Friday

July 25, 2014

July 25, 2014

Total # Posts: 965

**Statistics **

A research worker wishes to estimate the mean of a population by using sufficiently large sample. At the confidence level of 99%,the sample mean will be within 35% of the standard deviation. How large a sample should be taken?

**Chemistry**

Calculate [H3O+] in the following aqueous solution at 25 ∘C: [OH−]= 1.9×10−9M Calculate [H3O+] in the following aqueous solution at 25 ∘C: [OH−]= 2.1×10−2M Calculate [H3O+] in the following aqueous solution at 25 ∘C: [OH...

**math**

2(2+0.5+0.75)= 2 (2.5+ 0.75)= 2 ( 3.25 ) 6.5

**math**

Allison needs 2 yards of blue ribbon, 1/2 yard of yards of yellow ribbon and 3/4 yards of green ribbon at $ 2.00 a yard. How much money do she need for the ribbon.

**Math**

Pay can buy a package of 20 balloons for $6 or a package of 50 for $9. How much cheaper is each balloon in the package of 50 balloons?

**Math**

What is the number of tens for 599

**Math: Thinking Mathematically**

A flagpole has the height of 16 yards It will be supported by three cables, each of which is attached to the flagpole at a point 4 yards below the top of the pole and attached to the ground at point that is 9 yards from the base of the pole, Find the total number of feet of ca...

**physics**

A 2.284 km car is moving down a road with a slope of 13% at a constant speed of 11 m/s. What is the direction and magnitude of the frictional force?

**Calculus**

The half-life of radioactive strontium-90 is approximately 31 years. In 1960, radioactive strontium-90 was released into the atmosphere during testing of nuclear weapons, and was absorbed into people's bones. How many years does it take until only 11 percent of the origina...

**fractions**

Gisela finished washing 3/4 of her laundry. She washed 1/3 of this laundry today. Use a rectangle to draw a model to match your expression. What fraction of her laundry did she wash today?

**fractions**

A box with 2/3 cup of cornmeal was used to make pizza. Shelly used 1/4 of the box of cornmeal. Use a rectangle to draw a model to match your expression. What fraction of a cup of cornmeal did she use for the pizza?

**math**

A box with 2/3 cup of cornmeal was used to make pizza. Shelly used 1/4 of the box of cornmeal. Use a rectangle to draw a model to match your expression. What fraction of a cup of cornmeal did she use for the pizza?

**math**

Gisela finished washing 3/4 of her laundry. She washed 1/3 of this laundry today. Use a rectangle to draw a model to match your expression. What fraction of her laundry did she wash today?

**Physics**

Problem 1 (80 points) Consider a spring of equilibrium length L, lying horizontally in a frictionless trough. The spring has cross sectional area S perpendicular to its length. The trough constrains the motion of the spring so that any wave propagating along the spring is a lo...

**math**

jake and jeremy both join a book club. jake pays $6 per book plus a $12 joining fee while jeremy pays a $17 joining fee and $5 per book. How many books will they have to buy before they are paying the same amount?

**Math**

Eli can’t see why a size transformation preserves orientation, but a similitude does not. How could you help him understand this concept?

**Physics**

Sitting besides a friend on a park bench, you grab her hat and start running in a straight line away from her. Over the first 15.0, you accelerate at 1 m/s^2 up to your maximum running speed. You then continue at your maximum running speed for 15 s more before your friend catc...

**Phyics**

Sitting besides a friend on a park bench, you grab her hat and start running in a straight line away from her. Over the first 15.0, you accelerate at 1 m/s^2 up to your maximum running speed. You then continue at your maximum running speed for 15 s more before your friend catc...

**Math**

An irrigation pump can pump 250 liters of water per minute. How many hours should the system work to water a rectangular ﬁeld 75 m by 135 m to a depth of 3 cm?

**Math**

There are about 7 billion people on Earth. Suppose that they all lined up and held hands, each person taking about 2 yards of space. a. How long a line would the people form? b. The circumference of the Earth is about 25,000 miles at the equator. How many times would the line ...

**Math**

The horsepower is a nonmetric unit of power used in mechanics. It is equal to 746 watts. How many watts of power does a 350-horsepower engine generate?

**physical/earth science**

what important nonmetal is in brilliant yellow acrylic paint that contains titanium dioxide

**Spanish**

Tengo sed. ¿_____ un vaso de agua, por favor? A. Me trae B. Le traigo C. Me falta D. Quisiera I think it's A?

**Physics**

A boy sledding down a hill accelerates at 1.24 m/s2 . If he started from rest, in what distance would he reach a speed of 8.88 m/s? Answer in units of m

**current events**

I am turning twenty-six on Tuesday October Eighth. I have a grace period from the insurance company that I can stay on for a while after my birthday. When should I start signing up for this brand-new health care program? Even after you apply, is there a long processing wait ti...

**English 10 Honors**

I need help figuring out what the theme of the poem Family "Heirlooms" by James Tate

**Chemistry**

It only says "K" , there is nothing about a Kc or Kp

**Chemistry**

Help please, What is the minimum mass of NH4HS that must be added to the 5.00-L flask when charged with the 0.350g of pure H2s(g), at 25 ∘C to achieve equilibrium? Ammonium bisulfide, NH4HS, forms ammonia, NH3, and hydrogen sulfide, H2S, through the reaction NH4HS(s)V...

**math**

Working on patterns. There is a diagram. Its a rectangle with the numbers 10, 16, 23 in each corner. Inside the rectangle is a circle and inside the circle are the numbers 9, 12, 24. The directions say to place the numbers 8 to 26 either inside or outside the circle according ...

**MATH**

Working on patterns. There is a diagram. Its a rectangle with the numbers 10, 16, 23 in each corner. Inside the rectangle is a circle and inside the circle are the numbers 9, 12, 24. The directions say to place the numbers 8 to 26 either inside or outside the circle according ...

**Math**

Working on patterns. There is a diagram. Its a rectangle with the numbers 10, 16, 23 in each corner. Inside the rectangle is a circle and inside the circle are the numbers 9, 12, 24. The directions say to place the numbers 8 to 26 either inside or outside the circle according ...

**math**

Working on patterns. There is a diagram. Its a rectangle with the numbers 10, 16, 23 in each corner. Inside the rectangle is a circle and inside the circle are the numbers 9, 12, 24. The directions say to place the numbers 8 to 26 either inside or outside the circle according ...

**physics**

Henrietta is going off to her physics class, jogging down the sidewalk at a speed of 2.65m/s . Her husband Bruce suddenly realizes that she left in such a hurry that she forgot her lunch of bagels, so he runs to the window of their apartment, which is a height 54.8m above the ...

**current events health care reform**

Soon enough, I will be too old to remain covered under my parents' medical insurance. So, what happens next? For example, do I have to supply proof to some government agency that I have benefits when I do acquire them? Attaining gainful employment with a full package would...

**current events health care reform**

Thank you for that. That is going in the correct direction. Is there some mechanical process that I have to follow beyond that? Are there deadlines by which these procedures have to be followed? Hypothetically, how does the Obama administration expect people living below pover...

**current events health care reform**

Thank you for that. That is going in the correct direction. Is there some mechanical process that I have to follow beyond that? Are there deadlines by which these procedures have to be followed? Hypothetically, how does the Obama administration expect people living below pover...

**current events health care reform**

Soon enough, I will be too old to remain covered under my parents' medical insurance. So, what happens next? For example, do I have to supply proof to some government agency that I have benefits when I do acquire them? Attaining gainful employment with a full package would...

**physical science**

density equals mass divided by volume 39.5 grams divided by 5.0 cubic centimeters 7.9 grams per cubic centimeter

**college physics**

9.0 meters per second squared (9.0 meters per second every second).

**Math**

The mode refers to the most frequently repeated number. If there is only one number that appears more often than others, then that is uni-modal. If there are two popular numbers that occur an equal number of times, then that would be bi-modal. If neither case applies, then tha...

**Physical Science **

which waves have wavelengths longer than those of visible light? Give an example of how each kind of wave is used.

**Physical Science **

Which of the following does NOT show the law of conservation of mass? A. 24 g of Mg burn in 32 g O2 to produce 56 g of MgO. B. 24 mL of Mg burn in 32 mL O2 to produce 56 mL of MgO. C. 2 atoms of Mg react with 1 molecule of O2 to produce 2 units of MgO. D. 1 atom of Mg reacts w...

**Physical Science**

Which of the following statements about ice melting is true? A. Energy flows from the ice to its surroundings. B. Water molecules move from their fixed position. C. Water molecules lose energy. D. The temperature of the ice increases as it melts. I think it's C.

**Pyhsical Science**

Which of the following statements is true about scientific theories? A. Scientific theories become scientific laws. B. Scientific theories are never proven. C. Scientific theories become hypotheses. D. Scientific theories summarize patterns found in nature. I think it's B.

**Pyhsical Science**

What is a system of knowledge and the methods used to find that knowledge? A. science B. technology C. measurement D. curiosity I think it's D.

**Health**

What is an example of impulsive and often dangerous behaviors that people with borderline personality disorder have a tendency to display? A. Driving recklessly B. Binge eating C. Engaging in unsafe sex D. All of the above I think it's D.

**Health**

The difference between dysthymic disorder and major depressive disorder is that ________. A. Symptoms of dysthymic disorder are usually less severe than those of major depression B. Symptoms of dysthymic disorder are usually shorter than those of major depression C. Symptoms o...

**Health**

What is stress management? A. Controlling and reducing the tension that occurs in stressful situations B. Controlling and reducing the tension that occurs in peaceful situations C. Controlling and reducing the happiness that occurs in peaceful situations D. Controlling and red...

**Health**

What is an example of having a poor diet? A. Making unhealthy food choices B. Not eating enough C. Not eating on a normal schedule D. All of the above I think it's D.

**Health**

Imagining potential negative big events is one way that a person can manage his or her stress. To help with this, one should ________. A. Be confident B. Relax with deep breathing C. Think positively D. Have a back-up plan I think it's B.

**Health**

What can long-term stress cause? A. Abnormal heart beats B. Acne C. Obesity D. All of the above I think it's D.

**Health**

It's B.

**Health**

Physical signs of stress typically include ________. A. Stomach growling B. Tense muscles C. Tickling sensation D. All of the above I think it's D.

**Statistics**

A simple random sample of cars in a city was categorized according to fuel type and place of manufacture. domestic foreign gasoline 146 191 diesel 18 26 gasoline/ 51 79 electricity hybrid 1. If the two variables were independent, the expected number of foreign gas/electric hyb...

**Statistics**

According to a genetics model, plants of a particular species occur in the categories A, B, C, and D, in the ratio 9:3:3:1. The categories of different plants are mutually independent. At a lab that grows these plants, 218 are in Category A, 69 in Category B, 84 in Category C,...

**Health**

For adults, which ranges below reflect an accurate BMI category? A. If your BMI is less than 18.5, it falls within the obese category B. If your BMI is 25-29.9, it falls within the underweight category C. If your BMI is 30 or higher, it falls within the overweight category D. ...

**Health**

Thank you.

**Health**

How do you lose weight? A. By using up less calories than you take in B. By using up more money on diet programs and pills C. By using up less energy than you take in D. By using up more calories than you take in I think it's D.

**Health**

Thank you.

**Health**

Why are many fad diets considered unhealthy? A. Because they may not provide all of the nutrients your body needs B. Because they often promise quick weight loss C. Because people typically find it difficult to keep lost weight off D. All of the above D?

**Science**

A train starts from rest and accelerates uniformly, until it has traveled 3000 m and acquired a velocity of 24 m/s. The train then moves a constant velocity of 24 m/s for 430 s. The train then decelerates uniformly at 0.065 m/s², until it is brought to a halt. 1. In Situa...

**teasley middle school**

Equations

**teasley middle school**

Equations

**teasley middle school**

Equations

**math**

Solve the equations .Then answer the riddle.

**math**

Solve the equations .Then answer the riddle.

**math**

a bicycle wheel has a radius of 3 feet. what is the closest estimate of the distance of 4 full rotations of the wheel

**MATH HELP**

Suppose two sets of data, A and B, have the same MIN and MAX values, but that the IQR for A is larger than the IQR for B. What can you CORRECTLY conclude about the two sets?

**math**

help! 2005 2006 2007 2008 Plant 1 20 4 25 10 Plant 2 25 5 5 48 Plant 3 20 8 20 32 Plant 4 43 10 10 47 Plant 5 40 11 15 48 A gardener recorded how many tomatoes 5 plants produced each year. Which year had the LARGEST interquartile range of tomatoes produced?

**math**

Mark flips a coin twice. How many outcomes are in the sample space

**math**

There are 4 different colored candies in a bag. So, one should have a 25% chance of picking a particular color out of the bag. After pulling out 20 candies, Sally got 8 purples, which is 40%. Predict what will happen as Sally pulls out more candies.

**math **

robin tosses two number cubes 100 times and get a pair of threes 18 times. what is the experimental probability that she will roll a pair of threes on her next toss?

**math**

Mrs little create a box plot for the test scores on her latest math test. she finds that the interquartile range is 20 points. what is the Mean?

**math**

if you have a bag of chocolate candy, ten are red, 7 are brown, 12 are green, and 9 are blue, what is the probability of you picking a red candy given that you already picked a blue candy and have not replaced it?

**math**

2 dices are rolled. which outcome has the lowest probability of occurring?

**Math**

Mr miller teaches a class with 15 boys and 5 girls. if he randomly chooses a student from the class, what is the probability that the chosen student is not a boy?

**Life orientation**

Ways in which smoking impacts on your community

**math**

I tried this problem and got approximately 35.8 mph and 12.9 degrees south of west. I hope this is right.

**Physics**

A light ray traveling through air strikes a smooth, flat slab of crown glass at an angle of 30 degrees to normal. Index of refraction for crown glass is 1.66. What is the angle of refraction?

**Calculus**

An animal population is increasing at a rate of 150+20t animals per year. By how much does the animal population increase between year 5 and year 8?

**math**

The answer is 20 because one equals 10 and since there are two multiply 10*2 which will equal 20 or just add 10+10 which equals 20.

**Physics 1**

A mass m1 = 4.9 kg rests on a frictionless table and connected by a massless string over a massless pulley to another mass m2 = 4.7 kg which hangs freely from the string. When released, the hanging mass falls a distance d = 0.8 m.

**science**

if aluminum has the density of 2.7g what would the mass be?

**Physics**

At the train station, you notice a large horizontal spring at the end of the track where the train comes in. This is a safety device to stop the train so that it will not plow through the station if the engineer misjudges the stopping distance. While waiting, you wonder what w...

**Physics**

At the State Fair you see people trying to win a prize at a game booth. They are sliding a metal disk shaped like a puck up a wooden ramp so that it stops in a marked zone near the top of the ramp before sliding back down. You estimate that you can slide the 'puck' at ...

**Physics**

The Navy wants a new airplane launcher for their aircraft carriers that is basically a large spring and your job is to determine the necessary spring constant. The launcher pushes the plane for a short distance along a much longer runway. During that same time, the plane's...

**Physics**

Your artist friend's new work is a simple, high-impact kinetic sculpture called 'Destruction.' A 200-kg steel block is hung from the ceiling by an 8-foot-long rope. A second rope is attached to the side of the block. The other end of this second rope is attached to...

**physics**

As part of a fundraiser, you want the new dean to bungee jump from a crane. The jump will be made from 44 m above a 2.5 m deep pool of Jello. A 30 m long bungee cord would be attached to the dean's ankle. You must convince the dean that your plan is safe for a person of hi...

**physics**

A 2.6-kg particle moving along the x axis has a velocity of +1.7 m/s as it passes through the origin. It is subjected to a single force, Fx, that varies with position, as shown below.

**PHYSICS**

Efinal= 1/2mvi^2+fd

**Dynamics**

The 10 kg block shown is released from rest on the horizontal surface at point B, where the spring has been stretched a distance of 0.5 m from its neutral position A. The coefficient of kinetic friction between the block and the plane is 0.30. Calculate (a) the velocity v of t...

**writing**

NEED HELP WITH ANALOGIES PLEASEEEEEE DESCENDANT:ANCESTORS

**science**

How do organs relate to cells and tissues?

**Math**

The median score on attest is 90. Is it possible to add two or more scores to the data and still have a median score of 90? Explain

**physics**

A concave shaving mirror has a radius of curvature of 28.0 cm. For each of the following cases, find the magnification and determine whether the image formed is real or virtual and upright or inverted. (a) an upright pencil placed 41.6 cm from the mirror. (b) an upright pencil...

**physics**

A convex mirror with a radius of curvature of 34.0 cm forms a 0.95 cm tall image of a pencil at a distance of 12.5 cm behind the mirror. Calculate the object distance for the pencil and its height. Is the image real or virtual? What is the magnification?

**Math**

A plane flys 425 miles with the wind and 350 miles against the wind in the same length of time if the speed of the wind is 15 mph what is the speed of the plane

**combustion**

A glass melting furnace is burning ethene in pure oxygen (not air). The furnace operates at an equivalence ratio of 0.9 and consumes 30 kmol/hr of ethene. Determine the energy input rate based on the LHV of the fuel in terms of kW. •Determine O2 consumption rate in kmol/hr.

**Math**

2- digit number. There are nine tens. The sum of its digits is 12. What is the number?

**Science**

Compare how much kinetic energy and potential energy the ball has at each point and describe why the ball has that energy

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