science
You have been working for the XYZ Computer Corporation as an entry-level software engineering since you graduated from college last May. You have done very well so far; you are respected by management, well liked by your fellow employees , and have been assigned to a team of ...
Thursday, March 29, 2012 at 12:08pm

Economics
How might earning a college degree increase lifetime earnings and employability?
Wednesday, March 28, 2012 at 10:36pm

College Physics
An electron with a speed of 1.9 × 107 m/s moves horizontally into a region where a constant vertical force of 5.4 × 10-16 N acts on it. The mass of the electron is 9.11 × 10-31 kg. Determine the vertical distance the electron is deflected during the time it ...
Wednesday, March 28, 2012 at 7:02pm

College Health Law
Following an automobile accident, a 16-year old boy who had recently escaped from a detention center was brought to the hospital emergency department by ambulance. The patient seemed to be alert and claimed to be suffering withdrawal symptoms from a drug habit. The patient ...
Wednesday, March 28, 2012 at 6:26pm

ALGEBRA
SOLVE IN LINEAR EQUATION? A university bookstore recently sold a wirebound graph paper notebook for $1.08, and a college ruled notebook for $3.12.At the start of the spring semester, a combination of 50 of these notebooks were sold for a total of $88.68 .How much of each type ...
Wednesday, March 28, 2012 at 3:51pm

Economics
Aside from humanitarian concerns, which of the following is one reason on nation is motivated to provivde foreign aid to a less developed country? A. Foreign aid is tax deductible B. The nation providing foreign aid decreases its unemployment. C. The nation providing foreign ...
Wednesday, March 28, 2012 at 2:12pm

college statistic and algebra
1.suppose that the demand forecast indicate that 1800 units of the product can be sold. the fixed cost is $3,000, the variable cost is $2 for each unit product and selling price $10 per unit. the decision to produce and sell 1800 units in a projected profit of? 2. what is the...
Wednesday, March 28, 2012 at 11:39am

college algebra
Determine the principal P that must be invested at rate r = 3 1 2 %, compounded monthly, so that $700,000 will be available for retirement in t = 13 years. (Round your answer to the nearest cent.) P = $
Wednesday, March 28, 2012 at 11:29am

English
Hi I'm doing a mla research paper for my college English class. My topic is What is Lupus? I having a difficult time coming up with a thesis for this topic. If anybody has any ideas please respond. Thanks
Wednesday, March 28, 2012 at 10:32am

Transistion to College Math
A rifle bullet is fired vertically with initial speed 490 m/s. how long does it take the bullet to reach its greatest height?
Wednesday, March 28, 2012 at 2:27am

statistics
Suppose that SAT scores among U.S. college students are normally distributed with a mean of 450 and a standard deviation of 150. What is the probability that a randomly selected individual from this population has an SAT score at or below 600?
Tuesday, March 27, 2012 at 6:44pm

College physics
Consider the two situations. In the first a machine must pull a box up a rough slope at constant speed. The mass of the box is 800 kg, the coefficient of kinetic friction is 0.2, and the slope is inclined at 15 degrees to the horizontal. In the second situation the machine ...
Tuesday, March 27, 2012 at 1:09pm

College Chemistry
In a reaction vessel, the following reaction was carried out using 0.250 mol of NH3(l) and 0.100 mol of N2(g). 4NH3(l) + N2(g) ¡ú 3N2H4(l) Which of the following represents the composition in moles in the vessel when the reaction reaches completion? ¡Ö0...
Monday, March 26, 2012 at 9:23pm

College Chemistry
Consider the following reaction. 3Ca(s) + N2(g) ¨ Ca3N2(s) What is the theoretical yield in grams for the reaction if 10.50 g of calcium reacts with 5.50 g of N2?
Monday, March 26, 2012 at 9:22pm

College Chemistry
The maximum amount of product D that can be produced from the following reaction is 55.75 g. 2A + B ¨ 2C + 3D Following an experiment based on this reaction, when the D was isolated, 50.67 g of D were obtained. What is the percent yield for this particular experiment?
Monday, March 26, 2012 at 9:22pm

College Chemistry
Consider the reaction. 4Fe(s) + 3O2(g) ¨ 2Fe2O3(s) If 0.500 mol of Fe reacts with 0.400 mol of O2, what are the limiting reactant and the theoretical yield in moles of Fe2O3 for the reaction, respectively?
Monday, March 26, 2012 at 9:21pm

College Chemistry
Animals break down glucose (C6H12O6) as a source of energy according to the following overall reaction. C6H12O6(aq) + 6O2(g) ¨ 6CO2(g) + 6H2O(l) What mass in grams of CO2(g) is produced from the reaction of 15.0 g of glucose?
Monday, March 26, 2012 at 9:21pm

College Chemistry
For the following reaction: A + 3B ¨ 4C Which of the following provides the direct link between the amount of reactant A and the amount of product C?
Monday, March 26, 2012 at 9:20pm

College Chemistry
Consider the following symbolic reaction in which the hypothetical elements hearts (¢¾) and diamonds (♦) react to produce the compound spades (¢¼). ¢¾ ¢¾ ¢¾ ¢¾ + ♦ ¡æ ¢¼...
Monday, March 26, 2012 at 9:19pm

College Chemistry
Consider the following reaction that occurs when natural gas is burned. CH4(g) + 2O2(g) ¨ CO2(g) + 2H2O(g) How many moles of water are produced when 6.2 mol of methane are burned? Assume that there is more than enough oxygen present.
Monday, March 26, 2012 at 9:18pm

College Math
A spherical balloon has a radius of 9 centimeters. Find the amount of air required to fill the balloon. Round to the nearest hundredth
Monday, March 26, 2012 at 5:00pm

College Physics
A 1.75-kg wooden block rests on a table over a large hole as in the figure below. A 4.60-g bullet with an initial velocity vi is fired upward into the bottom of the block and remains in the block after the collision. The block and bullet rise to a maximum height of 24.0 cm. ...
Monday, March 26, 2012 at 12:57pm

Statistics
A social psychologist asked 15 college students how many times they "fell in love" before they were 11 years old. The numbers of times were as follows: 2,0,6,0,3,1,0,4,9,0,5,6,1,0,2 make (a) a frequency table and (b) a histogram. Then describe the general shape of ...
Monday, March 26, 2012 at 1:07am

college physics
A 0.50-kg block slides along a small track with elevated ends and a flat central part. The flat part has a length L = 1.85 m. The curved portions of the track are frictionless, but for the flat part the coefficient of kinetic friction is 0.103. The block is released from rest ...
Sunday, March 25, 2012 at 11:35pm

child psychology
I still need help with this question Which young adult is at risk of long term identity foreclosure or diffusion? A. A college graduate who switces majors B. An aspiring chef who has no opportunity for culinary training. C.A young woman with several possible vocational choices...
Sunday, March 25, 2012 at 10:07pm

COLLEGE ALGEBRA
An investment of $63,000 was made by a business club. The investment was split into three parts and lasted one year. The first part of the investment earned 8% interest, the second 6% and the third 9%. Total interest from the investments was $4950. The interest from the ...
Sunday, March 25, 2012 at 9:01pm

Statistics
A study is being planned to estimate the mean number of semester hours taken by students at a college. The population standard deviation is assumed to be o=4.7 hours. How many students should be included in the sample to be 99% confident that the sample mean is within one ...
Sunday, March 25, 2012 at 2:31am

math
the heights of 1000 students in a college are normally distributed with a mean 5'10" and a SD of 2". Use 68% for the region from the mean to 1-SD on either side; 94% for the region from the mean to 2-SD on ether side and 98% for the region from the mean to 3-SD ...
Saturday, March 24, 2012 at 9:44am

child psychology
which young adult is long-term identitity foreclosure or diffusion A. college graduate who switches majors B.An aspiring chef who has no opportunity for culinary training. C.A young woman with several possible vocational choices. D.A peace corps volunteer. My choice is D. Am I...
Friday, March 23, 2012 at 10:02pm

statistics
At a small college it is known from previous years that 35% of all college freshman start in college algebra. The new freshman class has 100 students in it, What is the probability that between 35 and 42 freshman will start in college algebra? Is it reasonable to approximate ...
Friday, March 23, 2012 at 11:36am

College Physic
2) A car traveling with 5 m/s encounters a deer. The drivers slams on the breaks, the breaks lock. The car skids to a complete stop on the road ahead (and the deer runs away). Why does the car stop (where does all the kinetic energy it had go)? Find the magnitude of the ...
Friday, March 23, 2012 at 1:52am

Algebra
A university bookstore recently sold a wirebound graph paper notebook for $1.08, and a college ruled notebook for $3.12.At the start of the spring semester, a combination of 50 of these notebooks were sold for a total of $88.68 .How much of each type were sold?
Thursday, March 22, 2012 at 12:55pm

College Physics
suppose the two cars are headed in the same direction. A 1200kg car travels at 65 mph and a 1000kg car travels at 75mph. The faster car rear-ends the slower car and their bumpers catch so that they continue moving after the collision at the same speed. Use the concepts above ...
Thursday, March 22, 2012 at 12:12pm

College Algebra
The illumination produced by a light source is inversely proportional to the square of the distance to the source. If a light source 5m from an object illuminates with 70 candela, what illumination would be produce if the object were mover to 12 m away? not sure how to set ...
Wednesday, March 21, 2012 at 8:43pm

statistics
Musical styles other than rock and pop are becoming more popular. A survey of college students finds that 48% like country music, 30% like gospel music, and 10% like both. What is the conditional probability (±0.01) that a student likes gospel music, given that he or ...
Wednesday, March 21, 2012 at 12:36pm

college Algebra
If y varies directly as x^2 and y=20 when x=4, find y when x=7?
Wednesday, March 21, 2012 at 9:51am

College Algebra
if y vaires directly as x^2 and y=20 when x=4, find y when x=7?
Wednesday, March 21, 2012 at 9:50am

college algebra
if y vaires directly as x^2 and y=20 when x=4, find y when x=7? I got 61.25 but was not sure if it was correct...
Tuesday, March 20, 2012 at 8:08pm

alg 1 college
can you guys please help me wwith a math problem, its asking to solve this equatoion, sqare root5x-4=3x-18. to fkire off first 5x-4= 3x-18 squared. foil thatand you are looking AT 9x squared -54x -54x+324/ add the -54 to 108x.then shoot the 5x to to the 108x and subbtract 5x ...
Tuesday, March 20, 2012 at 2:21pm

Math
For a poll, 60 students were selected at random from the 6000 students at Calgon Community College. It turns out that 12 were in favor of higher parking fees to support extra police patrols of parking lots on campus. In this example, the sample proportion is:
Tuesday, March 20, 2012 at 12:59am

STATISTICS
Suppose that, for students who are enrolled in college algebra, 78 percent are freshmen, 40 percent are female, and 28 percent are female and are freshmen. Your answers below should be entered as decimals and rounded to three decimal places. (a) One student will be selected at...
Monday, March 19, 2012 at 10:28pm

Books
are Dean Koontz books appropriate for 12 year olds?- even if he/she is an advanced reader that read college book?
Monday, March 19, 2012 at 8:27pm

Mystery Fiction
What is a good mystery fiction book for adults (college level or adult)?
Monday, March 19, 2012 at 7:35pm

english
F. Scott Fitzgerald dropped out of college to
Monday, March 19, 2012 at 7:11pm

statistics
Suppose that, for students who are enrolled in college algebra, 73 percent are freshmen, 48 percent are female, and 31 percent are female and are freshmen. Your answers below should be entered as decimals and rounded to three decimal places. Two students will be independently ...
Monday, March 19, 2012 at 2:15pm

college physics
An 82.0 kg skydiver jumps out of a balloon at an altitude of 1 500 m and opens the parachute at an altitude of 195 m. (a) Assuming that the total retarding force on the diver is constant at 55.0 N with the parachute closed and constant at 3 600 N with the parachute open, what ...
Monday, March 19, 2012 at 2:03pm

college algebra
a rectangular box has a volume of V(x)=x^3+13x^2+50x+56 cubic inches. The height of the box is x+7 inches. The width of the box is x+4 inches. Find the length of the box in terms of x.
Sunday, March 18, 2012 at 9:59pm

algebra college
multiply and simplify 3^-2-3^6
Sunday, March 18, 2012 at 7:11pm

college algebra
what is the domain and range of f(x)=5^-x +5
Saturday, March 17, 2012 at 6:38pm

College Physics
A 42-kg girl is bouncing on a trampoline. During a certain interval after leaving the surface of the trampoline, her kinetic energy decreases to 220 J from 460 J. How high does she rise during this interval? Neglect air resistance. Just wondering how to solve this.
Friday, March 16, 2012 at 11:26pm

college math
Let p represent the statement, "Jim plays football", and let q represent "Michael plays basketball". Convert the compound statements into symbols.
Friday, March 16, 2012 at 2:06am

college math
construct a truth table for (p ^ q) <--> ~q and submit it to the dropbox
Friday, March 16, 2012 at 1:59am

math analysis
how many faculty of each rank should be hired at each college to exactly meet the demand for sections and completely exhaust the salary budget Rank table. Lecture. Instrutor Section taught. 3. 4 annual salary. 20. 25 (Thousands $) Table. Community college 1. 2. 3 demand for ...
Thursday, March 15, 2012 at 11:39pm

College Physics
Two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. The orbital speeds of the planets are determined to be 43.5 km/s and 54.0 km/s. The slower planet's orbital period is 6.53 years. (a) What is the mass of the star? (b) What ...
Thursday, March 15, 2012 at 10:22pm

College Physics
A skier is pulled up a slope at a constant velocity by a tow bar. The slope is inclined at 28.2 ° with respect to the horizontal. The force applied to the skier by the tow bar is parallel to the slope. The skier's mass is 46.7 kg, and the coefficient of kinetic ...
Thursday, March 15, 2012 at 10:15pm

College Physics
A 45.7-g golf ball is driven from the tee with an initial speed of 46.0 m/s and rises to a height of 25.9 m. (a) Neglect air resistance and determine the kinetic energy of the ball at its highest point. (b) What is its speed when it is 6.82 m below its highest point?
Thursday, March 15, 2012 at 9:33pm

College Physics
A 42-kg girl is bouncing on a trampoline. During a certain interval after leaving the surface of the trampoline, her kinetic energy decreases to 220 J from 460 J. How high does she rise during this interval? Neglect air resistance. The quarter is over but I am still trying to ...
Thursday, March 15, 2012 at 8:24pm

algebra
At local community college, it costs $150 to enroll in a morning section of an algebra course. Suppose that the variable n stands for the number of students who enroll. Then 150n stands for the total amount of money collected for this course. How much is collected if 34 ...
Thursday, March 15, 2012 at 7:43pm

College Physics
A 22 turn circular coil of radius 5.00 cm and resistance 1.00 is placed in a magnetic field directed perpendicular to the plane of the coil. The magnitude of the magnetic field varies in time according to the expression B = 0.0100t + 0.0400t2, where t is in seconds and B is in...
Thursday, March 15, 2012 at 1:29am

College Physics - Acceleration
A 1470-kg submarine rises straight up towards the surface. Seawater exerts both an upward buoyant force of 16070 N on the sub, as well as a downward resistive force of 1050 N. What is the submarine's acceleration?
Wednesday, March 14, 2012 at 9:05pm

College Physics - Speed
Traveling at a speed of 15.6 m/s, the driver of an automobile suddenly locks the wheels by slamming on the brakes. The coefficient of kinetic friction between the tires and the road is 0.730. What is the speed of the automobile after 1.25 s have elapsed? Ignore the effects of ...
Wednesday, March 14, 2012 at 9:03pm

College Physics - Weight
A planet has a mass of 7.93 × 1023 kg and a radius of 2.58 × 106 m. (a) What is the acceleration due to gravity on this planet? (b) How much would a 67.0-kg person weigh on this planet?
Wednesday, March 14, 2012 at 8:58pm

College Physics
A bowling ball (mass = 4.4 kg, radius = 0.11 m) and a billiard ball (mass = 0.35 kg, radius = 0.028 m) may each be treated as uniform spheres. What is the magnitude of the maximum gravitational force that each can exert on the other? What equation should I use with this since ...
Wednesday, March 14, 2012 at 8:56pm

Statistics Question (Confidence Interval)
A sample of 15 recent college graduates found that starting salaries for attorneys in New York City had a mean of $102,342 and a standard deviation of $21,756. Construct a 95% confidence interval for the average starting salary of all attorneys in the city. A. (89869.82, ...
Wednesday, March 14, 2012 at 11:15am

St,gregory's college math
How can i divide 34by5 leaving answer in decimal
Tuesday, March 13, 2012 at 6:58pm

College Physics
It takes 164 kJ of work to accelerate a car from 23.7 m/s to 27.8 m/s. What is the car's mass? I tried using this equation but it didn't work KE = 1/2mv^2
Monday, March 12, 2012 at 10:16pm

Math
In which one of the following sentences is the number written correctly? A. One-hundred and thirty-two people lined up to buy the tickets B. John just paid $33 thousand for his new car C. The parcel of land was advetised a two hundred forty-three and three quarters acres D. ...
Monday, March 12, 2012 at 6:53pm

college math
1). Sum of three numbers is 45. One number is five more than the second number.It is also twice the third.Find the numbers. 2).Perimeter of quadrilateral is 52in. Longest side is is three times as long as the shortest side. The other two sides are equally long and are 5 in. ...
Sunday, March 11, 2012 at 8:26pm

HELP! College Physics
A skateboarder shoots off a ramp with a velocity of 6.7 m/s, directed at an angle of 59° above the horizontal. The end of the ramp is 1.1 m above the ground. Let the x axis be parallel to the ground, the +y direction be vertically upward, and take as the origin the point ...
Saturday, March 10, 2012 at 4:10pm

College Physics
(a) What is the magnitude of the average acceleration of a skier who, starting from rest, reaches a speed of 9.62 m/s when going down a slope for 4.00 s? (b) How far does the skier travel in this time?
Saturday, March 10, 2012 at 2:47pm

college Math
perform the indicated operation, give answer in scientific notation. (5x10^2)x(5.6x10^4)
Saturday, March 10, 2012 at 12:32pm

Literacy
2. Utilizing the publication search function on EDSeek's Home page, which of the following companies publishes Pediatric Nursing? A. Royal College of Nursing Publishing Company B. Elsevier Science Publishers C. Jannetti Publications, Inc. D. Advanstar Communications, Inc. ...
Saturday, March 10, 2012 at 2:10am

College Physics
A proton moves with a velocity of vector v = (6ihat - 1jhat + khat) m/s in a region in which the magnetic field is vector B = (ihat + 2jhat - 3khat) T. What is the magnitude of the magnetic force this charge experiences? answer in Newtons. I tried F=qvb but the vectors are ...
Saturday, March 10, 2012 at 1:48am

college math
boat travels 160 miles downstream in the same time that it takes to go 96 upstream. the pead of the stream is 6 mph. what is the speed of still water
Friday, March 9, 2012 at 4:57pm

college math
I am not understading the concept of this problem pleaase help. 5/22divided by 1/41 reduced to the lowest terms
Thursday, March 8, 2012 at 8:42pm

math
enrollment at a college has 8500 students enrolled, there aer 1/3students over 25 as there are under 25. how mant are over 25 how many are under 25
Thursday, March 8, 2012 at 8:04pm

college math
find the lest common denimator and add the fractions 1/125 plus 4/50
Thursday, March 8, 2012 at 7:53pm

college math
find the lest common denominatorfor 1/225 plus 4/50 and add the fractions
Thursday, March 8, 2012 at 7:48pm

college math
14/7 divided by 4/10 reduced to lowest terms
Thursday, March 8, 2012 at 7:38pm

college physics
a 1.0 N-weight is hanging at rest as shown. In each case, write in the magnitude of the unknown force. a) chain with a weight of 2.5 N has a 1.0 N hanging weight b) chain with a weight of .5 N has a 1.0 N hanging weight c) stretched elastic band with negligible weight has a 1....
Thursday, March 8, 2012 at 12:15pm

Catering(Gourmet Essentials)
THURSDAY March 8, 2012 SCHOOL SUBJECTS - Art - Business - Computers - English - Foreign Languages - Health - Home Economics - Math - Music - Physical Education - Science - Social Studies GRADE LEVELS - Preschool - Kindergarten - Elementary School - 1st Grade - 2nd Grade - 3rd...
Thursday, March 8, 2012 at 6:03am

statistics
Question Details The following data was collected to determine whether or not Monroe County College students work 18 hours per week: 20,22,25,12,30,49,10,30,17,15,0,24,20,22,23,20,25,24,30,12,15,29,0,25,2,40,30,0,33,0,45,30,38,48,0,40,20,0,0,24. a) Describe the ...
Thursday, March 8, 2012 at 3:47am

Calculus
Glenview Community College wants to build a rectangular parking lot on land bordered on one side by a highway. It has 380 feet of fencing to use on the other three sides. What should be the dimensions of the lot if the enclosed area is to be a maximum?
Thursday, March 8, 2012 at 3:33am

college algebra
3 = 4 ------------- x-8 x=2 how do you solve this
Wednesday, March 7, 2012 at 6:58am

College Algebra
Let U = {5, 6, 7, 8, 9, 10, 11, 12, 13, 14}, A = {6, 8, 10, 12}, B = {9, 13}, and C = {6, 9, 12, 13, 14}. List all the members of each of the sets. (a) (A ¿ B) ¿ C , (b) A ¿ B ¾ C
Tuesday, March 6, 2012 at 10:53am

College Physics Help
A thin rod (length = 1.10 m) is oriented vertically, with its bottom end attached to the floor by means of a frictionless hinge. The mass of the rod may be ignored, compared to the mass of the object fixed to the top of the rod. The rod, starting from rest, tips over and ...
Monday, March 5, 2012 at 7:04pm

College Physics
Some bacteria are propelled by motors that spin hair-like flagella. A typical bacterial motor turning at a constant angular velocity has a radius of 1.1x10-8m, and a tangential speed at the rim of 2.0x10-5 m/s. (a) What is the angular speed (the magnitude of the angular ...
Monday, March 5, 2012 at 6:55pm

Algebra
Consider the following apportionment problem for College Town. Suppose each council member is to represent approximately 2,500 citizens. Use the apportionment plan requested in the problem, assuming there must be 10 representatives. North: 5,500 South: 9,000 East: 6,400 West: ...
Monday, March 5, 2012 at 5:48pm

algebra
grandma ploan to finance her grandchilds college education she has 50,000 to invest use a long range investment pln ,cd,saving bond etc. the plan is to earn compound interest.the principal is(p)50,000 interest rate is (r)3.60years for investment is(6)this is time state number ...
Monday, March 5, 2012 at 3:29pm

College Physics
A 26.5 kg block (m1) is on a horizontal surface, connected to a 6.90 kg block (m2) by a massless string. The frictionless pulley has a radius R = 0.096 m and a moment of inertia I=0.080 kgm2 m2 is hanging straight down from the pulley over the edge of the surface. A force F = ...
Monday, March 5, 2012 at 12:19am

com/156
Part 2: Paraphrasing and Quoting Review the following passage and paraphrase the long passage in the following box. Use the reference to create an appropriate APA-formatted, in-text citation. Additionally, include one direct quotation. One of the most valuable skills a student...
Sunday, March 4, 2012 at 8:21pm

Probability
Thank you for the explanation MathMate! Would the answer to this question be A? Darby guesses the answers to six questions on the math portion of her college entrance exam. Each question is a true or false question. What is the approximate probability that at least 4 of her ...
Sunday, March 4, 2012 at 6:56pm

college algebra
solve the logarithmic equation. Please show all work. log5x+log5(x-3)=log5(x+5)
Sunday, March 4, 2012 at 4:33pm

college algebra
use properties of logarithms to find the exact value of the expression. sqrtlog81 3
Sunday, March 4, 2012 at 4:31pm

college algebra
solve the equation below. Please show all work. log3(x/2-9)=4
Sunday, March 4, 2012 at 4:29pm

Highline Community College
Suppose that the marginal revenue for a product is given by the following, where x is the number of units and revenue is in dollars. MR = −28 (2x + 2)2 + 28 Find the total revenue.
Sunday, March 4, 2012 at 4:23pm

Probability
Darby guesses the answers to six questions on the math portion of her college entrance exam. Each question is a true or false question. What is the approximate probability that at least 4 of her answers are correct? A. 0.23 B. 0.34 C. 0.66 D. 0.78 Explanation please??
Sunday, March 4, 2012 at 2:28pm

Math
Darby guesses the answers to six questions on the math portion of her college entrance exam. Each question is a true or false question. What is the approximate probability that at least 4 of her answers are correct? A. 0.23 B. 0.34 C. 0.66 D. 0.78
Sunday, March 4, 2012 at 1:42pm

writing paper
I need to add a cover page to my writing assinment. I can not find any information on what I include in the cover page. This is for Penn Foster College.
Sunday, March 4, 2012 at 9:38am

College Chem 2
which of the following has the highest buffer capacity? A 0.10M H2PO4-/0.10M HPO4 -2 B 0.50 M H2PO4-/0.10 M HPO 2- C 0.10 M H2PO4-/0.50 M HPO4 2- D 0.50 M H2PO4-/0.50M HPO4 2- E They all hae the same buffer capacity. There is a group of us working together.
Saturday, March 3, 2012 at 5:31pm

statistics
You and three (3) of your friends were in the same advance placement high school chemistry class in high school. All four (4) of you decided to take the same chemistry class together at the local university along with 21 other students. On the first day of class, the professor...
Saturday, March 3, 2012 at 3:29pm

College Chem 2
calculate the solunility of silver chromate, Ag2CrO4, in 0.005 M NA2CrO4- Ksp=2.6x10-12 Please help.....
Saturday, March 3, 2012 at 1:26pm

COLLEGE CALCULUS.
Use implicit differentiation to find the equation of the tangent line to the curve xy^3+xy=5 at the point (4,1) . The equation of this tangent line can be written in the form y = mx+b where m is:? and where b is:?
Friday, March 2, 2012 at 10:07pm

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