Wednesday

October 22, 2014

October 22, 2014

Total # Posts: 3,741

**physical science**

calculate the force output by the larger piston of a hydraulic lift when a force of 700 newtons is excerted on the smaller piston and the areas of the two pistons are 20cm and 950cm squared.
*October 21, 2014*

**math**

A golf cart has either 3 or 4 wheels. John checked all 25. How many 3 wheeled how many 4 wheeled
*October 21, 2014*

**physic**

A ball is thrown toward a cliff of height h with a speed of 28m/s and an angle of 60∘ above horizontal. It lands on the edge of the cliff 3.3s later. a) How high is the cliff? i got 26.7 m b) What was the maximum height of the ball? my answer here was 30 m C) What is the...
*October 21, 2014*

**Perimeter and Area**

The set of points (2, 3), (9, 3), (9, 2), and (2, 2) identifies the vertices of a quadrilateral. Which is the most specific description to tell which figure the points form? parallelogram square rectangle trapezoid
*October 21, 2014*

**physic**

Thanks Damon, I realized that I forgot to multiply my velocity by time (3.3). I tried to do the next part but my answer is not right. can you double check this? c) What is the ball's impact speed? I found fall time 3.3-2.47=0.83s then I used this formula V1=V0+gt = 0+9.80*...
*October 21, 2014*

**physic **

A ball is thrown toward a cliff of height h with a speed of 28m/s and an angle of 60∘ above horizontal. It lands on the edge of the cliff 3.3s later. a) How high is the cliff? i got -29.2 m but my answer is wrong b) What was the maximum height of the ball? im not sure ...
*October 21, 2014*

**math**

I labeled a clock, dice, and straight line A,B,C,D and with the chart below them it says to use those points to label and name representations of each of the following table: ray, line, line segment, and angle. Extend segments to show lines and rays. Need help because I'm ...
*October 21, 2014*

**statistics**

Use the z-table to find the requested probabilities. Enter your answers to 4 decimal places. (a) P(z < −1.02) = Incorrect: Your answer is incorrect. (b) P(z ≥ 2.43) = (c) P(−1.80 < z < 1.36) =
*October 20, 2014*

**statistics**

Assume heights and weights are normally distributed with the given means and standard deviations from the table below. Strata Mean Standard Deviation Mean Standard Deviation Height Height Weight Weight (inches) (inches) (pounds) (pounds) U.S. Men 69.3 2.8 191 28 U.S. Women 64....
*October 20, 2014*

**statistics**

The bass in Clear Lake have weights that are normally distributed with a mean of 1.9 pounds and a standard deviation of 0.8 pounds. (a) If you catch 3 random bass from Clear Lake, find the probability that the mean weight is less than 1.0 pound. Round your answer to 4 decimal ...
*October 20, 2014*

**statistics**

Potatoes - Samples: Assume the weights of Farmer Carl's potatoes are normally distributed with a mean of 8.0 ounces and a standard deviation of 1.3 ounces. He bags his potatoes in groups of 6. You buy a bag and the total weight is 42 ounces. Here we determine how lucky or ...
*October 20, 2014*

**AP Chemistry**

What is the change of enthalpy associated with the combustion of one mole of pentane? C5H12 + 8O2 ¨ 5CO2 + 6H2O I'm very confused, Please help!
*October 19, 2014*

**math**

How to solve for t 2465=204.8t+4.6t^2
*October 19, 2014*

**physics**

Traveling at a speed of 12.1 m/s, the driver of an automobile suddenly locks the wheels by slamming on the brakes. The coefficient of kinetic friction between the tires and the road is 0.740. What is the speed of the automobile after 1.42 s have elapsed? Ignore the effects of ...
*October 18, 2014*

**chemistry**

which of the following is consistent with the line spectrum of the hydrogen atom? one of the choices is the nucleus is udnergoing gamma decay. but this si not one of the answers. Im just wondering what kind of decay happens?
*October 18, 2014*

**research help**

I need help with some research topics for a paper?
*October 17, 2014*

**Biology**

how does a change in the sequence of nucleotides in a strand of DNA might cause a protein to malfunction.
*October 16, 2014*

**Biology Help**

how does the structure of a cellulose molecule relates to the molecule’s function?
*October 16, 2014*

**math**

Ralph bought 4 books for k dollars each. Iris bought 5 books for k dollars each. If together they spend 90 dollars, how much is each book? 4k+5k=90 so 9k=90 90/9=10 so $10 each
*October 16, 2014*

**math**

Rhonda bakes p pies. Mary bakes 3p pies. If together they bake 20 pies, how many pies does Mary bake?Rhonda bakes p pies. Mary bakes 3p pies. If together they bake 20 pies, how many pies does Mary bake? I would've thought p+3=20 so 20-3=17 making it p=17 but not sure that ...
*October 16, 2014*

**math **

solve this equation a divided into 7=20 the actual problem has the divide sign. I got a=20*7 so a=140
*October 16, 2014*

**math **

solve this equation a divided into 7=20 the actual problem has the divide sign. I got a=20*7 so a=140
*October 15, 2014*

**physics**

Alice ((7.500x10^1) kg) and Bob ((8.5x10^1) kg) are standing at rest on friction free ice. Alice pushes Bob causing Bob to accelerate at (2.300x10^0) m/s^2. What is the magnitude of Alice’s acceleration?
*October 15, 2014*

**physics**

A (1.35x10^2) kg box is falling near Earth’s surface. It is accelerating at (7.3000x10^0) m/s^2 [D]. What is the force of air resistance on the box?
*October 15, 2014*

**vocabulary help**

When the realtor realized that there was a large dent in the floor, he tried to __________ cover it before the potential buyers noticed it. flagrantly ostensibly (my answer) surreptitiously latently Choose the word that best completes the sentence. After traffic made them late...
*October 15, 2014*

**Check my answers**

Question 1.Choose the answer that identifies the case of the parentheses word. My grandparents always go to the square dances with the Warrens and (them). nominative objective possessive *** my answer none of the above Question 2. Choose the pronoun that best completes the ...
*October 15, 2014*

**math**

Manuel painted 4 houses over the summer. John painted x houses. Patrick painted 2 houses. They painted 9 houses in all. How many houses did John paint? Not sure if it's x-(4+2)=9 or is it x+(4+2)=9
*October 15, 2014*

**math**

Max has 5 more than twice as many cookies as Chris. Write an expression that shows the number of cookies Max has if Chris has c cookies. 5+2x=c Not sure please help.
*October 15, 2014*

**math**

5 less than three times the number of chipmunks. We got 3x-5 but weren't sure.
*October 14, 2014*

**phys**

An electron of kinetic energy 50 keV moves in a circular orbit perpendicular to a magnetic field of 0.405 T. Find the radius of the orbit. I tried using KE=mv^2/2 to find velocity. then using qBv=(mv^2)/r to solve for r. but my answer was wrong. I am pretty sure this is the ...
*October 14, 2014*

**Perimeter and Area**

Which best describes the polygon whose vertices in the coordinate plane are (2, 3), (2, 3), (2, 1), (2, 1)? only equilateral only equiangular regular none of these
*October 14, 2014*

**Perimeter and Area**

Which best describes the polygon whose vertices in the coordinate plane are (5, 5), (0, 5), (0, 0), (5, 0)? only equilateral only equiangular regular none of these
*October 14, 2014*

**Lasting Influences**

i chose history but i'm having trouble explaining it
*October 14, 2014*

**Lasting Influences**

What of these Greek achievements was the most contribution to greek culture and explain. Military strategy Art and architecture Literature Drama History Philosophy Government
*October 14, 2014*

**Next Big Trend?**

what are two trends that can be expected to see in American stores next year?
*October 13, 2014*

**Algebra help**

Given f(x) = 5x 1. What is f(2)? is it 9?
*October 13, 2014*

**Business Math**

Andres Michael bought a new boat. He took out a loan for $23,980 at 3.75% interest for 4 years. He made a $4,470 partial payment at 4 months and another partial payment of $3,180 at 9 months. How much is due at maturity?
*October 10, 2014*

**business math**

Andres Michael bought a new boat. He took out a loan for $23,980 at 3.75% interest for 4 years. He made a $4,470 partial payment at 4 months and another partial payment of $3,180 at 9 months. How much is due at maturity?
*October 10, 2014*

**physics**

An astronaut is traveling in a space vehicle moving at 0.520c relative to the Earth. The astronaut measures her pulse rate at 74.0 beats per minute. Signals generated by the astronaut's pulse are radioed to the Earth when the vehicle is moving in a direction perpendicular...
*October 10, 2014*

**math**

13 2/5 - 4 1/5 = 9 1/5
*October 10, 2014*

**math**

Yeah, you could of used a calculator, it would save a lot of time
*October 10, 2014*

**stats**

Suppose that f(x) = 1:5x2 for -1 < x < 1 (0 elsewhere). Determine the following probabilities: (a) P(X > 0) (b) P(X > 0:5) (c) P(-0.5 < X </= 0.5) (f) Determine x such that P(X > x) = 0.05 (g) Find the cdf of X. could someone just get me started...
*October 8, 2014*

**algebra**

What is the solution to the linear system of equations? x + 4y = 8 x y = 7 (4, 3) (4, 3) (7, 0) The system has no solution.
*October 8, 2014*

**math help**

What is the solution to the linear system of equations? x + 4y = 8 x y = 7 (4, 3) (4, 3) (7, 0) The system has no solution.
*October 8, 2014*

**math help**

Given f(x) = x 10. What is f(7) i think its -10
*October 8, 2014*

**help plz**

Which relation is a function? {(5, 1), (4, 9), (6, 10)} {(0, 3), (0, 9), (12, 4)} {(5, 5), (5, 9), (5, 15)} {2, 10), (6, 10), (2, 3)} the third one?
*October 7, 2014*

**math help**

I think the answer is:Domain: {4, 0, 8}; Range: {2, 1, 5, 10}
*October 7, 2014*

**math help**

What are the domain and range of the relation {(4, 2), (0, 1), (0, 5), (8, 10)}?
*October 7, 2014*

**Sewing and Technology**

What color should the thread on the bobbin be? a color that complements the thread spool a darker color than the thread spool a color that contrasts with the thread spool the same color as the thread spool number2?
*October 6, 2014*

**Sewing and Technology**

Basting stitches would be best used for which of the following purposes? delicate beadwork temporarily holding fabric adding an appliqué creating a hem I think its the 3rd one?
*October 6, 2014*

**Sewing and Technology**

i think its the first one?
*October 6, 2014*

**Sewing and Technology**

foot pedal bobbin thread guide needle
*October 6, 2014*

**Sewing and Technology**

The speed at which the machine sews is controlled by the
*October 6, 2014*

**Sewing and Technology**

Television design shows can be a good source for designers. true or false
*October 6, 2014*

**Sewing and Technology**

Which of the following represents the correct formula for calculating the amount of fabric needed to make a curtain? A. length x width) + seam allowance B. (length x seam allowance) + width C. (length + seam allowance) x (width + seam allowance) D.(seam allowance x 2) + (...
*October 6, 2014*

**English**

Him is the correct one.
*October 6, 2014*

**math**

At noon, ship A is 20 nautical miles due west of ship B. Ship A is sailing west at 24 knots and ship B is sailing north at 25 knots. How fast (in knots) is the distance between the ships changing at 5 PM? I have tried multiple times but keep getting confused.
*October 5, 2014*

**Analytic Geometry CHECK MY ANSWER**

What is the slope of the line that passes through the points (2, 3) and (2, 6)? Option A: -3/2 Option B: -3/4 (MY ANSWER) Option C: 3/4 Option D: 0
*October 3, 2014*

**Analytic Geometry CHECK MY ANSWER**

A neighborhood swim club charges a one-time fee of $25 to join and $85 each month. If n is the number of months of membership and t is the total amount spent, then the variables are related by the equation t = 85n 25. Which variable is the independent variable? A.t B.n C. ...
*October 3, 2014*

**math**

f(x, y) = 3y cos x, 0 ¡Ü x ¡Ü 2¦Ð what is the saddle point for this?
*October 2, 2014*

**organic compounds**

Discuss the types of trace elements in organic compounds.
*October 1, 2014*

**slopes**

thanks :)
*October 1, 2014*

**slopes**

what is the slope of the line (4,9) and (2,9)?
*October 1, 2014*

**physics**

A cannon is fired horizontally from a platform . The platform rests on a flat, icy, frictionless surface. Just after the shell is fired and while it is moving through the barrel of the gun, the shell (mass 3.2 kg) has an acceleration of 12500 m/s2. At the same time, the cannon...
*September 30, 2014*

**Threading a machine**

How do you thread a sewing machine?
*September 30, 2014*

**Good Neighbor Day**

What are some ways you can be a good neighbor?
*September 30, 2014*

**stats and prob**

Consider a sequence of independent Bernoulli trials with p= 0.2 a) what is the expected number of trials to obtain the first success? for this I thought of it as geometric so 5 trials b) after the eighth success occurs, what is the expected number of trials to obtain the ninth...
*September 30, 2014*

**chemistry**

i got 6.667. what does this mean?
*September 27, 2014*

**chemistry**

an electron in n=5 emits 4052 nm to what energy level does the electron move
*September 27, 2014*

**physics**

In a TV set, an electron beam moves with horizontal velocity of 2.5 × 107 m/s across the cathode ray tube and strikes the screen, 44 cm away. The acceleration of gravity is 9.8 m/s2 . How far does the electron beam fall while traversing this distance? Answer in units of m
*September 27, 2014*

**chem**

The electron in a ground state H atom absorbs a photon of wavelength 121.57nm, to what energy level does the electron move?
*September 27, 2014*

**Chemistry of Life**

thank you!!!!!!
*September 26, 2014*

**Chemistry of Life**

Which statement is true about water molecules? The oxygen atom has a negative charge. The hydrogen atoms do not share electrons. Water molecules move randomly around each other. Water molecules cannot dissolve many substances. Question 2. How does water relate to the ability ...
*September 26, 2014*

**math**

Which equation is equivalent to 3x + y = 5? (Points : 1) y = 5 3x y = 5 + 3x y = 3x 5 y = 3x 5
*September 26, 2014*

**Algebra HELP PLEASE**

No the choices are these: (3, 11) (2, 1) (1, 3) (5, 5)
*September 26, 2014*

**Algebra HELP PLEASE**

Which is a solution to the equation y = 2x 5?
*September 26, 2014*

**physics**

if a man moving away with the speed of 0.5 of sound from a stationary sound source producing a sound of frequency , he would hear a sound of frequency
*September 25, 2014*

**trignometry**

prove that the area of any triangle XYZ is y^2*sin(x)*sin(z)/2*sin(y)
*September 25, 2014*

**trignometry**

prove that the area of any triangle XYZ is y^2*sin(x)*sin(z)/2*sin(y)
*September 25, 2014*

**Plz Hellp**

Wanda took out a personal loan for $16,000 at 9% simple interest. How much interest will she pay after 5 years? Suppose she pays off the loan in 3 years instead of 5 years. How much money will she save in interest?
*September 24, 2014*

**math**

number 1 is d and number2 is b
*September 24, 2014*

**Algebra**

Wanda took out a personal loan for $16,000 at 9% simple interest. How much interest will she pay after 5 years? Suppose she pays off the loan in 3 years instead of 5 years. How much money will she save in interest?
*September 24, 2014*

**Science**

smallest unit that consists of at least one atom A. Protons B. Neutrons C. Electrons D. Molecules Im thinking D but im not sure i don't remember.
*September 24, 2014*

**MATH-Help! **

A new set of car tires has a tread depth of 8 millileters. The tread depth decreases 0.12 millimeter per thousand miles driven. Write an equation that gives the tread depth as a function of the distance driven. Then predict what distance the tread depth will be 2 millimeters....
*September 23, 2014*

**Grammar**

1. Choose the answer that identifies the form of the verb in the sentence. Cindy is painting her room purple. present present participle past past participle Question 2. Choose the answer that identifies the tense of the verb in the sentence. Has the rain stopped yet? past ...
*September 23, 2014*

**math**

The wave heights h in the open sea depend on the speed v of the wind and the length of time t that the wind has been blowing at that speed. Values of the function h = f(v, t) are recorded in feet in the following table. the values that you need on the table are.. 20hr/30 knots...
*September 23, 2014*

**math**

a radio uses one-third the number of watts used by lamp, and a heater that uses 15 times as many watts as a lamp. when all are in use, the total electrical power is 1.1 kilowatts how many does the radio use?
*September 23, 2014*

**Chemistry**

How many carbon atoms are contained within 10.0 pounds of sugar, (sucrose) which has the formula c12h22o11?
*September 22, 2014*

**Chemistry**

Suppose a metal worker shapes a 3.4 mg piece of gold until it is a thin, perfectly square plate that is uniformly 8.6x10^-6 cm thick. What is the length of a side of the plate, in cm?
*September 22, 2014*

**Empires**

I need help to compare and contrast the Babylonian and Hittite empires
*September 22, 2014*

**geography**

How does chinas geography influence how people live in china?
*September 22, 2014*

**geography**

How did the geography of China affect the development of early civilization there?
*September 22, 2014*

**Community service**

Do you need to have hours to graduate high school?
*September 22, 2014*

**Algebra( check my answers)**

1. Juan deposited $200 in a savings account earning 3% interest over 2 years. What was the total amount of interest earned after 2 years? $12 $24 $120 ( my answer) $240 2. Mary borrowed $11,000 at 5% interest for 4 years. What was the total interest? $22 $220 $2200 (my answer...
*September 19, 2014*

**algebra **

how to write recursive formula and give one example of one
*September 18, 2014*

**World History**

Why did the Hittites and others migrate from central Asia to Mesopotamia? They needed more land for growing populations. They were enlarging their empire. The Persian army drove them out. Climate change brought a mini ice age to Asia.
*September 17, 2014*

**World History**

What was the significance of the Code of Hammurabi? The laws were developed from an ancient Sumerian code of laws. The laws were displayed throughout the empire for all to see. The laws guaranteed many freedoms for ordinary citizens. The laws guaranteed equality between the ...
*September 17, 2014*

**Sixth Grade Simplest Form**

Thank you Mia!
*September 16, 2014*

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