Monday

January 26, 2015

January 26, 2015

Total # Posts: 76,665

**League of Nations**

How did the US Congress feel about the League of Nations
*January 20, 2015*

**Genetics**

Chemical analysis of the DNA of a virus from Mars reveals that it has 48% A, 48% T, and 4% G, Suggest some possible structures for this DNA. I don't quite understand this question. All i can come to think about is that A pairs with T evenly because of the percentages, ...
*January 20, 2015*

**economics**

The _____ Plan, favored by _____ States, proposed giving States equal representation in a unicameral Congress.
*January 20, 2015*

**Math**

Is x(x+6)=0 the same as x = 0 and x + 6 = 0?
*January 20, 2015*

**jp**

C=π*d d=diameter=2r r=radius 176=π*d divide both sides of the equation by π 176/π=d take that answer and divide it by 2 Hope this helped :)
*January 20, 2015*

**Math**

If it takes a tub 20 minutes to fill up when the water is on all the way and 15 minutes to drain, how long will it take for the tub to be completely drained when the water is left all the way on? In 1 hour the tub can fill up 3 times and the tub can drain 4 times. So will it ...
*January 20, 2015*

**Math**

Find the interval for b such thtat the equation has a t least one real solution. i. X^2+bx-6=0 ii. 2X^2+bx-7=0 iii. x^2+bx+3=0 iv. 3x^2+bx+5
*January 19, 2015*

**Math**

f(x)=x64-4x^2+k. Find the values of k so thath the zeros of f satisfy the specified charachteristics. a.four real zeros b.two real zeros, each of multiplicity of two c.two real zeros and two complex zeros d.four complez zeros a.I don't know if this range goes for this or b...
*January 19, 2015*

**Math**

In 8.061, what is the place value of 6?
*January 19, 2015*

**Math**

Solve for x? 1. Divide both sides by -2. This is done to isolate the variable -2x = -16 --- ---- -2 -2 x = 8 <-----
*January 19, 2015*

**Math**

please help
*January 19, 2015*

**Math**

tina, troy and nate had a total of 25 equal-sized square tiles to place over a square grid. Tina used 8/25 of the square tiles. Troy used 1/5 of the square tiles. what fraction of the square grid must Nate place the tiles on so that 1/5 of the square grid is not covered.
*January 19, 2015*

**law**

What kind of questions trigger the reading of the miranda rights? Is there a case that deals with this specific issue... whether the question asked by the police was part of an interrogation or just an informal question getting basic information? Do these ever overlap?
*January 19, 2015*

**Math**

johnny is jogging along a track. He has already jogged 1 2/3 miles. He plans to jog a total of 3/14 miles. How many miles does he have left to jog?
*January 19, 2015*

**Math**

a snail is at the bottom of a well. in the first 10 minutes, the snail climbs 23 7/12 inches. In the next 10 minutes, it climbs 19 5/6 inches. How far is the snail from the bottom of the well after 20 minutes?
*January 19, 2015*

**Math**

arnold buys 8/9 pound of ground turkey. He uses 3/4 pound of the ground turkey to make meatballs. How many pounds of ground turkey are left?
*January 19, 2015*

**Math**

please help
*January 19, 2015*

**Math**

steve picks 55 pounds of pears. He packs equal amount of pears into 6 bags. He then has 4 pounds of pears left. What is the weight of pears in each bag?
*January 19, 2015*

**Math**

jeremy puts an empty container under a leaking faucet. In the first hour, 3/8 quart of water collects. In the second hour, 1/6 quart of container of water collects. how much water collects in the container in the two hours?
*January 19, 2015*

**Math**

11*12=132
*January 19, 2015*

**Math**

Hillside Little League has 12 teams. Each team plays each of the other team twice. How many games are played?
*January 19, 2015*

**Math**

what would the graph look like for the equation f(x)=ax+b/cx+d when a>0, b<0, c>0, d<0?
*January 19, 2015*

**algebra**

What is the area of the largest rectangle with lower base on the x-axis and upper vertices on the curve y = 27 - x2
*January 19, 2015*

**Math**

how'd you get 1/20-1/15?
*January 19, 2015*

**Math**

How long will it take for the tub to completely empty with thte drain open and the water running at full speed? Given: it takes 20 minutes to fill the tub and 15 minutes to drain the tub when the water is on all the way, full speed.
*January 19, 2015*

**Math**

Write a rational function satisfying the following criteria. vertical Asymptote: x=-1, slant asymptote: y=x+2, zero of the function: x=3 I had f(x)=x^2+3x+2/x+1, that only works for the asymptotes and not the zero can someone please help me figure how to satisfy all three ...
*January 19, 2015*

**math**

integrate (Abs value(secx)^2/cscx)sinx dx
*January 19, 2015*

**Chemistry**

If equal volumes of the following are combined, would they form buffered solutions? Why or why not? .1M HF and .05M NaF I'm am a bit confused about how I can figure out if these will form buffers or not, so I'd really appreciate it if someone could explain it to me. ...
*January 19, 2015*

**calc**

but with integration there is no power rule wouldn't I have to use substitution?
*January 19, 2015*

**calc**

integrate (3+x)x^(1/2)dx=? please help I have no idea how to integrate this problem
*January 19, 2015*

**Please reply Dr. Bob**

So the answer is that this will form a buffer?
*January 19, 2015*

**Chemistry**

Okay, thank you Dr. Bob. So just to confirm, it does not matter that the weak acid and its conjugate base are added in different amounts?
*January 19, 2015*

**Chemistry**

Please help! If equal volumes of the following are combined, would they form buffered solutions? Why or why not? .1M HF and .05M NaF I'm am a bit confused about how I can figure out if these will form buffers or not, so I'd really appreciate it if someone could explain...
*January 19, 2015*

**ap calc**

the original should be ((x^2-4)^2)^(1/2) dx
*January 19, 2015*

**ap calc**

then how would I solve because the derivative of x^2-4 =2x and in the original there is only a dx.
*January 19, 2015*

**ap calc**

integrate ((x^2-4)^2))^(1/2) Would the 2 and the 1/2 cancel
*January 19, 2015*

**Chemistry**

If equal volumes of the following are combined, would they form buffered solutions? Why or why not? 1) .1M NaC2H3O2 and .1M HF 2) .1M HF and .05M NaF I'm am a bit confused about how I can figure out if these will form buffers or not, so I'd really appreciate it if ...
*January 19, 2015*

**chem/stats**

Find the absolute error for the answer of the following equation: square root of 3.24 plus-minus 0.08 end root equal 1.80 plus-minus ?
*January 19, 2015*

**analytical chem**

You have a bottle labeled “53.4 (±0.4) % w/w NaOH” with a density of 1.52 (±0.01) g/mL. You use 16.7 (± 0.2) mL of the NaOH to prepare 2.00 (±0.02) L of 0.169M NaOH. Report the absolute error for the 0.169M of NaOH. You may assume ...
*January 19, 2015*

**Anal Chem**

A method for the analysis of the drug diazepam in blood consistently produces results that are low by -5.4%. If the measured concentration of diazepam in a patient’s blood sample is 2.02 ppm, what must be the actual concentration in their blood (in ppm)?
*January 19, 2015*

**Analytic Chem**

You have a bottle labeled “53.4 (±0.4) % w/w NaOH” with a density of 1.52 (±0.01) g/mL. You use 16.7 (± 0.2) mL of the NaOH to prepare 2.00 (±0.02) L of 0.169M NaOH. Report the absolute error for the 0.169M of NaOH. You may assume ...
*January 19, 2015*

**Science**

Is "how did our planet form" a scientific question?
*January 19, 2015*

**math**

A survey of students determined that 14 drove to school, 28 took the bus, 8 walked, 35 shared a ride and 15 had another means of transportation to school. On a pie chart, the slice representing students who took the bus would be approximately _______ degrees.
*January 19, 2015*

**Science**

How does cell differentiation connect to other branches of science or STEAM (science, technology, engineering, art, mathematics)
*January 19, 2015*

**ap calc**

ok thanks
*January 19, 2015*

**ap calc**

where does the one half come from in F(x)
*January 19, 2015*

**ap calc**

If f(x)= (2x+7)^(1/2), where F'(X)=f(x) and F(1)=7, then F(x)=? I know I need to use integration but I do not know how to take the anti derivative of the equation
*January 19, 2015*

**calc**

if f'(x)=3x^2-2x+1 and the graph of f(x) contains the point (2,2). find f(x). Please help I know I need to use integration
*January 19, 2015*

**arithmetic**

0.2[5.28-(0.7)=
*January 19, 2015*

**mathematics **

Arrange the following fractions in ascending order 7/15,5/12,3/7
*January 19, 2015*

**English**

okay thank you!!
*January 19, 2015*

**English**

okay, but what does it mean?
*January 19, 2015*

**English **

What do you think is meant by "linguistic playfulness" ?
*January 19, 2015*

**chem**

What volume of 0.0658 M calcium hydroxide is required to neutralize 45.10 mL of 0.0242 M nitric acid?
*January 19, 2015*

**chemistry**

When hydrochloric acid reacts with magnesium metal, hydrogen gas and aqueous magnesium chloride are produced. What volume of 4.8 M is required to react completely with 2.60 g of magnesium?
*January 19, 2015*

**geometery Indirect Measurement**

For triangle MNP shown, find the value of x and the measure of each of the three angles.
*January 19, 2015*

**Calculus**

a student is drinking a milkshake with a straw from a cylindrical cup with a radius of 5cm. if the student is drinking at a rate of 3.5cm^3 per second, how fast is the level of a milkshake dropping?
*January 19, 2015*

**Biology**

You have a stock solution of 100mg/100ml methylene blue and you need 6.0 ml of final solution at 2mg/100ml. Design a serial dilution using volumes between 0.1 and 10 ml. Final volume must be 6ml.
*January 19, 2015*

**Biology**

You have a bacterial suspension and you need to dilute it to 0.0010 of the initial concentration so that you can determine the number of colonies per milliliter. The volumes must be between 0.1 and 2 ml. Your final volume must be 1 milliliter.
*January 19, 2015*

**Biology**

You need 25ml of 2% milk solution (v/v. How much milk and water will you need?
*January 19, 2015*

**Biology**

You have been asked to make 200ml of 50% detergent solution (v/v). How would you do it?
*January 19, 2015*

**Biology**

You need to prepare 270ml of a 20% sucrose solution (w/v). Sucrose has a molecular formula of C12H22O11. How would you prepare this solution?
*January 19, 2015*

**Math**

0.5 ≤ y __ 8
*January 19, 2015*

**Math**

Does (2+5i)+(-2-4i) equal to 0+1i, or i?
*January 18, 2015*

**Math**

You can cross-multiply 5 -- * 2800 7 5 -- * 400 = ???? 1 Or Divide 5 by 7 and multiply the product by 2800.
*January 18, 2015*

**physics**

You're sailboarding at 6.1m/s when a wind gust hits, lasting 6.8s accelerating your board at 0.49m/s2 at a 35∘ to your original direction. 1. Find the magnitude of your displacement during the gust. Express your answer using two significant figures. 2. Find direction...
*January 18, 2015*

**Physics**

Thanks! One question: Do I have to convert km/h to m/s at the beginning? Will I get the same answer if I convert at the end?
*January 18, 2015*

**Calc**

Find the point on the parabola x+y^2=0 that is closest to the point (0,-3).
*January 18, 2015*

**physics**

A car, initially going eastward, rounds a 90 ∘ curve and ends up heading southward. If the speedometer reading remains constant, what is the direction of the car's average acceleration vector? Express your answer using three significant figures.
*January 18, 2015*

**physics**

Write an expression for a unit vector at 45∘ clockwise from the x-axis. Express your answer in terms of the unit vectors i^ and j^.
*January 18, 2015*

**physics**

You're sailboarding at 6.1m/s when a wind gust hits, lasting 6.8s accelerating your board at 0.49m/s2 at a 35∘ to your original direction. 1. Find the magnitude of your displacement during the gust. Express your answer using two significant figures. 2. Find direction...
*January 18, 2015*

**physics**

An object is moving in the x-direction at 1.1m/s when it undergoes an acceleration a⃗ =0.56j^m/s2. Find its velocity vector after 4.8s . Express your answer as a comma-separated pair of components. Express your answer using two significant figures
*January 18, 2015*

**PED 121**

Question 3. 3. Lesson plans should be infused with local, state and national standards in order to support (Points : 1
*January 18, 2015*

**Math**

How do you write a quadratic equation with information saying that it opens upward, has a pattern of 1, 3, 5, and a vertex of (-4,5)?
*January 18, 2015*

**Mathematics arithmetic sequence**

14-3n
*January 18, 2015*

**statistics**

The 2003 Statistical Abstract of the United States reported the percentage of people 18 years of age and older who smoke. Suppose that a study designed to collect new data on smokers and nonsmokers uses a preliminary estimate of the proportion who smoke of .32. a. How large a ...
*January 18, 2015*

**chemistry**

Lol
*January 18, 2015*

**physics**

A car, initially going eastward, rounds a 90 ∘ curve and ends up heading southward. If the speedometer reading remains constant, what is the direction of the car's average acceleration vector? Express your answer using three significant figures.
*January 18, 2015*

**physics**

Write an expression for a unit vector at 45∘ clockwise from the x-axis. Express your answer in terms of the unit vectors i^ and j^.
*January 18, 2015*

**physics **

A model rocket is launched straight upward. Its altitude y as a function of time is given by y=bt−ct2, where b = 80m/s , c = 4.9m/s2 , t is the time in seconds, and y is in meters. 1. Use differentiation to find a general expression for the rocket's velocity as a ...
*January 18, 2015*

**chemistry**

The combustion of a compound which contains only C and H yields 2.58 g of CO2 and 0.53 g of H2O. What is the empirical formula of the compound?
*January 18, 2015*

**Physics**

the coefficient of friction between block A and the horizontal surface is 0.43. What must be the weight of teh hanging block B if this block is to descend at constant speed once it has been set into motion? Mass of block A is 5.0 kg
*January 18, 2015*

**Alcohols,phenolsðers**

I asked this question & wanna know ANS
*January 18, 2015*

**Alcohols,phenolsðers**

How2 convert CH3OH into CH3CH2OH
*January 18, 2015*

**Calculus**

1. The radius of a sphere is expanding at a rate of 14 in/min. a) Determine the rate at which the volume is changing when the radius is 8 in. b) Determine the rate at which the surface area is changing when the radius is 8 in. 2. A particle moves along a path described by y=4-...
*January 18, 2015*

**French**

Is "vieil homme" or "homme vieil" correct? I think it is the former because it describes age.
*January 18, 2015*

**Science**

guys, please give me any ideas for a investigatory project in physics ???
*January 17, 2015*

**math**

thank you so much Ms.Sue :))
*January 17, 2015*

**math**

• what is statistics • Perspective statistics • inferential statistics • Data statistics • Example of a Quantitative data • Example of a Qualitative data • What is population •what are the different scale of measurement • what are ...
*January 17, 2015*

**Calculus**

1. The radius of a sphere is expanding at a rate of 14 in/min. a) Determine the rate at which the volume is changing when the radius is 8 in. b) Determine the rate at which the surface area is changing when the radius is 8 in. 2. A particle moves along a path described by y=4-...
*January 17, 2015*

**engineering**

In an electric car, regenerative braking is used to recharge batteries. The principle of regenerative braking involves converting the kinetic energy of the vehicle into energy stored in a battery. If a car is traveling at a speed of 30 km/h and is stopped completely by braking...
*January 17, 2015*

**AP CHEMISTRY**

an unknown metal reacts with chlorine to produce 6.84 g of metal chloride. when metal chloride dissolves in 100 mL of solvent the metal ion concentration is 0.43 M. What is the unknown metal?
*January 17, 2015*

**algebra**

the picture will be hung on a wall where the distance from the floor to ceiling is 8 feet. The center of the picure must be 5 1/4 feet from the floor. Determine the distance from the ceiling to the top of the picture frame.
*January 16, 2015*

**Math**

Miguel is 5 feet 10 inches tall. On a sunny day he casts a shadow 4 feet 2 inches long. At the same time, a nearby electric tower casts a shadow 8 feet 9 inches long. How tall is the tower? How do I set this up into ratios to figure out the tower height?
*January 16, 2015*

**Math**

A blue rope is three times as long as a red rope. A green rope is 5 times as long as the blue rope. If the total length lf the three ropes is 508.26 meters, what is the length of the blue rope?
*January 16, 2015*

**math(5th grade)**

Pls help me
*January 16, 2015*

**physics**

A person is standing on and facing the front of a stationary skateboard while holding a construction brick. The mass of the person is 89.0 kg, the mass of the skateboard is 4.10 kg, and the mass of the brick is 2.50 kg. If the person throws the brick forward (in the direction ...
*January 15, 2015*

**Biology**

You need to prepare a 0.25 M solution of NaCl but you only need 50 ml of this solution. How many grams of NaCl would you need?
*January 15, 2015*

**Biology**

How many grams of glucose are needed to make 500ml of a 3.0M solution of glucose?
*January 15, 2015*

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