Friday
November 28, 2014

Posts by Nancy


Total # Posts: 693

calc.
The centripetal acceleration of a particle moving in a circle is a=V^2/r where V is the velocity and r is the radius of the circle. Approximate the maximum percent error in measuring the acceleration due to errors of 3% in velocity and 2% in radius.
December 9, 2010

Calc.
Find the minimum cost of producing 20,000 units of a product, where x is the number of units of labor (at$48 per unit) and y is the number of units of capital (at $36 per unit). P(x,y)=100x^.6y^.4
December 9, 2010

statistics
The average math SAT score is 500 with a standard deviation of 100. A particular high school claims that its students have unusually high math SAT scores. A random sample of 50 students from this school was selected, and the mean math SAT score was 530. Is the high school ...
November 23, 2010

ap physics
189 m/s
November 19, 2010

Physics
a soccer ball kicked with a force of 14.1 N accelerates at 6.8 m/s^2 to the right. What is the mass of the ball? in units of Kg.
November 19, 2010

Statistics
Suppose x is a uniform random variable with c=10 and d=90. Find the probability that a randomly selected observation exceeds26.
November 16, 2010

chemistry
how many moles of SO3 will be produced from 9.1 mol O2
November 13, 2010

geometry/algebra
I asked this question yesterday, and I'm trying to understand it since I got the wrong answer - please explain: You need to make a soda can with a volume of 29 cubic inches. Find the surface area. calculate the following: a) How much material is needed if the can's ...
November 9, 2010

Geometry
Find the measure of each side of equilateral triagnle RST with RS = 2x + 2, ST = 3x, and TR + 5x -4.
November 9, 2010

algebra
Thank you!!
November 8, 2010

algebra
Express the amount of material needed to make a can as a function of the radius. In other words, find a function A(r) such that A represents the surface area (in square inches) of hte cylinder and r is the radius (in inches). my answer (not sure) A(r) = r^2 + 2r + 29 ?
November 8, 2010

algebra/geometry please correct me
sorry: ð = pi
November 8, 2010

algebra/geometry please correct me
You need to make a soda can with a volume of 29 cubic inches. Find the surface area. calculate the following: a) How much material is needed if the can's radius is 2 inch? Answer with the help of Reiny, but doing it with a different radius to make sure I got it. let the ...
November 8, 2010

Finance
Sauerfood company has decided to buy a new computer system with an expected life of 3 yrs. the cost is 150,000.the comapny can borrow $150,000 for 3yrs at 10% annual interest or for one yr at 8% annual interest. How much wld sauer save in interest over the 3 yr life of the ...
November 8, 2010

Algebra
= 64.28319 in^2 thank you!
November 8, 2010

Algebra
You need to make a soda can with a volume of 29 cubic inches. Find the surface area. calculate the following: a) How much material is needed if the can's radius is 1 inch?
November 8, 2010

Science-Organelle
What is the structure of chromatin?
October 26, 2010

U.S. Government
1st Amendment help. How can one argue persuasively that the status quo of Defamation (i.e., New York V. Sullivan) should be changed. Any help or direction one could give, would be appreciated.
October 23, 2010

Biochem
When trying to purify a protein using column chromatography, what happens to the mass of the protein eluted from the column if you accidentally run it dry? Would it be more or less? Thanks.
October 18, 2010

U.S. Government
1st Amendment help. How can one argue persuasively that the status quo of Defamation (i.e., New York V. Sullivan) should be changed. Any help or direction one could give, would be appreciated.
October 16, 2010

math
clue#1 You will use exactly eleven base-ten blocks. Clue#2 The number is less than 300. Clue#3 The digit in the tens place is one less than the digit in the ones place. Who am I? Mom of second grader, can't help her with this!! Can you explain how to figure the answer?
October 15, 2010

8th grade
Ryan left musuem and drove south. Gab left 3 hrs later driving 42 km/h to catch up to him. After 2 hrs gab finally caught up. find Ryan's averae speed?
October 15, 2010

Chemistry
You have a stock solution of 13.4 M NH3. How many milliliters of this solution should you dilute to make 100.0 mL of 0.100 M NH3
October 15, 2010

spelling
what is meaning of groan
October 14, 2010

business law
In what jurisdiction, state and/or federal, and venue will a driver from Florida sue a driver from Washington who collided with him/her in Oklahoma?
October 9, 2010

Physics
I need help with this question...A skateboarder, starting from rest, rolls down a 12.0-m ramp. When she arrives at the bottom of the ramp her speed is 8.90 m/s. (a) Determine the magnitude of her acceleration, assumed to be constanIf the ramp is inclined at 21.5° with ...
October 8, 2010

health
What are the limitstions of what an organizational chart communicates
October 6, 2010

algebra
The heights, h of the students in the chorus at Central Middle School satisfy the inequality absolute value of h-57.5/2< or = 3.25. Determine the interval in which these heights lie.
September 30, 2010

3rd gr math
tyrell says $750 is about $800. Sara says $750 is about $700. Who is correct? Explain? Its number sense.
September 27, 2010

3rd grade math
Mrs.jones has 30 tomatoes plants. she wants to plant the same number of plants in each row of her garden. explain how she could decide the number of rows to plant.
September 23, 2010

algebra
explain why 1,734 is greater than 175?
September 21, 2010

algebra
here is the question: I am confused about the steps I need to follow to be able to complete this question some explanation will be appreciated :) In a Multiple - choice examination of 25 questions, four marks are given for each correct answer and two marks are deducted for ...
September 14, 2010

math
whats the sum of a number and -5 and a number
September 13, 2010

health
Post a 250- to 300-word response to the following: What are the major differences between inpatient and outpatient hospital services? Describe how these differences affect the coding process and provide examples.
September 10, 2010

social studies
What do you call maps thatshow features that humans have created on Earth's surface?
August 25, 2010

social studies
What are maps called that focus on specific ideas?
August 25, 2010

Nutition
"The body absorbs lipids mostly within the small intestine. The gallbladder secrets a chemical called bile to aid in the breakdown of this fat. From there the fat is broken down farther by the enzymes the pancreas makes. The mixture of "fatty acids, partially ...
August 22, 2010

Nutrition
How do lipids move through the body do they can be digested and absorbed? How are lipids stored in the body?
August 17, 2010

Essentials of Managerial Communication
Thank you that helped!
August 15, 2010

Essentials of Managerial Communication
Discuss how technology could be used to facilitate cross-cultural communication.
August 15, 2010

biology
thanks : )
August 7, 2010

biology
What is the source of energy driving the hydrolic cycle? a. evaporation of the ocean water b. heat conducted from the earth's core to the surface c. radiant heat from the sun d. air currents returning to the earth's surface I chose a) evaporation of the ocean water. ...
August 7, 2010

science
a 5.o kg book is sitting on a table. which describes the forces acting on the book? a)there are no forces acting on the book b)the net force on the book is zero Since the weight of the book is cancelled out by the support of the table. does that mean a) there are no forces ...
August 7, 2010

science
a certain's plant root contain higher concentrations of nitrate than the soil that surrounds them. Which mechanism explains the movement of nitrates form the soil into the plant's roots? a)osmosis b)facilitated diffusion c)active transport d)filtration I chose c) ...
August 7, 2010

English
Thank you : )
August 5, 2010

English
Deep (1)cognition deep thinking, is vital. (1) a)no change b)cognition, deep thinking, is vital. c)cognition, deep thinking is vital. d cognition: deep thinking, is vital. On this one I answered a) using a comma to separate each description. was that correct?
August 5, 2010

English
wonderful --thanks ; )
August 5, 2010

English
(1)Once the lecture starts:let your mind dart (2)ahead during pauses to anticipate what is next. (1) a) No change b)Once the lecture starts, let your mind c)Once the lecture starts; let your mind I chose b) (2) a)no change b)ahead (during pauses) c)ahead, during pauses d)ahead...
August 5, 2010

English
yayy I got it right then : ) thanks!
August 5, 2010

English
no storms in the ______ future. a)forseable b)foreseeable I chose b)foreseeable but when I looked it up online both came up in the spelling. which is correct? thanks
August 5, 2010

English
thanks : )
August 5, 2010

English
The team ___ won the game is my favorite. a)that b)who c)whom I chose a)that Now after reading it a few times sounds like b)who could have been the right one.
August 5, 2010

English
"try saying the sentence with only one of the pronouns at a time." Best tip ever!! : )
August 5, 2010

English
He and I have been to class was the correct answer I will remember it for next time : ( thanks
August 5, 2010

English
______ and _____ have been to class. a) He, me b) He, I c) Him, I I chose a)He and me but a friend told me she thinks c)Him and I sounds better. Now I'm doubting myself...
August 5, 2010

English
An average student remembers about 50 percent of a ten-minute lecture when tested (2)immediately; and 25 percent of same lecture when testd fifty-five hours later. (2) a)No change b)immediately -- and c)immediately and I chose answer c) since I didn't think a comma was ...
August 5, 2010

Englsih
Yes!! thanks
August 5, 2010

Englsih
These poor (3) results have occured when students where unable to package the (4) instructors ideas's into easily units. (3) a)no change b)results occur c)results occurred I think the answer is c) since this sentence is talking in the past tense. (4) a)no change b)...
August 5, 2010

ENGLISH
thanks : )
August 5, 2010

ENGLISH
You'll be alert, engrosed in the (14)material.And concentrated 100 percent. a) no change b) material, and c) material; and d) material and After reading it over and over, I think b) a comma after material would be the correct answer. I think this is a compound sentence, ...
August 5, 2010

ENGLISH
oh, thanks!
August 4, 2010

ENGLISH
Before class, you should look over your notes from the last(9)lecture and take a minute to speculate about what your instructor is going to talk about today. (9) a) No change b) lecture, and c) lecture; and I think it need a comma after lecture is that correct? thanks
August 4, 2010

english
Yes, I am guessing a)according to the comma rule 1: Use a comma to separate the elements in a series (three or more things). English is my 2nd language so I read and guess my best according to the rules,still I'm never too sure. am I right?
August 4, 2010

english
choose proper punctuation George, leave the room, shut the door, and be quiet b)George;leave the room, shut the door and be quiet c)George leave the room, shut the door and be quiet d)b)George leave the room, shut the door, and be quiet My first guess is a) but I'm tempted...
August 4, 2010

english
Wow!! Thanks, I really appreciate it!
August 4, 2010

english
Having been discovered, Fifi looked up at his owner with puppy-dog eyes. First sentence is right. Second sentence 'the owner' didn't have puppy dog eyes. So, I say remove c) his owner and it will read Having been discovered, Fifi looked up with puppy-dog eyes. ?
August 4, 2010

english
It could also be a) with puppy-dog eyes? So it would read: Having been discovered, Fifi looked up at his owner Kind of doens't make sense to me.
August 4, 2010

english
I think the answer is. b) been discovered
August 4, 2010

english
Which group of words is the sentence below misplaced? Having been discovered, Fifi looked up at his owner with puppy-dog eyes. a)with puppy-dog eyes b)been discovered c)his owner d)Fifi looked up
August 4, 2010

english
Thank you very much!
August 4, 2010

english
When I read it outloud c) sounds better but according to rules you just sent me, it would be a). I'm confused when it comes to this sentence. thanks
August 4, 2010

english
My fist guess was a), but then c) seems like a better answer
August 4, 2010

english
Choose the correct comma placemnent for the sentence below> a. plump, old, white cat b. plump, old, white, cat c. plump, old white cat d. plump old white cat
August 4, 2010

world religions
Thank you it looks like it will be very helpful.
July 17, 2010

world religions
I am conducting a research paper and am having trouble finding comparisons and contrasts between Judaism and Buddhism with credital authors, where could I go to find this information?
July 17, 2010

veterinary medicine
A pet owner accidentally applies 2.5 ml of a dog flea product containing 45% permethrin to a 15 lb cat. What is the dosage this cat received?
July 12, 2010

alg
yes, it is a because you factor... x^2-81= x-9(x+9) x^2+18x-81= (x+9)(x+9) check: 9x+9x= 18x x*x= x^2 -9*9= -81 ((x-9)(x+9))/((x+9)(x+9))-> cross out x+9 ANS:(x-9)/(x+9)
June 29, 2010

Calculus
Find all critical points of the function. f(x) = xe^3x so x= ? Show steps or tell me how I find them?
June 29, 2010

chemistry
an organic sbstance has an enthalpy of vaporization of 29.0 kl/mol. the compound has a vapor pressure of524 mm HG at 25 C. at what tempurture is the vapor pressure equal to 115mm HG?
June 12, 2010

crt205
why and how could you apply critical thinking when evaluating an article?
June 9, 2010

trig
A car travels around a circular track at 185 miles per hour. Is this a linear velocity or an angular velocity? Explain.
June 9, 2010

crt205
what is a fallacy
May 16, 2010

programming
for a list of numbers entered by the user and terminated by 0, find the sum of the positive numbers and the negative numbers
May 16, 2010

calculus
a circle of radius 1 rolls around the outside of a circle of radius 2 without slipping. the curve traced by a point on the circumfarence of the smaller circle is callled an epicycloid. use the angle theta to find a set of parametric equations for this curve.
May 12, 2010

calculus
thank you..
May 12, 2010

calculus
a toy wagon is pulled by exerting a force of 15 pounds on a handle that makes a 30 degree angle with the horizontal. find the work done in pulling the wagon 50 feet.
May 12, 2010

calculus
thanks
May 12, 2010

calculus
a 100 pound collar slides on a frictionless vertical rod. find the distance y for which the system is in equilibrium if the counterweight weights 120 pounds.
May 12, 2010

calculus
a circle of radius 1 rolls around the outside of a circle of radius 2 without slipping. the curve traced by a point on the circumfarence of the smaller circle is callled an epicycloid. use the angle theta to find a set of parametric equations for this curve.
May 11, 2010

math
Find the Magnitude and direction of the resultant force. three forces with magnitude of 50,20, and 40 points acting on an object at angle 60 degres, 30 degrees, and -90degrees,k respectevly with the positive x-axis.
May 11, 2010

math
thanks
May 6, 2010

math
A golf ball is hit off the ground at an angle of pie/6 and it travels 400 ft. How long was the golf ball in the air?
May 6, 2010

math
Thanks
May 3, 2010

math
How many pounds of Acid Per inch? If you have a tank that’s 51ft 0 in. long by 4ft 7 in. wide, and need to fill it to the two inch mark with hydrochloric acid, how many pounds are you putting in it? (Hint 1 gallon of acid weights 9.8 lbs.
May 3, 2010

math
A bicycle wheel has a diameter of 26 inches. About how far will it travel in one revolution?
May 3, 2010

math
its a 75
April 30, 2010

math
thanks, after multipling i got 2855.72 lbs would that be correct..
April 30, 2010

math
How Many pounds of acid per inch? If you have a tank of 51ft long by 4ft 7in wide, and need to fill it to the two inch mark with hydrochloric acid, how many pounds are you putting in it? (Hint 1 gallon of acid weights 9.8 lbs. Nancy 2:28
April 30, 2010

chemistry
A 4.50e-2 M solution of unknown monoprotic weak base has a pH of 10.200 what is the value of kb for the base
April 28, 2010

chemistry
What is the pH of a .10M (CH3)3N solution? Kb=6.40e-5
April 28, 2010

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