Friday

February 12, 2016
Total # Posts: 759

**calculus**

Suppose f is a function of x. 1) find d/dx f^2 2)use the result to find the integral ∫ lnx/xdx. I did 1), and I got 2fdf, but im confused about number 2.
*January 11, 2016*

**Maths**

A Piece Of Cloth Costs Birr 200. If The Piece Was 5m Longer, And The Cost Of Each Metre Of Cloth Was Birr 2 less,the Cost Of The Piece Would Have Remained Unchanged. How Long Is The Piece And What Is Its Orginal Price Per Metre?
*January 6, 2016*

**biology**

what are the main similarties and differences between the three main food groups,carbohydrate,proteins and fats?
*January 1, 2016*

**Maths**

In A Two Digit Number, The Sum Of The Digits Is 14. Twice The Tens Digit Exceeds The Units Digit By One.Find the Numbers.
*December 9, 2015*

**Physics Help**

A dumbbell has a mass m on either end of a rod of length 2a. The center of the dumbbell is a distance r from the center of the Earth, and the dumbbell is aligned radially. If r≫a, the difference in the gravitational force exerted on the two masses by the Earth is ...
*December 7, 2015*

**organic chemistry**

Because alcohol protons are reasonably acidic and easily undergo exchange, it is important that the base be matched to the appropriate solvent. Explain why it would be virtually impossible to sort out the factors the size of the base or the stability of the alkenes formed if a...
*December 3, 2015*

**Physics**

order the acceleration from least to greatest. a) 30<-object ->50 b) 20<-object c) 20<-object->40 d) 10<-object->30 I think the answer is "dcba" but that isn't right
*November 29, 2015*

**math**

An airplane can fly 625 miles with the wind in the same amount of time as it can fly 425 miles against the wind. If the wind speed is 50 mph, find the speed of the plane in still air. (Round your answer to the nearest whole number.)
*November 24, 2015*

**Math**

A ladder of mass M and length L leans against a wall as shown. There is no friction with the wall but there is friction with the ground. What is the maximum distance along the ladder that someone with mass m can climb without the ladder slipping?
*November 23, 2015*

**Math**

How many different arrays can you make with a total of 6counters?
*November 5, 2015*

**Physics**

A knight sits on a castle wall during a siege.To while away the time, he notes that boulders catapulted from below land on the top of his wall with a vertical velocity of 5.7 m/s. If he is 45 m above the catapult, what is the initial velocity of the boulders? The acceleration ...
*November 4, 2015*

**NEED HELP for homeschool**

Ask the college that you would want to go as to what would be a good alternative to the classes other students are taking in high school.
*November 4, 2015*

**Physics**

The tallest volcano in the solar system is the 29 km tall Martian volcano, Olympus Mons. An astronaut drops a ball off the rim of the crater and that the free fall acceleration of the ball remains constant throughout the ball’s 29 km fall at a value of 4.4 m/s 2. (We ...
*November 4, 2015*

**math**

C PPPPPPPPPPPP C PPPPPPPPPPPP C PPPPPPPPPPPP C PPPPPPPPPPPP This could be a diagram.
*November 4, 2015*

**ALGEBRA**

CHLOR PURCHASED A BOTTLE OF PERFUME FOR $1.60 PER 0.01 ONUNCE. WHAT IS THE UNIT C0ST OF THE PERFUME 1.60 DIVIDED BY 0.01=
*November 3, 2015*

**Pre calculus**

A plane is headed due south with an airspeed of 190 mph. A wind from the direction of S 40 degrees W is blowing at 30 mph. Find the groundspeed of the plane, rounded to the nearest whole number
*October 30, 2015*

**Physics**

A person 1.90 m tall walks on a horizontal icy surface. The coefficient of friction between the surface of the ice and the person's shoe sole is μ = 0.33 and the length of the person's legs are 1/2 of the person's height. Determine the maximum step length the ...
*October 4, 2015*

**Physics**

A person 1.90 m tall walks on a horizontal icy surface. The coefficient of friction between the surface of the ice and the person's shoe sole is μ = 0.33 and the length of the person's legs are 1/2 of the person's height. Determine the maximum step length the ...
*October 3, 2015*

**Physics**

A bullet shot horizontally strikes the ground with a velocity of 150.0km/h (10 degrees below the horizontal), determine the height from which it was fired.
*October 1, 2015*

**Physics**

If a ball is thrown at an initial speed of 8.0m/s at an angle of 35 degrees above the ground, what is the speed of the ball when it returns to its original height?
*September 13, 2015*

**Algebra**

3w-8d. Just distribute the negative sign without more information that is the only thing you can do.
*September 9, 2015*

**Pre-Calc**

Look up the unit circle online and it will help you. Go to google and you type calculus unit circle. The answer provided was correct. But make sure it's just (1/2,-sqrt(3)/2) dont have the 2 with the square root.
*September 9, 2015*

**Heat Transfer**

The inside wall of a furnace needs to be designed such that it transmits a maximum heat flux of 600 W/m2 . The inside wall temperature will be 1100°C and the outside temperature will be 150°C. We have two different types of bricks from which we can make the wall: Type...
*September 9, 2015*

**math**

Imagine if you have hot(+) bricks. If you add 2 hot bricks with 2 other hot bricks, you will have 4 hotness in total. Now let's say you have some cold(-) bricks. If you have the 4 hot bricks and add the two cold ones 4 + (-2) = 2 The cold bricks substrated from the overall...
*September 9, 2015*

**Math**

dumb butt
*August 26, 2015*

**math**

ur dumb
*August 26, 2015*

**ss**

HELP PLEASE
*August 24, 2015*

**ss**

Multiple Choice 1. What is the main advantage of using money instead of bartering? (1 point) Many more people today use money than bartering to get goods and services. Not all countries use the same types of money in their economies. Money comes in many ...
*August 24, 2015*

**physics**

A, DUE NORTH from start position B, 90 degrees East C, 37 degrees south east
*August 14, 2015*

**physics**

A football player runs the pattern given in the drawing by the three displacement vectors , , and . The magnitudes of these vectors are A = 4.00 m, B = 15.0 m, and C = 18.0 m. Using the component method, find the (a) magnitude and (b)direction of the resultant vector + + . ...
*August 14, 2015*

**Math Functions**

Write two equations to represent the same exponential function with a y-intercept of 5 and an asymptote at y=3 . Investigate whether other exponential functions have the same properties. Use the transformations to explain your observations.
*July 26, 2015*

**english**

A prepositional phrase modifies a word and relates that word to the preposition's _____.
*June 18, 2015*

**Chemistry**

What intermolecular forces are present in CSH2??
*June 13, 2015*

**math**

a cylindrical container has a diameter of 14cm and a height of 20cm and is full of water. The water is poured into another cylinder which has a diameter of 20cm. How deep is the water in the second cylinder?
*June 6, 2015*

**Math**

Prime factorize the following using factor tree method: 66, 99, 20, 108, 37 and 450
*June 4, 2015*

**Algebra 2 **

- Simplify: x^2+6x+8/x^2-2x-8 . Identify any excluded values - Simplify : x^2-36/x^2+6x * x^3+4x^2/x^2-4x-12
*May 28, 2015*

**english**

can i get a quiz check Question 1.1. Choose the sentence that is punctuated correctly. (Points : 1) =====-> Many people are afraid of bold futuristic inventions Why did you spend all your money on expensive trendy clothes that you'll only wear a month or so? Oh, no, Mom...
*May 27, 2015*

**math**

which fraction is between 0 and 2/4 !!!!!!!!!!!
*May 20, 2015*

**Algebra 1**

A teacher graded the tests for each of her students. She calculated a mean grade of 80 and a standard deviation of 3. One of her students, Katrina, had a z-score of 2. What grade did Katrina get on the test?
*May 10, 2015*

**Chemisrty**

To what volume must 1.0 l of a 6.0 m solution of hcl be diluted in order to prepare a 0.2 m solution? I just need to find wht steps i need to take to get the answer
*April 27, 2015*

**math**

local students were surveyed about adding stoplights at the corner of Main Street and Perry Avenue. Determine whether each survey question may be biased. Explain A) are stoplights needed at the intersection of Main and Perry? B) should stoplights be installed at the corner of ...
*April 20, 2015*

**physics**

Calculate the range of the projectile using the initial speed and angle. Use g = 9.8m/s your calculation. Initial speed is 18m/s Angle is 75 Help please !!
*April 13, 2015*

**Spanish**

What is UOLSRRSEDELO unscrambled? The word is a spanish word and is written as: _ _ _(space) _ _ _ _ _ _ _ _ _ Thanks!
*March 25, 2015*

**Physics**

There 46.5J of elastic potential energy stored in a spring. How far is the spring stretched if the spring constant is 455N/m
*March 24, 2015*

**l.a**

yes
*March 12, 2015*

**l.a**

put the worlds in order trellis,treasure,trestle,treason,treble
*March 12, 2015*

**Math**

find the area in the first quadrant bounded above by y=sinx, below by the x-axis, and to the right by x=pi/2 is divided into two equal parts by the line x=a. Find a.
*March 1, 2015*

**Math**

Find the volume of the solid generated by rotating the area bounded by y=x^2 and x=y^2 about the x-axis.
*March 1, 2015*

**Physics**

A Gun of Mass 3.5kg fires a bullet at 320m/s. If the gun recoils with a speed of 24m/s, calculate the mass of the bullet.
*February 16, 2015*

**Chemistry**

(a) What type of ion chromatography (cation or anion) will you use to separate the following ions: Cu2+, Fe3+, Ag+ and Na+ . I'm having trouble here as I know that in elution chromatography they use like charges to separate ions, but is that the same case in ion-exchange...
*February 2, 2015*

**Chemistry**

A chemical bond is formed when electrons are?
*January 29, 2015*

**Chemistry (Chromatography)**

Comment on the order of elution of the following solutes in (a) normal-phase and (b) reversed-phase liquid chromatography. Give reasons for the difference. Solute X nonpolar Solute Y polar, a dipole Solute Z polar, more polar than Solute Y
*January 24, 2015*

**ART check answers please**

Ok thank you! Yea 7 is a bad question in my opinion! 2 is c?? 6 is a??
*January 24, 2015*

**ART check answers please**

1. A museum professional has been working extended hours to remove dirt and grease that a vandal left on a painting. This professional is most likely an a)curator b)conservationist*********** c)historian d)archaeologist 2. Pick the statement that best describes why the museum...
*January 24, 2015*

**math**

Jeremy says that the absolute value of 6 is -6.is he correct?explain
*January 19, 2015*

**math**

14000
*January 10, 2015*

**physics**

Now how far the will the ball in the problem below will hit the ground? a. 10m b. 6.4m c. 9.6m d. 20m e. 140m a ball rolls off the table top 2m tall. with a velocity of 10m/s. with what speed will it strike the ground? V^2 = Vo^2 + 2g*h V^2=0^2+2*9.8*2 V^2=39.2^2 v=6.3m/s
*January 4, 2015*

**physics**

a ball rolls off the table top 2m tall. with a velocity of 10m/s. with what speed will it strike the ground? A. 10m/s B. 6.3m/s C. 16.3m/s D. 11.8m/s E. 139m/s
*January 4, 2015*

**physics**

An acceptable unit for power would be A. kg-m/s B. kg-m-m/s/s/s C. N/s D. Kg-m-m/s/s E. J-s
*January 4, 2015*

**physics**

a wooden block of mass equal to 15kg is pressed against a spring. The spring has constant of 225N/m. If the spring is compressed 0.15m, how fast will the block travel when released?
*January 4, 2015*

**physics**

a toy car rolls horizontally on to a ramp that has a total height of 0.8m. what minimum velocity will allow the car to reach the top of the ramp/
*January 3, 2015*

**english **

Last night, Jason introduced me to a friend of his. Whose hair was all the way down to the back of his knees in a single dreadlock.
*January 2, 2015*

**math**

Nothing.
*December 18, 2014*

**Math**

A fence is to be built to enclose a rectangular area of 310 square feet. The fence along three sides is to be made of material that costs 3 dollars per foot, and the material for the fourth side costs 14 dollars per foot. Find the dimensions of the enclosure that is most ...
*December 11, 2014*

**Math-Calculus**

Thank you very much Reiny for this wonderful explanation. I am not the brightest bulb and yes 2 hours to be precise.
*December 11, 2014*

**Math-Calculus**

Find the point on the line -2x + 4y + 3 =0 which is closest to the point (-2,1). Note: I have been struggling on this for hours!
*December 11, 2014*

**Physics**

A dart gun is aimed horizontally at the center of a large target 150 m away. The initial velocity of the dart is 450 m/s. (Ignore air resistance) a) Where does the dart strike the target (relative to the center of the target)? b) To hit the center of the target the dart must ...
*December 6, 2014*

**chemistry**

a mixture of 39.8g containing potassium chloride and potassium trioxochlorate (v) upon heating, the residue weighed 28.7g what is the percentage mass of potassium chloride in the residue?
*November 21, 2014*

**math**

2.joe was making mixed nuts.he used 2 1/4 pounds of pecans and 3 1/5 pounds of cashews.how many pounds of mixed nuts did joe make? A.5 17/40 B.5 2/9 C.5 1/2 D.5 9/20
*November 20, 2014*

**art**

im sure its c
*November 20, 2014*

**science**

how do i find the percent. then lable it on a smaller diagram
*November 12, 2014*

**College physics**

In this problem you will estimate the heat lost by a typical house, assuming that the temperature inside is T(in) = 20 degrees celcius and the temperature outside is T(out) = 0 degrees celcius. The walls have fiberglass insulation, which dominates the heat conduction ...
*November 6, 2014*

**science**

Over time,a plant pollinated by a hummingbird has developed very long, tube like flowers.Why might the flower have adapted in this way?
*October 30, 2014*

**Math**

I did this test, the answer is c: 5 buns and 3 patties :)
*October 29, 2014*

**8th grade English/Language Arts**

What are all the Answers?
*October 28, 2014*

**Language Arts**

Crip Your Pointing to your name meaning your Wrong :D
*October 23, 2014*

**Anatomy and Physiology**

Im gonna go ahead and answer this myself and say that I have no idea and I am most likely going to fail this assignment
*October 19, 2014*

**Anatomy and Physiology**

There are many disease, disorders, syndromes that attack the muscular system such as muscular dystrophy, hypotonia, polio, etc. Because of our research facilities and advanced medical care in the United States, many of the people in our country who are victims of these ...
*October 19, 2014*

**Physics**

Two forces parallel to the x axis do 17.2 J of work on a small tray while moving it 19.0 m in the x direction across a gym floor. One of the forces has a value of +3.93 N in the x direction. What is the other force?
*October 14, 2014*

**Chemistry**

if all the macro-molecules are made mainly of the elements CHO, how are they different?
*October 8, 2014*

**Algebra**

The length of a rectangle is 11 cm more than the width. The perimeter is 90 cm. Find the length and width of the rectangle.
*September 7, 2014*

**statistics**

59.9
*July 27, 2014*

**Mathematics**

The minute-hand of a clock is 6cm long. How far does the end of the hand travel in 35m?
*July 5, 2014*

**physical science**

A 0.200 kg ball sits on a shelf 2.00 meters from the floor and then falls to a point 1.00 meter from the floor ignoring any affects due to fiction at this position_______
*May 30, 2014*

**Math**

You should reduce 26/56 to 13/28 yeah lol I agree
*May 28, 2014*

**Physics quick help please**

6. If 4.0 × 1018 J of work done on a point charge changes its electric potential difference by 25.0 V, then what is the magnitude of the charge? (Points : 1) 1.6 × 101^9 C 4.0 × 101^9 C 1.6 × 101^8 C 4.0 × 101^8 C 7. Two parallel plates have an ...
*May 1, 2014*

**business**

Research studies indicate that the referral approach is effective because: A. customers seldom trust a salesperson, but do trust a third party. B. customers may be far more impressed with your good points if they are represented by a third party, rather than by you. C. ...
*April 30, 2014*

**Probability**

a) y/(1+mu) b) 1+mu c) (y+1)/(1+mu)
*April 3, 2014*

**probability**

2) Part a
*April 3, 2014*

**Algebra **

What is a quartic function with only the two real zeros given? x = -4 and x = -1 A. y = x^4 + 5x^3 + 5x^2 + 5x + 4 B. y = x^4 - 5x^3 - 5x^2 - 5x - 4 C. y = -x^4 + 5x^3 + 5x^2 + 5x + 4 D. y = x^4 + 5x^3 + 5x^2 + 5x - 5
*March 24, 2014*

**Math**

Im think E
*March 14, 2014*

**Math**

Each of the following is equivalent to 75% of 60 EXCEPT A. 0.75 × 60 B. 0.6 × 75 C. 60 × 15 20 D. 75 × 6 100 E. 60 × 3 4
*March 14, 2014*

**Math**

The velocity (feet per second) of an object is given by the equation v = 3(2t + 1)0.4. What is the equation for the acceleration of the object? What is the equation for the displacement of the object? The displacement is initially 25 feet. What are the values of the ...
*March 12, 2014*

**Chemistry**

What are the typical ppm values of hard water and an unknown water sample and how do their titrations compare?
*March 12, 2014*

**math**

The voltage (in volts) induced in a coil of wire is v = (2t + 1)^0.5. The current in the coil is initially 0.3 amps, and the inductance is 5H. What is the equation for the current in the coil?
*March 11, 2014*

**math**

the temperature has been dropping 3 degrees per hour. at midnight the temperature was 25 degrees. let y be the temperature after x hours
*February 24, 2014*

**Math**

Stacy Multiplied 5 * 9 and said the answer was 44. What 2 patterns could you use to show that her answer is not correct?
*February 24, 2014*

**Physics**

A golfer, standing on a fairway, hits a shot to a green that is elevated 5.50 m above the point where she is standing. If the ball leaves her club with a velocity of 46.0 m/s at an angle 0f 35.0º above the ground, find the time that the ball is in the air before it hits ...
*February 17, 2014*