Thursday
May 5, 2016

# Posts by jo

Total # Posts: 440

Calculus
A balloon is rising vertically above a level, straight road at a constant rate of 1 foot/second. Just when the balloon is 65 feet above the ground, a bicycle passes under it going 17 feet/sec. How fast is the distance between the bicycle and balloon increasing 3 seconds later?
October 25, 2011

Calculus
A particle is moving along the curve whose equation is (xy^3)/(1+y^2)= 8/5. Assume the x-coordinate is increasing at the rate of 6 units/second when the particle is at the point (1,2). At what rate is the y-coordinate of the point changing at that instant? Is it rising or ...
October 25, 2011

Physics
An autographed baseball rolls off of a 0.85 m high desk and strikes the floor 0.68 m away from the desk. How fast was it rolling on the desk before it fell off? The acceleration of gravity is 9.81 m/s2 . Answer in units of m/s
October 24, 2011

Physics
In a portable deﬁbrillator, energy is stored in a capacitor charged to a high potential diﬀerence. The capacitor is discharged through the patient’s body in a short, high-powered pulse. a) The capacitor in a portable deﬁbrillator is charged to 5000 V ...
October 5, 2011

statistics
given the following population data, x=17,13,23,15,19,19,21,28 calculate the z score value for a score of 18.
September 19, 2011

math
what is the rule for input 36 output 9 input 17 output 9 input 24 output1 input 18 output 0
September 13, 2011

maths
When Sandy decreased her savings by 75% and Gene increased hers by 40%, they would save \$280 each. What were their total savings at first?
September 8, 2011

maths
Amy had 20% more money than John. After she spent 50% of her money, she had \$72 less than John. How much money had she left?
September 8, 2011

Maths
At present, the ratio of Ann's age to Pamela's age is 4:3. Six yrs ago, their total age was 72yrs. what is Pamela's presnt age?
September 8, 2011

Maths P5
Mr Neo has fewer than 200 sweets. He wants to give his class an equal number of sweets. If he gives each pupil 3 sweets, he will have 70 left over. If he gives 5 sweets, he will need 10 more sweets. How many pupils are there in the class? How many sweets does Mr Neo have?
August 21, 2011

Maths P5
Cindy went to the store with just enough money to buy 11 files.However, she bought only 8 files and spent the rest of her money on 24 pens and rulers. The ratio of the number of pens to rulers was 3:5. Each ruler costs \$0.80. Each pen costs \$0.40 more than a ruler.How much did...
August 21, 2011

Maths P5
Daniel, Susan and Rick bought some cookies to sell. The cookies were sold at 6 for \$2. Daniel sold 1/4 of the cookies. Susan sold 2/7 as many cookies as Rick. Daniel and Susan sold a total of 120 cookies. a)How many cookies did they sell altogether? b)How much did they collect...
August 21, 2011

maths
there are 15 guppies, 14 angelfish and 5 goldfish in a tank. how many guppies and goldfish must be added so that the ratio of guppies to angelfish to goldfish is 9:7:5
August 20, 2011

Maths
60% of the people on a bus are male. After 1/3 of the males alighted from the bus, what percentage of the people left on the bus are females?
August 20, 2011

statics
test 55%answer correct 44 correct answers how many questions on test
August 8, 2011

chem
why is hexane known as hydrocarbon?
July 20, 2011

alegbra
what is 6y square -5y -2??
June 21, 2011

spanish
I need someone to edit a spanish article for me. I can just email it to you if you leave your email here. Thanks!
June 7, 2011

chemestry
A gas is contained in a metal cylinder with a piston, so that the volume of the cylinder can change. If the gas initially occupies volume of 664 ml at 471 mmHg, what will be the volume if the temperature is kept constant and the pressure is changed to 408 mmHg?
May 17, 2011

math
Please help! :) Garden measures 30x20 Border has a width of x (I've already solved the first part of my problem, in that the width is 3) Border needs to be covered to a depth of 3 inches. Pine bark costs \$29 per cubic yard. What will the material cost to lay the pine bark ...
May 10, 2011

math
Please help! :) Garden measures 30x20 Border has a width of x (I've already solved the first part of my problem, in that the width is 3) Border needs to be covered to a depth of 3 inches. Pine bark costs \$29 per cubic yard. What will the material cost to lay the pine bark ...
May 10, 2011

Algebra
How do you graph 2 equations and then find the common area on the graph?
May 4, 2011

computer science
in mobile phone network how many times as strong would a signal be expected to be at 200 m from a base station, compare with at 600 m? is it 81 or 9 or 3 or 0.3 or 0.1 or 0.01
April 6, 2011

chemistry
This is almost correct, except it should be (s)(2s+.15)^2=Ksp
March 21, 2011

Chemistry
Balance this equation: Cu + H+(aq) + NO3-(aq) -- Cu2+(aq) + NO2 + H2O
March 21, 2011

Math
determine if the given function is one-to-one. if it is, find the inverse. f(x) = 8x - 4 A) f-1(x) = x+4 / 8 B) f-1(x) = x-4 / 8 C) Not one-to-one D) f-1(x) = x/8 + 4
March 6, 2011

maths
a pyramid has a spuare base with side length 20.a right circular cylinder has a diameter of 10 and a length of 10.the cylinder is lying on its side,completely inside the pyramid.the central axis of the cylinder lies parallel to and directly above a diagonal of the pyramids ...
March 6, 2011

math
how do I solve (.5x?)-1.4=.85
March 1, 2011

psych
Language Paper (12 points): This paper should be posted as a Word attachment in the Assignment Section and should be consistent with APA guidelines. Prepare a 1050 to 1400-word paper in which you examine language as it relates to cognition. Address the following: o Define ...
February 14, 2011

math
106.76 square meters
February 14, 2011

Science
a truck that weighs 19500 kg is moving at a velocity of 17 m/s west what is the trucks momentum? My answer: 1147.05...
February 11, 2011

health
List 3 word elements and examples in health field?
February 10, 2011

the facility
the director of a child care program may allow a care give to take a day or two rer year
February 1, 2011

accounting
how can I solve this problem stockholders invest \$25,000 cash in the corporation
February 1, 2011

Physics
im not asking for help graphing. im asking which would go on x axis and which would go on y axis
January 31, 2011

Physics
create a graph with your data of rotational speed vs radius. independent variable goes on x axis. which is x axis and which is y axis out of radius and rotational speed
January 31, 2011

Math
nevermind i figured out y= -1 but how would you graph x+3=0
January 24, 2011

Math
x+3=0 how do you graph that? y= -1 how would you graph that?
January 24, 2011

marketing
what special advantages and potential problems did 3m have in introducing a new highlighter with flags product for college students in 2004
January 24, 2011

math
Explain how you could show five less than a number using an expression?
January 10, 2011

Literature
How do you think a Puritan writer such as Anne bradstreet might have responded to the ideas presented in a psalm of life
December 14, 2010

history
president hoover's overall plan to deal with the great depression was to?
December 14, 2010

Physics
forces of 185N and 245N act east and south respectively on an 80 kg mass.If the force of friction is ZERO , find the accleration of the mass.
December 9, 2010

chemistry
what is the molarity of an unknown HCI concentration if it requires 75ml of a 0.2 M NaOH solution?
December 1, 2010

chemistry
The environmental protection agency (EPA) wanted to study the particular materials in the atmosphere in Bogus Basin at 7200 ft elevation. The sampled air rate was at 1.00 liter per minute and was allowed to run 24 hours per day for 30 days. At the end of the month the filter ...
December 1, 2010

Baking
I have a recipe for a Tunnel of SugarPlum cake. It calls for a small pky of frosting mix (Jiffy). This is no longer available here. I have researched other Tunnel recipes on the web. They also call for the frosting mix. HELP PLEASE. How and what can I substitute for this item?
November 27, 2010

math
If a single fair die is rolled, find the probability of a 4 given that the number rolled is odd.
November 25, 2010

com/156
what is the main point of process analysis in writing? Why are four basic steps of process analysis important? what happens if you skip a step?
November 15, 2010

Physics
An 8.74-kg block slides with an initial speed of 1.52 m/s down a ramp inclined at an angle of 27.0° with the horizontal. The coefficient of kinetic friction between the block and the ramp is 0.64. Use energy conservation to find the distance the block slides before coming ...
November 11, 2010

accounting
A company that uses perpetual inventory system made the following cash purchases and sales: January 1 Purchased 100 units at \$10 per unit. February 5: Purchased 60 units at \$12 per unit. March 16: Sold 40 units for \$16 per unit. Prepare general journal entries to reord the ...
October 31, 2010

accounting
A company purchased 1000 units of inventory on September 25 and the cost per unit was \$8.50. Terms of the purchase were 2/10, n/30. The invoice was paid in full on October 4. (Assume a perpetual inventory system). Prepare the journal entries to fully reflect these merchandise ...
October 31, 2010

phy
Is the string massless? If the string is of mass per unit length p, then we will get tension as a function of height. However, if the string is massless, the tension in the string will simply equal the force that the box puts on it. Draw a force diagram. That's how you ...
October 24, 2010

physics
Two identical cars are traveling at the same speed. One is heading due east and the other due north, as the drawing show. What is true regarding the kinetic energies and momenta of the cars?
October 23, 2010

economics
Two people enter a bus. Two adjacent cramped seats are free. Each person must decide whether to sit or stand. Sitting alone is more comfortable than sitting next to the other person, whihc is more comfortable than standing. a.) Suppose that each person only cares about her own...
October 21, 2010

physics
just a couple more questions 1.) The power needed to accelerate a projectile from rest to is launch speed v in a time t is 43.0 W. How much power is needed to accelerate the same projectile from rest to launch speed of 2v in a time of 1/2t? 2.)A ball is fixed to the end of a ...
October 21, 2010

physics
just a couple more questions 1.) The power needed to accelerate a projectile from rest to is launch speed v in a time t is 43.0 W. How much power is needed to accelerate the same projectile from rest to launch speed of 2v in a time of 1/2t? 2.)A ball is fixed to the end of a ...
October 20, 2010

physics
just a couple more questions 1.) The power needed to accelerate a projectile from rest to is launch speed v in a time t is 43.0 W. How much power is needed to accelerate the same projectile from rest to launch speed of 2v in a time of 1/2t? 2.)A ball is fixed to the end of a ...
October 20, 2010

physics
thank you for answering this and the other one
October 20, 2010

physics
1.)The apparent weight of a passenger in an elevator is greater than his true weight? Why is that? 2.) The radius of larger circle is twice that of a small circle. Two identical stones are attached to cords that are being whirled on a table top at the same speed. How would the...
October 20, 2010

Chemistry
Organic hydrogenation reactions, in which H2 and an "unsaturated" organic compound combine, are used in the food, fuel, and polymer industries. In the simplest case, ethene (C2H4) and H2 form ethane (C2H6). If 124 kJ is given off per mole of C2H4 reacting, how much ...
October 19, 2010

physics
Two cars are traveling at the same constant speed v. Car A is moving along a straight section of the road, while B is rounding a circular turn. Which statement is true about the acceleration of the cars? a.) acceleration of both cars is zero b.) car A is accelerating but car B...
October 19, 2010

economics
For anyone with experience working with game theories... 1.) Two animals are fighting over some prey. Each can be passive or aggressive. Each prefers to be aggressive if its opponent is passive, and passive if its opponent is aggressive; given its own stance, it prefers the ...
October 17, 2010

economics (game theory)
For anyone with experience working with game theories... 1.) Two animals are fighting over some prey. Each can be passive or aggressive. Each prefers to be aggressive if its opponent is passive, and passive if its opponent is aggressive; given its own stance, it prefers the ...
October 17, 2010

physics
Here were two tricky questions. Please provide steps. Answers are not necessary (since these are practice questions for an exam). 1.) The centrifuge is a device in which a small container of material is rotated at a high speed on a circular path. Such a device is used in ...
October 16, 2010

physics
Here were two tricky questions. Please provide steps. Answers are not necessary (since these are practice questions for an exam). 1.) The centrifuge is a device in which a small container of material is rotated at a high speed on a circular path. Such a device is used in ...
October 16, 2010

calculus
Find the equation of the tangent line to the graph of f(x)=4x^3-1x^2+1 at x=-2.
October 12, 2010

chemistry
1,3,4,6
October 12, 2010

math
what is the dependent variable in math
October 4, 2010

com/155
include a discussion of sentence variety and the rhythm of the author's writing about Individuals can be denied credit for a number of reasons.
September 26, 2010

physics
How do we tell if an object is in free fall?
September 19, 2010

physics
Here's a physics problem. I dont care about the answer, i just want to know how to do it. dont have to be too detailed.. but i dont really kno how to start this 1.) A model rocket blasts off from the ground rising straight upward with a constant acceleration that has a ...
September 18, 2010

physics
Here's a physics problem. I dont care about the answer, i just want to know how to do it. dont have to be too detailed.. but i dont really kno how to start this 1.) A model rocket blasts off from the ground rising straight upward with a constant acceleration that has a ...
September 18, 2010

physics
how do i solve for total time? 6.44*2.68?
September 18, 2010

physics
rewriting this, since it was typed wrong. In reaching her destination, a backpacker walks with an average velocity of 1.34 m/s, due west. This average velocity results because she hikes for 6.44 km with an average velocity of 2.68 m/s, due west, turns around, and hikes with an...
September 18, 2010

physics
okay. so regarding number 1. I will use the first method. So I will calculate using this formula? x = v0t + 1/2at^2, in which case.. x = 86(1.70) + 1/2(-10)(1.70)^2? I get x, which would be the position.. how do figure out the height over initial velocity? do i plus 0 in for v0?
September 18, 2010

physics
Here's a physics problem. I dont care about the answer, i just want to know how to do it. dont have to be too detailed.. but i dont really kno how to start this 1.) A model rocket blasts off from the ground rising straight upward with a constant acceleration that has a ...
September 18, 2010

com/155
write a 100- word passage to Susan Anker, the author of the course's textbook, in which you describe five details from her book that are good and five details about the book that are well written. Where can I find Susan Anker's books
September 10, 2010

Math
having problems with this one: 4 qt 9 pt = ______ pt
July 30, 2010

chemistry
Q: I just did an online chemisty lab for Oxidation States of Manganese and I'm stuck. I have three test tubes that have been prepared as follows: Tube 1- Starting PH 13.82 2 mL of KMnO4 1 mL of NaOH Tube 2- Starting PH 7 2 mL of KMnO4 Tube 3- Starting PH 0 2 mL of KMnO4 1 ...
July 27, 2010

chemistry
1.)KMnO4+H2SO4+NaHSO3--> 2.)KMnO4+NaOH+NaHSO3--> 3.)KMnO4+NaHSO3----> Write the net ionic equations for the reactions
July 26, 2010

Maths
I need help with the following if thats ok? Calculate the discriminant of the quadratic expression 2x 2 + 5x − 2.
July 12, 2010

Algebra
Dont even know where to start on this one! x +3 - 1/x=0 2a-b =8 3a+2b=5 Please help!!!
July 7, 2010

early american history
How did capitalism, agriculture, and industrialization contributed to economic development, regional specialization, and social reforms in early american history?
July 3, 2010

TI-83 CALC PROGRAM
Please can anyone help me with this or any part of it? Be very grateful as left it too late... Write a program for ti-83 calculator which generates and displays integer values for A, B and C between 1 and 10; • requests the student to input the solution to the equation...
June 14, 2010

algebra
Solve the equation 3X +1 = 5
June 13, 2010

Managerial Economics
. Remox Corporation is a British firm that sells high-fashion sportswear in the United States. Congress is currently considering the imposition of a protective tariff on imported textiles. Remox is considering the possibility of moving 50 percent of its production to the ...
April 18, 2010

Math
P(3 correct)= (.25)^3 x (.75)^2 combinations; 5C3= 5!/3!2!= 10 answer is 1/64 x 9/16 x 10 = 90/1024
April 7, 2010

social studies
Historians have used the terms "robber barons" and "captains of industry" to describe the powerful industrialists of the late 1800's. compare the two points of view reflected by these terms.
March 24, 2010

6th grade - English
Antonym = opposite meaning of the word
March 22, 2010

english
How would you like us to help you with this assignment
March 21, 2010

Physics
The answer 'B' is wrong? But the only difference is direction of field.
March 20, 2010

ap physics
25521 J
March 14, 2010

Homework
sheer and horse
February 3, 2010

cheerios
February 3, 2010

computers
Saguaro Federal has mainframes for all of its banks and businesses must the company use the Ethernet or Token Ring protocol? Explain your choice why is this choice appropriate?
February 2, 2010

PreCalculus
A variable star is one whose brightness alternately increases and decreases. For the variable star Delta Cephei, the time between periods of maximum brightness varies by +/- 3.5 magnitude. (a)Find a function that models the brightness of Delta Cephei as a function of time. How...
December 13, 2009

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