# Posts by David

Total # Posts: 2,272

**Algebra**

this is 2d + 1 fifth. Sorry the formatting for this problem is incorrect.

**Algebra**

2d + 1 --- 5

**MATH**

11 hotdogs

**Physics**

3 There are two charges +Q and –Q/2 that locate at two positions with a separation of d as shown in Fig. 1. We may put +Q at the origin of the x-axis to facilitate the calculation. (a) Find the electric field for +Q and –Q/2 at the position P. (5 points) (b) What is ...

**Physics**

The figure below shows two pint charges, each of -2Q, fixed on the y-axis at y = +a and at y = -a . A third points charge -Q is placed on the x-axis at x = 2a . Express all algebraic answers in terms of Q, a, and fundamental constants. (a) What is the net force (magnitude and ...

**math**

Find the standard deviation for the data. Round your answer to one more decimal place than the original data. {15,13,31,42,58,78}

**Finance**

7,200 at 10% and 4,800 at 15%.

**Math**

( -4 ) 3 (----) ( 5 ) if you can't read that, negative 4, fifths, squared. -4/5 in parentheses.

**G.A**

What is the answer to the brainteaser NOMMAG

**Chemistry**

What is the freezing point of an aqueous 2.65 m calcium chloride (CaCl2) solution? The freezing point of pure water is 0.0ºC and Kf of pure water is -1.86ºC/m.

**Algebra**

So, I'm thinking based on the sites you given that... body temperature = rational number money owed = rational number home runs = whole numbers Is this correct?

**Algebra**

I have some understanding of this but not quite sure how to do the problem. Direction & problem below. Direction: Tell whether whole numbers, integers, or rational numbers are the most reasonable to describe each. Explain your answer. Problem: body temperature; money owed; ...

**statistics**

4343

**Algebra**

Abby has four times as many pictures as Sally. Abby had 18 more pictures than Sally. How many pictures did each girl have?

**Algebra**

Bill has 12 more than three times the number of baseball cards Chyris has. Bill has 42 cards more than Chris. How many baseball cards does Chris have?

**Algebra**

Thank You Henry

**Algebra**

Randy, Sam, Tim and Will counted the number of puzzles they had solved in two months. Sam has solved twelve more than Tim. Randy had solved seventeen less than Sam.Will had solved twice as many as Randy. They have solved a total of 267 problems. How many puzzles did each ...

**algebra**

6/7s-3/4=4/5-1/7s+1/6

**math**

6/7s-3/4=4/5-1/7s+1/6

**Physics (Static Friction)**

When you take your 1300-kg car out for a spin, you go around a corner of radius 56.9 m with a speed of 15.8 m/s. The coefficient of static friction between the car and the road is 0.75. Assuming your car doesn't skid, what is the force exerted on it by static friction? I ...

**C++ Programming**

I already know how to use Visual C++ Express but I;m having a problem that I can not figure out. So, my problem is below. I go into Skript.rc Push F7 to build the RC script first. Output says... Fatal error RC1015: cannot open include file 'afxres.h' Other sources tell...

**C++ Programming**

Hello. I use Visual C++ 2010 Express and don't know why this is occuring. I go into Skript.rc Push F7 to build the RC script first. Output says... Fatal error RC1015: cannot open include file 'afxres.h' Other sources tell me to replace it with windows.h but then it...

**Chemistry**

A compound on heating gives a crackling sound, a reddish fume, and a gas which relights a glowing splint. the residue is reddish brown when hot and yellow when cold. What are- 1. the compound? 2. the fume 3. the gas 4. the residue?

**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

**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

**Excel**

What is the formula to figure out these two problems?

**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

**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

**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 ...

**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 ...

**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

**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

**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

**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

**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

**Pythagorean Theorem**

28 cm

**Pythagorean Theorem**

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

**Pythagorean Theorem**

24 ft

**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?

**9th grade**

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

**Chemistry**

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

**algebra**

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

**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.

**college chemistry**

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

**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.

**math**

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

**intermediate algebra**

3(5-7)^8 divide 4

**chemistry**

Thank you

**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.)

**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?

**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?

**Comm/215**

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

**Comm/215**

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

**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?

**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?

**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?

**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?

**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?

**Comm/215**

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

**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?

**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.

**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?

**Comm/215**

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

**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?

**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?

**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?

**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?

**Comm/215**

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

**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?

**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?

**Comm/215**

Thats what I was thinking bad question. Thank you.

**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.

**Comm/215**

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

**comm/215**

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

**comm/215**

Would this be a Ambiguous reference?

**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

**Comm/215**

Will paint should be paints.

**Comm/215**

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

**Comm/215**

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

**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.

**Comm/215**

So this would be a Ambiguous reference.

**Comm/215**

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

**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.

**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

**Comm/215**

Thank you, this stuff is very confusing to me.

**Comm/215**

Run-on sentence

**Comm/215**

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

**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

**Comm/215**

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

**Comm/215**

Complete sentence

**Comm/215**

Comma Splice

**Comm/215**

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

**Comm/215**

Comma Splice

**Comm/215**

Complete sentence

**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)

**Comm/215**

I guess it is a complete sentence then?

**Comm/215**

Comma splice

**Comm/215**

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

**Comm/215**

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