# Posts by jenna

Total # Posts: 672

A submarine is travelling parallel to the surface of the ocean at a depth of 626m. It begins a constant ascent in order to reach the surface after travelling a distance of 4420m. The ascent takes 35mins. A.) what angle of ascent or angle of elevation would the submarine need ...

Acid/Base Chemistry
A 497 mL sample of 0.9960 M HI is mixed with 443 mL sample of KOH (which has a pH of 13.51). What is the pH of the resulting solution? What are the steps to solving this problem? I think you need to find the concentration of OH by taking 10^-pOH, and then do an ICE table from ...

Geometry
for each parallelogram find the measures of the angles formed by extending two adjacent side through their common vertex: angle is 90 degrees

Math quick question
Thank u so much:)

Math quick question
Create a system of linear equations with this situation: Megan considers two different car rental options. One option costs \$19 per day plus \$0.12 per kilometre . Another option costs \$42.50 per day for unlimited kilometres . Thanks :)

phyics
did you ever figure out the answer? I'm doing this problem now and i can't figure it out

science
An elevator in a high rise building accelerates and decelerates at the rate of 1 foot per second squared. Its maximum speed is 8 feet per second. It starts from rest, accelerates to its maximum speed and stays at that maximum speed until it approaches its destination where it ...

Math
15+37=

Socials
If in Napoleon Bonaparte's perspective, what was the best form of government did he want and why would this be good for the country(France)? Doing a project where you make a campaign trying to persuade people to vote for you(Napoleon) :) Thanks in advance!

Physics -URGENT-
A 2 kg mass accelerates at 5.7 m/s 2 in a direction 19◦ north of east. One of the two forces acting on the mass has a magnitude of 17.1 N and is directed north. Determine the magnitude of the second force. Answer in units of N

To ms sue

English writing a concluding paragraph
I have to write from specific to general in my concluding paragraph and can't have any contractions, no 1st person or second person , no rhetorical questions , no in conclusion, in summary, etc

English writing a concluding paragraph
My essay is about conformity and rebellion. I need a really good conclusion. My intro is this: In life there will be certain situations in which we will have to stay in order or choose to make our decisions ourselves. For example there will be times when conformity will strike...

Well we learn about the Earth and DNA and plants and all of the components of a plant we also learn about Animals.

Sciences
Helium has an atomic number of two.what can be inferred about helium from this fact?

Math
how do you write radicals as powers? please help me with the following question, I know the answer but I don't know HOW to get it. I must learn this so please help me. y5/3 is under the square root sign sorry I retyped this, but I made a mistake typing it before

Math
No wait let me re type the question: y5/3 is under the square root sign

Math
the ay was supposed to be a square root sign..

Math

Oh thank you:)

please check if I have put the apostrophes in the right places or if I have forgot to put them in certain places in these sentences: 1. My dog's been so sick lately. 2. We've been having lots of fun in science classes. 3. Why's the dog eating from the cats' ...

Chemisry
6M HCl + 1M NaOH => NaCl + H2O If I'm understanding this correctly, all of the NaOH is used up because the molarity is 1 where the HCl's is 6 this leaves excess HCl correct?

Algebra
The deck around a swimming pool has the same width all the way around. The perimeter of the pool is 50m. The outside perimeter of the deck is 74m. What is the width of the deck

Math
if 3/5 of the class are boys and there are 12 more boys than girls. How many girls are there in the class?

Physics
An arrow is fired horizontally from the top of a 40.0-m vertical cliff and lands 125 m away. Therefore the arrow was fired at _____ m/s.

Physics
I don't understand.. could you give a better answer?

Physics
A car that was initially at rest reaches a final speed of +50.0 m/s over a displacement of +55.0 m. What is the magnitude of the acceleration? Find the time it took to travel the first 55 m.

environment
United Nations Environment Program Greenpeace

World Geography
jack. is correct 100%

chemistry
enzymes convert glucose M=180.2 to ethanol M=46.1 according to the equation C6H12O6=2C2H5OH + 2CO2 what is the maximum mass of ethanol that can be made from 15.5 kg of glucose?

Adding fractions is simple I will have this as a blog

math
a company employs 12 gardeners at \$26 per day , and 8 clerks at \$17 per day. What is the mean daily wage,in dollars,of the 20 employees?

math
a man pays 60 cents for every 200m3 of gas used,plus a fixed charge of \$13.75. How much does he pay when he uses 55 000m3 of gas?

math

chemistry FP depression
if I had to choose a solvent for a freezing point depression lab...would I choose Chloroform or Benzophenone? and why?

chemistry
if calculating molecular weight of unknown by freezing point depression...All of the unknowns in the activity were nonpolar organic molecules with molecular weight= 100-250 g/mol and using around 1g of the unknown. Provide an example of a solvent that could possibly be used ...

chemistry HELP
if calculating molecular weight of unknown by freezing point depression...All of the unknowns in the activity were nonpolar organic molecules with molecular weight= 100-250 g/mol and using around 1g of the unknown. Provide an example of a solvent that could possibly be used ...

physics
Thunderstorms can have an electric ﬁeld of up to 341 × 10 ^5 N/C. What is the magnitude of the electric force on an electron in such a ﬁeld? The fundamental charge is 1.6002 × 10^−19 C .

Physics
A coil with 347 turns of wire, a total resistance of 49 Ω, and a cross-sectional area of 0.28 m2 is positioned with its plane perpendicular to the ﬁeld of a powerful electromagnet. What average current is induced in the coil during the 0.31 s that the magnetic &#...

physics
A ﬂat coil of wire consisting of 56 turns, each with an area of 39 cm^2, is positioned perpendicularly to a uniform magnetic ﬁeld that increases its magnitude at a constant rate from 3.1 T to 10 T in 5.7 s. If the coil has a total resistance of 0.56 Ω, what ...

Chemistry
You're incorrect.

Math
Is the equation sinx + cosx = 1 an identity? Why?

Physics
A series of pulses, each of amplitude 0.190 m, are sent down a string that is attached to a post at one end. The pulses are reflected at the post and travel back along the string without loss of amplitude. (a) What is the displacement at a point on the string where two pulses ...

psychology
The first year after the speed limit was reduced to 55 mph was the first year since there was a federal speed limit that no one in the United States who was observing the speed limit died in an auto accident. What does this prove?

Psychology
I know a man who read to his 5 children every night before they went to bed, and they all could read before entering preschool. Suppose that this were true of all children we could find who were read to every night before going to bed but true of only a few of those who were ...

psychology
For question #1, can you say that the two variables are positively correlated however, it doesn't mean that running regularly can cause one to lives longer. For question #2, are you saying that there are other variables that need to be considered?

psychology
1. A recent study confirms that people who run regularly, live longer. How can one explain that? 2. More retired people die each year than those who have not retired. Does this mean that delaying retirement will increase one's life expectancy? Explain.

Psychology
How could my wife and I find out whether the South Beach Diet works for us? Write the methods section for an experiment.

psychology
Here is what i come up with. will you see if it make sense? Recruit few random women from her age group. Randomly divided them into 2 groups Assign each group one of the bicycle. Let the two groups compete and see which group perform better.

psychology
A friend of mine finished fourth in her age group in the world duathlon (run, ride, run). She has two bicycles that differ along several variables, but she isn’t sure which one will be best for the next season. How could she find out? Write the methods section for an ...

psychology
Suppose that you have developed three new kinds of hair shampoo, and you want to know how people's preference depends on their age. Design an experiment to find out.

psychology
What implications do the results of an experiment have for subjects that were not observed in the experiment?

Math
Use the discriminate to determine the number of real solutions of the equations. 7^2-2x+1

Probability/Decision Analysis
A manufacturer is trying to decide whether to build Building A or Building B. The profit per unit is \$5. Building A gets an annual cost of \$100,000 with a production capacity of 25,000 units each year. Building B gets an annual cost of \$200,000 with a production capacity of 50...

Statistics
A brewery's filling machine is adjusted to fill bottles with a mean of 32.6 oz. of ale and a variance of 0.004. Periodically, a bottle is checked and the amount of ale noted. (a) Assuming the amount of fill is normally distributed, what is the probability that the next ...

Physics

H. CHemistry
if the atmosphere can support a column of mercury 760 mm high at sea level, what height of a hypothetical liquid whose density is 1.40 times the density of mercury could supported?

geometry
a ladder is placed next to a building to get to the top. the bottom of the ladder is placed 7 feet away from the building at an angle of 56 degrees.how tall is the building?

english
What is the simple subject and simple predicate in sentence: The smell of cooking is delicious to the hungry campers.

english
What is the simple subject and simple predicate in the sentence: A good fire is difficult to build.

math urgent
i think it b c a

Algebra 2
Subract. Put the answer in the simplest form 9/x-4 - 5/x+4

Math
1. The total of 36, 78, 198, 475, and 620 is A. 2,109. B. 1,731. C. 1,187. D. 1,407. I say it's D 1407

Math for Steve or someone good at math
I'm taking the quick check right now, so I need the right answer to #5 asap! Thanks!

Math for Steve or someone good at math
Sorry I forgot to list the choices. Here are the choices down below: A. They both had the same percentage. B. Max's percent increase was about 1.1% more than Sara's. C. Sara's percent increase was about 10% more than Max's. D. Max's percent increase was ...

Math for Steve or someone good at math
Sara raised her score on a math test from 86 to 94. Max changed his score on the test from 77 to 85. Who had the greater percent change.

Math
what is 5.8, 5.29,5.2942,5.029 from least to greatest

ok
ok any body else thatcould anser this cuz i don't want to do my homework

Math Help!
is 10 000 more than 881 462 is 1000 000 less than 2 183 486 is 1 000 000 more than 746 000 is 1 000 000 less than 624 327 207

governement
citizens of a place?

government
set of land boundaries of a state?

Algebra
What is the rule in equation form of an input/output table if the inputs are 2 10 and 6 and the outputs are 2 6 and 4 ?

physics
a car traveling at 7 m/s accelerates to a velocity of 12.0 m/s in 2.0s. what is the acceleartion of the car?

The anser is 7,555,131 its sooo easy

math
What is the value of the 3 in .ooo3?

Math (cummulative review)
Factor the given polynomial: 3y2+5y-8 the 2 is an exponent...

English
'How about painting the wall a new color?' is addressing one person asking a question to a separate individual. 'How about we paint the wall a new color? is referring to the person asking the question who would like to help the individual with the painting.

Health
All of your points sound really good so far. I have another factor that you could add. E. Most likely to develop diabetes due to the result of not eating healthy

Health
'C' is the best answer out of all of them. I'd make 'B' a correct answer as well. Both of the liquids are healthy to drink.

Fitness And Nutrition
Well, let's go over it. 'A' is the plan that can be followed and used for a long period of time. 'B' is the plan that you have to go to a lot of stores to find one item. It would be tiring after a while. 'C' is the plan that in 1 week you lose, let...

chemistry
How Many H bonds in Oblate Polyhedra?

trigonometry
write 2=5cis 11pie/6 in standard form.

trigonometry
find the dot product of u=2i-7j and v=i+8j

trigonometry
given v=5i+3j and w=-4i+8j, find projwv

trig
find the single term of cos^2 4theta - sin^2 4theta

trig
find the period of f(x)=-2cot x/5

Chem
Okay I got the second pH w/HCl and it is 2.23. but still can't find the pH of both of the ones w/HC2H3O2. Please help?

Chem
Complete the table below: Note: Make simplifying assumptions, do not use the quadratic formula. What is the pH of the solution created by combining 1.90 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq)? with 8.00 mL of the 0.10 M HC2H3O2(aq)? mL NaOH: 1.90 pH w/HCl...

algebra
(6x-2y)/(x^2+xy-2y^2)-(3x+2y)/(x^2+3xy-4y^2)

Basic Dressmaking Processes
A Correct 2. D Correct 3. B Correct 4. A C PAGE 6 5. A Correct 6. D Correct 7. C Correct 8. B Correct 9. C Correct 10. D Correct 11. C Correct 12. C Correct 13. A Correct 14. B Correct 15. D Correct 16. C Correct 17. A Correct 18. A Correct 19. B Correct 20. B Correct

Math
If you're rolling two dice, what is the probability that the sum of two dice is a 7?

math
i try and try to practice for my checkpoints but i keep on failing in them!!!!!!!!!!! what can i do to improve in maths,science and english. please help me practice. I was hoping you could give me the real checkpoint papers for all subjects!! thatcwould be amazing then i'...

english
I'm writing a english paper about A Tale of Two Cities to show why/how the topic of law/corruption/power matters from the way Dickens uses it in the text. I am trying to write my intro, but I am having trouble. All I have so far is an attention-getter, a quote. Here is the...

Chemistry
Thank you so much! Not I don't think I will fail my test tomorrow!

Science
you are to make a buffer of pH = 4.33 using HNO2 and NaNO2 what ratio of NO2- to HNO2 is required?

math
The diameter of each tire on Niki's bike is 66 centimeters (cm). It takes her 16 minutes to ride 10 kilometers (km). How fast did Niki ride, in kilometers per hour?

A farmer wants to fence in 60 000m^2 of land in a rectangular field along a straight road. The fencing that he plans to use along the road is \$10 per meter and the fencing that he plans to use for the other three sides costs \$5 per meter. a) How much of each type of fence ...

Acoustic and Auditory Physics
Yeah, I am having trouble interpreting it. I think The first resonant frequency fits well within a frequency range where the ear is maximally sensitive makes the most sense

Acoustic and Auditory Physics
A resonant frequency is a frequency that resonates within a tube of some length. The first resonant frequency of the average ear canal is around 3,000 Hz. Look at the Fletcher-Munson diagram. Which of the following statements is correct? The intensity level of the first ...

geometry
A triangle is inscribed in a circle. One side of the triagle has lenghth 12 cm, and the angle opposite that side measures 30 degrees. What is the diameter of the circle?

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