Tuesday

December 1, 2015
Total # Posts: 313

**Chemistry**

How man kilojoules of energy are needed to vaporize a 28.6g sample of liquid benzene at its normal boiling point of 80C?
*November 12, 2015*

**Biology**

There are at least 4 different ways that humans have genetic variation, a. Using one of these four ideas explain why you do not look like another person in this room. b. To continue further with this thought use another one of the genetic variation ideas and explain why you ...
*October 29, 2015*

**Algebra**

A mother takes 48 minutes to mow the lawn when she works alone using a gas mower. Her daughter takes three times as long using a reel mower. How long would it take them to mow the lawn together?
*October 20, 2015*

**Biology**

a. A human cell is placed in a container of sugar water. Explain what would occur, if the cell membrane is impermeable to sugar. I know that the water in the cell is the high concentration and will go to the sugar water which is the low concentration. b. Another cell is placed...
*October 5, 2015*

**Algebra 2**

Can this expression be factored? 4x^2+9 My homework assignment says to factor completely and this is one of the problems but I don't think this expression can be factored. Am I wrong? If so how do I factor it.
*October 2, 2015*

**f5 math**

Mr. Chan buys some flour with $80. The price of flour is $x per kg. If the price is increased by $2 per kg, he will buy 2 kg less than with $80. Find the value of x.
*September 25, 2015*

**Chemistry**

You make a solution using a solute (5g) in water (total volume 100ml). The molar mass of the solute is 110 g/mol. What is the molarity? What is the concentration reported as % by mass?
*September 23, 2015*

**algebra**

what is the absolute value of -(33)
*August 19, 2015*

**Math**

Find the simple Interest; Principle $ 300 Rate 6.5% Time 1/2 year
*August 9, 2015*

**Accounting**

If a hotel rents a room for $2500. and there is an advance payment of $500, how is this posted in the city ledger
*July 9, 2015*

**Advanced Pharmacology**

You provide the manufacturer’s recommended dose of an antibiotic, which is 10mg/kg IV for a 100kg patient. You then draw a level 30 minutes after the dose. Assume rapid distribution and neglible clearance/metabolism over the 30minute period between the time of ...
*June 11, 2015*

**statisic**

The current rate of success is 70% for 200 students. When the new test is implemented, the rate increases to 85% for the 50 students who pass the test and are allowed into the program. Is this difference significant?
*June 2, 2015*

**math**

how many edges , vertices and faces does a cylinder have? some say 0 edges,0 vertices, and 2 faces but others say 3 faces, 2 edges and 0 vertices. Which is it? thank you.
*May 14, 2015*

**Math**

I am not sure what happened but I got the answer .. 153,954 is correct. thanks for the help.
*April 3, 2015*

**Math**

Mrs. Hart, at age 65, can expect to live for 25 years. If she can invest at 5% per annum compounded monthly, how much does she need now to guarantee herself $900 every month for the next 25 years? math - Reiny, Friday, April 3, 2015 at 3:05pm Present Value = 900(1 - 1.0041666...
*April 3, 2015*

**math**

Reiny, 153,954.05 is coming up wrong. any suggestions?
*April 3, 2015*

**math**

Mrs. Hart, at age 65, can expect to live for 25 years. If she can invest at 5% per annum compounded monthly, how much does she need now to guarantee herself $900 every month for the next 25 years?
*April 3, 2015*

**Science**

b 3 n
*February 3, 2015*

**accounting**

If preferred dividends are limited to the stated rate of dividend, the preferred stock is: A. noncumulative B. Cumulative C. participating D. Nonparticipating
*December 2, 2014*

**Statistics**

If a committee of 4 students is selected from a class of 16 students, how many ways can this be done?
*November 23, 2014*

**Physics**

Suppose that the swimmer in the figure below has a swimming speed relative to the water of 0.40 m/s, while the speed of the current is 2.2 m/s. If it takes the swimmer 200 s to cross the river, how wide is the river
*September 25, 2014*

**Math**

Proportion - If a 30-foot tree cast an 18-foot shadow, find the length of the shadow cast by a 24-foot tree.
*September 10, 2014*

**4th grade grammar**

card
*September 3, 2014*

**Math**

A club has three different committees each of which needs a chairperson. How many ways can the chair people be selected if only 10 people are eligible for these positions, and no one can chair more than two of the committees
*June 6, 2014*

**Math**

Each digit of a four-digit PIN can be any number from 0 to 9. What is the percentage of PINs with no digit repeated more than twice?
*June 6, 2014*

**History**

what was true of the secretary of state William henry seward
*May 22, 2014*

**Math**

Oh I see. Thank you
*May 17, 2014*

**Math**

What does it mean instead of at the top, the power is at the bottum Like instead of 2^4 The 4 is wrote smaller and below and beside the 2
*May 17, 2014*

**Math**

Determine the largest possible integer n such that 942! is divisible by 15n.
*May 17, 2014*

**Math**

Rationalize the denominator and write your answer in lowest terms (2 √ 6 + √ 3)/ ( √ 6- √ 3)
*May 17, 2014*

**grammer**

Question 2. 2. Select the sentence that is punctuated correctly. (Points : 1) The oil from Eucalyptus trees which are native, to Australia is known for its medicinal properties. The oil from Eucalyptus trees, which are native to Australia, is known for its medicinal properties...
*May 11, 2014*

**Math**

Help please
*May 9, 2014*

**Math**

If a circle is inscribed in a triangle with vertex angles 30o - 60o - 90o , then what is the area of the triangle divided by the area of the circle?
*May 9, 2014*

**Math**

In a circle whose radius is 13 cm, a central angle intercepts an arc that measures 65o. What is the arc length? Round your answer to the nearest hundredth of a centimeter.
*May 9, 2014*

**Math**

The radius of the inscribed circle is 5. If the length of the hypotenuse of the right triangle ABC is 19, what is the perimeter of the triangle?
*May 9, 2014*

**Physics**

A cannonball is dropped overboard from a boat. The cannonball sinks toward the bottom of the sea. The mass of the seawater displaced by the cannonball is exactly 2/3 the mass of the cannonball. Find the velocity of the cannonball after 10 seconds after being dropped.
*May 7, 2014*

**Corporate Finance**

Bond price: Briar Corp is issuing a 10-year bond with a coupon rate of 7 percent. The interest rate for similar bonds is currently 9 percent. Assuming annual payments, what is the present value of the bond? (Round to the nearest dollar.) $990 $872 $1,066 $945
*April 11, 2014*

**math**

a right triangle has a hypotenuse that is 59 miles long. One side is 1.05 longer than the other. What are the lengths of the two legs
*March 27, 2014*

**chemistry**

A sample of gas has a volume of 1.30 L at STP. What is the temperature in °C if the volume is 13.0 L at 2.00 atm?
*February 14, 2014*

**statistics**

The height of an adult male is known to be normally distributed with a mean of 69 inches and a standard deviation of 2.5 inches. The height of the doorway is 74 inches. What proportion of adult males will not fit under the door?
*February 9, 2014*

**physics**

the barge is like a carrier that is used on rivers to ship things.
*February 2, 2014*

**physics**

a crew member is walking on a tugboat that is pulling a barge. the tugboat is moving at a constant speed upstream in a river that has a constant downstream current. In the situation above, what is at rest relative to the tugboat?
*February 2, 2014*

**english**

What is a good thesis statement according to the disagreement of gay marriage?
*January 29, 2014*

**algebra**

need help with this problem. -(2x-(5x+2)-2+(2x+7)
*January 14, 2014*

**statistics**

Assume that thermometer readings are normally distributed with a mean of 0.0 and a standard deviation of 1,00. the thermometer is randomly selected and tested. For the case below, draw a sketch , and find the probability of the reading The given values in Celsius degrees) ...
*November 22, 2013*

**Physics**

A hammer is accelerated at 13 rad/s^2 at a radiius of rotation of 1.5 m. the tangential hammer speed is 20 m/s. a)Determine the angular velocity of the hammer b)the magnitude of the radial component of its linear acceleration c)the magnitude of the tangential component of its ...
*November 7, 2013*

**quantum physics**

The variance ÏƒX^2=âŸ¨(X^âˆ’âŸ¨X^âŸ©)^2âŸ© of an operator, X^, is a measure of how large a range its possible values are spread over (the standard deviation is given by Ïƒ=sqrt(&...
*October 7, 2013*

**quantum physics**

Suppose a particle has wavefunction Ïˆ(x,t=0)=Aexpâˆ’(x^2/2l^2). What is the average value (expectation value) of p^, âŸ¨p^âŸ©, for this state at t=0?
*October 7, 2013*

**quantum physics**

Can anyone help me to solve this problem? Suppose we have a particle in 1-dimension, with wavefunction Ae^(-|x|/2d). What is the probability to find the particle in the interval [0,d]? Please provide your answer in terms of A, d, mathematical constants such as π (entered ...
*October 7, 2013*

**quantum physics**

Can anyone help me to solve this problem? Suppose we have a particle in 1-dimension, with wavefunction Ae^(âˆ’|x|2d). What is the probability to find the particle in the interval [0,d]? Please provide your answer in terms of A, d, mathematical constants such as...
*October 7, 2013*

**MATH**

YANCEY COLLECTS PLASTIC BANKS. HE HAS THREE DIFFERENT BANKS;A PIG,A COW, AND A HORSE. HOW MANY WAYS CAN YANCEY ARRANGE HIS BANKS ON A SHELF
*September 30, 2013*

**lol**

During the bitter struggle over reconstruction policy, Congress overrode Johnson's veto of the
*September 20, 2013*

**math 4th grade**

thank you
*September 6, 2013*

**math 4th grade**

I have to follow the pattern .125, .25, .375, .5 ?
*September 6, 2013*

**math**

What percent of the first 50 positive integers contain no odd digits?
*August 20, 2013*

**Medical Office**

As a medical office manager what is a fun slogan or buzzwords that I could use to help my employees to remember the coding process the types of procedures and each three CPT categories?
*May 15, 2013*

**college Chemisrty**

at what kelvin temperature will 25.2 of xe occupy a volume of 645 L at pressure of 732 torr?
*May 13, 2013*

**Ethics and social responsibility**

You work hard in your office overtime weekends and early mornings.you get paid well but despise that your coworkers are getting paid the same pay for less work then what you are doing and get promoted ahead of you.
*May 9, 2013*

**college Chemistry**

What would you expect to be the chemical names of the main gases that were dissolved in the tap water?
*May 5, 2013*

**college Chemistry**

Conductivity test, what controls the brightness of the light? (hint: think about your tapwater abd NaCl results and why they were different)
*May 5, 2013*

**College Chemistry**

I assume you are looking to predict the solution of the salt. yes Bob
*May 5, 2013*

**College Chemistry**

Yes
*May 5, 2013*

**College Chemistry**

What must we know a given ionic salt to be able to predict whether is is a good or poor conductor, w/o testing its conductivity?
*May 5, 2013*

**Chemistry**

one morning you are given 3 test tubes of aqueous solutions of compound X: the "A" tube was set up as unsaturated, while "B" was set up as Saturated in a beaker, then poured of into the tube, and "C" was carefully set up as supersaturated. At ...
*May 5, 2013*

**Chemistry**

What must we know a given ionic salt to be able to predict whether is is a good or poor conductor, w/o testing its conductivity?
*May 5, 2013*

**Mathabatha**

Ways in which xenophobia impacts in our communities
*April 23, 2013*

**Calculus**

2x+18x^-3
*April 23, 2013*

**College Chem**

charles law: 7.89 l sample of gas had pressure of 850 torr. what volume will it occupy if the pressure is changed to 457 torr? (torr is a measurement of pressure. 760 torr = 1 atmosphere
*April 22, 2013*

**Chemistry**

Need type of reaction and balance of (NH4)2S+CuSO4=
*April 22, 2013*

**Chemistry**

(NH4)2S+CuSO4=
*April 22, 2013*

**life orientation**

discuss in a paragraph of 150 words way in which flood,earthquake nd drought can takes responsibility to provide safe and healthy living environment
*April 18, 2013*

**College Chemistry**

The Water loss by the sample, and the percent by weight of water in the unknown hydrates is 34.78%H2O. which of the ten possible hydrates are the most likely ones to be your unknown based on the percent by weight?
*April 7, 2013*

**Chemistry**

The water loss by the sample, and the precent by weight of the water in the unknown hydrates 34.78%H2O. which of the ten possible hydrates are the most likely ones to be your unknown based on the percent by weight?
*April 7, 2013*

**Chenistry**

which of the ten possible hydrates are the most likely ones to be your unknown based on the percent by weight?
*April 7, 2013*

**Stats **

The scatter diagram of the lengths and widths of the petals of a type of flower is football shaped; the correlation is 0.8. The average petal length is 3.1 cm and the SD is 0.25 cm. The average petal width is 1.8 cm and the SD is 0.2 cm. 1. One of the petals is 0.2 cm wider ...
*March 28, 2013*

**Stats **

The scatter diagram of the lengths and widths of the petals of a type of flower is football shaped; the correlation is 0.8. The average petal length is 3.1 cm and the SD is 0.25 cm. The average petal width is 1.8 cm and the SD is 0.2 cm. 1. One of the petals is 0.2 cm wider ...
*March 28, 2013*

**grammar**

Is saying "she's sitting in back of me" poor grammar.
*March 23, 2013*

**Eng1511**

The writer is the guy who fell in love with this young girl Mimmy who was a tenant with the writers friend is whre he saw Mimmy. She was a young girl who was committed to her studies with regards to the writer en his friend Mimmy would only greet them en go her own way while ...
*February 26, 2013*

**life orientant**

Discuss5 ways in which the teenage pregnapregnancy prblem impacts on the comcommunity.provide relevant sources to. Support your claims
*February 21, 2013*

**Physics**

A diverging lens has a radius of curvature of 6 cm. A 2 cm high object is placed 5 cm in front of the lens. Find: Si , Di , and draw the situation.
*February 20, 2013*

**math**

ok thank you for trying to help me
*February 12, 2013*

**math**

sorry miss sue it was attended for you I apologize
*February 12, 2013*

**math**

cause Jared and I are working on math together are you the HOMEWORK POLICE?
*February 12, 2013*

**math**

so it is 1 1/4?
*February 12, 2013*

**math**

5 3/4 + 6 2/4 = 11 10/8 not sure what do from here?
*February 12, 2013*

**math**

3 7/9 x 6 2/5= I have to estimate?
*February 12, 2013*

**Math**

Thank you
*February 12, 2013*

**math**

jenna lives 4 3/10 miles from school. She estimates that she travels 4x2x5 or 40 miles each week. Is her estimate an overestimate or an underestimate? explain.
*February 12, 2013*

**Math**

I don't know if your not going to help me then don't post on my site
*February 12, 2013*

**Math**

5 3/4 + 6 2/4 = I need to show my work
*February 12, 2013*

**math**

2/3 x 5/6 x 14 =
*February 11, 2013*

**math**

Brittany is making trays of fudge. her recipe calls for 2/3 cup of walnuts for each batch of fudge. How many cups of walnuts does she need to make 27 batches of fudge I need to show how I got this answer
*February 11, 2013*

**math**

7/8 x 4/5 = I got 28/40 so is it 7/10
*February 11, 2013*

**4th grade simple division**

8÷1=8
*January 30, 2013*

**math**

what would 3/4 be closet to 0,1/2 or 1
*January 29, 2013*

**Astronomy**

buenos aires and sydney are both at latitude 34 south but buenos aires is at longitude 58 west and sydney is 151 east. how many hours after passing through the zenith in buenos aires will it pass through the zenith in sidney?
*January 19, 2013*

**economics**

Select a product and for that the government places a mandated price ABOVE the equilibrium price, based on your research how would this affect the market equilibrium, explain your view.
*January 17, 2013*

**math**

how much money must you deposit into an account that earns 3% monthly to have $1000 after 4 years
*January 10, 2013*