Monday

April 27, 2015

April 27, 2015

Total # Posts: 1,419

**physics**

A vertical tube with a tap at the base is filled with water, and a tuning fork vibrates over its mouth. As the water level is lowered in the tube, resonance is heard when the water level has dropped 18 cm, and again after 54 cm of distance exists from the water to the top of ...
*March 28, 2012*

**spanish**

yo me
*March 25, 2012*

**spanish**

Yo ______ lavo ______ manos y ______ cara. ______ cepillo ______ dientes y ______ cepillo ______ pelo. Yo ______ pongo ______ ropa.
*March 25, 2012*

**chemistry**

draw amino acid.
*March 24, 2012*

**History**

Explain what does Robert.e.Lee says to his son in letter.
*March 22, 2012*

**History**

Explain what does Robert.e.Lee says to his son in letter.
*March 22, 2012*

**statistics**

Consider a random sample of 37 students, and consider the number who graduate in six years. . Find the probability that 20 students in the sample graduate in six years
*March 20, 2012*

**physics**

A 4.0 kg object is lifted 1.5 m. (a) how much work is done against the earth's gravity ? (b) repeat if the object is lowered insteadof lifted
*March 19, 2012*

**critical thinking test AU**

1. Question : The average height of members of the high school basketball team is six feet, three inches. Jerry is on the high school basketball team, so Jerry must be taller than six feet. The argument above is flawed because it confuses: Student Answer: 4 CORRECT an average ...
*March 12, 2012*

**math**

Please help
*March 5, 2012*

**math**

1- writing to explain- why might you need to measure a perimeter with a measuring tape instead of a ruler? 2- how are a ruler, a yardstick, and a measuring tape the same? how are they different? i don't 1 answer and i try 2 answer please check is it right or not 2) a ruler...
*March 5, 2012*

**math**

2- A ruler a yardstick and a measuring tape are the same because they can measuring items. A rule a yardstick and measuring tape different because they can't measuring the same length. i don't know 1 answer please help me and i want to know number 2 is right or not
*March 5, 2012*

**math**

i don't this answer please help
*March 5, 2012*

**math**

please help
*March 5, 2012*

**math**

1-writing to explain- why might you need to measure a perimeter with a measuring tape instead of a ruler? 2-how are a ruler, a yardstick , and a measuring tape the same? how are they different?
*March 5, 2012*

**3 grade english**

thank you very much
*March 5, 2012*

**math**

my uncle said 85 meter come in answer
*March 4, 2012*

**math**

A park has the shape of a trapezoid. Two of the sides are 25 meters long. The other two sides are 40 meters and 20 meters long. What is the perimeter of the park my answer is 110 meters
*March 4, 2012*

**Maths- Trigonometry**

4. A,B and C are points on a horizontal plane. A is 75 m from C on a bearing of 210 degrees and the bearing of B from C is 120 degrees. The bearing of B from A is 075 degrees. From A the angle of elevation of the top T of a vertical towel at C is 42 degrees. Find a. the ...
*March 3, 2012*

**english**

Ms. Sue help me last night and then i write again something then nobody help me
*March 2, 2012*

**english**

i just wanted to know how did you do # 9 because in the word their no SM word is only wr,kn,st,mb,and gn their no word like SM so please check again and i make (#9 GNASH) i just want to which i did it right or not rest of all correct yes or no
*March 2, 2012*

**english**

i don't #5
*March 2, 2012*

**english**

1-write wrote written 2-knight knob knit 3-listen wrestler whistle 4-thump comp plumber 5-gnaw 6-wreath 7-doorknob 8-plumber 9-knash 10-thimble 11-whistle 12-starled 13-crumb 14-wrinkle 15-knock
*March 2, 2012*

**english**

consonant patterns wr,kn,st,mb,gn directions read each word and idenify the consonant pattern with the silent letter. on the lines,write two more words that have the same silent consonant pattern. underline the consonant pattern in each word you write. 1- write _______ ...
*March 2, 2012*

**math**

a rectangle has a length of 5 yards and a width of 3 yards. what is its perimeter? explain your answer.
*March 2, 2012*

**history**

could you please give me any information about houses in hot dry countries
*March 1, 2012*

**Math**

What is the function rule for 0,31 1,27 2,23 3,19
*February 27, 2012*

**math**

I have no idea
*February 26, 2012*

**physics**

If the coefficient of kinetic friction between tires and dry pavement is 0.800, what is the shortest distance in which an automobile can be stopped by locking the brakes when traveling at 25.7 ?
*February 25, 2012*

**maths**

10 pencils in each packet 46 pencils how many packets are needed
*February 25, 2012*

**ASHFORD**

Identify two distinct fallacies you see committed in the media.
*February 23, 2012*

**Algebra 2**

2^(3x+1)=2^)2/x) I don't know what to do here to get both of the xs
*February 18, 2012*

**chem**

Balance the equation and answer in terms of moles. Chlorine gas can be produced commercially by passing an electric current through a con-centrated solution of sodium chloride (brine). The unbalanced equation is NaCl(aq) + H2O(`) ! NaOH(aq) + Cl2(g) + H2(g) . If the brine ...
*February 15, 2012*

**Math**

Addition But When it's [ (x)^2 ] ^1/2 you can put a negative value under the square in this case besides that you change the powers ex : (-8)^2/3 that means [ (-8)^2 ] ^1/3 and you can write it as [ (-8)^1/3 ] ^2 * for (^1/3) you can put a negative value the answer in both...
*February 15, 2012*

**Math**

+ h^20 Explanation : [(x)^a]^b = (x)^(a)(b) = (x)^ab But Be Careful when it's like [ (x)^(1/2) ] ^2 where (^1/2) is the square root and you can't put a negative value under a square root
*February 15, 2012*

**Calculus**

any constant 1 , 0 , 2 , pi , square root its derivative = 0 so dy/dx x^2+y^2= sqrt(5) 2 x x' + 2 y y' = 0 [x' = 1] 2x + 2yy'=0 ] /2 x + yy' = 0 y' = - x/y
*February 15, 2012*

**Calculus**

1) you find y' (dy/dx) (f'(x)) 2) replace each x by a which equal to one f(x) = (x+1)^1/2 f'(x) = 1/2 (x+1)^-1/2 (1) f'(x) = 1 / 2(x+1) f'(0) = 1/ 2(0+1) = 1/2 = 0.5
*February 14, 2012*

**algebra**

i think you mean x^2 - 7x - 8 = (x-8)(x+1)
*February 12, 2012*

**Calculus (Antiderivatives)**

((x-2)(x+2) / (x-2) ] / (x-2) int x+2 = 1/2 x^2 + 2x + c
*February 10, 2012*

**Calculus**

f'(x) = 6x - 5 / 2 sqrt(3x^2-5x+7) f'(2) = 12 - 5 / 2 sqrt ( 12-10+7) = 7 / 2 sqrt (9) = 7/ 2*3 = 7/6 = 1.16666
*February 10, 2012*

**math**

The plane is at least 500 miles closer to chicago than to denver
*February 10, 2012*

**Mathematics**

It's still really confusing. >o< My type of problems: **8x(squared)/35y(squared)/x(squared)+4x+3/x(squared)-1 **4a(squared)/ab/a(squared)-5a+6/a(squared)-2a **1+1/a / 1-1/a
*February 9, 2012*

**Mathematics**

Can someone explain to me how to solve complex fractions as if I didn't know anything about Algebra? I really need the help, thanks. :) It's not like this is the question of my homework, I just don't understand how to solve complex fractions from the start . . .
*February 9, 2012*

**Calculus**

Find dy/dx for f(x)= (1+x)^(1/x)
*February 8, 2012*

**Calculus**

Find dy/dx for (e^xy)+ x^2 +y^2=10
*February 8, 2012*

**Calculus**

Find the inflection points of f(x)=(x^2-6x-5)e^x
*February 8, 2012*

**Calculus**

Integrate from e^2 to e of tthis funtion: 1/(x)ln(x) dx
*February 8, 2012*

**Calculus**

Find integral of (x^3-6x-20)/(x+5) dx
*February 8, 2012*

**Calculus**

Find the relative extrema of f(x)= x/ln(x)
*February 8, 2012*

**Calculus**

The rate at which iPads are sold is R(t)=1000000x2.8^t where the units of R(t) are millions/year and represents time in years such that the year 2010 (Jan 1 2010 through Dec 31 2010) corresponds to t=0. How many iPads will be sold in the three year period Jan 1, 2012 through ...
*February 8, 2012*

**math**

it takes a skier 30 seconds to ski down the 1st mountain to the second mountain that is 40 feet above ground. it takes the skier 6 seconds per foot to slide down. how many feet above ground is the 1st mountain?
*February 5, 2012*

**statistics**

.096
*February 4, 2012*

**math**

The sum of two numbers is 10.The sum of their squares is 52.Find the numbers.
*February 2, 2012*

**Math**

Find two consecutive positive integers such that the square of the smaller increased by 4 times the larger is 64.
*February 2, 2012*

**french**

can anyone unscramble the letters please.... rtepasn, ipocne, liflmae
*January 30, 2012*

**math problem solving**

Alana has 7 children and brought a $9.95 shirt for each of them. The cashier charged her an additional $13.07 in sales tax. She left the store with $7.28. How much money did Alana start with?
*January 27, 2012*

**maths**

the perimeter of a rectangle is 12 c.m and its length is 4 c.m . what is its width? and the area?
*January 20, 2012*

**maths **

the area of a rectangle is 12 square c.m and its length is 4 c.m what is its width?
*January 20, 2012*

**maths**

what is the area of a rectangle of length 6 c.m and width 3 c.m ? what is its perimeter/
*January 20, 2012*

**maths**

a owns a rectangularers compound of length 40 meters and width 25 meters what is the area of this compound in ares
*January 20, 2012*

**Math**

Evaluate the given indefinite integrals. ∫ (x+2)(2x+3)^1/2
*January 14, 2012*

**math**

I used a program to draw a circle inside a triangle using height = 3 radius and it was fit !
*January 13, 2012*

**math**

Prove that the least height (h) of a triangle contains a circle of radius (r) is h=3r
*January 13, 2012*

**Math**

How do you solve 2(15a-3)=10a-46
*January 11, 2012*

**math**

a * b = 30 .....1 a - b = 7 ..... 2 a = 7 + b ......3 (7+b)(b)=30 b^2+7b-30=0 (using quadratic formula) b = -10 or b = 3 a = -3 or a = 10
*January 10, 2012*

**Thermodynamics**

Determine the units of viscosity,m, in the following equation: t=m(du/dy), where t is a shear stress, u a velocity, and y is a distance in (a) the Engineering English system, and (b) the SI system.
*January 4, 2012*

**UOP**

o test the hypothesis that students who finish an exam first get better grades, Professor Hardtack kept track of the order in which papers were handed in. The first 25 papers showed a mean score of 77.1 with a standard deviation of 19.6, while the last 24 papers handed in ...
*December 19, 2011*

**PHYSICAL SCIENCE PLEASE HELP REALLY APPRECIATE IT!**

ME
*December 14, 2011*

**math**

Hi would you please show how to know if the function is differentiable or not ? please show me the answer with examples
*December 13, 2011*

**math**

Hi I Have A Question About Rolle's Theorem Why We cant solve [ F(x) = abs(x) ] ? *abs = absolute
*December 10, 2011*

**Finance**

A court has ordered Security Enterprises to pay 200000 in two years and 500000 in five years. In order to meet this important liability, they wish to invest in a combination of two-year 10% par-value bonds with annual coupons and five-year zero-coupon bonds. Each of these is ...
*December 4, 2011*

**geometry**

1. a 2. d 3. d 4. b 5. d The final score is 5/5 (100%). I know it is correct because I got them all right. I hope that helps. :)
*December 3, 2011*

**Math**

thanks
*December 1, 2011*

**Math**

Find the equation of the diameter of the circle x^2+y^2-6x+2y=15, which, when produced, passes through the point (8,-2).
*December 1, 2011*

**chemistry**

An analytical chemist determines that an unknown sample contains 0.3452 mol of LiCl. How many atoms of chlorine does this sample contain?
*December 1, 2011*

**maths**

2 over 5 plus 1 over 8 equals blank plus blank equals
*November 30, 2011*

**Maths**

x^3+a^3 Factor= (x-a) what is the remaninder when you divide x^3+a^3 by (x-a)? Please show me your working out
*November 25, 2011*

**physics**

The hero pursues the villain up to the top of a bungee jumping apparatus. The villain appears trapped but to create a diversion she drops a bottle. The hero quickly straps on the bungee cord to his leg and dives straight down to grab the bottle while its still in the air. ...
*November 18, 2011*

**algebra**

Find the x-intecepts, for the graph of the equation: y=x^2+4x-5
*November 9, 2011*

**math**

what is the unit rate for $3 for 4lbs.
*November 8, 2011*

**Math**

Suppose $1.00 amounts to 1.082431 at 8 % compounded quarterly. How much does $200 amount to? (a) $ 126.82 (b) $ 101.46 (c) $ 216.49 (d) $ 380.47 (e) $ 250.00
*November 3, 2011*

**Chemistry**

Ethanol (C2H5OH) is synthesized for industrial use by the following reaction, carried out at very high pressure. C2H4(g) + H2O(g) C2H5OH(l) What is the maximum amount of ethanol (in grams) that can be produced when 1.0 kg of ethylene (C2H4) and 0.014 kg of steam are placed ...
*November 1, 2011*

**math**

Kayla has 5 quarters, 3dimes,2 nickles and 5 pennies. How many different combonations of coins can she make to have 0.50?
*October 27, 2011*

**pre algebra with pizzazz 239**

Idk
*October 27, 2011*

**Physics**

Once a 15 kg crate is in motion on a horizontal ﬂoor, a horizontal force of 51 N keeps the crate moving with a constant velocity. The acceleration of gravity is 9.81 m/s What is µk, the coeﬃcient of kinetic friction, between the crate and the ﬂoor?
*October 25, 2011*

**physics**

In 1976, the Lockhead SR-17A Blackbird set the record speed for any airplane: 3.53x10^3 km/h. suppose you observe this plane ascending at this speed. For 20.0s, it flies at an angloe of 15.0 degrees above the horizontal, then for another 10.0s its angle of acsent is increased ...
*October 25, 2011*

**History Please Please**

thank you very much for your help.
*October 23, 2011*

**History Please Please**

Could you please explain to me: how was the structure (Collosus of Rhodes) effective for it's stated purpose? I don't understand the question and I need something for my project. Pleaseee.
*October 23, 2011*

**Physics**

The Earth's rate of rotation is constantly decreasing, causing the day to increase in duration. In the year 2006 the Earth took about .840 s longer to complete 365 revolutions than it did in the year 1906. What was the average acceleration of the Earth during this time? ...
*October 23, 2011*

**physicsURGENT**

An 85 cm long pendulum with a 0.80 kg bob is released from rest at an initial angle of θ0 with the vertical. At the bottom of the swing, the speed of the bob is 2.8 m/s. What angle does the pendulum make with the vertical when the speed of the bob is 1.4 m/s?
*October 23, 2011*

**math**

A set of 100 open lockers are numbered from 1 - 100. Sarah comes by and closes all the lockers with even numbers. Then Sarah walks past the lockers again and checks the ones numbered with multiples of 3. If the locker is closed, she opens it; if it is open, she closes it. She ...
*October 23, 2011*

**History**

Colossus of Rhodes: Was the structure effective for its' stated purpose?
*October 22, 2011*

**Math**

thank you very much
*October 20, 2011*

**Math**

A computer game starts with a set of 144 tiles separated into 36 equal groups.Sara played the game until there were 8 groups of tiles left.How many tiles were left when Sara finished? How do you get 32 tiles?Can you please explain?Thanks
*October 20, 2011*

**Math**

240 / 6= 40 in both teams. So I don't know how to explain this problem to the teacher because I have to justify my answer. Please help me. Thanks
*October 20, 2011*

**Math**

A computer game starts with a set of 144 tiles separated into 36 equal groups.Sara played the game until there were 8 groups of tiles left.How many tiles were left when Sara finished?
*October 20, 2011*

**math**

I Wanted To Find The Square Root Of (1-2i) But I Didn't Know How To Solve It. My Solution : x+yi = sqr(1-2i) x2-y2+2xyi = 1- 2i x2-y2 = 1 2xy = -2 y = - 1/x x2 - (-1/x) = 1 ] * x2 x4-x2-1 = 0 How To Evaluated (x4-x2-1) ? I Tried To Sol
*October 16, 2011*

**Calculus**

thanks Damon, in HS and this is kicking my butt!
*October 14, 2011*

**Calculus**

equation of tangent line of the function sqrt (3x+5) where x=10
*October 14, 2011*