Monday

February 8, 2016
Total # Posts: 2,097

**Russian History**

Did Peter the Great end communism?
*February 1, 2012*

**Physics**

A speeder traveling at a constant speed of 102 km/h races past a billboard. A patrol car pursues from rest with constant acceleration of (9 km/h)/s until it reaches its maximum speed of 146 km/h, which it maintains until it catches up with the speeder. How long does it take ...
*January 28, 2012*

**Physics**

A copper (Cu) weight is placed on top of a 0.24 kg block of wood (density = 0.60*10^3 kg/m3) floating in water. What is the mass of the copper if the top of the wood block is exactly at the water's surface?
*January 24, 2012*

**Precalculus**

The figure below shows a conchoid of Nicomedes. The top part is formed by a ray from the origin that rotates through an angle t° with the x-axis. The ray intersects the fixed line y = 2 at point A. From A you measure out 7 more units to point P on the graph of the conchoid...
*January 20, 2012*

**Precalculus**

Thank you so much!
*January 20, 2012*

**Precalculus**

Given r = 10 cos θ If you sketched an angle of θ = 150 degrees, what quadrant would it be located in? It's either the first or second... I think second? Multiply both sides of r = 10 cos θ by r. Transform the resulting equation into Cartesian coordinates.
*January 20, 2012*

**Precalculus**

Ohmygoodness. Hhaha. Thanks!
*January 20, 2012*

**Precalculus**

This is probably silly, but where is the 2 in the beginning of all of those from?
*January 20, 2012*

**Precalculus**

Write the three cube roots of 8 cis (-30°).
*January 20, 2012*

**Precalculus**

So the answer for "Give the equation of the line in rectangular coordinates." is sqrt(x^2+y^2) = 4 [sqrt(x^2+y^2) ]/y? Or is it the y=4? Again, that's probably a silly question..
*January 20, 2012*

**Precalculus**

The polar equation of a graph is given below: r=4/sin(theta) Give the equation of the line in rectangular coordinates. If you rotate this graph 40 degrees counterclockwise about the pole, would you add or subtract 40 degrees to θ? Subtract?
*January 20, 2012*

**Precalc**

*(x + 5)(x^2 - 6x + 13)
*January 20, 2012*

**Precalc**

Given g(x) = (x + 5)(x2 - 6x + 13), find the one real zero of g(x): I think it's -5 Find the two complex zeros of g(x):
*January 20, 2012*

**Precalculus**

The figure shows part of a curve traced by a point on the circumference of a circle of radius 4 that rotates, without slipping, around a fixed circle of radius 2. The rotating circle starts with angle t = 0 radians and the point P (x, y) at (10, 0). In this problem you will ...
*January 20, 2012*

**Precalculus**

This figure shows concentric circles of radii 3 and 5, respectively, centered at the origin of an xy-coordinate system. A ray from the center at an angle of t degrees to the x-axis cuts the two circles at points A and B. From A, a vertical line is drawn; and from B, a ...
*January 20, 2012*

**Precalculus**

QUESTION 1 Joe intercepts a pass 8 yards into the end zone, 19 yards from the right side of the field as he faces the opposite end of the field (see figure). He starts running diagonally, moving at a rate of 4 yd/s down the field and 2 yd/s across the field. Let x and y be his...
*January 20, 2012*

**Precalculus**

I don't even how to go about this.... Mars is in an elliptical orbit with the Sun at one focus, as shown in the figure. At its aphelion, Mars is 156 million miles from the Sun. At its perihelion, Mars in only 128 million miles from the Sun. How long is the major axis of ...
*January 20, 2012*

**Precalculus**

A geometric series has t1 = 100 and t2 = 90. Find the number to which Sn converges as n gets very large.
*January 20, 2012*

**Precalculus**

Thanks!
*January 20, 2012*

**Precalculus**

A geometric series has t1 = 3 and r = 2. If tn = 96. What does n equal in this problem? What is the special name given to the terms between 3 and 96 in this problem?
*January 20, 2012*

**Precalc**

(10 cis 200) (2 cis 50) = ? Is it just 20cis(10000)?
*January 20, 2012*

**math problem**

No. 6(-4)-5(7)=-35, not -2.
*January 20, 2012*

**Language**

The other is bad hair (hare) day. Too funny.
*January 20, 2012*

**Language**

The main (mane) part. Clever.
*January 20, 2012*

**Language**

Toed (Toad) is the first.
*January 20, 2012*

**science**

Arranging species into classes.
*January 19, 2012*

**counciling**

Maybe about what you learned from one of the sadder times in your life?
*January 19, 2012*

**counciling**

Neither, just honest.
*January 19, 2012*

**physics**

While John is traveling along an interstate highway, he notices a 166 mi marker as he passes through town. Later John passes a 120 mi marker. What is John’s current position?
*January 16, 2012*

**physics**

A jet travels at 434 m/s. How long does it take to travel 294 m? Answer in units of s
*January 16, 2012*

**physics**

While John is traveling along an interstate highway, he notices a 166 mi marker as he passes through town. Later John passes a 120 mi marker. What is the distance between town and John’s current location? Answer in units of mi
*January 16, 2012*

**physics**

A sound wave, traveling at 348m/s, is emitted by the foghorn of a tugboat. An echo is heard 1.99 s later. How far away is the reflecting object? Answer in units of m
*January 16, 2012*

**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*

**Physics**

i hate vasts
*December 28, 2011*

**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*