# Posts by David

Total # Posts: 2,249

**math**

sorry, i made a mistake, for mutually exculsive events, P(EnF)= 0, hence, from the previous equation, 0.3=0.2+P(F)-0 so P(F)= 0.1

*July 27, 2010*

**math**

Let P(F)= X since E and F are independent eveents, P(EnF)= P(E)* P(F) therefore, P(EnF)= 0.2X but P(EuF)=P(E)+ P(F)- P(EnF) 0.3= 0.2 + x - 0.2x x = 1/8

*July 27, 2010*

**Excel**

What is the formula to figure out these two problems?

*July 25, 2010*

**math**

Corrine has 3 quarters, 7 dimes, 6 nickels, and 4 pennies in her pocket. If one coin falls out, what is the probability that it will not be worth more than $0.10? 3/20 7/20 1/2 17/20

*July 22, 2010*

**Probability**

If you toss 4 coins, what is the probability of getting exactly 1 head and 3 tails? 1/16 1/4 3/8 1/2

*July 22, 2010*

**physics**

boat is m1 = 300 kg Isaac is m2 = 62 kg towards dock is + away from dock is - original velocity of both is v = +0.50 m/s v2' = final velocity of Isaac v1' = final velocity of boat v2'-v1' = +3.0 m/s (because Isaac jumps off the front of the boat & is moving ...

*July 21, 2010*

**physics**

boat is m1 = 300 kg Isaac is m2 = 62 kg towards dock is + away from dock is - original velocity of both is v = +0.50 m/s v2' = final velocity of Isaac v1' = final velocity of boat v2'-v1' = +3.0 m/s (because Isaac jumps off the front of the boat & is moving ...

*July 21, 2010*

**9gr**

Caleb scored the following on his first four tests: 78, 84, 88, and 82. What is the least grade he can receive on his next test to have an average of 85 for the five tests? a.66 b.83 c.93 d.100

*July 19, 2010*

**Pythagorean Theorem**

Which is closest to the length of the diagonal of a square whose sides measure 20 cm? a.20 cm b.28 cm c.40 cm d.200 cm

*July 15, 2010*

**Pythagorean Theorem**

NOP

*July 15, 2010*

**Pythagorean Theorem**

Pythagorean Theorem - david, Thursday, July 15, 2010 at 2:10pm EFG 3,6,9 HIJ 60,156,144 KLM 56,102,105 NOP 36,48,64 The following are the lengths of the sides of four triangles. Which is a right triangle? a.Triangle EFG b.Triangle HIJ c.Triangle KLM d.Triangle NOP

*July 15, 2010*

**Pythagorean Theorem**

EFG 3,6,9 HIJ 60,156,144 KLM 56,102,105 NOP 36,48,64 The following are the lengths of the sides of four triangles. (See assignment sheet for chart). Which is a right triangle? a.Triangle EFG b.Triangle HIJ c.Triangle KLM d.Triangle NOP

*July 15, 2010*

**Pythagorean Theorem**

7. The following are the lengths of the sides of four triangles. Which is a right triangle? Triangle EFG Triangle HIJ Triangle KLM

*July 15, 2010*

**Pythagorean Theorem**

28 cm

*July 15, 2010*

**Pythagorean Theorem**

Which is closest to the length of the diagonal of a square whose sides measure 20 cm?

*July 15, 2010*

**Pythagorean Theorem**

24 ft

*July 15, 2010*

**Pythagorean Theorem**

A ladder resting against the side of a building reaches 32 ft up the building. If the ladder is 40 ft long, how far from the building is the base of the ladder?

*July 15, 2010*

**9th grade**

The lengths of 2 legs of a right triangle are 16 cm and 30 cm. What is the length of the hypotenuse?

*July 15, 2010*

**Chemistry**

molarity is .1 for all substances, volume of HCl and HC2H3O2 is 8.00ml each, both diluted in 100ml of water

*July 14, 2010*

**algebra**

solve by square root property (8x-3)squared=5

*July 10, 2010*

**college chemistry**

calculate the pressure exerted by 1.00 moles of CO2 confined in a volume of 5.00 L at 450. K. Compare the pressure with that predicted by the ideal gas equation.

*July 8, 2010*

**college chemistry**

so the answer would be18.5 atm using the formula p= nRt/V correct?

*July 8, 2010*

**college chemistry**

calculate the pressure exerted by 2.50 moles of CO2 confined in a volume of 5.00 L at 450K. Compare the pressure with that predicted by the ideal gas equation.

*July 8, 2010*

**math**

Find the derivative of the function. y = (x^2+8x+3)/square root of x

*July 4, 2010*

**intermediate algebra**

3(5-7)^8 divide 4

*June 30, 2010*

**chemistry**

Thank you

*June 18, 2010*

**chemistry**

If 20 mL of 0.10 M NaOH are added to 30 mL of 0.20 M HOAc, what is the pH of the resulting solution? (Ka = 1.8 ´ 10-5 for HOAc.)

*June 18, 2010*

**Comm/215**

Q: To succeed in the new economy, workers will have to learn throughout their careers, adapt to changing circumstances, and self-motivation will be needed. Parallel Constructtion A: and self-motivate when needed. is this correct?

*June 17, 2010*

**Comm/215**

Q: Some students hate math, some students dislike math, and math is liked by other students. Parallel Construction A: Some students hate math, some dislike math, and some like math. Is this correct?

*June 17, 2010*

**Comm/215**

Have you ever read the story, "The Tell-Tale Heart," by Edgar Allan Poe? Dave asked. Have I written this correctly?

*June 17, 2010*

**Comm/215**

Did the professor say “Put down your pencils?” Janice asked. I wrote this is it correct?

*June 17, 2010*

**Comm/215**

Q: People know they are going to have to retire. They often don't save enough money to do so comfortably. Have to make one subordinate. Peaople know they are going to have to retire, often they don't save enough money to do so comfortably. Is this right?

*June 17, 2010*

**Comm/215**

Q: The hurricane destroyed some oil rigs. Fuel prices rose. How do I make one subordinate to the other. The hurricane destroyed some oil rigs, and fuel prices rose. Is this correct?

*June 17, 2010*

**Comm/215**

Q: One of my friends want to attend my graduation ceremony. I hae to make subject and verb agree, should I change want to wants?

*June 17, 2010*

**Comm/215**

Some test are so hard that no one does well on them. Other test are too easy and don't really test comprehension. Is this right?

*June 17, 2010*

**Comm/215**

Q: Some tests are so hard that no one does well on them other tests are too easy and don't really test comprehension. A: Some tests are are so hard that no one does well on them, other test are too easy and don't really test comprehension. Is this correct?

*June 17, 2010*

**Comm/215**

Studying is hard work; many students find they study better when they take regular breaks. Is this right?

*June 17, 2010*

**Comm/215**

Q: Studying is hard work many students find they study better when they take regular breaks. A: Studying is hard work, many students find they study better when they take regular breaks. Is this correct?

*June 17, 2010*

**Comm/215**

So I need to write The White Sox are a really good at the fundamentals of baseball, which is why they won the World Series in 2005.

*June 17, 2010*

**Comm/215**

Q: The White Sox are really good at the fundamentals of baseball. Which is why they won the World Series in 2005. A: The White Sox are really good at the fundamentals of baseball; which is why they won the World Series in 2005. Is this correct?

*June 17, 2010*

**Comm/215**

There are two reasons why I like baseball; it is fun and good exercise. Is that what you mean?

*June 17, 2010*

**Comm/215**

Q: There are two reasons why. I like baseball. It is fun. And good exercise. A: There are two reasons why I like baseball, it is fun and good exercise. Is this correct?

*June 17, 2010*

**Comm/215**

Many times people will ask a writer where ____ gets ____ ideas. __ they /their __ he / his __ she /her __ he or she /his or her he or she / his or her correct?

*June 17, 2010*

**Comm/215**

A venture capitalist has to be willing to take risks when ___ invests ___ money. __ they /their __ he / his __ she /her __ he or she /his or her Answer he or she / his or her Correct?

*June 17, 2010*

**Comm/215**

Some interviewers ____ have a clear sense of what they want in an employee, ask very tough questions. __ who __, who __ which __ that , who is correct?

*June 17, 2010*

**Comm/215**

I had hoped the police would blame Bruce, not ___. __ me __ myself __ mineself __I Would me be the correct answer?

*June 17, 2010*

**Comm/215**

Investing in pure research ___ yields no immediate profit, can be hard to justify when a company is in financial difficulties. __ who __ which __ , which __ that , which is would be correct?

*June 17, 2010*

**Comm/215**

In retrospect, Jason shouldn't have taken that important business call right after he had been___. __ awake __ awaked __ awakened __ awaken The answer is awakened, correct?

*June 17, 2010*

**Comm/215**

Thats what I was thinking bad question. Thank you.

*June 17, 2010*

**Comm/215**

That is why I thought it was became, I can only pick become becomed became had became I thought had become but I do not have that option.

*June 17, 2010*

**Comm/215**

I was surprised by how successful Janice ____. had became or became? They both sound correct.

*June 17, 2010*

**comm/215**

There are two reasons why I like baseball. It is fun and good exercise. How does this look?

*June 17, 2010*

**comm/215**

Would this be a Ambiguous reference?

*June 17, 2010*

**Comm/215**

The company president inspired his employees, charmed the press, and redefined his company's strategic plan. This is parallel, correct? inspired, charmed, redefined

*June 17, 2010*

**Comm/215**

Will paint should be paints.

*June 17, 2010*

**Comm/215**

The clown juggles, makes balloon animals, and will paint faces. I think this sentence is parallel, am I correct?

*June 17, 2010*

**Comm/215**

Dave hoped that HE and Steve would win the tennis tournament. Would HE be correct?

*June 17, 2010*

**Comm/215**

I think this is a Ambiguous reference, would I be correct When one buys insurance, you need to be clear about your needs.

*June 17, 2010*

**Comm/215**

So this would be a Ambiguous reference.

*June 17, 2010*

**Comm/215**

In this sentence there is no pronoun error, correct? Sarah told Janice that she made the honor role.

*June 17, 2010*

**Comm/215**

I am trying to understand these pronouns. The sentence below is a number shift, corret? The teacher said they were going to grade the test over the weekend.

*June 17, 2010*

**Comm/215**

Thank you, do you have a pronoun link? I have to decide if sentences have these Pronoun shift in number Pronoun shift in person Ambiguous reference

*June 17, 2010*

**Comm/215**

Thank you, this stuff is very confusing to me.

*June 17, 2010*

**Comm/215**

Run-on sentence

*June 17, 2010*

**Comm/215**

I like chocolate she likes butterscotch. __ Sentence fragment __ Comma splice __ Run-on sentence __ Complete sentence (contains no error)

*June 17, 2010*

**Comm/215**

Thank you, do you have a pronoun link? I have to decide if sentences have these Pronoun shift in number Pronoun shift in person Ambiguous reference

*June 17, 2010*

**Comm/215**

Sorry I had already posted he answer before you posted the link for me. It is a complete sentence, correct?

*June 17, 2010*

**Comm/215**

Complete sentence

*June 17, 2010*

**Comm/215**

Comma Splice

*June 17, 2010*

**Comm/215**

While I like bacon, it is not good for me. __ Sentence fragment __ Comma splice __ Run-on sentence __ Complete sentence (contains no error)

*June 17, 2010*

**Comm/215**

Comma Splice

*June 17, 2010*

**Comm/215**

Complete sentence

*June 17, 2010*

**Comm/215**

I don't know what you want me to do, the directions are not clear. __ Sentence fragment __ Comma splice __ Run-on sentence __ Complete sentence (contains no error)

*June 17, 2010*

**Comm/215**

I guess it is a complete sentence then?

*June 17, 2010*

**Comm/215**

Comma splice

*June 17, 2010*

**Comm/215**

Cats, unlike dogs, are fond of sitting on laps. __ Sentence fragment __ Comma splice __ Run-on sentence __ Complete sentence (contains no error)

*June 17, 2010*

**Comm/215**

Is this a fragment? Using a flashlight, he looked under the bed for his shoes.

*June 17, 2010*

**Comm/215**

Is this a fragment? The local baseball team, needing a good pitcher most of all.

*June 17, 2010*

**Comm/215**

Is this a fragment? That movie, one of my favorites.

*June 17, 2010*

**CAPITALIZATION**

after several winter storms, jeff couldn't wait for the weather to improve.

*June 14, 2010*

**Math**

cot (theta)=-9/8, cos (theta)<0

*June 14, 2010*

**Math**

Thanks

*June 14, 2010*

**Math**

I need help with these problems for a test. 1. Find the inverse of the one-to-one function. f(x)=5x+1/4. 2. The height of the water, H, in feet, at a boat dock t hours after 7 am is given by E=7+4.4cos pi/35 t, where t is time measured in seconds. Find the period. 3. Solve ...

*June 14, 2010*

**Math**

#3 solve on the interval [0,2pi]

*June 13, 2010*

**Math**

I need help with these problems for a test. 1. Find the inverse of the one-to-one function. f(x)=5x+1/4. 2. The height of the water, H, in feet, at a boat dock t hours after 7 am is given by E=7+4.4cos pi/35 t, where t is time measured in seconds. Find the period. 3. Solve the...

*June 13, 2010*

**statistics**

10 soldiers of 500 attempt to climb a 100Ft cliff, they fail in : 57 ft, 73, 81, 78,63,85,41,68,75,88. What is probability of soldiers successfully climbing the cliff?

*June 12, 2010*

**bus210**

• Via Microsoft Word, write 700 to 1,050 words explaining the business model of University of Phoenix and also write a SWOT analysis about University of Phoenix strengths, weaknesses, opportunities, and threats.

*May 30, 2010*

**Logic and Design**

Hi, I need help with my program and logic Homework. Here is the problem: Velma and her husband Victor run a full service veterinary clinic. They would like a program to help them calculate costs for their clients. Victor, who is the vet, charges a flat fee of $100 for medical ...

*May 24, 2010*

**Chemistry**

Determine whether a solid forms when solutions containing the following salts are mixed. (Express your answer as a chemical equation. Identify all of the phases in your answer) NaF and AgNo3 MnSO4 and Na2CO3

*May 24, 2010*

**EDU**

Need this answered in a few good sentences

*May 21, 2010*

**6th Grade Social Studies**

What factors affect the enviroment?

*May 18, 2010*

**Physics**

A scaffold of mass 60 kg and length 5.0 m is supported in a horizontal position by a vertical cable at each end.A painter of mass 80 kg stands at a point 1.5 m from one end. (a)Find the tension in the cable nearer to the painter. (b)Calculate the tension in the second cable

*May 17, 2010*

**Statistics**

#1- The normal distribution had a mean of 14 and standard deviation of 4. There were 30 people in the study group and the average was expected to be 16. The study was tested at the .05 level of significance. What was the power of the study? 74.2% 80.5% 86.4% 92.7% #2- If a ...

*May 14, 2010*

**Chemistry**

2.24M

*May 6, 2010*

**Math**

I've been staring at this problem for an hour and have NO IDEA WHAT TO DO! "A quadratic function in the form f(x)=ax^2+bx+c contains the points (-1,0), (0,2), and (2,0)." a) determine the values of a,b, and, c b) Factorise the expression ax^2+bx+c obtained from ...

*May 4, 2010*

**french**

le samedi, je joue ou tennis avec mon per'e

*May 4, 2010*

**Medical coding Insurance Math**

20$,$ 30.80

*May 1, 2010*

**Chemistry**

250mL x 1L/1000mL x 2.50mol Al(OH)3/1L x 3 mol H2SO4/2 mol Al(OH)3 x 1L/18.0 mol H2SO4 x 1000mL/1L = 52.1mL H2SO4

*April 30, 2010*

**Macroeconomics**

Say you have a 15% inflation rate and a 10% unemployment rate, and inflation is "public enemy number 1", what fiscal and monetary policies could you use to defeat inlfation?

*April 28, 2010*

**algebra**

t=1.8125

*April 28, 2010*