Tuesday
September 23, 2014

Posts by sandra


Total # Posts: 884

physics
You are driving south on a highway. Then, without changing speed, you round a curve and drive west. Do you accelerate?
August 31, 2011

physics
You are driving north on a highway. Then, without changing speed, you round a curve and drive east. Does your velocity change?
August 31, 2011

maths
the diameter of a wheel is 84cm? How far it travels in one turn?
August 30, 2011

ETH125
what changes has the US made to certain polices concerning the treatment of Muslims and Arabs?
August 25, 2011

geology
How do oceans regulate climate?
August 2, 2011

Math
Suppose the interest rate is 8% APR with monthly compounding. What is the present value o an annuity that pays $90 every 6 months for 5 years?
July 14, 2011

Med terms
I find nine(9)words, but I need ten (10) I do not know what I am missing. But I am missing a word and place my finger on it. Dob chronic obstructive pulmonary disease (COPD) aphonia sputum apnea days dyspnea paroxysm ventilator So what is I missing here?!
July 12, 2011

educational statics
how often does the university admit an exception student with a SAT score of x =700 or above Asample of 36 students (N)- 36 were randomly selected with mean (=11,and standard deviation (x=12. the sample mean score X=9.
July 10, 2011

educational statics
the average SAT score at a local university is (=60, and standard is (x=50. Assume that the university SAT score has a normal distribution convert a student score x=700 into z score
July 10, 2011

algebra 2
1) In the general second-degree equation Ax^2 + Bxy + Cy^2 + Dx + Ey = F = 0, what is the discriminant and what does it tell you about the graph of the equation? 2) Which terms in a general second-degree equation (Ax^2 + Bxy + Cy^2 + Dx + Ey = F = 0) are used to find the ...
July 10, 2011

stats
For a normal distribution where mx= 80 and sx= 10, the distribution model fits well to test scores of N = 20000 students.
July 10, 2011

business communication
A~handwritten applications
June 19, 2011

MATH
3 PIZZAS WERE EACH CUT INTO 8 PIECES. TEN OF THE PIECES WERE EATEN FOR LUNCH
May 29, 2011

Pre-Cal
From a point 50 feet in front of a church, the angle of elevation to the top of the steeple is 48 degrees. Find the overall height of the church and steeple.
May 23, 2011

algebra
a number is represented by the variable x at least is represented by the ≥ symbol and the last part of the inequality is 15 so the answer is x ≥ 15
May 19, 2011

math
what is 25 more than 5 times and number and x
April 29, 2011

Mathematical for Educators 1
Jim bought two shirts that were originally marked at $40 each. One shirt was discounted 20% and the other was discounted 25%. The sales tax was 4.5%. How much did he spend in all
April 21, 2011

English
what is the simple predicate in the sentence, I could hear the wind blow through.
April 18, 2011

math
What are the steps to the solution for this problem? What is the difference between 330 and half n equals 114?
April 13, 2011

PENN-FOSTER
that not what i said you are not making it clearer you are putting words in my mought i look at some one else question she was asking for the anser not help that the one back you should be on not mine because like i said i did not know about this my daughter told me they can ...
April 11, 2011

PENN-FOSTER
like i said this is my first time on this web page so i did not understand she said let ask them the question because they will help you with the ones you having trouble with i did not just want the anser i taught someone who took it already could explane it better let not ...
April 11, 2011

PENN-FOSTER
ok i did not know my daughter just told me to go to this web sit and ask any way thank you i did not want th anser i said i was having problems with does questions
April 11, 2011

PENN-FOSTER
i am not beeing rude i am just not to good with the computer you are been rud i would i would like to know your name and i am not cheating every body bask questions that wat the web site is for thank you
April 11, 2011

PENN-FOSTER
HI I AM NOW DOING FACILITIES AND STAFF BUT I AM HAVING SOME STRUGGLES WITH NUMBERS 8,9,10, 11,12 I AM ASKING SOME ONE WHO TOOK THIS CLASS TO PLEASE HELP ME
April 11, 2011

chemistry
a 5.0 dm3 sample of oxygen at a pressure of 200 kPa and 2.0 dm3 sample of nitrogen at a pressure of 500 kPa are introduced into a 2.5 dm3 vessel. what is the total pressure in the vessel?
April 10, 2011

introduction to accounting
a merchandising company wants to include the cost of operating its warehouse in the cost of inventory. The company’s controller argues that the cost of the warehouse is a reasonable and necessary cost of getting the inventory ready for sale and, therefore, should be ...
April 7, 2011

statistics
5. Congressional Committee Memberships The composition of the 108th Congress is 51 Republicans, 48 Democrats, and 1 Independent. A committee on aid to higher education is to be formed with 3 Senators to be chosen at random to head the committee. Find the probability that the ...
March 24, 2011

Algrebra 1
x2(squared)-12=-x solve by completing the square
March 20, 2011

Chemistry
Thanks a lot! I realized that I forgot to account for the volume change when I calculated my molarities for the base and the acid, and that was enough to get the pH off by 0.01.
March 18, 2011

Chemistry
Okay, so I found the ion concentrations through the Henderson-Hasselbalch equation, and the concentrations I got: [Acetic Acid] = 0.036525666 [Acetate] = 0.063474334 I got the same concentrations as when I did my ice chart, and I also got the same delta pH, which was -0.266.
March 18, 2011

Chemistry
Here's what I did: So I set values for: [Acetic Acid] = y [H3O+] = 10^-5 [Acetate] = 0.1M - y Ka = 10^-4.76 And from the equation: Ka = [Acetate][H3O+]/[Acetic Acid], I found y, or the molarity of acetic acid, to be 10^-6/(10^-5 + 10^-7.46). And from this, I also got the ...
March 18, 2011

Chemistry
I did everything from the beginning and I didn't round anything at all until my last step where it told me to round to two decimal places. I still can't get the answer, though
March 18, 2011

Chemistry
Sorry, I forgot to say that it told me to round it to two decimal places.
March 18, 2011

Chemistry
A beaker with 100 mL of an acetic acid buffer with a pH of 5.00 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 6.10 mL of a 0.260 M HCl solution to the beaker. How much will the pH change? The pKa of acetic ...
March 18, 2011

physics
10 k r point g point degree
March 17, 2011

English
Help me write an essay on How I learned English by Gregory Djanikian.
March 16, 2011

astrology of GEO PHYSICS
3 point 666 point one fifth degree
March 13, 2011

algebra
It takes 7 hours for Will to paint a house. Judy can paint the same house in 3 hours. How long will it take them to paint the house if they work together?
March 11, 2011

math
2.75 divided by 1000
March 8, 2011

Com/171
What is wrong with this sentence: The diplomats are doing what they can to restore peace.
February 28, 2011

Com/171
Your welcome. I was happy to help.
February 28, 2011

physics
Consider a 1kg mass at rest at the equator.Because of the earths rotation , the mass experiences a centripetal acceleration. a)Draw free body diagram of mass b)Find centripetal force acting in the mass c)Compare apparent weight and true weight d)what fictitious force would the...
February 24, 2011

math
7x9=63
February 24, 2011

chemistry
What is the approximate thermal energy in kJ/mol of molecules at 275° C
February 23, 2011

applied statistics
Discuss how the General Linear Model assigns the optimal “weights” to predictor variables that allow us to maximize prediction accuracy. How are discriminant functions the optimal weighted linear composites for predicting “membership” regarding the ...
February 20, 2011

Science
If the moon rotated on its axis just as quickly as Earth's, would we always see the same side of the moon? Explain. -thanks, Sandra
February 19, 2011

Office Management
One taxicab charges 75 cents for the first quarter-mile and 15 cents for each additional mile. The competing taxi company charges $1.00 for the first quarter-mile and 10 cents for each additional mile. 1. what distance would produce the same fare for the two taxi companies? 2...
February 17, 2011

Science
the answer is B
February 16, 2011

Science
when comparing the force that is required to climb a mountain walking up a trail that slopes gently upward to the top verses getting there by scaling a sheer vertical face, which of the following is true? (a) you use more force for a giving movement on the walk than on the ...
February 16, 2011

math
a small mail order company earns a 15% profit on all sales. if the company earned $5250 one month, how much were the total sales.?
February 16, 2011

ap chemisrty
Kp for the following reaction is 0.16 at 25°C. 2 NOBr(g) 2 NO(g) + Br2(g) The enthalpy change for the reaction at standard conditions is +16.3 kJ. Predict the effect of the following changes on the position of the equilibrium; that is, state which way the equilibrium will ...
February 15, 2011

math
width=w length=4w P=2(l+w) =2(4w+w) =10w
February 15, 2011

world history
idk
February 14, 2011

math
Stacy multiplied 5x9 and said the answer was 44. What two patterns could you use to show that her answer is not correct?
February 13, 2011

Chem 262
What solvents would you use to isolate these compounds? Malonic Acid Salicylic acid Ethyl4-aminobenzoate
February 10, 2011

Algebra
I cant write the sign for square root so I will just write it out. The problem says to simplify square root 5w^8v square root 20xu^2 I don't know how to figure out this problem.
February 4, 2011

ap chemisrty
When heated, cyclopropane is converted to propene. Rate constants for this reaction at 470°C and 510°C are k = 1.10 10-4 s-1 and k = 1.02 10-3 s-1, respectively. Determine the activation energy, Ea, from these data.
January 27, 2011

chemistry
he decomposition of nitrogen dioxide at a high temperature is second order in this reactant. NO2(g) NO(g) + 1/2 O2(g) The rate constant for this reaction is 3.40 L/mol·min. Determine the time needed for the concentration of NO2 to decrease from 2.30 mol/L to 1.30 mol/L.
January 27, 2011

science
Does the mass of water increase when a plastic water bottle filled to the brim with water is frozen?
January 26, 2011

Math 1 9th grade
A bag contains 3 green marbles and 6 blue marbles. What is the probability of drawing a blue marble, then another blue marble, then a green marble, replacing the marble after each draw?
January 20, 2011

economics
Suppose the USA and Canada are considering to trade. Assume there are only two goods in the economy: wheat and corn. The table below illustrates what each country can produce in a given year. Wheat Corn USA 4 2 Canada 5 8 In this case, which country should produce wheat? Why? ...
January 18, 2011

world issues
Identify at least two issues in developing countries that make changing to democracy easier or more difficult. Provide at least one real world example of one of the issues that you identify.
January 16, 2011

Philosophy
What ideas and events in Europe influence philosophy in the USA. How are these philosophies similar and different?
January 12, 2011

algebra
sorry about the mix up of 2001 and 2002, but the process is still the same
January 8, 2011

algebra
the difference between 1995 and 2001 is 6 years, so you add 6 to 73.7 and you get 0.6t+73.7, that's the first set of answers. Next, you replace the t with the 11 to represent the difference between the next set of years (1995 to 2006) so the next set of answers is E(11)= ...
January 8, 2011

practical nurse
in a 150 words state how you can contribute quality service to health care
January 4, 2011

algebra
it john 4 hours to mow a lawn it takes maria 3 hours to mow the same lawn, how long would it take if they worked together?
December 18, 2010

C Chemisty
What mass of hyudrogen peroxide should result when 1.50 g of barium peroxide is reacted with 25.0 mL of 0.50 M of hydrochloric acid?
December 13, 2010

Algebra
If Dale can paint a room in 5 hours alone and Chip can paint the same room in 7 hours alone. How long would it take them together to pain the room?
December 3, 2010

math
what type of math problems exemplify the different purposes of variable, and in what way do these different uses of variable can be confusing?
November 30, 2010

math
P=4xL or P=4L
November 30, 2010

statistics
given variables list them as independent (x) or as a dependent (y) I weight of child; prescription dosage II monthly commision; monthly sales II ability to concerntrate; level of fatique IV crop yield; rainfall
November 25, 2010

the president and the bureaucracy
yes there are acts of congress, regulatory rulings, court rulings, the will of the people
November 23, 2010

the president and the bureaucracy
legally, the bureaucracy derives the general authority for its programs from
November 23, 2010

Algebra
5x+2y=-11, 7x-3y=13, find x and y
November 20, 2010

math
How would I setup the equation for the perimeter and area of a similar (6inch width, and 8 inch length)rectangle that is increased by a ratio of 1:n?
November 16, 2010

7grade math
Thank you I came to the same conclusion I just wanted to see if I was going in the right direction
November 16, 2010

7grade math
using ratio 1:2 find the perimeter of rectangle that has a width of 6 inches and a length of 8 inches? need answer asap
November 16, 2010

College Chemistry
Stuck on plugging info into formula, please show set up-At 10 degrees C carbon dioide gas has volume of 25.5 mL under pressure of 758 mmHg, what would volume of CO2 be at STP?
November 9, 2010

Chemistry
Dr. Bob get the use PV=nRT just stuck on setting up the problem help!
November 9, 2010

Chemistry
Amber, Too funny i have this same question for ec College Chem at Terra! In book page 303, 35 b. Answer back of text lol!!!
November 9, 2010

Chemistry
If 20.0 g of N2 has a volume of 4.00 L and a pressure of 6.0 atm, what is its temperature?
November 9, 2010

Chemistry
A mixture of hydrogen and oxygen gas has pressure of 1.60 atm. Partial pressure of oxygen is 304 mmHg atm, what is the partial pressure of hydrogen?
November 9, 2010

chemistry
what is the net ionic equation for manganese sulfide and hydrobromic acid?
October 19, 2010

6th grade math
in the order of operations equation 8-(24/8)^2 I Alex answered with 24/8= 3 3^2 = 9 8 - 9 = answer You cannot subtract 9 from 8. So how do you get the answer?
October 8, 2010

6th grade
how do you solve the math order of operations problem 8-(24/8)^2
October 8, 2010

Algebra
Help please-I'm doing something wrong- Solve 8x^2 + 6x + 5 = 0 I'm doing square roots and all the steps but it's not working out I come up with -0.38 + 0.5 and -0.38 - 0.5 But it's not right when I go to put it back in. Could you please show the steps-these ...
October 6, 2010

5th grade
what major landform is west of the west amazon basin?
October 5, 2010

Physics
A disconcerted dog of a mass 7.80 kg is sliding down a frictionless plank which is inclined at an angle of 48.0 degrees to the horizontal. Calculate the force which accelerates the dog down the plank.
October 1, 2010

french
what does arrondis le nombre 160 795 a la dizaine de mille pres mean ?? and answer plzz
September 24, 2010

Business Math
Calculate the simple interest and maturity valve for the following problems. Round to the nearest cent as needed. 18,000,4 1/2%,18mo.
September 21, 2010

math
sixty seven thousand or six hundred seventy hundreds
September 20, 2010

Math
Rewrite rational exponent 3sqrt22
September 20, 2010

COM156
Identify three challenges that may arise when writing a paper. Explain the strategies you will use to overcome those challenges.
September 19, 2010

statistics
the quality control inspector of a production plant will reject a batch of syringes it two or more defective syringes are found in a random sample of ten syringes taken from the batch. suppose the batch contains 2% defective syringes. What is the probability that the batch ...
September 12, 2010

algebra
1/16 basically you just solve 4^-2
September 11, 2010

hardware
What types of computer hardware would make your work life more efficient?
September 11, 2010

COM 156
Identify three challenges that might arise when writing a paper. Explain the strategies you will use to overcome those challenges.
September 1, 2010

statistics
Why am I stuck? How do I figure I must be really stressed because I cannot figure this out. you exmple 9.408^2 =88.51046? How do you get it? I have squared 9.408 on calculator and get 3.08 what am I missing?
August 22, 2010

geometry
in diagram below ab parallel to cd what is the value of x
August 12, 2010

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