Sunday

September 25, 2016
Total # Posts: 4,337

**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*

**please check my english**

WRONG! It's D, B, D, B, D, A, D

*October 13, 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*

**Sixth Grade Simplest Form**

A. Oranges = 3/2 apples = 9/5 blueberries = 3/4 peaches = 2

*September 16, 2014*

**Sixth Grade Simplest Form**

Im having a hard time trying to solve this problem. Can someone please help me? Marcial found a recipe for fruit salad that he wanted to try to make for his birthday party. He decided to triple the recipe. 3 1/2 cups thinly sliced rhubarb 15 seedless grapes, halved 1/2 orange...

*September 16, 2014*

**Chemistry**

To drain a round swimming pool that is 18.0 ft wide and 3.75 ft deep, a worker uses a pump that can move 7.58 gallons of water per minute. how many minutes will it take to drain the swimming pool?

*September 16, 2014*

**Chemistry**

very helpful. Thank you

*September 16, 2014*

**Chemistry**

A runner's average stride length is 41 inches. She takes 28 strides in 10.0 seconds. How many minutes does it take her to run 5.0 km?

*September 16, 2014*

**Biology**

Explain the role of a hypothesis in a scientific investigation

*September 16, 2014*

**chem**

if 2.19e-9 mol of 176-W emits 1.07e15 beta particles in 1 hour. what is the decay constant? how do i go about doing this? i know the equation 0.693=kt(1/2) but i dont think that is helpful here

*September 16, 2014*

**Biology**

thanks

*September 16, 2014*

**Biology**

In terms of energy, what is the difference between glucose and ATP?

*September 16, 2014*

**Algebra**

thanks

*September 15, 2014*

**Algebra**

30?

*September 15, 2014*

**Algebra**

What is the solution to the proportion? 4/12=10/x x = 3 x = 3.3 x = 4.8 x = 30

*September 15, 2014*

**Physics**

I have tried this question over and over and not sure if the answer is 16 west or 190 south west please help. Airplane One flies due east at 250 km/h relative to the ground. At the same time, Airplane Two flies 325 km/h, 35° north of east relative to the ground. What is ...

*September 14, 2014*

**math**

write two ratios that are equivalent to 1:1

*September 11, 2014*

**maths**

what number makes statement true: 30=0.3

*September 11, 2014*

**ENGR**

1. Use the axioms of probability to show the following: (a) For any event E, P{Ec} = 1 − P{E}. (b) P{∅} = 0. (c) For any events E and F, if E ⊂ F, then P{E} ≤ P{F}. (d) If the events E1, E2, and E3 are mutually exclusive, then P{E1∪E2∪E3} = ...

*September 10, 2014*

**calc**

Consider the vector function given below. r(t) = 7t, 3 cos t, 3 sin t (a) Find the unit tangent and unit normal vectors T(t) and N(t). i found T(t) but I can't get N(t)

*September 10, 2014*

**chem**

if 14.66ml of a standard .2616M KOH solution reacts with 57.5ml of CH3COOH solution, what is the molarity of the acid solution?

*September 9, 2014*

**statistics**

let E,F and G be three events. state expressions fo rthe events. a. only F occurs b. exactly two of the events occur. c. at leasat one of the events occur. d. E and G occur but F does not. how do I go about writing these. do I use like union and intersection?

*September 5, 2014*

**chemistry**

how many mL or .0252M HNO3 are required to neutralize 25.00mL of .0148M of Sr(OH)2? and how did you get the answer!!!

*September 1, 2014*

**Math- urgent**

Vong grilled 21 burgers at a block party. He grilled the same number of pounds of turkey burgers as hamburgers. Each turkey burger weighed 1/4 pound and each hamburger weighed 1/3 pound. How many of each did Vong grill?

*August 27, 2014*

**Math- urgent**

Solving Systems by Substitution Maribel has $1.25 in her pocket. The money is in quarters and dimes. There are a total of 8 coins. How many quarters and dimes does Maribel have in her pocket? I think the equation is 10x+25x=$1.25 and x+x=8 but I'm not sure.

*August 27, 2014*

**math**

calculate the upper limit for the definite integral from -2 to 2. oh x^2+1 dx with the partition P=-2,-1,0,1,2

*August 22, 2014*

**English**

Is there any website that checks your punctuation and grammer?

*August 19, 2014*

**math**

5/x+7/y=31,7x+5y=29xy by comparision and subsitition method

*August 19, 2014*

**Biology**

thank you

*August 18, 2014*

**Biology**

I think D.

*August 18, 2014*

**Biology**

Sorry its, C. Humans have had no impact on the world's environment D. Humans have had a large impact on the world's environment

*August 18, 2014*

**Biology**

Thank You So Much! IS B. THE ANSWER TO THIS ONE? Which of the following statements are true? A.) Destruction of rain forests has no effect on living things. B.) Destruction of rain forests increases the rate of evolution of rain forest organisms. C.) Humans have had no impact ...

*August 18, 2014*