# 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?

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

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.

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