Wednesday

October 26, 2016
Total # Posts: 966

**Linear Algebra**

1. Considering 2 planes with equations: x + 2y - 3z = 1 x + 2y - 3z = 18 (a) Given (a,b,c) a point on the first plane, find the point where the line perpendicular to both planes passes by (a,b,c) and through the 2nd plane.

*October 10, 2012*

**Physics - repost**

A pendulum consists of a small object hanging from the ceiling at the end of a string of negligible mass. The string has a length of 0.88 m. With the string hanging vertically, the object is given an initial velocity of 1.7 m/s parallel to the ground and swings upward on a ...

*October 9, 2012*

**Physics - repost**

A satellite has a mass of 5381 kg and is in a circular orbit 4.30 105 m above the surface of a planet. The period of the orbit is 2.06 hours. The radius of the planet is 4.09 106 m. What would be the true weight of the satellite if it were at rest on the planet's surface?

*October 9, 2012*

**Physics**

A pendulum consists of a small object hanging from the ceiling at the end of a string of negligible mass. The string has a length of 0.88 m. With the string hanging vertically, the object is given an initial velocity of 1.7 m/s parallel to the ground and swings upward on a ...

*October 9, 2012*

**Physics**

A satellite has a mass of 5381 kg and is in a circular orbit 4.30 105 m above the surface of a planet. The period of the orbit is 2.06 hours. The radius of the planet is 4.09 106 m. What would be the true weight of the satellite if it were at rest on the planet's surface?

*October 9, 2012*

**physics**

A motorcycle has a constant speed of 20.8 m/s as it passes over the top of a hill whose radius of curvature is 159 m. The mass of the motorcycle and driver is 387 kg. Find the magnitude of (a) the centripetal force and (b) the normal force that acts on the cycle.

*October 9, 2012*

**physics**

On a banked race track, the smallest circular path on which cars can move has a radius of 105 m, while the largest has a radius of 175 m, as the drawing illustrates. The height of the outer wall is 18.7 m. Find (a) the smallest and (b) the largest speed at which cars can move ...

*October 9, 2012*

**math**

How much simple intrest would 1,000 earn in 275 days at an intrest rate of 4.21 percent?

*October 4, 2012*

**physics**

1. A man walks 10km east and 20km south the displacement of the man from initial position 2. In figure below R= 30, find x and Y respectively.

*September 22, 2012*

**social studies**

Ranchos callampas and favelas are all slum areas in

*September 19, 2012*

**Statistics**

A survey of 815 students is asked whether or not they have cable TV and Internet cable in their rooms at home. Results of the survey showed that 69% of students has cable TV, 58% of students has Internet cable and 37% of students has both cable TV and Internet cable. Suppose, ...

*September 18, 2012*

**Statistics**

Wendy is a randomly chosen member of a large female population, in which 9% are pregnant. Wendy tests positive in a pregnancy test. Pregnancy test correctly identifies pregnancy 95% of the time and correctly identifies non pregnancy 92% of the time. What is the probability ...

*September 18, 2012*

**Math**

The following three points are produced by some quadratic function of the form : f(x) = Ax^2 + Bx + C where A; B and C are real numbers and A = 0; they are (1/2,0);(0,10); and (4,0). Find a quadratic function that satisfy es these three points.

*September 18, 2012*

**health**

I got alpha

*September 18, 2012*

**Math **

Suppose an isosceles triangle has perimeter 10 cm. Find an expression for its area A as a function of the length of its base b (assume that the other two sides are the sides of equal length). What is the domain of A?

*September 18, 2012*

**Physics**

An airplane travels at 880 how long does it take to travel 1.50km

*September 17, 2012*

**Chemistry **

Four ice cubes at exactly 0 Celsius having a total mass of 55.0g are combined with 120g of water at 77 Celsius in an insulated container. If no heat is lost to the surroundings, what will be the final temperature of the mixture?

*September 10, 2012*

**healthh**

i found 6 weeks

*September 8, 2012*

**math (immediate help please)**

how many different four digit numbers can be obtained by using all four of these digits 5,1,1,5? show work please

*September 6, 2012*

**algebra**

how many different four digit numbers can be obtained by using all four of these digits 5,1,1,5 show work please

*September 6, 2012*

**Math**

At a large nursery, a border for a rectangular garden is being built. Designers want the border's length to be 5 ft greater than it's width. A maximum of 180 ft of fencing is available for the border. Write and solve an inequality that describes possible widths of the ...

*August 30, 2012*

**nervous system**

Blood

*August 26, 2012*

**math**

Everyday im hustlin ms sue sucks

*August 22, 2012*

**math**

Oh I got it never mind thanks Ms.Sue!

*August 22, 2012*

**math**

If you don't want to tell me I understand thanks anyway 2 detentions for me then :'(

*August 22, 2012*

**math**

I don't k ow how and I have a huge report to do so I need the answer please

*August 22, 2012*

**math**

What's the quickest way for an ant to go from the ground to the tree trunk?

*August 22, 2012*

**Math**

The left side can be -3 or 3 since the absolute value of -3 is 3. Therefore this can be split in to 2 equations: x^2-3x+3=3 Which simplifies to, x^2-3x=0 and, x^2-3x+3=-3 Which simplifies to, x^2-3x+6=0 Try to solve these and check the discriminant to find the possible solutions.

*August 17, 2012*

**physics**

A 2.0-kg object moving with a velocity of 5.0 m/s in the positive x direction strikes and sticks to a 3.0-kg object moving with a speed of 2.0 m/s in the same direction. How much kinetic energy is lost in this collision?

*August 13, 2012*

**Science**

How about if they are a good runner?

*August 13, 2012*

**Science**

Would "boy" consider a trait?

*August 13, 2012*

**physics**

A 1.5-kg playground ball is moving with a velocity of 3.0 m/s directed 30 ° below thehorizontal just before it strikes a horizontal surface. The ball leaves this surface 0.50 slater with a velocity of 2.0 m/s directed 60 ° above the horizontal. What is themagnitude of ...

*August 12, 2012*

**physics**

An orbiting spacecraft is described not as a "zero-g" but rather as a "microgravity" environment for its occupants and for onboard experiments. Astronauts experience slight lurches due to the motions of equipment and other astronauts and due to venting of ...

*August 10, 2012*

**health**

I got blaming

*August 4, 2012*

**English- directions**

Ok thanks! And yes the last word is mind probes.

*August 4, 2012*

**English- directions **

Can you rephrase the directions in a way that I can tell what it means because I don't really understand the directions its telling me to do: In a short paragraph, explain as throughly as possible the significance of the word or phrase. The Big Shake Eden Mindphrobes.

*August 4, 2012*

**health!**

I got distorting

*August 3, 2012*

**health**

I got energy correct on mine

*July 28, 2012*

**physical science**

a magnet connot be made by

*July 16, 2012*

**English**

Joe's speech was incoherent. He made up words and talked so fast that no one could understand him. Incoherent means: a. hard to understand b. fluent c. illiterate d. stuttering I can't decide between A , C, or D

*July 14, 2012*

**computer science**

Using the Crow’s Foot notation, create an ERD that can be implemented for a medical clinic, using the following business rules: A patient can make many appointments with one or more doctors in the clinic, and a doctor can accept appointments with many patients. ...

*June 27, 2012*

**Pre algebra**

Tasha has a savings account which earn 8% interest. If she has $1400 in her account, how much interest will she earn in one year? I got $112.00 but it doesn't look right.

*June 24, 2012*

**international trade**

2. Consider two countries, Home and Foreign. Assume that Home is labor-abundant while Foreign is land-abundant. Also suppose that there are two industries, wine and cheese, with wine being the more labor-intensive industry. a) Suppose that both wine and cheese industry produce...

*May 24, 2012*

**Math/Prob**

Claire takes a five-question true-false test. She hasn't studied, so she guesses at random. With her ESP she figures she has a 60% probability of getting any one answer wrong. A. What is the probability of getting an answer wrong? (Do you think they want me to ignore the ...

*May 23, 2012*

**physics **

a go cart starts at rest and accelerates to 40 m/s in 200m what is the acceleration of the cyclist?

*May 23, 2012*

**physics**

a go-cart starts and accelerates to 40 m/s in 200m. what is the acceleration of the go-cart?

*May 23, 2012*

**physics **

A cyclist starts at rest and accelerates to a speed of 20 m/s in 5 s. what is the acceleration of the cyclist?

*May 23, 2012*

**physics **

a car travels 50 meters in 1 second. what is the car's velocity?

*May 23, 2012*

**chemistry**

Mass is lost or gains in a.) all chemical reactions b.) all nuclear fission reactions c.) all nuclear fusion reactions d.) all chemical and nuclear reactions my guess is B

*May 20, 2012*

**international trade**

From the economic point of view, India and China are somewhat similar: both are huge, low-wage countries, probably with similar patterns of comparative advantage, which until recently were relatively closed to international trade. China was the first to open up. Now that India...

*May 10, 2012*

**Math**

Thank you!

*May 7, 2012*

**Math**

You run pizza shop and have 8 different toppings that a customer can order. The customer can order any combination of topping including none but they cannot have double of any toppings. How many different pizza combinations can be ordered?

*May 7, 2012*

**Geometry**

A flush tank on a toliet is rectangular with dimensions of 21 in. by 6.5 in. and contains water to a depth of 12 in. How many gallons of water per flush will be saved if the depth of water is reduced by one third? (231 in^3 per gallon.)

*May 4, 2012*

**chemistry**

what concentration of hydroxide ion ust be exceeded in a .01M solution of nickel(II) nitrate in order to precipitate nickel (II) hydroxide?

*May 1, 2012*

**Chemistry**

cacl2

*April 27, 2012*

**math**

A building has 4 stories that are each 15 feet high. A scale drawing has the height of the building at 5 inches. Which of the following is the correct scale?

*April 16, 2012*

**geometry**

I'm not understanding

*April 13, 2012*

**health**

I got C correct on my test

*April 11, 2012*

**algebra 2**

The formula d=1.35ãh models the distance d in miles from the horizon where h is the distance in feet from a personfs eyes to the water. If you are standing in a boat and the distance from the water to your eyes is 8 ft, what is your distance from the horizon...

*March 29, 2012*

**physics**

The force on a wire is a maximum of 6.00\times 10^{ - 2} {\rm{N}} when placed between the pole faces of a magnet. The current flows horizontally to the right and the magnetic field is vertical. The wire is observed to "jump" toward the observer when the current is ...

*March 25, 2012*

**chemistry**

Did you figure out how to answer this?

*March 23, 2012*

**investment**

A bond currently sells for $1,250, which gives it a yield to maturity of 7%. Suppose that if the yield increases by 22 basis points, the price of the bond falls to $1,228. Required: What is the duration of this bond?

*March 15, 2012*

**Physics**

Pilots can be tested for the stresses of flying high-speed jets in a whirling "human centrifuge," which takes 1.8 min to turn through 21 complete revolutions before reaching its final speed. 1. What is the angular acceleration?(rev/min^2) 2. What is the final angular...

*March 5, 2012*

**14**

I got D

*March 4, 2012*

**12**

I got A

*March 4, 2012*

**Math**

4 loaves of bread cit into 10 slices. 18 people eat 2 slices. What is the fraction that shows how much bread was eaten

*March 1, 2012*

**Trig**

Use a calculator to find θ to the nearest tenth of a degree, if 0° < θ < 360° and csc(θ)=1.4307 with θ in QII θ=?

*February 28, 2012*

**Maths**

y=1/x-3 - 4 state the domain and range, at first I though domain would be R (any real number) and range would be R also? I'm not sure

*February 25, 2012*

**Science**

temperature

*February 21, 2012*

**physics**

A 820-{\rm kg} sports car collides into the rear end of a 2700-{\rm kg} SUV stopped at a red light. The bumpers lock, the brakes are locked, and the two cars skid forward 3.0 {\rm m} before stopping. The police officer, estimating the coefficient of kinetic friction between ...

*February 20, 2012*

**physics**

A 820-{\rm kg} sports car collides into the rear end of a 2700-{\rm kg} SUV stopped at a red light. The bumpers lock, the brakes are locked, and the two cars skid forward 3.0 {\rm m} before stopping. The police officer, estimating the coefficient of kinetic friction between ...

*February 20, 2012*

**math**

determine the angular velocity if 11.3 revolutions are completed in 3.9 seconds

*February 19, 2012*

**office procedures**

listen to her and go back to work

*February 15, 2012*

**math**

Mr. spoke earns 800 + 7% of his sales. so we can show this by his total pay- P = 800+ 7%x monthly sales P= 800 + 7%x9200 P= 800 + 644 P= 1,444 Therefor last month Mr.Spoke earnt $1444

*February 12, 2012*

**math**

A girl cycles from her house to a friend’s house at 22 km/h and home again at 26 km/h. If the round trip takes 54 min, how far is it to her friend’s house? Round your answer to the nearest 0.1 km. [

*February 12, 2012*

**MATH**

n a right triangle ABC, C = 90°, A = 41° and c = 67 cm. Find b. (Round your answer to the nearest whole number.) b =

*February 10, 2012*

**Investments**

A firm has current assets that could be sold for their book value of $7 million. The book value of its fixed assets is $57 million, but they could be sold for $99 million today. The firm has total debt with a book value of $32 million but interest rate declines have caused the...

*February 4, 2012*

**Investments**

An analyst gathers the following information about Meyer, Inc.: • Meyer has 1,300 shares of 8% cumulative preferred stock outstanding, with a par value of $240, and liquidation value of $250. • Meyer has 22,400 shares of common stock outstanding, with a par value of...

*February 4, 2012*

**Investments**

An analyst gathers the following information about Meyer, Inc.: • Meyer has 1,300 shares of 8% cumulative preferred stock outstanding, with a par value of $240, and liquidation value of $250. • Meyer has 22,400 shares of common stock outstanding, with a par value of...

*February 3, 2012*

**Investments**

A firm has current assets that could be sold for their book value of $7 million. The book value of its fixed assets is $57 million, but they could be sold for $99 million today. The firm has total debt with a book value of $32 million but interest rate declines have caused the...

*February 3, 2012*

**science**

How much total, KE and PE does a roller coaster have when it has a mass of 750 kg, and is 5m above the ground?

*January 30, 2012*

**math**

(x-1, y+3) apply to all 3 points

*January 25, 2012*

**math**

make a proportion and cross multiply to solve for x (yards/chairs)=(yards/chairs) (6yards/3chairs)=(x yards/ 7 chairs) (6yards x 7 chairs)/(3 chairs)= x (42/3)=x 14=x so 14 yards

*January 25, 2012*

**math**

a=p(1+r)^t a=2,000(1+(1.75/100))^8 don't have a calculator on me

*January 25, 2012*

**Chemisty**

The compound potassium carbonate is a strong electrolyte. Write the reaction when potassium carbonate is put into water

*January 22, 2012*

**Physics **

Under the spreading chestnut tree the village blacksmith dunks a red-hot horseshoe into a large bucket of 22*C water. How much heat was lost by the horseshoe in vaporizing .00100 kg. of water?

*January 22, 2012*

**Physics**

A mouse travels along a straight line; its distance from the origin at any time is given by the equation. x= (8.1 cm * s^-1)t-(2.7cm * s^-2)t^2 A) Find the average velocity of the mouse in the interval from t= 0 to t= 1.0 . value=?; unit= ? B)Find the average velocity of the ...

*January 14, 2012*

**Physics**

i for got to add the "t" A)t=0 to t=10 B)t= 0 to t= 4.0

*January 14, 2012*

**Physics**

A mouse travels along a straight line; its distance from the origin at any time is given by the equation. x= (8.1 cm * s^-1)t-(2.7cm * s^-2)t^2 A) Find the average velocity of the mouse in the interval from = 0 to = 1.0 . value=?; unit= ? B)Find the average velocity of the ...

*January 14, 2012*

**physics**

How does the water pressure .5m below the surface of a small pond compare to the pressure .5m below the surface of a large lake?

*January 10, 2012*

**math**

mode is a number that appears the most... if two numbers repeat the same number of time you write both

*January 10, 2012*

**math**

you made the mistake 2b=h/A

*January 10, 2012*

**Physics**

Problems 7–9 are related to the following scenario: We have a collection of 5 different mass/spring combinations that all have different properties. All of them have some damping and all have the same mass. The properties are summarized in the table below: Name Natural ...

*January 10, 2012*

**math**

27x3=71 each triangle is an equillateral, all sides equal 71/3=27 would be each side length

*January 9, 2012*

**math**

A=P(1+r)^t, A=1200 P=5300 R=7.2/100, now solve for t

*January 9, 2012*

**Pre-Calc-Please check**

1. is correct 2. is correct

*January 9, 2012*

**Physics**

1. If a mass on a spring and a pendulum have the same period on the moon where the gravity is about 1/6 of its value on the Earth, which one will run faster on the Earth? a. The mass on the spring. b. The pendulum. c. They will both run the same. d. It depends on which one has...

*January 9, 2012*

**Chemistry**

If the density of a substance is 15.2 g/mL, what is the density in cg/kl?

*December 31, 2011*

**Math**

convert feet to inches: 10 feet = 120 inches 15 feet = 180 inches get the area of the floor: 120in x 180in= 21,600in^2 divide the area of the floor to the area of the tile: area of the tile is "9in^2" 21600in^2 divided by 9in^2 is 2,400 tiles.

*December 30, 2011*