Monday

September 22, 2014

September 22, 2014

Total # Posts: 1,350

**Physics**

Please show steps and thank you! An astronaut of mass 70 kg carries an empty oxygen tank of mass 14 kg. He throws the tank away from himself with a speed of 3 m/s. With what velocity does the astronaut start to move through space?
*January 14, 2012*

**Physics **

PLEASE HELP! and include steps of how you solved it! What magnitude of force, acting for 0.025 s, will change the velocity of a 100 g ball from 30 m/s eastward to 40 m/s westward?
*January 14, 2012*

**Chemistry**

How many Calories of energy does it take to heat 257 mL of water by 62.2 C?
*January 10, 2012*

**Math**

(2^n) - 1
*January 10, 2012*

**Precalculus**

Is this correct? 1. Find the solution set for x^2/(x+3) < 9/(x+3). x^2/(x+3) < 9/(x+3) x^2 < 9 x^2 - 9 < 0 (x-3)(x+3)<0
*January 10, 2012*

**socials**

You've neglected to mention economy. Although it is horrid and quite unfortunate, it is a way to regulate population. As prices go up, an increasing number of individuals fail to meet the costs of standards to living. These people can sometimes die from hunger, refrain ...
*January 10, 2012*

**Physics**

What magnitude of force, acting for 0.025 s, will change the velocity of a 100 g ball from 30 m/s eastward to 40 m/s westward?
*January 8, 2012*

**PHYSICS 11th**

A girl holds a 1.7 kg air rifle loosely and fires a bullet of mass 2 g. The muzzle velocity of the bullet is 160 m/s. What is the magnitude of the recoil velocity of the gun?
*January 6, 2012*

**PHYSICS**

A 62 kg water skier, moving at 14 m/s , lets go of the towline. Momentum= 868 kgm/s Impulse= -868 Ns c.If the water exerts an average force of -275 N on the skier, how long must the force act? 3.16 s d. How far does she travel during this time? I'm guessing "this time...
*January 6, 2012*

**precalulus**

Ok feeling kinda dumb because this isn't coming out right. I know it's simple. log6 (x -3) + log6(x -6) - log6(x + 1) = 2
*December 21, 2011*

**algebra**

given f(x) and g(x) find a. f + g b. f -g c. f*g d. f/g f(x) = sqrt x g(x) = 6x - 5
*December 21, 2011*

**pre calculus**

given the following rational function a. state the domain b. find the vertical and horizontal asymptotes if any c. find the oblique asymptote f(x) = x^2 + 7x + 5 / x + 8
*December 21, 2011*

**pre calculus**

verify functions f and g are inverses of each other by showing that f(g(x)) = x and g(f(x)) = x. f(x)= 5/(2 -x) g (x) = 2 - 5/x
*December 21, 2011*

**algebra**

Thank you!
*December 20, 2011*

**algebra**

solve the inequality express in interval notation x^4 + 4x^3 - 9x^2 - 36x < 0
*December 20, 2011*

**pre calculus**

Thank u!
*December 20, 2011*

**pre calculus**

Solve the exponential equation Express you solutions in exact form only Please show your work e^2x - 9e^x - 20 = 2
*December 20, 2011*

**algebra**

solve the exponential equation Express in exact form. 5e^xlog_9 = 11 Is x = (ln11-ln5/log_9 exact form??????
*December 18, 2011*

**algebra**

solve the logarithm log_2 (x -1)- log_2(5x +1) = -3 I got -3, is this correct???????
*December 18, 2011*

**algebra**

You make it look so easy and I have been pounding my head on the wall. Thank you!
*December 17, 2011*

**algebra**

Solve the equation below. Please show all of your work log_7(x + 3/7) = -2
*December 17, 2011*

**precalulus**

Change the exponentional expression to an equivalent expression involving a logarithm. 7^c = 0.026
*December 17, 2011*

**pre calculus**

It's ok figured that out on my own :)
*December 17, 2011*

**pre calculus**

graph the function below. Determine the domain, range and horizontal asymptote. f(x) = -(3/4)^x - 1
*December 17, 2011*

**critical thinking ( is it correct)**

It’s a deductive argument. Because all its premises are true (Many universities have begun using I<Clicker 2 to capture student response information in the classroom, and 94% of users agree that the product is effective or extremely effective) then its conclusion must ...
*December 16, 2011*

**pre calculus**

Can someone please help me with this???????
*December 15, 2011*

**pre calculus**

I have worked this over and over still think it's wrong. find its inverse, domain, and range of f and f^-1 f(x) = 5/ (3x -7)
*December 15, 2011*

**algebra**

Someone please help me with this!!!!
*December 13, 2011*

**algebra**

The period t ( in seconds) of a simple pendulum as a function of its length l(in feet) is given by t(l) = xpie sqrt 1/32.2 a. Express the length l as a function of the period t b. How long is a pendulum whose period is 3 seconds. Is the answer 2 sec for a and 2.25 feet for b?????
*December 13, 2011*

**math**

short leg = 4; to find long leg multiply 4 x 2; long leg = 8; to find how high; use x^2 + 4^2 = 8^2 so: x^2 + 16 = 64; subtract 16 from both sides: x^2 = 48; find the square root of 48; x = 6.93 so the top of the ladder is 6.93 m above the ground.
*December 13, 2011*

**pharcare**

thanks:)
*December 13, 2011*

**pharcare**

human development and its dominant characteristics,please give me the link I can't find it.thanks:)
*December 13, 2011*

**Chemistry**

Selenium from 0.108 g of Brazil nuts was converted into a fluorescent product, which was extracted into 10.0 mL of cyclohexane. Then 2.00 mL of the cyclohexane solution were placed in a cuvet for fluorescence measurements. A.) Standard additions of fluorescent product ...
*December 12, 2011*

**physics**

a.) P = (mgd)/t so just plug in and solve b.) mgy(spring) + 1/2ky(spring) = mgy(crate) y(spring) = mgy(crate) / (mg+1/2k) and now you can plug in again and solve
*December 11, 2011*

**algebra**

Me too but it gets counted wrong in this format.
*December 10, 2011*

**algebra**

Solve the following inequality and write your answer using interval notation . Please show all your work 10^3 + 6x^2 - 90x - 54 < 0
*December 10, 2011*

**pre calculus**

Thank you!
*December 10, 2011*

**pre calculus**

Use the remainder theorem to find the remainder when f(x) is divided by x -2. Then use the factor theorem to determine whether x -2 is a factor of f(x) f(x) = 2x^5 + 6x^4 - x^2 - 7x - 12
*December 10, 2011*

**algebra**

Thank you!
*December 9, 2011*

**algebra**

solve the following in the real number system x^3 + 8x^2 + 10x - 15 = 0 Please help me!
*December 9, 2011*

**pre cal**

ok I am at a total loss here. I have a graph with the points (0,-3) (0,-5) (3,-2) (5,-7) with vertical asymptote of (6,1) I have to find the rational function. where do I start?
*December 8, 2011*

**college alegebra**

Thank you that helps a lot!
*December 8, 2011*

**college alegebra**

solve the following equation in the real number system 3x^3 - 20x^2 + 29x +12 = 0 Ok I thought I knew how to do this but I guess I don't. Help me! Please!
*December 8, 2011*

**macroeconomics**

The relationship between inflation and aggregate demand is negative. the relationship between inflation and real interest rate is a positive. ( not sure if its right) the relationship between aggregate demand and real interest rate is negative.
*December 5, 2011*

**macroeconomics**

how does someone go about deriving the aggregate demand function? what should i explain first
*December 5, 2011*

**critical thinking**

if we reason from the fact that all A's observed so far are B's to the conclusion that all A's whatsoever are B's, Which kind of induction would we be utilizing? I'm not sure but i think it's disjunctive syllogism.
*December 4, 2011*

**critical thinking**

i was wrong its actually induction by enumeration.
*December 4, 2011*

**critical thinking**

I hate when they play around with words it's so confusing.
*December 4, 2011*

**critical thinking**

if we reason from the fact that all A's observed so far are B's to the conclusion that all A's whatsoever are B's, Which kind of induction would we be utilizing? I'm not sure but i think it's disjunctive syllogism.
*December 4, 2011*

**Algebra 1**

A bakery makes bread in batches. Several loaves per batch are rejected due to defects. Your friend says that the total number of defective loaves is the independent variable. Explain and correct the error.
*December 4, 2011*

**pre cal**

Is the given function linear or nonlinear. If linear determine the slope. x y = f(x) 1 -2 -2 -14 3 8 4 4 -6 1
*December 1, 2011*

**algebra**

Ok, think I finally got this. Got to a certain point and was wondering what now? Thank you so much!
*December 1, 2011*

**algebra**

the correct equation is F(x) = (x + 1/4)^4 (x^2 + 1)^5
*December 1, 2011*

**algebra**

I do it's 1/4 instead. sorry
*December 1, 2011*

**algebra**

For the polynomial below list each real zero and its multiplicity. f(x) = (x + 1/1)^4 (x^2 + x)^5 Really need some help with this! Have worked it twice and got two different answers!
*December 1, 2011*

**algebra**

sorry about that, it was the second one. Thank you, I figured it out and also got -1/11 so feel better knowing it is right.
*December 1, 2011*

**algebra**

given the following quadratic equation, determine if it has a maximum or a minimum value. Then find the maximum or minimum value f(x) - -11x^2 - 2x - 7
*December 1, 2011*

**College Physics**

Dry Ice. At standard atmospheric pressure, the solid form of carbon dioxide called “dry ice” undergoes a phase change not to a liquid but straight to a gas. This process is called sublimation, and like other phase transitions heat energy is required. In this case it ...
*November 30, 2011*

**PHYSICS**

a) How much energy is required to evaporate all the water in a swimming pool of area 158 m2 and depth 4.1 m (b) The intensity of sunlight is about 1080 W/m2. If all of this energy is absorbed by the water in the pool, how long will it take for take the water to evaporate?
*November 30, 2011*

**computer**

thanks for the help :)
*November 25, 2011*

**computer**

it is a timeline,what i mean is example.thanks :)
*November 25, 2011*

**computer**

recently developed computer technology and give its description,inventor,year invented and the purpose why it was developed.
*November 25, 2011*

**math**

what am i supposed to do?
*November 16, 2011*

**Chemistry**

my discussion is tomorrow thanks guys ;)
*November 16, 2011*

**Math**

this is math. not in reality. you have to use a proportion and that's what i need help with.
*November 15, 2011*

**Math**

Your heart bears 240 times in 4 minutes. What is your heart rate in beats per second? Explain
*November 15, 2011*

**Physics**

Two nearby nodes of a standing wave are separated by 4.5 m. If the frequency of the wave is 184 Hz, what is the speed of the wave?
*November 14, 2011*

**spirituality and supernatural**

We can see that spirituality and the supernatural plays a large role in any culture and society, it's influence can be seen in the Buddhist sects of Japan. How this influence is seen within the Japanese culture through modern media and films. How do films and media display...
*November 11, 2011*

**Opinion on Myths**

What do you make of the similarities between Japanese and Greek myths (for lack of a better word)?
*November 11, 2011*

**opinion**

Do you think that fantasy movies about social issues help to bring the right kind of attention to the matter, or do they detract and/or lessen it's actual severity?
*November 11, 2011*

**math HELP FAST PLEASE**

i dont know it thats why i'm asking u.
*November 9, 2011*

**math HELP FAST PLEASE**

bella baked 6 dozen cookies. she wants to keep 1 dozen and give the rest to 20 friends. she wants to give an equal number of cookies to each friend. how many cookies does each friend get? justify your answer.
*November 9, 2011*

**Math HELP FAST PLEASE**

chris has some rice cakes and 1 granola bar as a snack. the snack contained a total of 560 calories. if the granola bar had 120 calories and each rice had 40 calories, how many rice cakes did chris have? explain
*November 9, 2011*

**Math HELP FAST PLEASE **

liz earns a weekly salary of $459 and $20 per hour for each overtime hour she works. this week her total pay including salary and overtime pay was $559. write an equation to represent this situation. how many hours of overtime did liz work?
*November 9, 2011*

**math HELP FAST PLEASE**

sal's movie rental club membership costs $11 per month. with a membership, each movie costs $2. sal's monthly movie rental charge was $23. how many movies did sal rent?
*November 9, 2011*

**Math**

three friends each own land in the same town. Miguel owns 71/2 acres. Jorge & Juanita own the same number of acres. if the friends own 20 1/3 acres altogether, how many acres do Jorge and Juanita owns?
*November 9, 2011*

**Math**

Vicky uses 1 2/3 cup milk for a muffin recipe. If she wants to make 3 times the amount of muffins, how much milk will she use?
*November 9, 2011*

**Math**

Leroy ran a total of 15 miles last month. He ran 5/8 mile each day. How many days did he run?
*November 9, 2011*

**College Physics**

A steel piano string for the note middle C is about 0.68 m long and is under a tension of 400 N. If the fundamental frequency is 226 Hz, what is the string’s diameter?
*November 6, 2011*

**College Physics**

A child plays on a bungee cord and oscillates with a certain frequency f. An adult with a mass that is 16 times greater than that of the child then uses the same bungee cord. What is the ratio of the frequency with the adult to the frequency with the child? I tried to answer ...
*November 6, 2011*

**statistics**

Help me! Population of heights of college students is approximately normally distributed with a mean of 64.37 inches and standard deviation of 6.26 inches A random sample of 74 heights is obtained. Find the mean and standard error of the x bar distribution 2. Find P(xbar > ...
*November 6, 2011*

**statistics**

If a population has a standard deviation of 5 units what is the standard error of the mean if samples of size 25 units are selected????
*November 4, 2011*

**Anime**

How would you differentiate anime from American animated series/films? Is it in the story-line, art, etc.? Do they influence one another? Also, how has anime evolved over time, and what exactly is its purpose?
*November 2, 2011*

**s.s**

i mean i understand where you are coming from all im sying is there is no need to be rude about it :)
*November 2, 2011*

**s.s**

Ms. sue i just have one question for you why do you have to jump into every post and be such a snarky stick int he mud i mean people need help alot of the books suck and public school teachers dont care anymore i mean people come and ask for help and you just spit in their ...
*November 2, 2011*

**critical thinking.**

which of the following is the best example of "negative evidence" for the claim," samsung makes excellent quality phones"? A. 50.6 of htc evo users prefer evo to samsung's android. B. the main competitors of samsung are htc,nokia and black barry. C. 4 ...
*October 31, 2011*

**critical thinking. Please help.**

I was wrong. For question 2 I'm think it's C. (hope I'm right) and for the truth and false question .I think its true. but i'm not sure!
*October 31, 2011*

**critical thinking. Please help.**

Truth or False : for business writing,it is always best to present the most analytical, matter of fact writing in order to be convincing. most claims in business,and in persuasive writing generally tend to be contestable claims.this requires the author of the argument to do ...
*October 31, 2011*

**Chemistry**

A person suffering from hyponatremia has a sodium ion concentration in the blood of 0.118 Mand a total blood volume of 4.6 L.What mass of sodium chloride would need to be added to the blood to bring the sodium ion concentration up to 0.138 M, assuming no change in blood volume?
*October 31, 2011*

**Chemistry**

(a) Calculate the molarity of a solution that contains 0.175 mol ZnCl2 in exactly 150 mL of solution. (b) How many moles of HCl are present in 35.0 mL of a 4.50 M solution of nitric acid? (c) How many milliliters of 6.00 MNaOH solution are needed to provide 0.325 mol of NaOH?
*October 31, 2011*

**Chemistry**

An aqueous solution of an unknown solute is tested with litmus paper and found to be acidic. The solution is weakly conducting compared with a solution of NaCl of the same concentration. Which of the following substances could the unknown be: KOH,NH3,HNO3, KClO2, H3PO3, ...
*October 31, 2011*

**Opinion**

Generally speaking, what can we learn from a society's villains faced by its heroes that we can't learn from its heroes? Is it easier for you (personally) to understand what a villain represents than a hero? On a similar note, do you think it's easier to say what ...
*October 28, 2011*

**science**

In what direction do you turn the coarse focus adjustment know to move the object away from your slide? In what direction do you turn the fine adjusment?
*October 27, 2011*

**physics**

A person can jump a maximum horizontal distance (by using a 45 projectile angle) of 5 m on Earth. What would be the maximum range on Mars, where the acceleration due to gravity is 0.38 g?
*October 25, 2011*

**physics help please**

A long jumper leaves the ground at an angle of 25.2 to the horizontal and at a speed of 11.2 m/s. How far does he jump? The acceleration due to gravity is 9.8 m/s2 . Answer in units of m What maximum height does he reach?
*October 24, 2011*

**Physics Honors**

@ K, You should check your work before posting an answer. The correct answer should be a) 3.5s b) 21m
*October 23, 2011*

**Physics**

The region of the solar system between Mars and Jupiter contains many asteroids that orbit the Sun. Consider an asteroid in a circular orbit of radius 4.0 1011 m. Find the period of the orbit IN SECONDS!!!???
*October 22, 2011*

**Fighting Style**

Which fighting style is mainly used in modern day films and why? With Bruce Lee creating his own style of martial arts, what research did Bruce Lee had to do for his his style Jeet Kun Do to be successful and does it still exist in modern times? Does the Jeet Kun Do style used...
*October 19, 2011*

**College Physics**

In Chapter 3 we learned that the force of air drag on an object moving rapidly through the air is proportional to v2, where v is the speed of the ball relative to the air. The same relation applies to the force of the wind on the blades of a wind turbine (Figure 9.4), where v ...
*October 18, 2011*

**College Physics**

A rod of mass 4.3 kg and length 4.3 m hangs from a hinge as shown in Figure P9.28. The end of the rod is then given a “kick” so that it is moving at a speed of 2.3 m/s. How high will the rod swing? Express your answer in terms of the angle (in degree) that the rod ...
*October 18, 2011*

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