Saturday

May 23, 2015

May 23, 2015

Total # Posts: 311

**Math**

There are 64 students. 80% scored a 75 on a final test. How many students scored a 75?
*May 6, 2015*

**Geometry **

we have line QR parallel= to line ST, PQ = 8, QS = , and PT = 12. Find PR.
*March 28, 2015*

**Physics**

The crankshaft of an engine increases its spin from 1,200 rpm to 1,500 rpm in 0.50 s. What is its angular acceleration
*December 11, 2014*

**Calculus**

A wire of length 12 meter is cut into two parts; one part is bent to form a square, and the other is bent to form an equilateral triangle. Where the cut cut should be made if a) the sum of the two areas is to be a maximum? b) the sum of the two areas is be a minimum?
*October 30, 2014*

**MATH**

10 5/12 ÷ 1/10 =
*July 18, 2014*

**PSY/240 Hunger, Eating,**

I am confused, please explain what are set points and what are settling points in relation to weight control?
*July 2, 2014*

**Psy 270**

Where can I find the best resources to research this question besides the text book? Psychology has many applications in our lives, both professionally and personally. How might having a background in psychology help you in your professional life? How might it help you in your...
*May 28, 2014*

**Social Studies**

Name the 6 founding Fathers of the us
*May 12, 2014*

**Psychological and Psychophysiological Stress Disor**

What kind of traumatic events cause undiagnosable psychological disorders?
*April 20, 2014*

**sy270**

What questions should I ask the parents of four year old Clara about her sudden change of behavior and refusal to go back to pre-school.
*April 13, 2014*

**Psy270**

Individual Clinical Assessment Mr. and Mrs. Lawson brought their 4-year-old adopted daughter, Clara, to see Dr. Mason, a psychiatrist. Clara was polite in greeting Dr. Mason, but did not smile and kept her gaze down as she took a seat. Mr. and Mrs. Lawson sat next to Clara and...
*April 13, 2014*

**psy220**

the American emphasis on the pursuit of happiness
*February 24, 2014*

**Physics Help..**

A small cube (m=0.290 kg) is at a height of 261 cm up a frictionless track which has a loop of radius, R = 28.71 cm at the bottom. The cube starts from rest and slides freely down the ramp and around the loop. Find the speed of the block when it is at the top of the loop. A ...
*February 12, 2014*

**Math**

If the cost is 3.00 doars per sq ft to clean a carpet, how much will it cost to clean a carpet 12.5 ft x 23ft?
*January 30, 2014*

**psy/270**

⦁ What do researchers mean by ‘subjective well-being’? How is this construct measured?
*January 20, 2014*

**economics**

A speculator sells a stock short for $50 a share. The company pays a $2 annual cash dividend. After a year has passed the seller cover a short position of $42. What is the percentage return on the position (excluding the impact of any interest expense and commission)?
*January 19, 2014*

**economics**

An investor sells a stock short for $36 a share. A year later the investor cover the position at $30 a share. If the margin requirement is 60% what is the oercentage return earned on the investment? now assume the price is at $42 when the investor closes the position
*January 19, 2014*

**MATH**

5.7 + 33/100 + 61/1000 =
*January 8, 2014*

**Physics**

A bullet (m = 0.0250 kg) is fired with a speed of 92.00 m/s and hits a block (M = 2.50 kg) supported by two light strings as shown, stopping quickly. Find the height to which the block rises. Find the angle (in degrees) through which the block rises, if the strings are 0.540 m...
*January 6, 2014*

**abnormal behavior**

1. Some criteria used for reaching a diagnosis cannot be observed directly 2. Personality disorders can be similar to each other. 3. People with different personalities can be given the same diagnosis 4. Do you think that personality disorders are true mental illnesses? Why or...
*December 19, 2013*

**Math**

Thanks
*November 10, 2013*

**Math**

5 7/15
*November 10, 2013*

**Math**

3 1/6 + 2 3/10 = Give answer in simplest form
*November 10, 2013*

**Math **

3 7/10 - 1 2/5 = Give answer in simplest form
*November 10, 2013*

**Math**

2 7/12 + 1 2/3 = Give answer in simplest form
*November 10, 2013*

**Math**

1 9/10
*November 10, 2013*

**Math **

1 1/5 + 7/10 = Give answer in simplest form
*November 10, 2013*

**MATH**

2 3/4 + 1/12 = Give answer in its simplest form
*November 10, 2013*

**Fedora**

. If /home/jenny/draft and /home/alex/letter are links to the same file and the following sequence of events occurs, what will be the date in the opening of the letter? __________ a. Alex gives the command vim letter. b. Jenny gives the command vim draft. c. Jenny changes the ...
*November 7, 2013*

**chemstry**

2 half years
*October 31, 2013*

**MATH**

if john spent $130 and matt spent $480, john will have three times as much money left as matt. both boy's started with the same amount of money. how much money did each boy's start with ?
*October 2, 2013*

**MATH**

if john spent $130 and matt spent $480, john will have three times as much money left as matt. how much money did each boy start with ?
*October 2, 2013*

**math**

if john spent $130 and matt spent $480, john will have three times as much money left as matt. how much money did each boy start with ?
*October 2, 2013*

**Math**

There are how many hundredsn the number 344,298
*September 4, 2013*

**Math**

in the numeral 3,000,000, there are how many thousands
*September 4, 2013*

**Math**

If a population is growing at 3.5 percent compounded continuously how long before it doubles?
*August 14, 2013*

**math**

Brilli the ant placed the numbers 1,2,…,n in order clockwise around a circle. She can create an infinite sequence A={aj}∞j=0 of integers by letting a0=k∈{1,2,…,n} and constructing ai+1 from ai by taking the integer that is ai positions clockwise in the ...
*July 16, 2013*

**Math**

Express 2.4 as a fraction in its simplest form
*July 14, 2013*

**Algebra**

Leila purchased a prepaid phone card for . Long distance calls cost cents a minute using this card. Leila used her card only once to make a long distance call. If the remaining credit on her card is , how many minutes did her call last?
*July 8, 2013*

**chemistry**

You have 10.0 g each of Na, C, Pb, Cu and Ne. Which contains the smallest number of moles?
*June 3, 2013*

**chemistry**

How many grams of carbon dioxide will form if 4.4 g of propane reacts with 16.0 g of oxygen producing 7.2 g of water?
*May 20, 2013*

**Discrete Math**

For sets A, B, C is a subset of U, prove or disprove (with a counter-example) the following: If A is a subset of B, B is not a subset of C, then A is not a subset of C,
*April 5, 2013*

**Discrete Math**

Let n be positive integer greater than 1. We call n prime if the only positive integers that (exactly) divide n are 1 and n itself. For example, the first seven primes are 2, 3, 5, 7, 11, 13 and 17. (We should learn more about primes in Chapter 4.) Use the method of exhaustion...
*April 5, 2013*

**Discrete Math**

If n is a positive integer and n > 1, prove that (n over 2)+ (n-1 over 2) is a perfect square.
*April 4, 2013*

**Discrete Math**

If n is a positive integer and n > 1,prove that (n) + (n-1) is a perfect sq (2) ( 2 )
*April 4, 2013*

**Discrete Math**

8 trophies can be awarded to 30 people in how many different ways
*April 4, 2013*

**math(statistics)**

suppose a random variable X can equal to 1,2,3,4,or 5. if P(x<3)=.4 and p(x>3)=.5 (a)p(x=3) and b P(x<4)
*March 19, 2013*

**Math**

Name the vertices of a square whose angles are f,g,a,l
*February 12, 2013*

**Science**

Um , please guys I need the right answer. I'm taking the test to. The name " the right answer" can you give me the right answers that were correct on the test?
*February 1, 2013*

**Math**

What is 2 2/4 +2 2/4 + 6 1/2=?
*January 23, 2013*

**Math**

When you divide a whole number by a fraction with a numerator of 1 explain how you can find the quotient?
*January 23, 2013*

**Math**

Sue has 8 yards of twine she cuts the twine into equal pieces of 3/4 feet each how many pieces can he cut?
*January 23, 2013*

**Math **

If you have 8 yards of twine and you cut the twine into 3/4 pieces each . How many pieces can you cut?
*January 23, 2013*

**math**

show me how to calculate percentage return on the security if the payoff to the security in one year is $1000 and the security costs is $1500 today?
*January 11, 2013*

**Physics**

A motorist travels 1600 m at 80 m/s and 750 m at 100 m/s. What is the average speed of the motorist for this trip.
*December 12, 2012*

**Economics**

Opera CD buyers are located in New York and Los Angeles. At the current price for a CD, $25 in both New York and Los Angeles, aggregate demand for Opera CD is 10,000 units (i.e. the sum of the demand in New York and Los Angeles); and the price elasticity of demand for Opera CD...
*December 8, 2012*

**chemistry**

What volume of 1.75M CaSO3 solution could be prepared from 450g of CaSO3?
*December 2, 2012*

**chemistry**

What volume of 1.75M CaSO3 solution could be prepared from 450g of CaSO3?
*December 2, 2012*

**chemistry-rate of reaction**

The fictitious compound, arrhenium fluoride (AhF), reacts with itself to form a dimer with the formula Ah2F2. The reaction is second order in AhF. The value of the rate constant is 3.591×10−3 M−1s−1. What is the initial rate of reaction in a reactor ...
*December 2, 2012*

**science**

Ahaan pls
*November 17, 2012*

**science**

pls help me
*November 17, 2012*

**crim procedure**

Which of the following rights is dependent upon whether formal charges have been filed or a criminal prosecution has begun? Answer the Fourth Amendment protection against unreasonable search and seizure the Fifth Amendment privilege against self-incrimination the Sixth ...
*November 11, 2012*

**calculus**

A 13 foot ladder leaning against a wall makes an angle of degree radians with the ground. The base of the ladder is pulled away from the wall at a rate of 2ft/sec. How fast is degree changing when the base of the ladder is 5 feet way.
*November 4, 2012*

**Physics**

An arrow is shot into the air at a velocity of 25 m/s and an angle of 32 degrees above horizontal. It lands at the same level that it was shot from. How long is the arrow in air? How far does the arrow travel?
*October 17, 2012*

**U.S History**

are those correct?
*October 17, 2012*

**hist**

Which of the following was a problem faced by the average Chinese citizen during the Song dynasty? a.the shrinking use of the civil service exam and thus the lack of opportunity to obtain a government position b.the control of the Chinese treasury by northern invaders led to ...
*October 10, 2012*

**Physics**

On a hot day in summer, your friends decide to go rafting down a local river. Since you are afraid of water, your job is to provide them with refreshments from a bridge as they pass. When the first raft is 10 meters away, traveling at 3.5 m/s, you drop a can of soda, which ...
*October 8, 2012*

**chemistry **

How to balance simple oxidation-reduction reactions by the half-reaction method. Mg (s) + N2 (g)= Mg3N2 (s)
*September 30, 2012*

**Chemistry **

I have a question regarding the titration curve. When the ph is equal pKa that mean there are equal amount of conjugate acid to conjugate base. When a weak acid dissociates for example H3Po4 H+ H2PO4- My problem: I don’t understand how the ph rises after the ...
*September 13, 2012*

**DrBob222 : need some clarification**

Hi DrBob222, Could you please explain want you typed: *You must have 10 mmoles of that still un-titrated (you had 10 millimoles of the original and that is gone but you still have 10 mmols of the other acid remaining. Are you saying I have 10 mmoles of each acid, if so how did...
*September 11, 2012*

**DrBob222 : need help with the problem**

An unknown compound, X, is though to have a carboxyl group with a pKa of 2.0 and another ionizable group with a pKa between 5 and 8. When 75 mL of 0.1M NaOH is added to 100 mL of a 0.1M solution of X at pH 2.0, the pH increases to 6.72. Calculate the pKa of the second ...
*September 11, 2012*

**chem -please help!!!!!!!!!!!!**

An unknown compound, X, is though to have a carboxyl group with a pKa of 2.0 and another ionizable group with a pKa between 5 and 8. When 75 mL of 0.1M NaOH is added to 100 mL of a 0.1M solution of X at pH 2.0, the pH increases to 6.72. Calculate the pKa of the second ...
*September 10, 2012*

**chemistry buffers**

What molar ratio of HPO4 2- to H2PO4 - in solution would produce a pH of 7.0? Phosphoric acid (H3PO4), a triprotonic acid, has pKa values: 2.14, 6.86, and 12.4. Only one of the pKa values is relevant here. how do i know which pka value to use.. please explain
*September 9, 2012*

**DrBob222 please check**

When pH = pKa - 1, (A^-)/(HA) = 0.1 BECAUSE log 0.1 = -1.
*September 3, 2012*

**chem**

Pka=pH when[HA]=[A- ]. What is [A-]/[HA] WHEN PH=PKA+1 AND WHEN pH=pka-1
*September 3, 2012*

**Math**

#4 should be A) 6 cm.
*August 26, 2012*

**Math**

Can you please check my answers, thank you #2. 5/y+4 + 11/y^2=y-12 = 7/y-3 Answer -2 #4 The length of a rectangle is 2 cm more than twice its width. If the perimeter of the rectangle is 40 cm, find the length of the rectangle. A. 6 cm B. 9 cm C. 11 cm D. 14 cm Answer B = 9cm #...
*August 26, 2012*

**math**

2200, 6.02%
*August 26, 2012*

**MATH**

Answer: The total number of possible outcomes is 36 and there are 21 possible "winners." Therefore, the probability of winning is 21 out of 36 or 21 divided by 36. If you do the division, the answer is 0.58333333 or you have a 58.333333% chance that on a single roll...
*August 26, 2012*

**English lll**

Which of the following statements about Anne Bradstreet is NOT true?
*August 19, 2012*

**Algebra**

4. √36x^4 y^16 answer: 18x^2 y^8 #5 5√243a^25 b^5 answer: 3a^5 b
*August 3, 2012*

**Algebra**

Please let me know if i answered these correctly thanks 1.Which property of the real numbers is illustrated by the following statement? 4(3x) = (4 ∙ 3)x answer: distributive property 2. Which property of the real numbers is illustrated by the following statement? 8(c + ...
*August 3, 2012*

**communications**

Number 6. should be "A" make your acceptance contingent on a written offer.
*July 29, 2012*

**communications**

2.Which of the following is NOT a technique for emphasizing material in a résumé? A. Presenting it in vertical lists B. Including it as part of a lengthy paragraph C. Offsetting it with white space D. Positioning it at the top of a page 1.) I think it's "...
*July 29, 2012*

**business Communication**

1. Which of the following statements explains why threats are NOT effective for motivating people? A. Threats reduce tension. B. Threats ensure that appropriate actions are not abandoned. C. Threats produce permanent change. D. Threats provoke counteraggression. I think the ...
*July 29, 2012*

**Business communication**

Which of the following is NOT one of the three steps to take when audience benefits are hard to identify or develop? A. Identify the feelings, fears, and needs that may motivate your audience. B. Identify the objective features of your product or policy that could meet the ...
*July 29, 2012*

**Business Communication**

oops i think it's "D" because parallel structure puts words phrases or clauses in the same logical form.
*July 29, 2012*

**Business Communication**

Which of the following is NOT an example of parallel structure? A. "Yoga can help you develop flexibility, reduce stress, and increase relaxation." B. "Learn how to analyze business audiences, improve your style, and edit thoroughly." C. "You are all ...
*July 29, 2012*

**NEED HELP ELECTRONICS**

i will admit this posting is pretty ridiculous just have a fever hard to think but thanks dr bob222
*July 19, 2012*

**NEED HELP ELECTRONICS**

2. Two electronics technicians are looking at the technical manual for a piece of electronic equipment. The manual refers to a particular resistor as a “2.2 megohm resistor.” Technician A says that this means that the resistance value of the resistor is 22,000 ohms. ...
*July 19, 2012*

**Physics**

What is the force at which a bowling ball when it sticks the pins given the final speed of the bowling ball. Now account for friction and angular rotation of the ball
*July 3, 2012*

**Math**

What decimal am I? My digit in the tenth place is twice my digit in the hundredths place.my digit in the hundredths place is odd,but not 1
*May 29, 2012*

**Algebra**

Use the graph of the function to estimate: a. f(2) b. f(–4) c. All x such that f(x) = 0
*May 13, 2012*

**Physics**

A 20lb ball is 1 ft. in diameter and has a angular velocity of 300 rpm when it is 2 ft. away from the plate. The coefficient of rolling friction between the surface and the ball is μs = 0.3. It strikes the 1-ft. high, 10-lb plate that is held in place by an unstretched ...
*April 30, 2012*

**chemistry**

what is the molarity of a solution if 255g AgNO3 is dissolved in 1500 mL of solution
*April 3, 2012*

**precal**

cotx=cosx/sinx Therefore, (cosx/sinx)sinx=cosx cosx=cosx
*March 23, 2012*

**math**

A rectangular dog pen is to be sectioned off into two seperate areas and made to enclose area of 225 feet. Find the dimensions of the pen that will require the least amount of fencing material.
*March 23, 2012*

**Algebra 2**

Quotient is 2x^2+9x-8 Remainder is -25
*March 23, 2012*

**word problems in algebra**

the hours or min in 345 seconds how do I construct the equation and solve
*March 19, 2012*