# Posts by Sha

Total # Posts: 140

**math**

ab and ac are tangents to a circle with centre o. if angle bac is equal to 40 degree, find angle abc and angle acb.

**math**

the answer is 72 duh

**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?

**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.

**Add maths form 4**

I'm really sorry, but how?

**Add maths form 4**

The equation is 2qx(x+1)=-8x^2 -1

**Add maths form 4**

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

**Add maths form 4**

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

**Add maths**

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

**algebra**

seven more than twice a certain number?

**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?

**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.

**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?

**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.

**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 ...

**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?

**science**

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

**science**

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

**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:

**math**

Find the intersect point for the two equations: x = 2; y = -3

**American History**

preacher and healers

**EARTH SCIENCE**

number 0ne is d

**math**

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

**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 ...

**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)

**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)

**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?

**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...

**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...

**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?

**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.

**chem**

how many mL of a .094 M NaOh are needed to neutralize 21.4 mL of .160 M HCL

**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....

**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....

**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 ...

**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 ...

**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

**math..urgent pleasehelp :(**

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 ...

**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 ...

**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...

**math**

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

**chemistry**

what is thbe total number of molecules of so2 in a 0.10 mole same of so2

**Chemistry**

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

**Chemistry**

Balance the Following Equations. _MgSo3+_HNO3->_Mg(NO3)2+_H2SO3

**writing**

use the word girls in a sentence

**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

**Philsophy**

How the majority can have intransitive preferences without anyone's preferences being intransitive?

**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

**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

**acct**

which account will not appear on an after -closing trial balance?

**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!

**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!!

**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?

**English help**

There is nothing.

**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 ...

**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 . :)

**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?

**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 ...

**probability**

nevermind got the answer already

**probability**

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

**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?

**math**

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

**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?

**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!!

**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 ...

**research paper**

right, thanks again Ms.SUe

**research paper**

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

**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?

**research paper**

Is fast food a good topic for research paper?

**math.please help!**

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 ...

**math.please help!**

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 ...

**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?

**math**

the rite ans. is 36500

**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?

**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

**math**

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

**math. help please!!**

yeah its the first one. thank you!

**math. help please!!**

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

**math**

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

**math**

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

**eng**

okay. thank you ms. Sue!

**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.

**math**

how will you solve these equations using matrices x+y=1 and 3x-2y=4/3

**eng.**

thank you!!. was just making sure

**eng.**

is it letter c?

**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 ...

**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 ...

**Algebra**

x - y = 3

**english**

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

**english**

its the supporting details. isnt it? anyone?

**english**

what comes next after the topic sentence?

**concrete**

thank you Ms.Sue and Writeacher!! (:

**concrete**

can anyone define and give me examples of "concrete details" please?

**Statistics**

the answer is .0.0439805 so its .044

**finitemath**

thanks a million!

**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 ...

**fintemath**

oh nevermind.. i got it. thanks for helping me Ms. Sue (:

**fintemath**

what happened to 2L? sorry for my dumb question.

**fintemath**

i know 90 is the perimeter but where did the 4W + 2W come from?

**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