Thursday

April 24, 2014

April 24, 2014

Total # Posts: 115

**Math**

Find the real and imaginary parts of the following complex numbers: (i) 1.5e^jπ/4 (ii) je^1.2 + j^2 e

**math**

Use logarithmic differentiation to find the derivative of the function. y = (cos 2x)x

**cal**

from the ans choices i have, I choose 8x^(3/2)-1/4x^(3/2)

**cal**

Find f"(x) for the function. f(x)= x^2+√x

**cal**

Yes, but how would i show the work.

**cal**

Find the integral. ∫ -10 x sin x^2 dx

**cal**

Sketch the graph and show all local extrema and inflection points. f(x)= 1/x^2-2x-8 I believe the ans is "Relative max: [1,-1/9]" and No inflection points".

**science**

what do angiosperms reproduce with??/

**socialstudies(2Qs)**

A woman has just lost her job at an automobile factory.She decides to move some place warmer to look for work in the thriving tourist industry.She is most likely migrating between which two regions? A.from the southeast to the northeast B.from the northwest to the southwest C....

**socialstudies(5Qs)**

thanks but could you let me know the answers because i dont have a book

**socialstudies(5Qs)**

hi guys could you check my social studies answer thanks.oh and if there wrong could you give me the right answer and some information. ---------------------------------------- 1.The climate throughout most of the united states is__________. A.tropical B.temperature C.rainy(i p...

**math**

1.62 is divible by which of the following numbers? A.1,3,31,62 B.1,2,3,31 C.1,4,16,62 D.1,2,31,62 I PICKED D. ------------------------------- 2.108 is divisible by which of the following sets of numbers? A.1,2,3,4,6,9,12,18,27,36,54,108 b.1,2,4,27,54,108 C.1,2,3,6,18,36,54,108...

**Math**

That's what they call dms and it's just another set of units for angles. To convert you can do the math or you can look up a calculator to convert the seconds and minutes back to a decimal in degrees.

**alegbra 1**

Look up the definitions and search for examples of these types of numbers. Here are some examples that might help get you started. real = 2 rational = 1/3 (although it goes .3333, it repeats indicating rationlaity) irrationsl = π (3.1415... no matter how far you go the nu...

**Math**

The number is 8.23 You just have to think about it like this if it's rounded to 8.2 either the first two numbers are 8.2 or the 8.1 since it has to round to .2 the numbers before it can be bewteen .0 - .4 to make it stay .2 or .5 -.9. Now at the same time think what can we...

**physics**

What is the apparent weight of a 25kg lead block submerged in the dead sea? (density of dead sea is 1240kg/m3)

**physics (please help elena)**

raiz quadrada de (GM/RS^2)

**Psychology**

A fleet of large trucks arrived in the mall parking lot after Janelle parked her car. When she returned to the lot she could not find her small vehicle in the maze of huge trucks. It took her at least half an hour of searching before she located her car. When telling the story...

**Psychology**

Do you think John forgets the time of his appointments? Perhaps he is always late because it makes him feel powerful or, maybe he is just disorganized?" These questions are being asked in order to
A. determine whether John's tardiness is dispositiona...

**Psychology**

Unfortunately I have a D in the class, but I am an A student." When there is a difference between what I believe and what I do,
A. cognitive dissonance will develop.
B. social cognition will be less decisive.
C. central route proc...

**Psychology**

well then it should be A right?

**Psychology**

One of the interesting aspects of family therapy is the "system" or roles which are assumed by family members. A good example would be _______________.
A. the father sometimes comes home late
B. the mother has difficulty making decisions&...

**Psychology**

I have never been a good problem solver. I am not direct enough to be successful," the client complained. "You do not see yourself as a direct problem solver?" responded the therapist. This conversation is typical of _______________.
A. dialect...

**english**

Ok, I need help with this one also. Some writers like to brainstorm their ideas on a scrap paper before sitting down to write. Others are less intimidated by a blank computer screen or piece of paper, and prefer to dive headfirst into a project. Many students find it useful to...

**english**

people question whether cheerleading is a sport.

**english**

There's more paragraphs, I think the main idea is Cheerleaders.

**english **

Read the following paragraphs and write a topic sentence that expresses the main idea of each. For example, if it is a sport, then some people wonder why cheerleaders must also be concerned with the neatness and uniformity of their appearance. In addition, since cheerleading d...

**Integrals**

Give a geometric description (including a sketch) of the integral 0∫3 2x − 3x dx .

**calculus**

A particle moves in a straight line under a force such that its displacement s(t), in metres, at time t seconds, is given by s(t) = t3 − 5t2 + 3t +15 Find the time at which the particle is at rest?

**calculus**

Find the area of the region between the parabola 4y = x^2 and the line 3x + 4 y = 4

**calculus**

Find the volume of the solid that is obtained when the region under the curve y = 4 − x^2/6 is revolved around the y -axis between y = 0 and y = 4 .

**calculus**

A manufacturer wishes to produce the most economical packaging for detergent. The containers need to hold 25litres and must be cylindrical in shape. What dimensions will ensure that the least amount of plastic is used to create the containers. (Note: the volume and surface are...

**Calculus**

Find the derivative of the following function f(x)=(x-3/2x+3)^2

**Calculus**

There are no parentheses, that's what is confusing me also. The questions is exactly as written above.

**Calculus**

Find the derivative of the following function: f(x)= 10x-3/5x +6x

**Physics**

Help with Problem 3b please!

**physics**

Hey guys, what about #4: Obtain a symbolic expression for the total elongation of the bar, δ. Anybody?

**Physics**

Two identical positive charges exert a repulsive force of 7.0 10-9 N when separated by a distance of 3.2 10-10 m. Calculate the charge of each. _C

**Physics**

Thanks Sat, but can you write your reasoning behind the answer?

**Quantum Physics**

Problem 5 please?

**Quantum Physics**

Answer for Question 5 please?

**math**

Maria gave a store clerk $10.00 for a purchase that cost $9.19. Part A What is the total amount of change Maria should have received from the clerk? Part B How would Maria receive her change using the least number of coins possible? Part C Show 1 way Maria could receive her ch...

**Physics**

A 2.3 kg block slides down a 25° inclined plane with constant acceleration. The block starts from rest at the top. At the bottom, its velocity is 0.65 m/s. The incline is 1.6 m long. What is the coefficient of friction?

**ENGLISH URGENT !!!!!!!**

Xbox stuff, PS3 stuff, cool shades, and of course cash.

**Math 208**

N=0.04x-78.34 determine the year in which there were 1.9million inmates

**Physics**

An object in equilibrium has three forces exerted on it. A 30 N force acts at 90° from the x axis and a 48 N force acts at 60°. What are the magnitude and direction of the third force? . N ° (counterclockwise from the +x direction)

**Physics- Help**

Five forces act on an object. (1) 63 N at 90° (2) 40 N at 0° (3) 75 N at 270° (4) 40 N at 180° (5) 50 N at 60° What are the magnitude and direction of a sixth force that would produce equilibrium?

**Physics- Help**

Five forces act on an object. (1) 63 N at 90° (2) 40 N at 0° (3) 75 N at 270° (4) 40 N at 180° (5) 50 N at 60° What are the magnitude and direction of a sixth force that would produce equilibrium?

**Physics- Help**

Five forces act on an object. (1) 63 N at 90° (2) 40 N at 0° (3) 75 N at 270° (4) 40 N at 180° (5) 50 N at 60° What are the magnitude and direction of a sixth force that would produce equilibrium?

**Physics**

After a day of testing race cars, you decide to take your own 1590 kg car onto the test track. While moving down the track at 10.0 m/s, you uniformly accelerate to 26.0 m/s in 10 s. What is the average net force that you have applied to the car during the 10 s interval?

**physics**

A diver runs and dives off the end of a spring board that is 0.9 meters above the surface of the water. As she takes off from the diving board, her velocity is 5.2 m/s directed 36° above horizontal calculate: a) the time she is in the air s b) the distance she lands from t...

**chemistry**

the density of water 20 degrees celcius is 1.00g?mL and the densityof ethylene glycol is 1.114g/mL, if 100.0mL if water is combined with 25.0mL is ethylene glycol, what would be the density of this mixture?

**Math**

2= squared x2+y2+z2+36 then square rooted and then the number must be rational. I need x y and z. I already used 10 8 and 5

**social studies**

TAXATION WITHOUT REPRESENTATION Tea tax stamp tax there are tons The Boston Massacre taking away our charters and imposing martial law Just a bit of interesting info The northern colonies were the biggest troublemakers the southern ones just sort of sat there minding there own...

**Vertex edge graphs**

OK ignore the graph the spaces didnt stay when i submitted it the verticies form a pentagon

**Vertex edge graphs**

OK so my friend asked me how to solve this question i didn't know how but tried anyway and got the right answer but i want to know if i did it correctly 6 boys are working on 5 go carts. each boy works on more than one cart. it takes one weekend to make one cart. there are...

**math**

48-36=12 so unless you have a value for y or are setting the whole problem equal to something 9y^2+12 is as solved as it gets

**problem solving**

well you could solve it the long way 28 24 20 16 12 8 4 add um all up=112 108 is 4 less so subtract the last row, 6 rows there is some equation that is soposed to be faster, but seeing as all that took me 40 seconds aprox. WELL

**7th grade math**

do you Know the equation y=mx+b if you dont, which you should m is the slope b is the y intercept both of the equations above are in this format but it may help in i write them like this for you y=(3/1)x+0 interscts at the orign slope 3/1 (rise over run)line will slant like th...

**Math**

once you have the dimensions of the other pool set up the equation like this big pool width/big pool length=625/x for example purposes let the above equal this w/l=625/x to solve l(625)=w(x) l(625)/w=x

**Intermediate Algebra**

because you are square rooting a negative your answer will be a complex (imaginary) number. if you haven't dealt with these yet answer the question /not possible/ If you still want an answer square root 24 then write a lowercase i after it. the i must be lowercase 4.898979...

**grade 11 math**

in order to break even he would have to produce -o.3x^2+3x-15 factor use quadratic formula you get two answers 5+the square root of 27 5-the square root of 27 because the second answer gives you a negative (you cant produce a negative amount of product) use the first one 10.19...

**physics**

A body is suspended vertically from an ideal spring of spring constant 3.4 N/m. The spring is initially in its relaxed position. The body is then released and oscillates about its equilibrium position. The motion is described by the following equation.

**math**

10x^2+5 y^2-2xy-28x-6y+41=0 and 3x^2-2y^2+5xy-17x-6y+20

**math**

the distance x cm and y cm are related by the eqt. 1/x+1/y=1/9, if x is increasing at a rate of 8 cm/s, calculate the rate at which y is changing when x=15. [ans:-18]

**English**

Can someone help please: What are 2 events that ended the Progressive era?

**physics**

hmm sum1 has the same ? as me?

**physics**

A bullet of mass 10.8 g leaves a gun barrel with a velocity of 511 m/s. What is the bullet's kinetic energy? answer in joules

**Finance Homework/ Have 2nd Part Need Calculate1st**

An investment will pay $100 at the end of each of the next 3 years, $400 at the end of Year 4, $600 at the end of Year 5, and $700 at the end of Year 6. If other investments of equal risk earn 8% annually, what is its present value? What is its future value? Round your answer ...

**geography**

describe the varius type of forest vegetation. give good example describing the location and type of plants.

**english**

To no man does the earth mean so much as to the soldier. what type of rhetorical device does this sentece contain

**english**

in tjaden this is a voracity, in Muller it is a foresight. what type of rhetorical device does this sentence contain?

**Chemistry**

If 18.0g of CO2 is produced in the reaction of C2H2 with O2 to form CO2 and H2O how many grams of H2Oare produced

**Chemistry**

A small laboratory burner consisting of a vertical metal tube connected to a gas source and producing a very hot flame from a mixture of gas and air let in through adjustable holes at the base. It is mainly used to heat chemicals.

**Physics**

0.064

**math**

a coast guar ship left a port at 30 mph. four hours later a helicopter was dispatched at 90 mph to intercept the ship. how long will it take the helicopter to catch the ship?

**Stats**

Observations are taken on sales of a certain mountain bike in 30 sporting goods stores. The regression model was Y = total sales (thousands of dollars), X1 = display floor space (square meters), X2 = competitors’ advertising expenditures (thousands of dollars), X3 = adver...

**1th phyics**

use the equation v=v0+at substitute the numbers in to find t

**sentences please help**

sorry the 2nd one is is botanist

**sentences please help**

whats a sentence for rivals, otanist, nurient.

**world history**

Who was the George Washington of South America?

**8th grade**

how do we learn./

**science**

What is the definition of organic compound?

**gr 11 physics**

as a rocket carrying a space probe acceleraes away from earth the fuel is being used up and the rocket's mass becomes less when teh mass of a rocket(and its fuel) is M and the distance of teh rocket from eart's centre is 1.5rE, the force of gravitational attraction bet...

**science**

I am in the p-block of the Periodic Table. My melting point is the highest in my period (ignore tansition metals). I am not the smallest atom in my group. My first ionization energy is greater than that of germanium. What element am I?

**science**

I am a main group element. I have 3 p-orbital electrons in my valence shell. I have a lower first ionization energy than arsenic. I am not the largest atom in my group. What element am I?

**science**

I am a metal. I am a transition metal. I have the smallest atomic radius in my group. I have 6 valence electrons. What element am I?

**Science**

I am a non-metal. I belong to the Halogen family. I am not the largest or smallest atom in my group. My first ionization energy is greater than that of iodine. I am not a gas at room temperature. What element am I?

**econ**

(a) The price level increased. (b) The number of new homes built decreased. (c) Inventories increased. (d) Imports increased.

**econ**

Which of the following could explain the increase in real GDP in 2001? (a) The price level increased. (b) The number of new homes built decreased. (c) Inventories increased. (d) Imports increased.

**econ**

Real GDP equaled $9,191 billion in 2000 and $9,215 billion in 2001. Both figures are adjusted for changes in the value of the dollar using a chained price index with a base year of 1996. Which of the following could explain the increase in real GDP in 2001? A. The price level ...

**history**

Who are Frances current Allies & Enemies?

**9th grade**

How do you calculate the thermal amplitude

**chemisty**

1.43,1.27

**algebra**

Thanks Emily Teacher!

**algebra**

how do i figure this out step by step? 3x-7=5x+13

**history**

why did the earliest attempts of the English to colonize america fail

**US**

Which of the following contributed most to the development of religious toleration in the British colonies? (A) The stand of Roger Williams in defense of liberty of conscience (B) The Puritan guarantee of religious freedom to settlers in the Massachusetts Bay colony (C) The co...

**Chemistry**

A silver-copper alloy had a mass of 0.1264g. When the alloy was dissolved in nitric acid and the silver precipitated as silver chloride, the precipitate had a mass of 0.1375g. Calculate the percent of silver in the alloy. So, how would you do this? Is it possible to use moles ...