Thursday

December 8, 2016
Total # Posts: 1,028

**Introduction to statistics**

A researcher would like to estimate the population proportion of adults living in a certain town who have at least a high school education. No information is available about its value. How large a sample size is needed to estimate it to within 0.19 with 99% confidence? n= (...

*July 17, 2014*

**math**

If I lend somebody one hundred thousand dollar and they have to pay me back in five years, with 4% interest...how much will I get monthly ? ( I am NOT a student...however I am thinking of lending my community this amount of money. Can't find any site that can help me. ) ...

*July 1, 2014*

**Chemistry**

-2302.8

*June 29, 2014*

**math**

it is required to find a rational number which is equal to the recurring decimal number 0.327327327...,(a)find the value of 1000x-x (b)hence, express 0.327327327... in the form a/b, where a and b are integers.

*June 27, 2014*

**Math**

1/20*80,000,000=4,000,000

*June 25, 2014*

**com 200**

Kyle has struggled to feel comfortable in science classes with labs since his junior year of high school, when a solution he was working with ignited. He was always cautious with chemicals but his lab partner that year enjoyed seeing what would happen when he mixed random ...

*June 15, 2014*

**maths**

how many jelly beans in a jar more than thirty less than sixty

*June 10, 2014*

**physics**

Force of friction decreases The minimum angle at which the block will slide decreases

*June 8, 2014*

**Economics**

Define welfare payments or consumer subsidies

*June 4, 2014*

**L.o**

Four factor that could threaten

*May 26, 2014*

**Science**

Oh wow, Sorry Ms. Sue! I honestly couldn't find it, so that's why I reported. Thanks for the help!

*May 18, 2014*

**Science **

Please help! Many people who care about conserving natural resources would choose to use wind energy to power their homes. However, wind power is not an option for people in many parts of the country. Explain what the benefits of wind power are and why it is not available to ...

*May 18, 2014*

**Science : Please Help!**

Many people who care about conserving natural resources would choose to use wind energy to power their homes. However, wind power is not an option for people in many parts of the coutnry. Explain what the benefits of wind power are and why it is not available to everyone in ...

*May 18, 2014*

**math**

What is the mean of the following set? 134, 298, 328, 95, 119

*April 21, 2014*

**5th grade math **

Estimate the quotient. 3,594/68 My answer is 3,500/70=50 Is my answer correct?

*April 9, 2014*

**5th grade math**

I should have said 240/80=3 because 400 is not close to 255.

*April 9, 2014*

**5th grade math**

Thanks. For 255/81, my answer is 400/80=5. Do I have correct answer?

*April 9, 2014*

**5th grade math **

Estimate the quotient. 1.175/18 2. 231/37 My answer is 1. 200/20=10 2. 200/40=5 Did I find the correct estimates for these problems?

*April 9, 2014*

**5th grade math**

Thank you!

*April 9, 2014*

**5th grade math **

Name the compatible numbers used to find the estimate. 1. 725/19 estimate:35 2. 3,641/34 estimate:120 Please show me how to work out these problems.

*April 9, 2014*

**physics**

At an angle of 42 degrees to the left of the normal. Because the law of reflection states that the angle of incidence is equal to the angle of reflection

*April 9, 2014*

**math**

Name the position of the first digit of the quotient. 1. 832/4 2. 217/7 I don't understand. Someone please explain to me.

*April 8, 2014*

**math **

suppose a normal distrubtion has a mean of 25 and a standard deviation of 2. what is the area under the curve between 23 and 27

*April 2, 2014*

**math **

Rewrite the following equation in the center-radius form of the equation of a circle. x2 - 2x + y2 + 2y - 2 = 0

*March 21, 2014*

**Science**

Which of the following is a mechanism used by humans to defend against any disease-causing organism 1)the creation of antibodies 2)the injection of vaccines 3)the production of mucus membranes 4)the use of antibiotics

*March 18, 2014*

**American History **

Which organization specifically promoted support for the war among the American people? A. the Committee on Public Information B. the Red Cross C. the Council of National Defense D. the War Industries Board

*March 17, 2014*

**Math**

Mrs. Marcincavage allowed each student in her math class to drop the lowest of their five test scores. When Matthew dropped the lowest of his test scores, a 60, his test average increased by 5 points. What is Matthew’s new test average?

*March 3, 2014*

**Chemistry**

One day at the fertilizer factory, your boss Mr. Haber comes to you with a problem. The process used by the factory to produce ammonia,the raw material for your fertilizer, is just not optimized. He would like to modify the conditions to achieve a better yield of ammonia in ...

*February 25, 2014*

**Chem- Bronsted bases**

Which of the following substances can act as a Bronsted base in aqueous solution? (Select all that apply.) H2O NH3 H2 CH3NH2 O2 PH41+ CO32-

*February 23, 2014*

**chemistry**

If 16.0 mL of 8.5 ✕ 10-2 M HClO4 is added to 22.0 mL of 7.6 ✕ 10-4 M KOH, what is the pH of the solution?

*February 23, 2014*

**AP Chem**

How would you find a formula for a salt that contains NH4+ and is basic? I understand how to determine if a salt is acidic or basic but i don't know how you would go in reverse.

*February 18, 2014*

**chemistry **

What is the molarity of a solution with a volume of 974 mL containing 17 g of CuSO4?

*February 18, 2014*

**Chemisty**

A 25-mL sample of 0.160M solution of NaOH is titrated with 17 mL of an unknown solution of H2SO4. What is the molarity of the sulfuric acid solution? A. 0.004M H2SO4 B. 0.235M H2SO4 C. 0.117M H2SO4 D. 0.002M H2SO4

*February 18, 2014*

**Chemistry**

I need to make a calorimeter for my high school chemistry class. Any suggestions? I have a few ideas but I can't figure out how I would light the food on fire from inside the container. I have to burn the food and measure the heat through water. thank you!!!!!

*February 11, 2014*

**keiser university**

Healthcare Finance Questions 1. Community Hospital has annual net patient revenues of $150 million. At the present time, payments received by the hospital are not deposited for six days on average. The hospital is exploring a lockbox arrangement that promises to cut the six ...

*February 2, 2014*

**Physics**

How do I put pictures

*January 28, 2014*

**Physics**

Spring on Incline The block in the figure is initially at rest on an inclined plane at the equilibrium position that it would have if there were no friction between the block and the plane. How much work is required to move the block 25 cm down the plane if the frictional ...

*January 28, 2014*

**Math**

Department store A charges 9.75% tax; department store B charges 7.25% tax. if a shopper's pre-tax receipt is between $11.57 and $81.43, write and graph a compound inequality that describes the difference in taxes paid for the two locations (to the nearest cent.) I wrote: ...

*January 23, 2014*

**Math**

Cody wants to go on his senior class trip. He finds a job that pays $7 per hour and he also mows lawns for $9 an hour. He needs to earn $693 to pay for the trip, excluding spending money. 1. Write an inequality describing Cody's goal in terms of hours at his job, x, and ...

*January 23, 2014*

**Math**

True or False: 1. if [w-7]<-3, then w-7>3 (NOTE: In this case "[ ]" indicate absolute value.) I did: 3+7<w-7<-3+7 10<w<4 So, I think it's False 2. If -4 < -2t + 6 < 10, then 2>t+6>-5 I worked the equation and got: 5>t>-2 So, I ...

*January 23, 2014*

**Math**

How would you graph an equation like x+y=4 or y-1=-1x-2? I know you have to change the form, i just don't remember how to do it.

*January 23, 2014*

**Math**

They may mean perpendicular to the previous question: y=3x+6

*January 23, 2014*

**Math**

1. What is the equation in standard form of a perpendicular line that passes through (5,1)? 2. What is the x-intercept of the perpendicular line? 3. What is the equation in standard form of a parallel line that passes through (0,-2)? 4. On the parallel line, find the ordered ...

*January 23, 2014*

**Math**

Use the point-slope form linear equation given to complete the following problems. y-3=3(x+1) 1. What is the slope of the given line? Here's what I did: y-3=3(x+1) y-3+3=3x+3 y=3x+6 m=3 Correct so far? 2. What point does this line pass through, which is the basis of this ...

*January 23, 2014*

**please help me!! with this science!!!!!**

Also this is from my quiz so i know all of these are right because it says whether or not i got the question right and what the correct answer is.

*December 11, 2013*

**please help me!! with this science!!!!!**

Question 1: Second-level consumer Question 2: High average air temperatures are critical to the lizard's survival. Question 3: Deciduous forest- moderate temperatures and rainfall. Question 4: Salt level Question 5: Increased drought cutting off water flow in streams ...

*December 11, 2013*

**earth**

3. What can scientists learn from the rate at which radioactive elements decay?

*December 10, 2013*

**IPC**

the highest pressure ever produced in a laboratory setting was about 2000000 atm. if we have a .000010 liter sample of a gas at that pressure until it is equal to 0.275 atm, what would the new volume of that gas be?

*December 3, 2013*

**IPC**

synthetic diamonds can be manufactured at pressures of 60000 atm. if we took 2.00 liters of gas at 1.00 atm and compressed it to a pressure of 60000 atm, what would the volume of that gas be?

*December 3, 2013*

**IPC**

in a thermonuclear device, the pressure of 0.050 liters of gas within the bomb casing reaches 4000000 atm. when the bomb casing is destroyed by the explosion, the gas is released into the atmosphere where it reaches a pressure of 1.00 atm. what is the volume of the gas after ...

*December 3, 2013*

**Science(IPC)**

1.00 L of a gas at standard temperature and pressure is compressed to 473 ML. what is the new pressure of the gas?

*December 3, 2013*

**geometry**

Deshawn built a model train car. The length of the model train car is 6 in. The scale Deshawn used to build the model train car is 1:36. What is the actual length of the train car in FEET?

*December 2, 2013*

**science**

Does Anyone know the answer?? 1 either B or C

*November 24, 2013*

**Chemistry**

Ca+Cl2->CaCl2

*November 19, 2013*

**Chemistry**

How many moles of CaCl2 are produced when this reaction is started with 4.70 grams of chlorine gas?

*November 19, 2013*

**Chemistry**

Thank you so much!

*November 19, 2013*

**Chemistry**

If 5.0 grams of Zinc were added to 35.0 grams of H2SO4, how many grams of hydrogen gas would be evolved?

*November 19, 2013*

**grammar**

What parts of speech are the words "take possession" is this a verb phrase? Is take a "helping verb" here?

*November 7, 2013*

**AP Chemistry**

At 298K and 1 atm, a 0.5 mol sample of O2 and a seperate 0.75 mol sample of CO2 gas have the same: A. mass B. density C. average molecular speed D. average molecular kinetic energy E. number of atoms Please explain, and thanks for helping!

*November 6, 2013*

**AP Chemistry**

Equal masses of Ne and Ar are placed in a rigid, sealed container. If the total pressure in the container is 1.2 atm, what is the partial pressure of Ar?

*November 6, 2013*

**walden University**

how that would change if the dependent variable was yes/no obesity instead of BMI. What cofounders should be included in this analysis?

*November 5, 2013*

**tsu**

Mortgage lenders base the mortgage interest rate they offer you on your credit rating. This makes it financially critical to maintain a credit score of 700 or higher. How much more interest would you pay on a $195,000 home if you put 20% down and financed the remaining with a ...

*November 5, 2013*

**Finance**

P5. A thirty U.S. Treasury bond has a 4.0 percent interest rate. In contrast, a ten-year Treasury bond has an interest rate of 2.5 percent. A maturity risk premium is estimated to be .2 percentage points for the longer maturity bond. Investors expect inflation to average 1.5 ...

*November 2, 2013*

**Math. Please help**

Emory tosses a nickle four times. The probability that he gets at least as many heads as tails is? Explain

*November 2, 2013*

**Math**

A coin is loaded in such way that a tail is three times as likely to occur as a head. If the coin is flipped twice. Find the probability that two heads occur

*November 2, 2013*

**Math**

Twenty marbles are in a bag. There are 5 green marbles, 9 blue marbles, and the rest are red. Two marbles are drawn at random without placement. Find the probability that neither is blue

*November 2, 2013*

**Math**

A coin is loaded in such way that a tail is three times as likely to occur as a head. If the coin is flipped twice. Find the probability that two heads occur

*November 1, 2013*

**Math**

Twenty marbles are in a bag. There are 5 green marbles, 9 blue marbles, and the rest are red. Two marbles are drawn at random without placement. Find the probability that neither is blue

*November 1, 2013*

**Math**

Assume that 3 dice are thrown simultaneously. What is the probability that exactly one 4 will come up?

*November 1, 2013*

**Math**

" kelly has twelve cards numbered 1 to 12. what is the probability of picking three even-numbered cards consecutively, if the first two cards are not replaced?

*November 1, 2013*

**Math. **

You repeatedly toss a fair coin for 5 times. What is the probability that heads comes up at least 3 times before tails comes up twice?

*November 1, 2013*

**Math**

Emory tosses a nickle four times. The probability that he gets at least as many heads as tails is? Explain

*November 1, 2013*

**Math**

Assume that 3 dice are thrown simultaneously. What is the probability that exactly one 4 will come up?

*November 1, 2013*

**Math**

Twenty marbles are in a bag. There are 5 green marbles, 9 blue marbles, and the rest are red. Two marbles are drawn at random without placement. Find the probability that neither is blue

*November 1, 2013*

** Math**

A coin is loaded in such way that a tail is three times as likely to occur as a head. If the coin is flipped twice. Find the probability that two heads occur

*November 1, 2013*

**grammar / english (10th grade)**

Two sentences: 1) The race among the three relay teams was close; none of the three; however, is giving up hope of winning. 2) The race among the three relay teams was close; however, none of the three is giving up hope of winning. Which is the correct one grammatically? ...

*October 22, 2013*

**physics**

I don't know.

*October 17, 2013*

**Math**

Aaron has two types do iodine in his lab. He has brand 213 iodine, which costs 36 cents per ounce. He also has brand 856 iodine, which costs 1.58$ per ounce. How many ounces of brand 213 should be used if he has 63 ounces of brand 856 and wants to make a mixture that costs ...

*October 10, 2013*

**physics**

Spring on Incline The block in the figure is initially at rest on an inclined plane at the equilibrium position that it would have if there were no friction between the block and the plane. How much work is required to move the block 25 cm down the plane if the frictional ...

*October 9, 2013*

**world history**

the meaning of paleolithic age

*October 6, 2013*

**Science**

Mole and Kelvin

*September 27, 2013*

**Spanish**

Thank you very much!

*September 22, 2013*

**Spanish**

I need to make each statement into a question using the interrogative words. Can someone revise the questions Adónde Cuándo Cuántos De dónde Dónde Por qué Qué Quién ¿ Dónde caminan Paco y Rosa? Paco y Rosa ...

*September 22, 2013*

**math **

We are doing improper fractions and they are talking about the Tee-pee method ,what is it

*September 17, 2013*

**physics lon capa **

A car starts from rest and travels for 4.93 s with a uniform acceleration of +1.53 m/s2. The driver then applies the brakes, causing a uniform acceleration of -1.99 m/s2. If the brakes are applied for 2.83 s, how fast is the car going at the end of the braking period?

*September 14, 2013*

**physics lon capa **

A car starts from rest and travels for 4.93 s with a uniform acceleration of +1.53 m/s2. The driver then applies the brakes, causing a uniform acceleration of -1.99 m/s2. If the brakes are applied for 2.83 s, how fast is the car going at the end of the braking period?

*September 14, 2013*

**physics**

-------------------------------------------------------------------------------- A tennis ball with a speed of 11.4 m/s is thrown perpendicularly at a wall. After striking the wall, the ball rebounds in the opposite direction with a speed of 8.64 m/s. If the ball is in contact...

*September 14, 2013*

**Physics**

At t=0 a particle starts from rest at x=0, y=0 and moves in the xy plane with an acceleration a=(4.0i+3.0j)m/s^2. Determine (a) the x and y components of velocity, (b) the speed of the particle, and (c) the position of the particle, all as a function of time. (d) evaluate all ...

*September 12, 2013*

**chemistry**

A gas has a density of 5.56 g/L. a. What volume in milliliters would 4.17 g of this gas occupy? b. What would be the mass in kilograms of 1 m3 of this gas?

*September 11, 2013*

**chemistry**

A gas has a density of 5.56 g/L. a. What volume in milliliters would 4.17 g of this gas occupy? b. What would be the mass in kilograms of 1 m3 of this gas?

*September 11, 2013*

**chemistry**

A gas has a density of 5.56 g/L. a. What volume in milliliters would 4.17 g of this gas occupy? b. What would be the mass in kilograms of 1 m3 of this gas?

*September 11, 2013*

**Chemistry**

a chemist needs 2.00 grams of a liquid compound witha density of 0.785 g/cm^3 density. what volume of compund is required?

*September 3, 2013*

**Chemistry**

a chemist needs 2.00 grams of a liquid compound witha density of 0.785 g/cm^3 density. what volume of compund is required?

*September 3, 2013*

**Pyhsical Science**

It's actually D.

*August 27, 2013*

**math**

solve for x x-7/6=x+3/7

*August 20, 2013*

**Geometry **

If the distance from the top of a building to the tip of its shadow is 150 feet and the sun makes a 75 degree angle with the wall as shown in the image below, what is the length of the shadow?

*August 8, 2013*

**History**

Passed in 1935, Roosevelt's most significant reform measure was the

*August 4, 2013*

**math**

julia studied math for 3 1/3 hours during the 4 days before her last math test what was the average amount of time she studied each day

*May 14, 2013*

**Math**

The question I put in is all the information that was stated.

*May 4, 2013*

**Math**

A house.

*May 4, 2013*