Saturday
December 10, 2016

Posts by Sha

Total # Posts: 139

math
June 10, 2015

physics
a ball dropped from rest at a height of 50 m above the ground. (a) what is the speed just before it hits the ground? (b) how long does it take to reach the ground?
March 10, 2015

physics
a car moving at 30 m/s slows to a speed of 10 m/s in a time of 5 s. determine a.) the acceleration of the car (b). the distance it moves in the third second.
March 10, 2015

I'm really sorry, but how?
January 31, 2015

The equation is 2qx(x+1)=-8x^2 -1
January 31, 2015

The quadratic equation 2qx(x+1)-8x^2-1, where q is a constant, has no real roots. Find the range of values of q. Answer given is -2<q<4
January 31, 2015

Given that the quadratic equation hx^2 - 4kx + 9h =0 has two equal roots, find the ratio h:k The answer given is 4:6. I need to know the method pls... Thx in advance
January 26, 2015

one of the roots of the equation x^2 - 2qx + 2q +4 = 0 is three times the other root, determine the value q
January 23, 2015

algebra
seven more than twice a certain number?
October 2, 2014

math
If a plant has a linear growth rate and 1 day after planting is 2x+4 and day four is 4x+8 Wgat is the growth rate?
May 21, 2014

Chemistry
Balance the redox equation. It occurs in acid solution. Sn(s) + H+(aq) = Sn2+(aq) + H2(g) I understand that first the equation needs to be put into halves. Sn(s) = Sn2+(aq) and H+(aq) = H2(g) Then, Sn(s) = Sn2+(aq) + 2e- and ? From here I am lost. Please help.
April 30, 2014

Chemistry
The following reaction is reactant-favored at equilibrium at room temperature. COCl2(g) = CO(g) + Cl2(g) Will raising or lowering the temperature make it product-favored?
April 30, 2014

Chemistry
The standard free energy change, delta f G, for the formation of NO (g) from its elements is +86.58 kJ/mol at 25 degrees C. Calculate Kp at this temperature for the equilibrium 1/2 N2(g) + 1/2 O2(g) = NO(g) Comment on the sign of delta G and the magnitude of Kp.
April 30, 2014

Chemistry
Which substance has the higher entropy? a.) a sample of pure silicon (to be used in a computer chip)or a piece of silicon containing a trace of another element such as boron or phosphorus b.) O2(g) at 0 degrees C or O2(g) at -50 degrees C c.) I2(s) or I2(g), both at room ...
April 30, 2014

math
Steve earned scores of 96 and 87 on his first two exams. What will his average grade be if he gets a 72 on his third exam?
April 27, 2014

science
The chicken got in the way? LOL, sry I need sleep and math break.
April 13, 2014

science
any animal lighter then it running at the same speed, duh ;-)providing it isn't eaten 1st
April 13, 2014

math
Good 1 Steve so I sux at math but your here :) Heres another: X = [students playing football], Y = [students playing baseball], and Z = [students playing rugby]. Draw a Venn diagram of Z – (X U Y), and write a sentence describing what the set represents:
April 13, 2014

math
Find the intersect point for the two equations: x = 2; y = -3
April 13, 2014

American History
preacher and healers
January 28, 2014

EARTH SCIENCE
number 0ne is d
January 7, 2014

math
felix has 2 yards of ribbin. He needs 1/4 yard to make 1 bow. how many bows can felix make?
December 11, 2013

human body
a friend has been taking over-the-counter vitamins and minerals because he heard that some of them can boost energy levels and immune system function. he begins experiencing fever, nausea, and recurrent kidney stones. based on these symptoms, what might you expect the problem ...
March 30, 2013

Chemistry
Tyr-Trp-Phe-Val-iLe is wrong because of the big bulky tyr,trp, and phe. Anything with Gly is wrong because gly is too flexible which causes it to form other helicies. (This is the feedback given from Sapling)
January 27, 2013

painting
compare and contrast the representation of weight and space in the painting of The Good Shepherd in the Catacomb of Saints Pietro and Marcellino (Image 15-2) and the mosaic of Justinian and Attendants in Ravenna's Church of San Vitale (Image 15-5)
May 31, 2012

math
LOGIC: I plus onehalf of square plus zero plus onehalf of diamond plus center of the sea plus threefourth of X plus zero plus center of the sun?
March 27, 2012

physics
2 masses are connected through a non-stretchable string that passes over a frictionless pulley. The masses of the objects are 12 kg and 5.5 kg respectively. The obj with larger mass is hanging 2.5 m fr the surface of a table. Suppose that the two objs are initially at rest. (a...
January 15, 2012

statistics
An accounting firm is planning for the next tax preparation season. From last year's returns, the firm collects a systematic random sample of 100 filings. The 100 filings showed an average preparation time of 90 minutes with a standard deviation of 140 minutes. What is the...
November 19, 2011

Math
Provide an example of at least five ordered pairs that do not model a function. The domain will be any five integers between 0 and 20. The range will be any five integers between -10 and 10. Why does your example not model a function?
November 10, 2011

science
a scientist has two samples of a substance. both samples have the same temperature. one sample has a mass of 10 g. the other sample has a mass of 20 g. compare the average kinetic energy and total kinetic energy of the particles in each sample.
September 26, 2011

chem
how many mL of a .094 M NaOh are needed to neutralize 21.4 mL of .160 M HCL
June 13, 2011

Phar Science
In a sedimentation experiment using a centrifuge rotating at 20,000 rpm at 25°C the position of the boundary between the settled phase and the supernatant for a protein was found to be at 6.153 cm at t = 300 s, 6.179 at 600 s, and 6.206 at 900 s. If D for the protein is 7....
April 5, 2011

Phar Science
In a sedimentation experiment using a centrifuge rotating at 20,000 rpm at 25°C the position of the boundary between the settled phase and the supernatant for a protein was found to be at 6.153 cm at t = 300 s, 6.179 at 600 s, and 6.206 at 900 s. If D for the protein is 7....
April 5, 2011

Phar Science
A researcher in Urumqi drops a rhodium ball of diameter 4.20 mm through a dilute aqueous solution of a high molar mass natural gum contained within a glass tube which has four graduations marked 10 cm apart. It is 18 C in the laboratory and the ball takes 1.86 seconds to fall ...
April 5, 2011

Phar Science
The following data were obtained for solutions of carboxymethylcellulose flowing through a capillary viscometer. Concentration (g/L) 0 0.1 0.2 0.3 0.4 0.5 0.6 0.8 Time (s) 64.2 68.4 72.7 77.1 81.5 86.1 91.0 100.5 The Mark-Houwink-Sakurada parameters for carboxymethylcellulose ...
April 5, 2011

math
Page 9 of 9 What is the probability that a point chosen at random on segment PQ will be between -1 and 3? -5 through 5
April 1, 2011

the purchasing power (in dollars) of an annual amount of A dollars after t years of 5% inflation decays according to P= Ae^-0.05t a) how long will it be before a pension of \$60,000 per year has a purchasing power of \$30,000 b) how much pension A would be needed so that the ...
March 3, 2011

Public Finance
Your state has a retail sales tax of 10 percent but it exempts food, prescription drugs, and all services including housing services, repair services, and consumption of electricity and other public utility services. Use supply-and-demand analysis to explain how the prices of ...
February 7, 2011

Public Finance
Explain why using the local property tax to finance a given quantity and quality of public schooling can result in low tax rates in rich jurisdictions but high tax rates in poor jurisdictions. How do state governments supplement local finance of education to insure equality of...
February 7, 2011

math
the perimeter of a rectangular floor mat is 42 inches, if the width is 9 inches, what is the length?
January 24, 2011

chemistry
what is thbe total number of molecules of so2 in a 0.10 mole same of so2
January 23, 2011

Chemistry
Balance The Following Equations. _SnO2+_Ba(OH)2->_Sn(OH)4+_BaO _Al(OH)3+_(HG2)3_Po4)2->_AlPO4+_HG2(OH)
January 4, 2011

Chemistry
Balance the Following Equations. _MgSo3+_HNO3->_Mg(NO3)2+_H2SO3
January 4, 2011

writing
use the word girls in a sentence
December 6, 2010

MS office Acess 2007
Determining Table Fields Which should not be included as fields in a table? Choose all that apply. A - Small fields B - Region fields C - Yes/No fields D - Calculated data E - Numbered fields F - Separate name fields
October 25, 2010

Philsophy
How the majority can have intransitive preferences without anyone's preferences being intransitive?
October 13, 2010

financial acct
how will I journalize this transaction? Rented a backhoe to Mission Landscaping at a price of \$250 per day, to be paid when the backhoe is returned. Mission Landscaping expects to keep the backhoe for about two or three weeks
September 27, 2010

acct.
how will I journalize this transaction? Rented a backhoe to Mission Landscaping at a price of \$250 per day, to be paid when the backhoe is returned. Mission Landscaping expects to keep the backhoe for about two or three weeks
September 26, 2010

acct
which account will not appear on an after -closing trial balance?
September 22, 2010

Ethics
How there can be an ethics which does not focus on right action? can anyone help me figure out what this question means and/or how to answer it? thanks in advance!
September 16, 2010

math
In how many ways can the selection be made if no more than one ball point pen is selected? this is the real question not the other one!!
September 16, 2010

math
Assume that the student has a cup with 14 writing implements: 7 pencils, 5 ball point pens, and 2 felt-tip pens. How many such subcommittees are possible if each subcommittee must contain at least 1 and no more than 2 Republicans?
September 16, 2010

English help
There is nothing.
August 19, 2010

English help
it is second paragraph. I want to tell you English is my second language.I try my best to do it in right way . After the death of Enkidu .He asks him self does this mean I have to die too? This thinking changes his direction. It is not doubt to say that Enkidu‘s death ...
August 19, 2010

English plz help me .
okay .I am working on it . This time I ll submit complete essay,because I have to submit online very soon . This is not ESL cls ,it is world Literature class. any way thank you so much . :)
August 19, 2010

probability. review questions
1)what is the probability that a seven-digit phone number has one or more repeated digits? 2) five letters, with repetition allowed, are selected from the alphabet. what is the probability that none is repeated?
July 28, 2010

probability
you are to set up a code of consisting of three letters (A to Z) and five numbers (0 to 9). a) how many codes are possible if the letters and numbers can be repeated? b) how many codes are possible if each letter and digit can be only used once? c) how many codes are possible ...
July 27, 2010

probability
July 27, 2010

probability
how many different 10-letter words (real or imaginary) can be formed from the letters in the word MONOCHROME?
July 27, 2010

math problem
In a raffle 1000 tickets are being sold at \$1.00 each. the first prize is \$100, and there are 3 second prizes of \$50 each. by how much does the price of a ticket exceed its expected value?
July 27, 2010

math
if E and F are independent events, find P(F) if P(E)=0.2 and P(E U F)= 0.3
July 27, 2010

math problem
two cards are drawn at random (without replacement) from a regular deck of 52 cards a) what is the probability that the first card is a heart and the second is red? b) what is the probability that the first card is red and the second is a heart?
July 27, 2010

math prob.
Through a mix-up on the production line, 6 defective refrigerators were shipped out with 44 good ones. if 5 are selected at random, what is the probability that at least 2 of them are defective? ty in advance!!
July 25, 2010

math prob.
the purchasing director of a bank has just received a shipment of 100 printers. She has been told that the shipment includes 5 defective printers. She randomly selects two printers and tests them. If both printers work the purchasing director accepts the shipment. what is the ...
July 25, 2010

research paper
right, thanks again Ms.SUe
July 22, 2010

research paper
I want to pick the good one. so, which of the two do you think is better? thank you for helping me!!:)
July 22, 2010

research paper
I want to talk about what fast foods cause to people and the pros and cons of fast foods. stuff like that or why do people love fast foods such as Mcdonalds, taco bell, burger king etc. even though they know that they're unhealthy?
July 22, 2010

research paper
Is fast food a good topic for research paper?
July 22, 2010

set up the linear programming problem. Do not solve. A brewery manufactures three types of beer-lite, regular and dark. Each vat of lite beer requires 6 bags of barley, 1 bag of sugar, and 1 bag of hops. Each vat of regular bear requires 4 bags of barley, 3 bags of sugar, and ...
July 19, 2010

minimize z= 5x + 9y subject to 6x + y >= 18 2x + 3y >= 30 x<= 12 x,y>= 0 find the corner points, ans subject the objective function to the corner points, finding the minimum value of z giving the constraints. i know the first and second points but i couldn't ...
July 19, 2010

math..help?
from 1500 lottery tickets that are sold,3 tickets are to be selected for first, second, and third prizes. how many possible outcomes are there?
July 19, 2010

math
the rite ans. is 36500
July 18, 2010

math
A sample of 8 persons is selected for a test from a group containing 40 smokers and 15 nonsmokers. in how many ways can the 8 persons be selected?
July 18, 2010

math
how many diferrent 9-letter words (real or imaginary) can be formed from the letters in the word ECONOMICS? the ans. must be 90,720
July 18, 2010

math
how many different 9-letter words (real or imaginary) can be formed from the letters in the word ECONOMICS?
July 16, 2010

yeah its the first one. thank you!
July 14, 2010

Using only the digits 0 an 1, how many different numbers consisting of 8 digits can be formed?
July 14, 2010

math
the withdrawal is to be \$500 per month for 36 months at 10% compounded monthly, find the present value of annuity.
July 13, 2010

math
after twelve monthly deposits of \$400 at 12% compounded monthly, find the amount of an annuity. please help me:(
July 13, 2010

eng
okay. thank you ms. Sue!
June 27, 2010

eng
can anyone check my grammar please? The main problems Arnold Schwarzenegger must focus on are the immigration issues, college tuition costs and high unemployment.
June 27, 2010

math
how will you solve these equations using matrices x+y=1 and 3x-2y=4/3
June 27, 2010

eng.
thank you!!. was just making sure
June 26, 2010

eng.
is it letter c?
June 26, 2010

eng.
Which of these statements is true? a) Sensory details distract readers; therefore, writers should avoid using them. b) Sensory details show readers that the writer is a sensitive person. c) Sensory words make writing come alive because we understand the world through the five ...
June 26, 2010

English
Which of these statements is true? a) Sensory details distract readers; therefore, writers should avoid using them. b) Sensory details show readers that the writer is a sensitive person. c) Sensory words make writing come alive because we understand the world through the five ...
June 26, 2010

Algebra
x - y = 3
June 25, 2010

english
oh lol okay thanks.. didn't see your post :] ty!! P.S. yall are very helpful!!
June 25, 2010

english
its the supporting details. isnt it? anyone?
June 25, 2010

english
what comes next after the topic sentence?
June 25, 2010

concrete
thank you Ms.Sue and Writeacher!! (:
June 25, 2010

concrete
can anyone define and give me examples of "concrete details" please?
June 25, 2010

Statistics
the answer is .0.0439805 so its .044
June 25, 2010

finitemath
thanks a million!
June 23, 2010

finitemath
a store sells cashews for \$5.00 per pound and peanuts for \$1.50 per pound. the manager decides to mix 30 pounds of peanuts with some cashews and sell the mixture for \$3.00 per pound. how many pounds of cashews should be mixed with the peanuts so that the mixture will produce ...
June 23, 2010

fintemath
oh nevermind.. i got it. thanks for helping me Ms. Sue (:
June 23, 2010

fintemath
what happened to 2L? sorry for my dumb question.
June 23, 2010

fintemath
i know 90 is the perimeter but where did the 4W + 2W come from?
June 23, 2010

fintemath
dimension of a floor; the perimeter of a rectangular floor is 90ft. find the dimensions of the floor if the length is twice the width
June 23, 2010

stats:find the mean
please help! i know exactly how to find the mean but i am having a problem finding the midpoints. couldn't get them right :( salary employees 5,001- 10,000 == 16 10,001-15,000 == 15 15001-20,000 == 11 20,001-25,000 == 15 25,001-30,000 == 23
May 15, 2010

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