Friday

October 31, 2014

October 31, 2014

Total # Posts: 73,556

**Physics**

What do it mean to have a zero percent discrepancy?
*October 14, 2014*

**science**

When 90 kJ is removed from a 2-kg copper bar, its temperature drops from 200°C to 85°C. The specific heat of copper is
*October 14, 2014*

**physics**

a net force of 72 n is applied to a 48 kg box starting from rest for 8 s. what is the final velocity of the box?
*October 14, 2014*

**physics**

a 65 kg skateboarder is standing on a stationary .5 kg skateboard. the skateboarder steps off the skateboard with a horizontal veolicty of 1.5 m/s. what is the recoil velocity of the skateboard ignoring friction? I need help with set up.
*October 14, 2014*

**Algebra Answer Check**

(7x^3 + 2x - 1) + (8x^2 - 6 + 2x - x^3) Ans: 6x^3 + 8x^2 + 4x - 7
*October 14, 2014*

**complex numbers**

Reiny is correct for 2, I forgot to subtract 1 from 7 to get her answer. Sorry!! P.S. Go with Reiny, she is a tutor on this website, I was just trying to help though.
*October 14, 2014*

**complex numbers**

i know i mean how did you get it like how your answer so i can use it for my other questions.
*October 14, 2014*

**complex numbers**

thank you but can u show me how u got it?
*October 14, 2014*

**complex numbers**

1. I don't know 2. is -14 + 8i 3. is 2i+7-l I hope this helps! :)
*October 14, 2014*

**complex numbers**

1) 4b-5t(-a-3)i=7-8i 2) (7+4i) - (l+2i) 3) (3+2i) (-2+4i)
*October 14, 2014*

**Pre-Calc/Trig...**

Am i correct? A vertical shift is an example of a non-rigid transformation. True
*October 14, 2014*

**HISTORY**

Which of the following is not true about the Greek Bible? it contains 27 documents it’s a document from antiquity it is the only collection of documents produced by the early church it is the canonical Greek Bible of the churc
*October 14, 2014*

**drama**

The ability of writers to completely identify with their characters is A. hypocrisy. B. satire. C. negative capability. D. ambiguity.
*October 14, 2014*

**physics**

I really don't know how to explain it, so here is just the answers. "a. 0.47 m/s2 b. 480 N" I hope this helps! :)
*October 14, 2014*

**SS**

How do the conditions of Palliser's Triangle affect the people living there?
*October 14, 2014*

**Pre-Calc/Trig...**

am i correct? What is the axis of symmetry for the graph of y=2x^2-4x+2? x=? the line goes through 1? x=1
*October 14, 2014*

**Proves**

Two lines intersect to form angle 1 comma space angle 2 comma space angle 3 comma space a n d space angle 4. The measure of angle 3 is 3 times the measure of angle 1 and m angle 1 equal m angle 2. Find the measure of each angle. Label your answers.
*October 14, 2014*

**Pre-Calc/Trig...**

okay, thanks for the help! :)
*October 14, 2014*

**Pre-Calc/Trig...**

Am i correct? The graph of y=3x^2-4x+2 opens downwards. FALSE The graph of y=2x^2-4x+2 has a y-intercept of (0,1). FALSE
*October 14, 2014*

**statistics**

A population has a mean of 300 and a standard deviation of 50. Suppose a sample of size 125 is selected and is used to estimate . What is the probability that the sample mean will be within +/- 3 of the population mean (to 4 decimals)?
*October 14, 2014*

**algreba2**

-2(3y-6)+4(5y-8)=92
*October 14, 2014*

**english**

what is the meaning of the quote of marriane Williamson? Our Deepest fear
*October 14, 2014*

**MATHS**

Evaluate the following expression using BODMAS rule (90/3*3+5)/(-2*3+9)
*October 14, 2014*

**physics**

A rescue plane wants to drop supplies to isolated mountain climbers on a rocky ridge 235 m below. The horizontal velocity of the plane is 250 km/h (69.4 m/s). Rescue plane releases the supplies a horizontal distance of 425 m in advance of the mountain climbers
*October 14, 2014*

**PYSICS**

Suppose a vector \(\vec V\) makes an angle \(\phi\) with respect to the \(y\) axis.
*October 14, 2014*

**physics**

a fire hose held near the ground shoots water at a speed of 6.4m/s, at what angle should
*October 14, 2014*

**finance **

If interest rates increase after a bond issue, what will happen to the bond’s price and yield-to-maturity
*October 13, 2014*

**Math**

In a polynomial like 5x^5 + 4x^2 + 2, is 2 counted as a term?
*October 13, 2014*

**Ed. tech HELP!!!**

That's what I said; the answer is not C.
*October 13, 2014*

**Ed. tech HELP!!!**

Actually no thank you the answer was A not C!
*October 13, 2014*

**Ed. tech HELP!!!**

Thank you
*October 13, 2014*

**Ed. tech HELP!!!**

Action buttons allow you to do things like restart a presentation, go to the last slide, link to another slide, etc.
*October 13, 2014*

**Ed. tech HELP!!!**

When viewing a presentation, words on slides may appear to fly in and out or dissolve. What makes text in a presentation do this? A. The addition of text animations B. The addition of slide transitions C. The addition of Action buttons D. The addition of clip art Is the answer...
*October 13, 2014*

**Math**

In a circuit, the voltage, V, is given by the formula V = IZ, where I is the current and Z is the impedance. Both the current and impedance are represented by complex numbers. Find the voltage if current is 3 + 2i and impedance is 4 - i.
*October 13, 2014*

**English 1**

Be is the verb.
*October 13, 2014*

**English 1**

Yes.
*October 13, 2014*

**Math**

According to the 2010 census data , the population of Texas was about 2.5*10^7 people. The land area of Texas is about 2.6*10^5 m^2. Divide the average number of people per square mile in 2010. A. 0.96*10^2 B. 9.6*10^1 C. 0.96*10^35 D. 9.6*10^12 Is the answer A?
*October 13, 2014*

**math**

Find two positive decimals a and b that make the following statement true. Then find two positive decimals a and b that make the statement false. If a < 1 and b < 1, then a ÷ b < 1.
*October 13, 2014*

**Math**

Which is irrational? A. 0.117117117... B. 0.8596873205... C. 0.812812812812... D. 0.605605605... Is the answer B?
*October 13, 2014*

**Math**

Thank you
*October 13, 2014*

**Math**

0.166666667 so the answer is B?
*October 13, 2014*

**Math**

Harold bought two loaves of raisin bread to share with his friends. If there are 12 people total, including Harold, how much bread does each person have? A. 0.06 B. 0.16 THE 6 keeps going on C. 0.25 D. 0.3 And the 3 keeps going on Is the answer C?
*October 13, 2014*

**Math**

Thank you sooo much
*October 13, 2014*

**Math**

I don't know how to do that if you could help me please.
*October 13, 2014*

**Math**

One nanometer is about 0.00000003937 of an inch. What is this number in scientific notation? A. 3.937*10^-8 B. 3.937*10^8 C. 39.37*10^-7 D. 39.37*10^7 Is the answer A? Thanks
*October 13, 2014*

**sj hig**

If thats one of your answer choices
*October 13, 2014*

**sj hig**

-73.3
*October 13, 2014*

**Math**

Thank you soooo much
*October 13, 2014*

**Math**

1/6 so the answe is C?
*October 13, 2014*

**Math**

If there is 1/2 if a pizza and Jonas wants only 1/3 of it, how much of the pizza will he eat? A. 1/5 B. 2/5 C. 1/6 D. 2/6 Is the answer B? Thanks
*October 13, 2014*

**Pre-Calc/Trig...**

@reiny sorry for not replying last night i was tired and didn't realize anyone responded. for #1 i think it's false? #2 i think is false as well the answer will be 2 not 1. am i right?
*October 13, 2014*

**Pre-Calc/Trig...**

Stuck on these two questions, help me please. The graph of y=3x^2-4x+2 opens downwards. True or False? The graph of y=2x^2-4x+2 has a y-intercept of (0,1). True or False?
*October 13, 2014*

**Math**

What is 0.32 written as a fraction in simplest form/ A. 32/100 B. 8/25 C. 100/32 D. 16/25 Is the answer B? Thanks
*October 13, 2014*

**Math**

Divide. Write the answer in simplest form. 8 1/6 divided by 2 1/24. I got 4 5/6 is this right? If so what's the simplest form.
*October 13, 2014*

**Calc: Related Rates**

Jack and Jill are out walking around in a field. At noon, Jack is located 800 feet west of Jill. Jack walks east at the rate of 5 feet/sec. while Jill walks north at 4 feet/sec. How fast is the distance between them changing at 12:02 p.m.?
*October 13, 2014*

**chemistry/toxicology/instrumental analysis**

A standard curve was produced using absorbance values of prepared standards obtained by UV spectrophotometry. The standards were made using concentrated hydrochloric acid as opposed to the 1N HCl that the lab manual says should be used. Because of this my absorbance values are...
*October 13, 2014*

**Ed. tech HELP!!!**

Ok thank you I reread and I see your point
*October 13, 2014*

**Ed. tech HELP!!!**

Ok maybe A?
*October 13, 2014*

**Ed. tech HELP!!!**

Oh ok C?
*October 13, 2014*

**Ed. tech HELP!!!**

Adding transitions to slides in a presentation A. Offers effects when moving from one slide to the next. B. Adds animation to selected text and images. C. Adds a new slide to a presentation in Microsoft Powerpoint. D. Creates sound effects connected to an image. Is the answer ...
*October 13, 2014*

**physic**

A long jumper leaves the ground at an angle of 22.7◦ to the horizontal and at a speed of 9.47 m/s. How far does he jump? The acceleration due to gravity is 9.8 m/s2 . Answer in units of m
*October 13, 2014*

**Math123**

Question Part Points Submissions Used A stone is dropped into a lake, creating a circular ripple that travels outward at a speed of 40 cm/s. Find the rate at which the area within the circle is increasing after each of the following. (a) after 2 s cm2/s (b) after 5 s cm2/s (c...
*October 13, 2014*

**Math000**

The height (in meters) of a projectile shot vertically upward from a point 3 m above ground level with an initial velocity of 21.5 m/s is h = 3 + 21.5t − 4.9t2 after t seconds. (Round your answers to two decimal places.) (a) Find the velocity after 2 s and after 4 s. v(2...
*October 13, 2014*

**Math889**

Someone Help me with this
*October 13, 2014*

**Math889**

A particle moves according to a law of motion s = f(t), t ≥ 0, where t is measured in seconds and s in feet. f(t) = te−t/4 (a) Find the velocity at time t (in ft/s). v(t) = (b) What is the velocity after 1 s? (Round your answer to two decimal places.) v(1) = ft/s (...
*October 13, 2014*

**Ed. tech**

I didn't say it was for poweroint I just said a presentation
*October 13, 2014*

**Ed. tech**

When viewing a presentation, words on slides may appear to fly in and out or dissolve. What makes text in a presentation do this? A. The addition of text animations B. The addition of slide transitions C. The addition of Action buttons D. The addition of clip art Is the answer...
*October 13, 2014*

**math**

7x4-4 devided 2=26
*October 13, 2014*

**chemistry**

Are the characteristics or properties of the elements making up a compound different from the characteristics or properties of the compound? For example, are the properties of oxygen and hydrogen different from the properties of water? Explain.
*October 13, 2014*

**Calc**

2) A hot air balloon rising vertically is being tracked by an observer on the ground, located 60 meters from the take-off point. At a certain instant, the balloon is 30 meters above the ground and the angle of elevation (between the ground and the observer’s sight line) ...
*October 13, 2014*

**accounting**

Comparative Statements of Retained Earnings for Renn-Dever Corporation were reported as follows for the fiscal years ending December 31, 2011, 2012, and 2013.
*October 13, 2014*

**Math**

For each object, its surface area, and some dimensions are given. Calculate the dimension indicated by the variable to the nearest tenth of a unit. a) right cone SA=7012mm^2 GIVEN=diameter of 48mm b) right square pyramid SA=65.5m^2 GIVEN=length of 3.5m
*October 13, 2014*

**physics**

With friction turned on, set the initial velocity of the box to 1.75 m/s, the coefficient of friction to 0.60, and the mass to 1.5 kg. Assume the acceleration due to gravity has a magnitude of 9.8 m/s2.
*October 13, 2014*

**Ed Tech**

i think its c
*October 13, 2014*

**SS**

Thank you so much for all the help!
*October 13, 2014*

**SS**

"A naturally formed feature on the surface of the earth."
*October 13, 2014*

**SS**

Are deciduous and coniferous forests landforms?
*October 13, 2014*

**Ed Tech**

When you make a timeline, you put in important points about the chosen subject, which, in this case, is Fredrick Douglass.
*October 13, 2014*

**Earth science**

Im sure of all of them except the last one.
*October 13, 2014*

**Earth science**

Can you please correct me if I am wrong or let me know what you think Thanks Y-A 1. Trees keep water in a watershed from accumulating silt before it empties into river. (i got true) 2. Permeable means capable of absorbing water. (i got false) 3. Old rivers are characterized by...
*October 13, 2014*

**SS**

What is an example of a deciduous forest in the US?
*October 13, 2014*

**SS**

Is it appropriate to use cities being below and above sea level as landforms? I know cities are not landforms, but sea level is a natural feature, which is why I ask.
*October 13, 2014*

**us history**

The Northwest Territory included all or part of the following states except A. Indiana B. Illinois C. Kentucky D. Michigan E. Minnesota F. Missouri G. Ohio H. Wisconsin all expect missouri and kentucky right?
*October 13, 2014*

**SS**

Can a glacier and desert be contrasting landforms?
*October 13, 2014*

**us history**

Despite the outcome of the American Revolution, Britain still held a fort on American soil at A. New York B. Philadelphia C. Juneau D. Saint Augustine E. Santa Fe F. Seattle G. Detroit I'm not sure between Philadelphia or New York because I think that the British had about...
*October 13, 2014*

**us history**

True or False The first US president brought a tone of informality and simplicity to the office. this is false right?
*October 13, 2014*

**Physics**

While moving in, a new homeowner is pushing a box across the floor at a constant velocity. The coefficient of kinetic friction between the box and the floor is 0.27. The pushing force is directed downward at an angle θ below the horizontal. When θ is greater than a ...
*October 13, 2014*

**SS**

Can cities be considered landforms?
*October 13, 2014*

**SS**

Can a prairie be considered a landform?
*October 13, 2014*

**SS**

Can an island and a lake be contrasting landforms?
*October 13, 2014*

**chem **

if the precipitation of BaSO4 is incomplete due to improper heating and time what will happen to the percent error of sulfate?
*October 13, 2014*

**math**

a rectangular vegetable bed 10m long and 6m wide is edged on four sides with 2m wide border. find the area of the border
*October 13, 2014*

**Chem**

what mass of NaCl is contained in 24.88g of a 15% by mass solution of NaCl in water?
*October 13, 2014*

**CHEM**

calculate the molality of a solution formed by dissolving 27.8g of LiI in 500mL of water
*October 12, 2014*

**Finc 322**

Problem 7-17 Nonconstant Dividends [LO 1] Apocalyptica Corporation is expected to pay the following dividends over the next four years: $5.10, $16.10, $21.10, and $2.90. Afterwards, the company pledges to maintain a constant 5.25 percent growth rate in dividends, forever. ...
*October 12, 2014*

**statistics**

The Office of Student Services at a large western state university maintains information on the study habits of its full-time students. Their studies indicate that the mean amount of time undergraduate students study per week is 20 hours. The hours studied follows the normal ...
*October 12, 2014*

**statistics**

11. All probabilities can be expressed as decimal values ranging from 0 to 1.00.
*October 12, 2014*

**Algebra 2**

we are solving for h
*October 12, 2014*

**Algebra 2**

Please can you explain this problem to me. v = 1/3 π r^2 h Thank you in advance for your help
*October 12, 2014*

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