Wednesday
July 23, 2014

Posts by David


Total # Posts: 1,619

Statistics
any help?

Statistics
A superstore manager wishes to give out a survey to a sample of 25 of its workers. It wants the sample to be a good representation of the workers. The table shows the numbers of workers in each section of the work force: Working tills: 32 Stacking shelves: 24 Office/managers: ...

statistics
Could you rephrase that please, I'm not getting the logic.

statistics
any help?

statistics
There are 50 members. Melvin wants to collect some infromation from seven of them. Explain how he can do this using the following set of random numbers: 86, 13, 84, 10, 07, 30, 39, 65, 97, 96, 88, 12, 39, 26, 04, 89

Algebra I
A rectangle has a width of 6x+7, a length of 13 How do I get the area?

science
More oxygen will ___________ in colder water than in warmer water.

Physics
In a cyclotron (one type of particle accelerator), a deuteron (of mass 2.00 u) reaches a final speed of 8.4% of the speed of light while moving in a circular path of radius 0.551 m. What magnitude of magnetic force is required to maintain the deuteron in a circular path?

Chemistry
Oh thank you!

Chemistry
so did I do it right?

Chemistry
A graduated cylinder massed at 34.56g and then 8.6 ml was added of an unkonwn liquid this brought the mass to 45.87g. What is the density? I'm not sure how to go about this. Is the 34.56g unneccessary information? Or, do you subtract 45.87-34.56= 11.31 then do mass 11.31/v...

medical terminology
which of the following is an example of a symptom?

science
microscope lens used to locate the specimen

Biology
not helping !

Biology
Eggs of Amphioxus is : (a)alecithal (b)telolecithal (c)meiolecithal (d)mesolecithal is it A ?

Biology
Human cell

Chemistry
the water will freeze

Algebra
A certain can of iced tea contains 4% of the recommended daily allowance of sodium. The recommended daily allowance is 2500 milligrams. How many milligrams of sodium are in the can of iced tea?

10th grade
A rational number is ____ a real number. a. always b. never c. sometimes its always ???????

personal finance concepts
Donna and Sherman Terrel are preparing a budget for 2010. Donna is a systems analyst with an airplane manufacturer, and Sherman is working on a master's degree in educational psychology. The Terrels do not have any children or other dependents. Donna estimates her salary w...

Math
Hi - there are any number of them, but they're all infinite series: if you go to Wikipedia and look up "pi", you'll find at least fifteen of them in the "Computation in the Computer Age" section of that entry.

criminal justice
Follow Bob Pursley's link on the difference between Morals and Ethics in his response to "Ilisa" a little further down this list: it'll give you some help in at least defining the problem, if not some help answering it.

Statistics
a - either you've just seen something that's phenomenally unlikely, or the coin's owner isn't being truthful about the fairness of the coin. b - you've just seen something that's consistent with the coin's owner's pronouncement that the coin is ...

Statistics
The first thing you need is a random selection of graduates whose salaries can be compared... and that's probably the trickiest bit, because getting a genuinely random selection of graduates could more difficult than you might think. Suppose for example your subject is acc...

math
Oops: I've got the last bit of the explanation of c) incorrect, but I'm sure you can correct it.

math
What fun! a) You can cancel out numbers that are common to the top and bottom of a fraction... but you can't cancel individual digits! b) These examples suggest that a/b + c/d = (a+c)/(b+d). Wrong! c) These examples suggest that {a+(b/c)} - {d+(e/f)} = {(a-d) + (b-e)/(f-d)...

U.S. Government
A depressing, but no doubt accurate explanation. We have a similar system over here in the UK: it's been either "Heightened" or "Extreme" for as long as I've been aware of it - and now that you've spelt it out, I realise I'd actually assume ...

math
This has been posted elsewhere, and is answered there.

math
This has been posted elsewhere, and is answered there.

math
Do you mean how many separate pairings exist between two groups of objects, each of which contains eight elements? If so, the answer is (8 x 8) = 64. The reason I'm slightly cautious about the answer is that I'd have expected the second part of the question to be askin...

PHI103: Informal Logic
I'll have a go at just the first one, because I think it illustrates a point that's worth making. Forget the multiple-choice options for a moment: concentrate on the original statement, which when you rephrase it slightly asserts that the only overdues at the store are...

math
What is the actual question please?

alegebra
Divide any whole number by any other whole number that isn't a factor of it. For example, try dividing 3 by 2. Is the result a whole number?

Algebra
A vehicle uses 1 tablespoon of gasoline to drive 125 yards. How many miles can the vehicle travel per gallon? Round your answer to the nearest mile. (hint: There are 256 tablespoons in a gallon)

Physics Flux
The electric flux through the surface shown in Figure Ex27.10 is 15.0 Nm2/C, and the electric field makes an angle á = 70° with the surface. What is the electric field strength? The surface is a 10cm by 10cm square.

science
ops! b.the science of patterns and relationships

science
c.the science of numbers .???????

science
What is the definition of Mathematics? a.adding and subtracting numbers b.the science of patterns and relationships c.the science of numbers d.a really hard subject

science
????? Please help

science
Which shows the expression below simplified? (3.6 × 10^15) + (1.8 × 10^12) a. 3.60018 × 10^15 b. 3.902 × 10^14 c. 3.618 × 10^15 d. 3.6018 × 10^15

9gr
impossible

8th Grade Algebra
Ok. I wa thinking that! Thank you!

8th Grade Algebra
I think that... 3m - 10 = 2(4m-5) 3m - 10 = 8m - 10 +10 on both sides but the thing is, I'm stumped when i get... 3m = 8m I don't think this is possible but I'm thinknig I'm doing something wrong here so that's why I posted.

8th Grade Algebra
3m - 10 = 2(4m -5)

9gr
1. At 11:00 a.m. a one-meter-high mailbox casts a 0.7-meter shadow. If a pole beside the mailbox casts a 28-meter shadow, how tall is that pole? 400 m 40 m 0.4 m 4 m

9th grade
4g

9th grade
Write an algebraic expression for the phrase. the product of g and 4 a.4g b.g + 4 c.g/4 d.g – 4

9 gr
Write each product in exponential form. 16 × 16 × 16 × 16 × 16 a.5^16 b.16^5 c.16^6 d.16^4 my answer 16^5

10th grade
5x5x5x5=5^4

Algebra
3m - 10 = 2(4m -5)

Science
An airplane flew a distance of 650 km at an average speed of 300km/h. How much time did the flight take?

physics
A truck is stopped at a stoplight. When the light turns green, it accelerates at 2.9 m/s2. At the same instant, a car passes the truck going 12 m/s. Where and when does the truck catch up with the car?

physics
A bike accelerates from 0.0 m/s to 4.1 m/s in 6 s. What distance does it travel? thanks for the help

physics
A bike accelerates from 0.0 m/s to 4.1 m/s in 6 s. What distance does it travel? thanks for the help

Algebra
Sorry I forgot to put in the answer. It's 2d +1/5 = 3/5

Algebra
2d + 1 fifth

5th Grade Math
I'm putting the answer on the right because that's how I'm used to it. so... (3*0.1) + (X) = 0.38 First we do the problems in parentheses. Since we are looking to find X we are not going to do that right now. (3*0.1) = 0.3. Now we subtract that from the equation. 0...

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

Algebra
2d + 1 --- 5

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}

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; hom...

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 perso...

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 g...

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 tow...

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 tow...

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
NOP

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.

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