# Posts by angie

Total # Posts: 1,409

**algebra**

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

**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.

**biology**

what is the mass in grams of 1.03 kg 1105g and 1075000mg

**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 ...

**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 ...

**Chemistry**

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

**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 ...

**History**

In general, The unites states.

**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.

**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.

**Chemistry/Math**

Where does the 5 come from?

**Chemistry/Math**

(6000)(1/86400)*(1/3)sqrt(5/2Pi)

**Chemistry/Math**

When I calculate what you did, I don't get the same answer.

**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,...

**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, ...

**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.

**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?

**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 .

**Chemistry**

100 g

**Human Resources**

What do you think are three most prominent characteristics of a human service professional?

**math**

x2 -x - 6? the 2 is exponent

**math**

P=2L+2W+L Please check my answer L=P-2w/2

**math**

2x+3y=9

**math**

The radius of a circle in terms of its circumference

**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?

**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

**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!

**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!

**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?

**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.

**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

**college chemistry**

0.171 g Li

**college chemistry**

75.0 g NaHCO3

**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.

**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...

**math**

13.2

**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 ...

**math**

30 3/4 x 60 3/8 what is the area of the new building?

**General math**

30 3/4 x 60 3/8

**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

**Chemistry**

1.67014614E-27 kg

**Chemistry**

1.67014614E-27

**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

**Calculus**

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

**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?

**Calculus**

find f'(x) if f(x)= (cosx)^sinx

**Calculus**

find y' if sin^-1(xy)=cosy

**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...

**math/calc**

find y'' if x^4+y^4=16

**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

**math 205**

the product of 3 and y is less than or equal to the sum of y and 6

**math/calculus**

Find f’’(x) if f(x)=(6^x^2+3)

**math/calculus**

Find f’’(x) if f(x)=(6^x^2+3)

**math/calculus**

Find f’’(x) if f(x)=(6^x^2+3)

**pennfoster**

B.We helped Joan to pack her things.

**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))

**math/calculus**

find the domain and range of the function f(x)=x^2-9/4x^2+x

**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.

**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.

**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

**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)

**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)

**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

**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?

**math/calculus**

find f"(x) if f(x)= cube root(x^2-2x+1)

**math/ calculus**

full work out with explanation of this problem please we're working with derivatives and i don't understand it given h(x)= cotx/x find h'(pi/2)

**math/ calculus**

its like a sub three times the squareroot of x^2-2x+1

**math/ calculus**

find f''(x) if f(x)= 3(ãx2-2x+1)

**math/calculus**

given h(x)= cotx/x find h'(ð /2)

**math/ calculus**

given h(x)= cotx/x find h'(ð/2)

**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, ...

**statistics**

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

**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 ...

**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?

**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.....

**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?

**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 ...

**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...

**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?

**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...

**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 ...

**math (please help)**

Let r= 3-3 sin θ How do I test for symmetry θ = π/2?

**Chemistry**

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

**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 ...

**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 ...

**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?

**General-English**

Is the change in trade name of a material considered a "like-for-like" change?

**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

**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.

**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'

**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 .

**DRAMA**

Thanks

**DRAMA**

One difference between tragedy and comedy is that tragedy A. uses supernatuarl elements B. usually features an extraodinary hero. C.makes us laugh at ourselves,not others. D. uses metaphors and analogy to make its point

**The Short Story Part 2**

Thank You

**The Short Story Part 2**

In a "Pair of Silk Stockings",the silk stockings are a symbol of? A.Mrs. Sommers's inability to handle money. B.Mrs. Sommers's lack of concern for her children. C.Mrs. Sommers's selfish needs. D.Mrs. Sommers's desire for attention.

**chemistry**

How many grams of Cu(OH)2 can be produced from the reaction of 0.500g Cu with 30.0 mL of 3.0M NaOH? Which reactant is the limiting reagent?

**Math**

Water covers approximately 11,800 mi squared of Florida, which is about 18% of Florida's area. What is the total area of Florida to the nearest thousand square miles?

**statistics**

128

**algebra**

jim bought a pair of shoes for $50 and laces for $1. if the sales tax is $7, how much tax must he pay?

**math**

A separate blueprint for the ramp uses a scale of 1cm : 25cm. The height of the ramp on the blueprint is___ cm.