Saturday
December 20, 2014

Posts by Angie


Total # Posts: 1,207

Algebra
I cannot solve the problem please help me. I'm suppose to set the equations up to solve for t. x = y + rt + at^2/2 Even when I plug in the values I don't get the answer. x = 16.4 y= 0 r= 0*cos(45)a=0 t is suppose to equal 2.32 if I set the problem up correctly.
October 11, 2012

Landforms-history
A plateau
October 4, 2012

Health Care Management
During the health care debate in Congress Republicans were accused of wanting to "Kill Granny". Is David Blumenthal implying something along the same lines as Congressional Republicans are purported to support? How can this issue be addressed?
October 4, 2012

Alegbra
I have to use this equation to get the answer (t)=time. V=S+a*t I divided t by both sides, but get a little confuse do I divide V by both sides as while is the answer: t = V/s+a/S??
October 4, 2012

Geometry
Complete Problem #28 in Section 1.5 Exercises (Chapter 1) of Essentials of Geometry for College Students. Use the table below to show your work and solve the problem. You may add or delete rows as necessary. Statements Reasons PQ=RS Given PS=PQ+RS Segment Addition Postulate PR...
October 4, 2012

Physics
A bicyclist makes a trip that consists of three parts, each in the same direction (due north) along a straight road. During the first part, she rides for 22 minutes at an average speed of 6.50m/s. During the second part, she rides for 36 minutes at an average speed of 4.30m/s...
September 29, 2012

Chemistry
How can you calculate activation energy in (kj/mol)? When all that is given is inverse temperature, and natural log reaction constant? Inverse: 1/278 for Kelvin temp, 1/308 Natural Log Reaction Rate Constant: 4.3 5.5
September 25, 2012

Chemistry
How do you do the inverse of absolute temperature? My kelvin temperatures are: 298 308 318 328 338 348 358 368 378 Taking the natural log of both sides of both sides of the equation gives ln(k) = ln(A) – E/RT. Thus, a graph of the natural log of the reaction rate constant...
September 25, 2012

Calculus
I'm having problems with this one. Can't get the right answer. Differentiate the following using the chain rule. f(x) = squareroot(x^2+1)/(3x+1) I know that I can take the whole thing and put it to the (1/2) and differentiate that then use the quotient rule to ...
September 22, 2012

Physics/Chemistry
I am not producing the correct answer which is 2.06 psia. Question: The pressure gauge on the steam condenser for a turbine indicates 26.2 in. Hg of vacuum. The barometer reading is 30.4 in. Hg. What is the absolute pressure in the condenser in psia? I know that 1 in. Hg = 0....
September 18, 2012

4th grade math
I have 5 ones and 19 hundredths. What number am I?
September 17, 2012

Chemistry/Math
I'm not sure how to approach this problem. A manometer uses kerosene, specific gravity 0.82 as the fluid. A reading of 5 inches on the manometer is equivalent to how many millimeters of mercury?
September 17, 2012

algebra
im having trouble with subsets.. name the subsets to which the numbers belong 3/4 0 -6 square root of 7 5
September 17, 2012

Chemisty/Physic
How can I find the pipe diameter when given the velocity = 1 m/s and the volumetric flow rate = 6000 m^3/day and flow area = 6000 m^2/s So that everything cancels leaving me with meters so I can write my answer in cm.
September 13, 2012

biology
what is the mass in grams of 1.03 kg 1105g and 1075000mg
September 12, 2012

Excel & Math
I'm not sure what two excel functions to use that will give the correct answer and how to copy the information to each cell and the values stay the same. 2. A home loan is to be repaid by a series of equal monthly payments over many years. Prepare a worksheet to calculate ...
September 12, 2012

Math/Excel
I'm not sure what two excel functions to use that will give the correct answer and how to copy the information to each cell and the values stay the same. 2. A home loan is to be repaid by a series of equal monthly payments over many years. Prepare a worksheet to calculate ...
September 7, 2012

Chemistry
In part b when it says compressing the piston 2 cm from the bottom of the cylinder. This value is irrelevant?
September 6, 2012

Chemistry
I need help with part b here's all information. (a) Chlorine gas is added to a glass cylinder of 2.5 cm in radius, fitted with a movable piston. Gas is added until the piston is lifted 5 cm off the bottom of the glass. The pressure on the gas is 1 atm, and the gas and ...
September 6, 2012

History
In general, The unites states.
September 4, 2012

History
Humans modify the environment in places they live. For example, people convert fields and forests into towns and irrigate arid land to support farming. Give 2 examples of ways people have modified the environment where we live.
September 4, 2012

Chemistry/Physics
The equation needed to solve for volumetric flow rate = flow area * velocity How do you calculate flow area when all is given is velocity 1 m/s and 6000 m^3.
September 4, 2012

Chemistry/Math
Where does the 5 come from?
September 4, 2012

Chemistry/Math
(6000)(1/86400)*(1/3)sqrt(5/2Pi)
September 4, 2012

Chemistry/Math
When I calculate what you did, I don't get the same answer.
September 4, 2012

Chemistry/Math
I went to my teacher numerous times. I'm still not using the right formulas or equations. Please help. A commonly used rule of thumb is that average velocity in a pipe should be about 1 m/s or less for "thin" (viscosity about water). If a pipe needs to deliver 6,...
September 4, 2012

Science
I have no idea what to do, and the teacher wants the volumetric flow rate (in cm). A commonly used rule of thumb is that average velocity in a pipe should be about 1 m/s or less for "thin"(viscosity about water). If a pipe needs to deliver 6,000 m^3 of water a day, ...
August 31, 2012

algebra
one angle of a parrallelogram is 23 degrees less than six times the measure of the angle next to it.the sum of the measures of the angles is 180 degrees. find the measure of the adjacent angles of the parrallelogram.
August 27, 2012

MATH
ROBERT NUMBER IS BETWEEN 20 AND 32. THE SUM DIGITS IS 10. WHAT IS ROBERT NUMBER? I KNOW ANSWER IS 28 BUT NEED TO KNOW STEP BY STEP HOW TO GET TO 28?
August 23, 2012

VOCABULARY
In order to change the meaning of the word teach from "to give instruction" to "to give instruction with" you would add the prefix .
August 17, 2012

Chemistry
100 g
July 30, 2012

Human Resources
What do you think are three most prominent characteristics of a human service professional?
June 29, 2012

math
x2 -x - 6? the 2 is exponent
June 24, 2012

math
P=2L+2W+L Please check my answer L=P-2w/2
June 13, 2012

math
2x+3y=9
June 13, 2012

math
The radius of a circle in terms of its circumference
June 13, 2012

Math (2)
A person just fitted for contact lenses is told to wear them only 2 hours the first day and to increase the amount of time by 20 minutes each day. After how many days will the person be able to wear the contacts for 14 hours?
June 10, 2012

Math
A person just fitted for contact lenses is told to wear them only 2 hours the first day and to increase the amount of time by 20 minutes each day. After how many days will the person be able to wear the contacts for 14 hours? *Solve using a arithmetic series
June 10, 2012

math
Thank you for the clarification on A and for B the way the question is worded I think I'm going to go with the .96... THANKS GUYS!
June 8, 2012

math
the question is asking for the eighth time it hits the ground so wouldn't that include the other part of the .96, because what you have here is technically hitting the ground 7 times and the ball is in mid-air.... and for b) how did you set the problem up? Thank you!
June 8, 2012

math
A superball is dropped from a height of 2 m and bounces 90% of its original height on each bounce. (a) When it hits the ground for the eighth time, how far has it traveled? (b) How high off the floor is the ball on the eighth bounce?
June 8, 2012

Intermediate Algebra
y varies directly as the cube of x and inversely as the square of z. If y is 30 when x is 2 and z is 4: b) Find the equation that models this data. c) Find the value of y when x is 3 and z is 2.
April 28, 2012

Calculus
the edge of a cube was found to be 18 inches with a possible measurement error of 0.1 find the max possible error in calculating the surface area of the cube
April 18, 2012

Algebra
Reiny...yes, thank you. I appreciate the help so much. I did have the some work-up for X=smallest angle. Thanks for starting me out for the next 2 angles.
April 14, 2012

Algebra
The following problem must be solved 3 different ways in which X=smallest angle for problem 1. Problem 2 would be X=medium sized angle. Problem 3 would start with X=largest angle. I was able to figure out X=smallest angle, but I am stumped on the other 2 as to how to set it up...
April 14, 2012

Accounting1
Consider the following scenarios: (Please respond to each scenario) When we talk about "bad checks," are those always checks our customers have written to us? Explain. Would the company also write any bad checks and what are the repercussions for the same? Give ...
March 27, 2012

math
30 3/4 x 60 3/8 what is the area of the new building?
March 23, 2012

General math
30 3/4 x 60 3/8
March 20, 2012

Calculus
Find the following limits algebraically or explain why they don’t exist. lim x->0 sin5x/2x lim x->0 1-cosx/x lim x->7 |x-7|/x-7 lim x->7 (/x+2)-3/x-7 lim h->0 (2+h)^3-8/h lim t->0 1/t - 1/t^2+t
March 15, 2012

Chemistry
1.67014614E-27 kg
March 4, 2012

Chemistry
1.67014614E-27
March 4, 2012

Algebra
The electric current I in a circuit varies directly as the voltage V. When 21V are applied, the current is 4A. What is the current when 18 volts are applied
March 2, 2012

Calculus
what is the curve given by the equation x^3=3xy^2+y^3=1 what is dy/dx?
February 29, 2012

yargo
a garden is shaped like an x. there is a right angle at each corner of the garden and each side of the garden measures 40 feet long. what is the area of this garden?
February 27, 2012

Calculus
find f'(x) if f(x)= (cosx)^sinx
February 23, 2012

Calculus
find y' if sin^-1(xy)=cosy
February 16, 2012

Simple Interest & Maturity Value
On September 7, Jennifer Rick went to Park Bank to borrow $3,200 at 11 2/3% interest. Jennifer plans to repay the loan on January 5. Assume the loan is on ordinary interest (ordinary interest uses 360 days a year). Solving for: 1. interest Jennifer will owe on January 5 2. the...
February 16, 2012

math/calc
find y'' if x^4+y^4=16
February 15, 2012

math/Calc
g(x)={1+cos(pi/2-x/1) 0 for-2 <or= x <or=2 for x<2 or x>2 is g(x) continuous at x=2 is it differentiable at x=2? ex[lain in detail I'm very confused as to how to solve this problem
February 9, 2012

math 205
the product of 3 and y is less than or equal to the sum of y and 6
February 2, 2012

math/calculus
Find f’’(x) if f(x)=(6^x^2+3)
January 19, 2012

math/calculus
Find f’’(x) if f(x)=(6^x^2+3)
January 19, 2012

math/calculus
Find f’’(x) if f(x)=(6^x^2+3)
January 19, 2012

pennfoster
B.We helped Joan to pack her things.
January 19, 2012

math/calculus
f(x)=the squareroot of (x^2-9) and g(x)=1/x-4 find the domain and range of f(g(x)) anf f(f(x))
January 10, 2012

math/calculus
find the domain and range of the function f(x)=x^2-9/4x^2+x
January 10, 2012

MATH
MARY SAYS THAT THE GREATER THE NUMBER OF COUNTERS, THE GREATER THE NUMER OF DIFFERENT ARRAYS YOU CAN FORM. GIVE AN EXAMPLE THAT SHOWS THAT MARY IS WRONG.
January 5, 2012

MATH
MARY SAYS THAT THE GREATER THE NUMBER OF COUNTERS, THE GREATER THE NUMER OF DIFFERENT ARRAYS YOU CAN FORM. GIVE AN EXAMPLE THAT SHOWS THAT MARY IS WRONG.
January 5, 2012

statistics
The abc shoe factory manufactures shoes 24 hours a day. the workers produce 50,000 shoes every 2.3 days How many hours does it take to produce 50,000 shoes
January 3, 2012

math/calculus
f(x)= the absolute value of x^2-6x-7 a) Find a piecewise defined function that has no absolute value involved b) Let g(x)=f(x) for x is greater than or equal to 7 find an expression of g^-1(x) c. give the domain and range of g^-1(x)
January 2, 2012

math/calculus
let f(x)=ln(x)x>0 let k(x)= f(g(x)) and m(x)= f(g(x)) a) Find the domain of the function K(x). b) Find the domain of the function M(x). c) Find the value of k'(5)
January 2, 2012

math/calculus
lim as x->+1 x^3 -1/x^2 -1 lim as x->-1 x^3 -1/x^2 -1 lim as x->1 x^3 -1/x^2 -1
January 2, 2012

College Algebra
The function H(x) = 2.75x + 71.48 can be used to predict the height in cm of a woman whose humerus is "x" cm long. Predict the height of a woman whose humerus is 34 cm long?
December 31, 2011

math/calculus
find f"(x) if f(x)= cube root(x^2-2x+1)
December 20, 2011

math/ calculus
full work out with explanation of this problem please we're working with derivatives and i dont understand it given h(x)= cotx/x find h'(pi/2)
December 20, 2011

math/ calculus
its like a sub three times the squareroot of x^2-2x+1
December 19, 2011

math/ calculus
find f''(x) if f(x)= 3(ãx2-2x+1)
December 19, 2011

math/calculus
given h(x)= cotx/x find h'(ð /2)
December 19, 2011

math/ calculus
given h(x)= cotx/x find h'(ð/2)
December 15, 2011

Physics
The drawing shows an ideal gas confined to a cylinder by a massless piston that is attached to an ideal spring. Outside the cylinder is a vacuum. The cross-sectional area of the piston is A = 2.50 10-3 m2. The initial pressure, volume, and temperature of the gas are, ...
November 16, 2011

statistics
Hi there, I need help with the quialitive summary paper. My subject is on elder abuse.
November 16, 2011

math
joe left a campsite on a trip down the river in a canoe, traveling a 6 km/h. four hours later, joe's father set out after him in a motorboat. The motrboat traveled at 30 km/h. how long after joe's father started did he overtake the canoe? how far had joe traveled down ...
November 15, 2011

math
a train left podunk and traveled north at 75 km/h. two hours later, another train left podunk and traveled in the same direction at 100 km/h. how many hours had the first train traveled when they were 1420 km apart?
November 15, 2011

computer
Which type of graphics file format keeps track of each individual point in the immage? a) bitmap b) detailed image c)pointilated D) vector.....
November 9, 2011

Chemistry
My mobile phase for HPLC (High Performance Liquid Chromatography) test consists of 3 components in the ratio 5:250:745. In preparing the mobile phase, is it advisable to first measure 745ml of component A, followed by 250ml of component B and lastly 5ml of component C?
November 3, 2011

math
Howard leaves the dock and sails 2.5miles west He turns south and sails 3.5 Then he turns east and sails 2.5 miles In what direction should howard turn if he wants to use the most direct route to return to the dock ? If Howard use this route ,how many miles will he hv sailed ...
November 2, 2011

Chemistry
Hi, I have a question on column length for HPLC (high performance liquid chromatography). If the column length is increased,eg from 100mm to 150mm and all other column parameters e.g. particle size of stationary phase, internal diameter..etc.remain the same, how does it affect...
October 20, 2011

Arts/230
Social views and patterns are often protrayed in art. How did the rising middle-class of the enlightenment era play into the context of their painting? Did it contribute to or detract from the technical qualities of the paintings?
October 9, 2011

Chemistry-help needed
Posted by angie on Saturday, October 8, 2011 at 6:02am. I have a method using HPLC (high performance liquid chromatography). It states that a 4.6 x 150mm,3um column should be used. (stationary phase : octadecylsilyl silica gel). I have a 4.6 x 100mm,2.7um column, silica-based...
October 8, 2011

Chemistry-thanks
I have a method using HPLC (high performance liquid chromatography). It states that a 4.6 x 150mm,3um column should be used. (stationary phase : octadecylsilyl silica gel). I have a 4.6 x 100mm,2.7um column, silica-based, bonded-phase (non-polar) column. Can you advise if ...
October 8, 2011

math (please help)
Let r= 3-3 sin θ How do I test for symmetry θ = π/2?
October 5, 2011

Chemistry
Is there a formula used to calculate this problem, or should I only look at the table in my book?
October 4, 2011

business communications
when you are writing subject lines for negative messages to peers and subordinates: a) put the topic, but not your action on it, in the subject line. b)put the topic, including your action on it, in the subject line. c)do not include the topic on the subject line. d)describe ...
September 28, 2011

General-English
Posted by angie on Sunday, September 25, 2011 at 4:48pm. Is the change in trade name of a material considered a "like-for-like" change? General-English - Ms. Sue, Sunday, September 25, 2011 at 4:52pm Please explain what you mean by a "like-for-like" change ...
September 25, 2011

General-English
Is it an equivalent (i.e. identical?"? For example, if I change an old piece of equipment with a new piece which has exactly the same specifications as the old one, then it is an equivalent change. In this case, I think it is not an equivalent change?
September 25, 2011

General-English
Is the change in trade name of a material considered a "like-for-like" change?
September 25, 2011

physics
if two lighting volts heat exactly same place at the same time in are frame of ref,it is possible that observes in other frames will see the volts heating at def. time or diff. places? explain
September 25, 2011

physical science
if two lighting volts heat exactly they same place at they same time in are frame of ref.,it is possible that observed in other frames will see the volts heating at diff. time r at diff. places????? explain.
September 25, 2011

geometry
U=(a,b,c,d,e,f,g,h,i,j,k) A=(a,c,d,f,g,i) B=(b,c,d,f,g) C=(a,b,f,i,j) Determine the following A'square B'
September 22, 2011

physics
A particle travels along a straight line with a speed = (0.50 -7 ), where is in seconds. Determine the acceleration of the particle when = 2 .
September 19, 2011

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