Thursday

September 3, 2015
Total # Posts: 165

**Statistics**

Coin box Question: Assume that there are 25 pennies, 10 nickels, 10 dimes, and 5 quarters in a box. after shuffeling the box, you pick a coin at random and note down its face value. let x represent the face value of the coin in cents. then construct the probability ...
*November 2, 2009*

**Stat**

Coin box Question: Assume that there are 25 pennies, 10 nickels, 10 dimes, and 5 quarters in a box. after shuffeling the box, you pick a coin at random and note down its face value. let x represent the face value of the coin in cents. then construct the probability ...
*November 2, 2009*

**physics**

The distance from an observer on the plain to the top of a nearby mountain is 5.3km, and the angle between this line and the horizontal is 8.4 degrees. How tall is the mountain?
*November 1, 2009*

**Algebra**

You're right, it is 2x^2.
*October 5, 2009*

**Algebra**

69: 16x^2+8x-3. I inserted this into the quadratic formula and got -8+/- the square root of (8^2-4(16)(-3)/(2 times 16). This reduced to -8+/- the square root of (64+120)/32, which further reduced to -8+/-the square root of 184/32. I reduced the top part to -8 +/- the square ...
*October 4, 2009*

**math**

identifying domain and range
*September 29, 2009*

**Physics**

A fire helicopter carries a 679 kg bucket of water at the end of a 15.2 m long cable. Flying back from a fire at a constant speed of 42.5 m/s, the cable makes an angle of 49.0o with respect to the vertical. Determine the force of air resistance on the bucket.
*September 22, 2009*

**Physics**

Your groceries are in a bag with paper handles. The handles will tear off if a force greater than 50.8 N is applied to them. What is the greatest mass of groceries that can be lifted safely with this bag, given that the bag is raised with constant speed.
*September 22, 2009*

**Chem**

You've just prepared a solution by transferring 20.0 g of glucose into a 1.0 - L volumetric flask, and adding water to the mark. Calculate the concentration of the glucose solution in terms of millimoles/Liter, mg/mL, and % (m/v). Ok, I think i'm overwhelmed by the ...
*September 7, 2009*

**Chem**

You've just prepared a solution by transferring 20.0 g of glucose into a 1.0 - L volumetric flask, and adding water to the mark. Calculate the concentration of the glucose solution in terms of millimoles/Liter, mg/mL, and % (m/v).
*September 1, 2009*

**math**

I need help with finding function that appears in newspaper, and what is the domain and range of each. My question is what i'm i suppose to look for in the newspaper a article?
*August 13, 2009*

**Sci.**

if you're trying to extract a metal from its ore, would you use reduction, oxidation, melting or casting? Thanks for your help.
*April 20, 2009*

**Math**

how do you solve this I keep trying and I keep getting the wrong answer. I keep getting x=19000 and that is not correct .10=.9(x/15000)+.14[(1-x)/15000]
*April 19, 2009*

**Algebra**

what if I change the 1-x to a y? how do you solve for 2 variables?
*April 17, 2009*

**Algebra**

how do i solve this? .10=.9(x/15000)+.14(1-x/15000)
*April 17, 2009*

**Basic Algebra**

How do I solve for .10=.9x + .14(1-x) I keep getting x/(1-x) and I don;t know how to do that. Any help would be appreciated
*April 16, 2009*

**Algebra**

How do I solve for .10=.9x + .14(1-x) I keep getting x/(1-x) and I don;t know how to do that. Any help would be appreciated
*April 16, 2009*

**Microbiology**

What kind of prokaryotes have been discovered, which can grow as large as 70 milimeters in diameter and can be without the aid of a microscope (Hint: It's in the ocean)?
*January 21, 2009*

**algebra**

write the slope of a line parallel to the given line y=8-3x
*December 5, 2008*

**Statistics**

Does the t distribution have a mean of zero, or is it a continuous distribution?
*November 24, 2008*

**english 3 honors**

what are subordinate, adverb, adjective, and noun clauses?
*November 18, 2008*

**english**

because the person you record could be hiding from some one in the witness protection plan and they could be found. thats just the first idea that came to mind.
*November 18, 2008*

**punctuation**

The question we need to ask ourselves is (comma) (no punctuation ) "Do we really want to move ahead? (quotation mark only)(quotation mark followed by a period )
*November 4, 2008*

**english**

what is the moodd which the author creates in the upturned face
*October 3, 2008*

**10th grade math**

X=4
*September 6, 2008*

**chemistry**

i have the same ? ughhh did you get any of the problem yet.
*March 23, 2008*

**Chemistry**

In a certain experiment a sample of Helium in a vacuum system was compressed at 25 degrees C from a volume of 200.0 mL to a volume of 0.240 mL where its pressure was found to be 30.0 mm Hg. What was the orginal pressure of the Helium?
*February 14, 2008*

**Economics**

I have to draw some Supply/demand curves and I want to know if they are right Personal computers: more user-friendly software become available and the costs of inputs are reduced. Supply moves to the right, demand moves to the left, quantity goes up and so does price Hospital ...
*February 11, 2008*

**Graphs**

The Frivoli can produce either 30 pounds of spaghetti and no meatballs or 50 pounds of meatballs and no spaghetti or any combination in between. The Frivoli can produce 40 pounds of spaghetti and no meatballs or 30 pounds of meatballs and no spaghetti. Assuming all production ...
*January 30, 2008*

**Economics**

How does increasing or decreasing the quantity of capital goods produced this period affect next period's production possibilities curve and why? The only thing I can think of is that if more products are produced this period, less can be produced next period because their...
*January 30, 2008*

**Economics**

How does increasing or decreasing the quantity of capital goods produced this period affect next period's production possibilities curve and why? The only thing I can think of is that if more products are produced this period, less can be produced next period because their...
*January 30, 2008*

**Significant Figures**

so this is right, each number can only have two digits for f. should it be 10 or 10.
*January 27, 2008*

**Significant Figures**

Report the following to two significant figures a. 3.1459 b. 6.003 c. 42 d. 6.0233 x 10^23 e. 14.456 + 3.87 f. 9.9999995 - 0.0108 g. 67.3 x 6.667 h. 4.93 / 3.946 Can someone please check my answers a. 3.1 b. 6.0 c. 42 d. 6.0 x 10^23 e. 18 f. 10. g. 4.5 x 10^2 h. 1.2
*January 27, 2008*

**Significant Figures**

these are my answers could someone check them for me
*January 27, 2008*

**Significant Figures**

okay a. 3.1 b. 6.0 c. 42 d. 6.0 x 10^23 e. 18 f. 10. g. 4.5 x 10^2 h. 1.2
*January 27, 2008*

**Significant Figures**

Report the following to two significant figures a. 3.1459 b. 6.003 c. 42 d. 6.0233 x 10^23 e. 14.456 + 3.87 f. 9.9999995 - 0.0108 g. 67.3 x 6.667 h. 4.93 / 3.946
*January 27, 2008*

**Rounding**

Round to two decimal places a. 3.1459 b. 6.003 c. 42 d. 6.0233 x 10^23 e. 14.456 + 3.87 f. 9.9999995 - 0.0108 g. 67.3 x 6.667 h. 4.93 / 3.946 check my answers please a. 3.15 b. 6.00 c. 42 d. 6.02 x 10^23 e. 18.33 f. 9.99 g. 448.69 h. 1.25
*January 27, 2008*

**s.s**

do u know any good websites for kids that have a step by step instructions on how to make something...in greek art...that sounds realy confusing srry but try to understand
*January 5, 2008*

**Calc**

For f(x,y)=x^2+y^2-xy+6y, determine the values for x and y such that fx(x,y)=0 and fy(x,y)=0 simultaneously.
*December 9, 2007*

**Calc**

Classify all critical points of the function f(x,y)=x^2-y^2+4x-2y+1. I know I have to take the partial derivative and set them equal to zero to get my points and then use the Hessian. For some reason I am not getting the correct answer. partial d/dx 2x+4 and partial d/dy 2y-2 ...
*December 9, 2007*

**Calc**

Ralph is taking his final exam. After t minutes into the exam Ralph has correctly solved P(t)=-.001t^3+.078t^2+.16t problems. a) at what time was Ralph solving problems most efficiently? b) at what time did Ralph's efficiency decline?
*December 9, 2007*

**Calc**

No i need help understanding the algebra behind solving 2x+4/x=6
*December 9, 2007*

**Calc**

I understand what you are saying but how do you do the algebra foe 6=2x+4/x I seem to have forgotten my algebra.
*December 9, 2007*

**Calc**

how do I do this?
*December 9, 2007*

**Calc**

Find the equation of a tangent line of a graph pf y=x^2+4lnx, which is parallel to y=6x-3? I know parallel lines have the same slope so the slope is 6 but I do not know how to find the b value.
*December 9, 2007*

**Calc**

How do you take the derivative of 9000/(1+.3t+.1t^2)?
*December 9, 2007*

**Calculus**

I mean how you got it? Your explanation is very confusing
*December 9, 2007*

**Calculus**

Well can you make it easier to understand how you got it?
*December 9, 2007*

**Calculus**

I do not want the limit i just need the derivative so I can set it equal to 15
*December 9, 2007*

**Calculus**

What is the derivative of t^3/3
*December 9, 2007*

**Calculus**

solve the equation for y in terms of x. Can somebody walk me through this?
*December 9, 2007*

**Calculus**

How do you factor the (x-2) opt, I do not understand the steps to do this?
*December 9, 2007*

**Calculus**

Given the function f(x) = (x-2)/(x^3-8), what value should be assigned to f(x) to make the function continuous at x=2? Please walk me through this. I have the answer but do not know how to get it.
*December 9, 2007*

**CALC**

What are local extrema?
*December 9, 2007*

**Calc**

How do you factor -2x^2+60x-120. I got -2(x^2-30x+60) but I need to factor it further.
*December 8, 2007*

**Cal**

Find the equation of the line containing (7,11) and parallel to y=6. Find the equation of the line having x-intercept of 5 and y-intercept of -5. I know that y=mx+b, b=y-mx, and parallel lines have the same slope
*December 8, 2007*

**Calculus**

Find the derivative. Simplify as much as possible. s(x)=(9-12x)/[(x/3)-(1/4)] Can someone explain this to me
*November 14, 2007*

**Calculus**

Minimize S=x+2y with xy=2 and both x and y > 0. Can somebody explain to me in words and numbers how to do this problem.
*November 13, 2007*

**Calculus**

Minimize S=x+2y with xy=2 and both x and y > 0
*November 12, 2007*

**Calculus**

Find the limit. Use L'Hopitals Rule if necessary. lim (x^2+3x+2)/(x^2+x) x -> 0
*November 12, 2007*

**Calculus**

Find the derivative. Simplify as much as possible. s(x)=(9-12x)/[(x/3)-(1/4)]
*November 12, 2007*

**history**

What motivated King Leopold of Belgium to seek ownership of the Congo region? Check this site. http://en.wikipedia.org/wiki/L%C3%A9opold_II_of_Belgium
*August 16, 2007*

**Algebra**

Can you explain to me how to solve this equation? 2/3x-9=1/3 1/3=.33 and 2/3=.66 now the problem is 0.66x-9=0.33 When I did this in math, I had trouble, but now I understand it. Since 0.33 is on the other side of the = then 9, you would do 0.33+9=9.33 In other words, you do ...
*December 6, 2006*

**psychology**

Anyone have the personal manifesto paper criteria? Paper is due on Wed. Thanx Since a manifesto is not my area of expertise, I searched Google under the key words "writing personal manifesto" to get this source: (Broken Link Removed) I hope this helps. Thanks for ...
*November 6, 2006*

**speed of rocket**

how fast does a rocket need to go to break earth's gravitationl pull The final rocket velocity required to maintain a circular orbit around the Earth may be computed from the following: Vc = sqrt(Âµ/r) where Vc is the circular orbital velocity in feet per ...
*August 25, 2005*