Monday

September 26, 2016
Total # Posts: 1,256

**Math 117**

it is suppose to lok like 4-z over z-2 minus 8z-5 over 2-z equals sorry not really sure how to right mayh problems out using differnt symbols

*March 27, 2011*

**Chemistry**

Mr. Bob, I got 0.038119 and it's wrong.

*March 22, 2011*

**Chemistry**

A sample of 6.41 grams of NaOH is dissolved into 675 mL of aqueous 0.250 M NaOH (assume no volume change). This solution is then poured into 2.28 gallons of water. (You may assume that the two volumes can be added.) What is the concentration of NaOH in the final solution? ...

*March 22, 2011*

**physics**

first you need to determine the volume of the balloon and the internal pressures. Using those you can use archimedes principle to figure out how much water is displaced and therefore the bouyant force. Then you must determine how much the water pressure will cause the balloon ...

*March 18, 2011*

**art**

how is the best way to create a celtic artefact from an everyday object

*March 2, 2011*

**math 117**

simplify by factoring sqrt1575to the 4th sorry not sure how to type it out right

*February 26, 2011*

**math 117**

sorry it suppose to say sqrt18 +sqrt 32=

*February 26, 2011*

**math 117**

help solve ã18+ã32=

*February 26, 2011*

**Physics**

The rain-soaked shoes of a person may explode if ground current from nearby lightning vaporizes the water. The sudden converse of water to water vapor causes a dramatic expansion that can rip apart shoes. Water has density 1000 kg/m^3 and requires 2256 kJ/kg to be vaporized. ...

*February 24, 2011*

**math**

graphing with out an equasion...y=-x

*February 22, 2011*

**Algebra**

Alycia's pggy bank has dimes and quarters in it. The numbers of dimes is four less than three times the number of quarters. If the total value of the coins is $7.85, how many dimes are in the piggy bank?

*February 17, 2011*

**calculus**

You work for the silver there is a home with a driveway 2 miles long extending to the house from a nearby highway. the nearest connection box is along the highway but 5 miles from the driveway. it costs the company $100 per mile to install cable along the highway and $140 per ...

*February 15, 2011*

**math**

Stacy multiplied 5x9 and said the answer was 44. What two patterns could you use to show that her answer is not correct? ...

*February 14, 2011*

**Physics II**

When an electron moves from A to B along an electric field line, the electric field does 3.94 x 10^-19 J of work on it. What are the electric potential differences (a) Vb - Va, (b) Vc - Va, and (c) Vc - Vb?

*February 13, 2011*

**College Physics**

A point charge of 1.8 uC is at the center of a Gaussian cube 55 cm on edge. What is the net electric flux through the surface? I have no idea where to start with this problem.

*February 6, 2011*

**Physics II w/ Calculus**

A point charge of 1.8 uC is at the center of a Gaussian cube 55 cm on edge. What is the net electric flux through the surface? I have no idea where to start with this problem.

*February 5, 2011*

**Physics**

A bullet with a mass of mb= 0.05 kg is speeding toward a block of mass m= 10kg. The bullet is moving at vb= 200m/s and the block is at rest. the bullet collides with he block and knocks the block over the edge. the edge is a height h= 0.5m above ground. how far from he edge ...

*February 3, 2011*

**Physics**

two cars, one with mass m1=1000kg and the other with mass m2= 4000kg crash in an intersection. Before the crash, car m1 was headed east with a speed of v1i= 25 m/s and the car m2 was headed north with a speed of v2i= 10m/s. After the crash, the cars stick together. what is the...

*February 3, 2011*

**Physics**

An athlete swims the length of a 46.0 m pool in 21.0 s and makes the return trip to the starting position in 23.0 s. Determine her average velocities in each of the following below. (Take Δx to be positive when the displacement is in the direction she swims during the ...

*February 2, 2011*

**Math**

An executive in an engineering firm earns a monthly salary plus a Christmas bonus of 5300 dollars. If she earns a total of 98700 dollars per year, what is her monthly salary in dollars?

*February 1, 2011*

**Spanish-7th grade-Thanks for checking**

Thank you-I knew when I relooked-Two verbs were conjugated in each of the other three and only the first one should have been: example hago was conjugated but not escribo-not both at the same time Thanks again

*February 1, 2011*

**Spanish-7th grade**

Thanks-I knew the translation-I just wasn't sure which to pick but I figured it out-I know which three of them are wrong, now. Thanks

*February 1, 2011*

**Spanish-7th grade**

How do I answer this question? ¿Qué haces los lunes a las diez de la mañana? Hago estudio. Hago escribo Escucho a la maestra. Hago miro la televisión.

*February 1, 2011*

**geometry**

2 regular hexagonal prisms are similar. The areas of their bases are 25 and 18. The height of th larger prism is 10. What is the volume of the smaller prism?

*January 28, 2011*

**algebra**

The force of gravity is inversely proportional to the square of the center of the earth. if you weigh 120 lbs on the surface of the earth, how much would you weigh 250 miles above the surface? (Earth's radius = 4000 miles)

*January 27, 2011*

**math**

Rectangle ABCD is 12 inches long and has a perimeter of 54 inches. Rectangle LMNO is similar to rectangle ABCD and is 2.4 feet long. What is the width of the rectangle LMNO?

*January 27, 2011*

**physics**

A bb player crouches lowering center of gravity 0.3m. when he jumps, center of gravity reaches 0.9m above normal. A. Calculate velocity when feet left ground. B. Calculate acceleration produced to achieve velocity. C. What force exerted on floor if mass is 110 kg?

*January 24, 2011*

**College Physics II**

Identical isolated conducting spheres 1 and 2 have equal charges and are separated by a distance that is large compared with their diameters. The electrostatic force acting on sphere 2 due to sphere 1 is F. Suppose now that a third identical sphere 3, having an insulating ...

*January 23, 2011*

**English**

Describe the strategies you have developed to avoid confusing the use of adverbs and adjectives in the future.

*January 6, 2011*

**English**

I need help writing a paragraph with five details that are good and five about how to well. Using the words well and good. Example: I like how well the examples are used in our text. It makes me feel better knowing that I am doing better in my homework assignments. The way ...

*January 6, 2011*

**English**

Students are often confused about the use of the words good and well in their writing. Write a 100-word to describe five details from her book that are good and five details about the book that are written well.

*January 6, 2011*

**space**

what is the difference between the atmosphere on earth and venus

*January 3, 2011*

**Algebra**

Samuel's bank has dimes and quarters in it. The number of dimes is four less than three times the number of quarters. If the total value of the coins is $7.85, how many dimes are in the piggy bank?

*December 14, 2010*

**Algebra**

The side of a square equals the length of a rectangle. The width of the rectangle is 4 meters longer than its length. The sum of the areas of the square and the rectangle is 48 square centimeters. Find the side of the square

*December 6, 2010*

**physics**

A 10 g particle undergoes Simple Harmonic Motion with an amplitude of 2.0 mm, a maximum acceleration of magnitude 8.0 X 10^3 m/s^2, and an unknown phase constant, theta. What are a.) the period of the motion, b.) the maximum speed of the particle, and c.) the total mechanical ...

*November 30, 2010*

**hum 205**

need help w the human experience assignment

*November 21, 2010*

**chemistry**

pv/rt=n

*November 19, 2010*

**statistics**

Suppose that a department contains 8 men and 20 women. How many ways are there to form a committee with 6 members if it must have strictly more women than men?

*November 8, 2010*

**1st grade**

I just finished watching 'X-Men: Days of Future Past." LMAO.

*November 8, 2010*

**Physics**

So far i got angular velocities at t=2s and t=4s W2 = 3(2)^2-6(2)+4 = 4 rad/s W4 = 3(4)^2-6(4)+4 = 28 rad/s For average angular acceleration i got W2-W1 / T2-T1 = 28-4/4-2 = 12 rad/s^2 But I dont know how to figure out part d and e. Thanks for the help.

*November 7, 2010*

**Physics**

The angular position of a point on the rim of a rotating wheel is given by Theta = 4.0t-3t^2+t^3, where theta is in radians and t is in seconds. At t=0, what are (a.) the point's angular position and (b.) its angular velocity? (c.) What is its angular velocity at t=4.0s? ...

*November 7, 2010*

**ALgebra**

3x-8 > 2x-1 You first need to get x on one side of the inequality.To do so, subtract the -8 over to the right side of the inequality. 3x > 2x+7 Next, subtract the 2x. x > 7 Therefore, when you plug a number that is 7 or greater into the original equation, the left ...

*November 7, 2010*

**Physics**

The angular position of a point on the rim of a rotating wheel is given by Theta = 4.0t-3t^2+t^3, where theta is in radians and t is in seconds. At t=0, what are (a.) the point's angular position and (b.) its angular velocity? (c.) What is its angular velocity at t=4.0s? ...

*November 7, 2010*

**Reading**

For years, people have thought that there might be life on one of the other planets.

*November 3, 2010*

**Reading**

Many people are fascinated by outer space. School children learn about our solar system in school. Tv and radio announcers tell us what to watch for in the night sky. They tell us when the planets are brightest and whcih ones we can see with the naked eye. for years, people ...

*November 3, 2010*

**Physics**

well, I know a.) is 39.2 J using the equation for elastic potential energy (Delta U = 1/2kx^2). But I am having trouble figuring out b and c and don't know what equations to use.

*October 31, 2010*

**Physics**

A block with mass m = 2.00kg is placed against a spring on a frictionless incline with angle (30 degrees). (The block is not attached to the spring.) The spring with spring constant k = 19.6 N/cm, is compressed 20.0 cm and then released. a.) What is the elastic potential ...

*October 31, 2010*

**College Physics**

A block with mass m = 2.00kg is placed against a spring on a frictionless incline with angle (30 degrees). (The block is not attached to the spring.) The spring with spring constant k = 19.6 N/cm, is compressed 20.0 cm and then released. a.) What is the elastic potential ...

*October 31, 2010*

**Math**

A roofing crew can roof a house in 10 hours. If a second crew was added, the job would take 6 hours. How long would it take the second crew to roof the house alone?

*October 20, 2010*

**physics**

An unbanked curve has a radius of curvature of 75m. On a winter day, with snow on the road, the coefficient of static friction between the tires of the car and the road is .23. What is the maximum speed with which the car can safely negotiate the curve?

*October 17, 2010*

**physics**

An unbanked curve has a radius of curvature of 75m. On a winter day, with snow on the road, the coefficient of static friction between the tires of the car and the road is .23. What is the maximum speed with which the car can safely negotiate the curve?"

*October 17, 2010*

**math**

I have 6 tens and less than 5 ones. What number am I?

*October 12, 2010*

**Stats**

There are four major political parties in the country Treon. A public research group is interested in finding out whether there is any relationship between the party that is supported by a citizen of Treon and that citizen's socio-economic status. For the purposes of a ...

*October 9, 2010*

**Stats**

a) IHI insurance is interested in determining whether younger drivers (below the age of 25) are more prone to motor accidents than older drivers (25 or older). A random sample of 70 IHI policyholders below the age of 25 were selected and whether they had been in less than 2 (...

*October 9, 2010*

**Accounting**

What would you pay for a $50,000 debenture bond that matures in 15 years and pays $5,000 a year in interest if you wanted to earn a yield of: (Round computations to 2 decimal places and use the rounded amounts to calculate the final answer. Round the final answer to 2 decimal ...

*September 29, 2010*

**math**

Using the formula of Interest equals principle times interest rate times term or I + P x R x T. Since we do not know the interest rate, using algebra, we get this formula to find out the interest rate: R + I/ P x T. So in your case it would be this: R = $420.00 / $3,500.00 x 1...

*September 23, 2010*

**Calculus**

Evaluate the integral e^x sin4x dx. I know the answer is 1/17 e^x sin4x - 4/17 e^x cos4x + C but I don't know how to solve it out.

*September 23, 2010*

**algebra**

how do I write7,375 in expanded form using power of 10 and exponenets

*September 16, 2010*

**College Physics**

Thanks a bunch!

*September 9, 2010*

**College Physics**

A red car and a green car, identical except for color, move toward each other in adjacent lanes and parallel to an x-axis. At time t=0, the red car is at x sub r = 0 and the green car is at x sub g = 220m. If the red car has a constant velocity of 20km/h, the cars pass each ...

*September 9, 2010*

**Weather & Climate (science)**

all are true

*September 8, 2010*

**Weather & Climate (science)**

1.) I am guessing an aneroid barometer 2.) mercury barometer

*September 8, 2010*

**Weather & Climate (science)**

Sure, what other questions do you have?

*September 8, 2010*

**Weather & Climate (science)**

Barometer

*September 8, 2010*

**Physics**

A red car and a green car, identical except for color, move toward each other in adjacent lanes and parallel to an x-axis. At time t=0, the red car is at x sub r = 0 and the green car is at x sub g = 220m. If the red car has a constant velocity of 20km/h, the cars pass each ...

*September 8, 2010*

**physics**

I have 2 questions: Assuming that water has a density of exactly 1 g/cm3, find the mass of one cubic meter of water in kilograms. Suppose that it takes 10.0 h to drain a container of 5700m3 of water. What is the "mass flow rate," in kilograms per second, of water ...

*September 2, 2010*

**statistics**

I do very much appreciate your help. This guides me to where I need to go.

*August 9, 2010*

**statistics**

Given a sample size of 38, with sample mean 660.3 and sample standard deviation 95.9 we are to perform the following hypothesis test. Null Hypothesis H0: ƒÊ = 700 Alternative Hypothesis H0: ƒÊ ‚ 700 At significance level 0.05 3. Calculate the ...

*August 9, 2010*

**Calc**

Solve the following separable equation. y'=(4x^3-1)/y for y(1)= -3

*July 11, 2010*

**Calc 2**

Solve the following separable equation y'=e^2x/4y^3

*July 9, 2010*

**Calc 2**

Solve the Separable equation y=((sqrt(1-y^2)) x^2

*July 9, 2010*

**Calc 2**

Differential equations. There are gophers in a very large vacant lot. The original population is 30 Gophers. After 2 months there are 38. When will there be 45 gophers? round answer to nearest tenth of a month

*July 9, 2010*

**Calc 2 college**

Thanks

*July 9, 2010*

**Calc II**

x^3/(sqrt x^2+25) dx

*June 26, 2010*

**Calc II**

Integrate 3/(Sqrt x^2-16) dx

*June 26, 2010*

**Calc II**

Find the area of the region between y = x sin x and y = x for 0 ≤ x ≤ pi divided by 2

*June 25, 2010*

**Calculus II**

Find the area of the region between y = x sin x and y = x for 0 ≤ x ≤ pi/2

*June 25, 2010*

**Science**

A 44 g piece of ice at 0 degrees celsius is added to a sample of water at 7 degrees celsius. all of the ice melts and the temperature of the water decreases to 0 degrees celsius. How many grams of water were in the sample?

*June 18, 2010*

**algebra**

Ok, so i did the problem right, but just was not sure what to do with them. sorry for the confusion...thanks for the help!

*June 3, 2010*

**algebra**

because if I use what you gave me would it be (x-3)(x+1) and then what would i do?

*June 3, 2010*

**algebra**

Ok I think I am even more confused: its 3 feet^2 So is it x^2-2x-9=0

*June 3, 2010*

**algebra**

The width of a rectangle is 2 feet less that the length. The area is 3 feet^2. Find the length and width.

*June 3, 2010*

**Math**

(1+ square root of 5)(square root of 3-square root of 5)

*May 5, 2010*

**Math**

(1+ square root of 5)(square root of 3-square root of 5)

*May 5, 2010*

**Math**

2 square root 3(square root of 7- square root of 3)

*May 5, 2010*

**Math-Reiny**

I posted this problem earlier and you answered it for me. The teacher said the correct answer is 3+2y/7-4y. How is that the answer. Below is what you did earlier 3/(y+2) / (7/y-4)) = 3/(y+2) * (y-4)/7 = (3y-12)/(7y+14) or 3(y-4)/[7(y+2)]

*May 3, 2010*

**Math **

3/y+2 over 7/y-4 can u please show me the steps on how you got the answer. Thank You

*May 3, 2010*

**Math**

3/y+2 over 7/y-4 can u please show me the steps on how you got the answer. Thank You

*May 2, 2010*

**math**

Michelle draws a card from a standard deck of 52 cards. She replaces the card and draws a second card. What is the probability that she draws a Heart and then a Spade?

*April 28, 2010*

**Math**

120 Are the last two digits divisible by 4 Are the last three digits divisble by 8 Are the sum of the digits divisible by 9 1048 Are the last three digits divisible by 8

*April 15, 2010*

**Math**

120 Are the last two digits divisible by 4 Are the last three digits divisble by 8 Are the sum of the digits divisible by 9 1048 Are the last three digits divisible by 8

*April 15, 2010*

**math**

Use factoring to solve the equation. (x+6)(x+5)=2

*April 14, 2010*

**Math**

Use factoring to solve each equation. (x+6)(x+5)=2

*April 14, 2010*

**math**

Find the ordered pair using the elimination method. 4x+5y=3 8x+10y=6

*March 21, 2010*

**Algebra**

Well This is what I did to get 40^.5 you know the amount Y and then you already know the function X its Y^x. that's what I just went over today in class

*March 10, 2010*

**Algebra**

wouldn't it just be 40^1/2 that's 6.32 so 6 rounds

*March 10, 2010*

**Math**

Block A & B slide on lubricated surfaces for which friction is .1. knowing that the system is released from rest, determine the velocity of block B after 5 seconds block A is 10 N block B 20N and block B is on a 30 degree incline connected to a at top of the surface

*March 10, 2010*

**physics 101**

A 72.9 kg man is standing on a frictionless ice surface when he throws a 1.6 kg book at 11 m/s.

*March 9, 2010*

**Maath**

Use the elimination method to solve each system. How do you do this? {u+4y=11 7u+3v=2

*February 26, 2010*