# Posts by Sandy

Total # Posts: 816

**science**

what scientic evidence would you need to seettle the claim that famines are caused more by human than enviromental

*July 4, 2011*

**Chemistry**

A buffer solution is prepared by dissolving 0.400 mol of CH3COOH and 0.200 mol of CH3COONa in 1.00 L of water. 1.00 mL of 10.0 M HCl is added to a 100 mL portion of this solution. What is the final pH of the resulting solution? Ka of CH3COOH = 1.8 x 10¯5

*June 26, 2011*

**Business Math**

Cassandra is repaying an installment loan of $3,500 with 20 equal monthly payments of $196 each. what is the annual percentage rate of the loan?

*June 19, 2011*

**Mathematics for business and Finance**

The Patel family recently purchased a home, taking out a mortgage of $235,000 at 8 1/2% for 25 years. Excluding taxes and insurance, what is the monthly PITI payment of their loan?

*May 27, 2011*

**Chemistry**

HC2H3O2 + CH3(CH2)4OH (H2SO4)=?

*May 8, 2011*

**Physical science**

how can i calculate the number of: 1.molecules in 30g water.2.atoms in 50 dm^3 nitrogen gas.3.nucleons in 10 cm^3 flourine gas?

*May 7, 2011*

**Math(Probability)**

Let X and Y equal the outcomes when two fair six-sided dice are rolled. Let W = X + Y. Assuming independence, find the p.m.f. of W when (a) The first die has three faces numbered 0 and three faces numbered 2, and the second die has its faces numbered 0, 1, 4, 5, 8, and 9. (b...

*April 27, 2011*

**please help` ORGANIC**

synthesize olivetol from benzene

*April 27, 2011*

**science**

how do you make 5-Pentyl-1,3-benzenediol from just benzene? 1.Benzene + Br2 +FeBr3-->Benzene-Br??

*April 26, 2011*

**Physics**

15 cm in front

*April 25, 2011*

**HSM 220 Week 6 Budget Matrix**

Yes you are absolutely correct!

*April 20, 2011*

**Environmental Science**

I have been studying for several hours and am having problems with finding the answer to this question. Can anyone help please? Conservationists argue that watershed protection and other ecological functions of forget are more economically valuable than timber. Timber ...

*April 18, 2011*

**math/algebra**

please show me the mathimatical equation so I can set this up properly: The area of a rectangular patio is 54 sq ft. Find the length and width of the patio (Hint: A=lw)

*April 14, 2011*

**physics**

if you have an element that starts out at 40g and has a half-life of 10 days, you keep it for 30 days- how much doe you end up with? .

*April 7, 2011*

**AP Calculus**

integrate |sint(t^2)| dt with 0<t<3

*April 6, 2011*

**math**

A gun is fired from a bunker of 2m deep with an initial velocity of 500m/s at an angle of pi/6 a) Find the parametric equations of the position of the projectile b) Find the range of the projectile to the nearest meter. c) Find the maximum height of the projectile to the ...

*March 17, 2011*

**statistics**

A 99% confidence interval for population variance is being formulated based on a sample of 16 observations. What are appropriate values for X^2

*March 13, 2011*

**Maths - check please**

if boston is 14 feet above sea level and the ice cap is 680,000 cubic miles of water what impact would boston have?

*March 13, 2011*

**AP Calculus**

An object moves along the x-axis with a velocity of v(t) = sin(pi/3)t for time t greater than or equal to 0. What is the total distance traveled by the object over the time interval 0 less than or equal to t less than or equal to 4?

*March 9, 2011*

**Geometry**

The vertices of ∆GHJ are G(-2,3), and J(1,3). If ∆KLM ≅ ∆GHJ, fing LM.

*March 8, 2011*

**geometry**

what is true about the slopes of two perpendicular lines niether of which is vertical?

*March 8, 2011*

**geometry**

If a triangle side lengths of 12 cm, 35 cm, and 37 cm, what type of angle is it?

*March 8, 2011*

**Bio Medical Science**

What are the differences and similarities of the social structure and family values of persons from Bosnia and persons from Poland?

*February 26, 2011*

**Social Studies**

What are the differences and similarities of the social structure and family values of persons from Bosnia and persons from Poland?

*February 25, 2011*

**physical science**

A student is traveling in a car with a constant velocity has a kinetic energy 1.0 x 10^4 J. What is the speedometer reading of the car in km/h.

*February 20, 2011*

**trig**

From two points each on the opposite sides of a river,the angles of elevations of the top of an 80ft. tree are 60 degree & 30 degree.the points & the tree are in the same straight line,which is perpendicular to the river.how wide is the river?

*February 17, 2011*

**poetry**

whats the meaning of the poem SOMEWHERE TO PARIS BY RICHARD BLANCO?

*February 8, 2011*

**AP Calculus**

Suppose that f(0) = 4 and f'(x)< or equal to 2 for x>0. Apply the MVT to the interval [0 , 3] to prove that f(3) < or equal to 10

*February 8, 2011*

**AP Calculus**

Determine the critical numbers for y=sq root of (x^2 - 2x -15)

*February 8, 2011*

**AP Calculus**

Locate the absolute extrema for f(x) = 3/x-1

*February 8, 2011*

**AP Calculus**

Determine whether Rolle's Theorem is valid f(x) = 3 - |x - 2| for [-1, 5] if so, find c. if not, tell why.

*February 7, 2011*

**math**

The masses of newborn children are normally distributed with a mean of 3.4 kg and a standard deviation of 0.8 kg. A newborn is at risk if the baby'd mass falls in the lowest 4%. These babies have a mass of less than ____?

*January 26, 2011*

**math**

A bag contains 3 red, 5 black and 5 blue marbles. Four marbles are selected at random without replacement: - the probability that all 4 are black? -the probability that exactly two are blue and none are red?

*January 25, 2011*

**PHYSICS**

WHAT IS MAGNITUDE OF NORMAL FORCE IN FIGURE WITH V=+3M/S +10n INSIDE BOX IS 5KG

*January 19, 2011*

**PHYSICS**

WHAT IS MAGNITUDE OF NORMAL FORCE IN FIGURE WITH V=+3M/S +10n INSIDE BOX IS 5KG

*January 19, 2011*

**Finance**

Blue Moon Corporation has one million shares of common stock outstanding. In a typical annual election for the board of directors, shareholders representing 70 percent of the shares outstanding exercise their right to vote. The company has nine members on it board of directors...

*January 10, 2011*

**Finance**

The following stock quotation were recently reported in The Wall Street Journal: 10.3 AT&T T 3.6 21 39.43 0.26 0.1 Boeing BA 1.6 31 88.91 -0.85 -8.7 JohnsJohns JNJ 2.5 16 60.26 -0.08 a. What are the dividend yields on the common stock of AT&T Boeing, and Johnson & Johnson? b. ...

*January 10, 2011*

**Finance**

Hooks Athletics, Inc., has outstanding a preferred stock with a par value of $30 that pays a dividend of $2.50. The preferred stock is redeemable at the option of the stockholder in 10 years at a price equal to $30. The stock may be called for redemption by the company in 15 ...

*January 10, 2011*

**Finance**

Determine the value of a share of DuPont Series A $4.50 cumulative preferred stock, no par, to an investor who requies a 9 percent rate of return on this security. The issue is callable at $120 per share plus accrued dividens. However, the issue is not expected to be called at...

*January 10, 2011*

**calculus**

A particle moves along a horizontal line such that its position s(t) = (t^2e^3t/3)for time t. Find when the particle is at rest.

*January 3, 2011*

**Finance**

What factors limit the use of the fixed-asset turnover ratio in comparative analyses?

*December 15, 2010*

**Finance**

What problems may be indicated by an inventory turnover ratio that is substantially above or below the industry average?

*December 15, 2010*

**Finance**

What problems may be indicated by an average collection period that is substantially above or below the industry average?

*December 15, 2010*

**Finance**

what is the major limitation of the current ratio as a measure of a firm's liquidity? How may this limitation be overcome?

*December 15, 2010*

**AP Calculus**

If the linearization of y= cube root of x at x=64 is used to approximate cube root of 66, what is the percentage error? a) .01% b).04% c).4% d)1% e)4%

*December 14, 2010*

**chem**

For number 2 you just have to make a graph of ln(t) in your x axis and 1-T as your y-axis where the T is temperature in Kelvins. You could get a "linear" equation from the graph (y=mx+b) so you take the M and set it eqaul to (Ea)/R....and R is 8.314jouls/mole.K and ...

*December 8, 2010*

**7th grade**

Sandy works at a clothing store. She makes $8 per hour plus earns 10% commission on her sales. She worked 74 hours over the last two weeks and had a total of $1,580 in sales before taxes.

*December 7, 2010*

**Chemistry**

what is the outer energy level for beryllium?

*November 30, 2010*

**Chemistry**

how does the outer energy level relate to the ionization energy?

*November 30, 2010*

**Chemistry**

How does the outer energy level(period)relate to the atomic radius?

*November 30, 2010*

**math**

Sorry guys, new to this and just realized i posted in the wrong place :(

*November 12, 2010*

**math**

My son is doing expanded algorithm and the problem is 23 x17 the problem is there are cubes underneath the problem for him to fill in but ive tried every way I can think of to solve this problem and the answer just doesnt fit into these cubes, any suggestion?

*November 12, 2010*

**8th grade**

15 is the answer and I have a question "if a is not equal to 0, find the intercepts of the graph of y=ax+b in terms of a and b?"

*November 4, 2010*

**Science :)**

A football is kicked from the ground at 27 m/s at an angle of 42 degrees above the horizontal (ground). No one gets in the way until after it hits the ground. Use the value g=9.8 m/s^2. Assuming that the ground is level and that there is negligible air resistance, wind, etc. a...

*October 28, 2010*

**Physics**

A football is kicked from the ground at 27 m/s at an angle of 42 degrees above the horizontal (ground). No one gets in the way until after it hits the ground. Use the value g=9.8 m/s^2. Assuming that the ground is level and that there is negligible air resistance, wind, etc. a...

*October 27, 2010*

**Physics**

A football is kicked from the ground at 27 m/s at an angle of 42 degrees above the horizontal (ground). No one gets in the way until after it hits the ground. Use the value g=9.8 m/s^2. Assuming that the ground is level and that there is negligible air resistance, wind, etc. a...

*October 27, 2010*

**physics**

4. An ice skater pulls three small children, one behind the other, with masses 25kg, 31 kg and 35kg. Assume that the ice is smooth enough to be considered frictionless, determine: a) the total force applied to the train of children if they reach a speed of 3.5m/s from rest in ...

*October 24, 2010*

**calculus**

Evaluate the limit lim sin4x/tan9x x-> 0

*October 21, 2010*

**calculus**

Let f(x)=4cos^5x. Find f'(x)

*October 21, 2010*

**calculus**

If f(x)=(x^2+3x+2)^3, find f'(x).

*October 21, 2010*

**calculas**

the answer is not correct. I input f'= 1/2 (7t^-5)^-1/2 * (-5*7t^-6)and its incorrect. Did I input the wrong answer?

*October 21, 2010*

**calculas**

If f(t) = square root of 7/t^5. Find f'(x) and f'(2)

*October 21, 2010*

**calculas**

i did however my answer is still wrong. can you show me step by step. this way i can see what i am doing wrong. thank you

*October 21, 2010*

**calculas**

If a ball is thrown vertically upward from the roof of 48 foot building with a velocity of 80 ft/sec, its height after t seconds is s(t)=48+80t–16t2. What is the maximum height the ball reaches? (my answer is 148). What is the velocity of the ball when it hits the ground...

*October 21, 2010*

**math**

thank you

*October 21, 2010*

**algebra**

33x+38x=284 71x=284 71x/71=284/71 x=284/71 x=4

*October 17, 2010*

**Finance**

Your best taxable investment opportunity has an EAR of 4%. You best tax free investment opportunity has an EAR of 3%. If your tax rate is 30%, which opportunity provides the higher after tax interest rate?

*October 13, 2010*

**MEDICAL BILLING/CODING**

DO ANYONE HAVE THE LAYOUT FOR INTERPERSONAL COMMUNICATION GRADED PROJECT I AM STUCK NEED IDEAS

*October 9, 2010*

**Social Studies**

1-a,2-d,3-b,4-c,5-e

*October 7, 2010*

**english**

Please correct the following sentence for a daily oral language question: we will see a play called cinderella on tuesday I do not agree with how it was graded.

*October 5, 2010*

**chem**

Determine whether a solid forms when solution containing the following salts are mixed. If so, write the ionic equation and the net ionic equation. a) NA3PO4 and AgNO3 B) K2SO4 and K2S c) Pb(NO3)2 and Na2CO3 D) BaCl2 and KOH Share: by email on facebook on twitter

*October 3, 2010*

**Physics**

Two rocks are thrown off the edge of a cliff that is 15.0 m above the ground. The first rock is thrown upward, at a velocity of +12.0 m/s. The second is thrown downward, at a velocity of −12.0 m/s. Ignore air resistance. Determine (a) how long it takes the first rock to ...

*September 12, 2010*

**algebra2**

How to put this in a quadratic equation ax squared + bx + c = 0

*September 8, 2010*

**Calculus**

The population of fish in a lake before mating season is F. During the mating season, the population grows by 30% and the new population is N. Write an expression for N is terms of F.

*September 7, 2010*

**algebra**

2x-5(X+3)> -20

*August 25, 2010*

**algebra**

2x-5(x=3)>-20

*August 25, 2010*

**Biology**

When the electron moves back to lower energy levels in an electron transport chain, energy is a) stored or b) released c)converted to matter d)used to make O2 I'm not sure how to answer this cause isn't it stored as potential energy of H20 and just before the electron ...

*August 11, 2010*

**chemistry**

Compare the chemical composition of methane and ethanol to carbon dioxide. Which one can be said to be the complete oxidation of glucose? I thought is was methane but I got it wrong can you explain please.

*August 4, 2010*

**psychology**

Sexually active undergraduate women who do not consistently use contraceptives see themselves as less vulnerable to unwanted pregnancy than do other undergraduate women.This best illustrates A: the tyranny of choice B: emotion-focused coping C: the Type A personality D; ...

*July 25, 2010*

**psychology**

Watching the news on TV Mr.Velazco sees pictures of starving children in Africa.That morning he had read about the problem of world hunger.The TV images had a greater impact on him because of: A: belief perserverance B: emotional intelligence C:confirmation bias D: the ...

*July 25, 2010*

**math**

solve for unknown: log9 r=3/2 logG 2=1/3 Can you show me the steps how to solve this problems.Thank yo very much for your time

*July 18, 2010*

**math 116 appendix e**

4. The line y=0.15x +0.79 represents an estimate of the average cost of gasoline each year. The line 0.11x-y=0.85 estimates the price of gasoline in January of each year (“Consumer price index,” 2006). a. Do you expect the lines to be intersecting, parallel, or ...

*July 15, 2010*

**math116 appendix e**

4. The line represents an estimate of the average cost of gasoline each year. The line estimates the price of gasoline in January of each year (“Consumer price index,” 2006). a. Do you expect the lines to be intersecting, parallel, or perpendicular? Explain your ...

*July 15, 2010*

**algebra**

b. You will use 25% of your budget of 118,250.00 to rent business space and pay for utilities. Write an algebraic expression that indicates how much money will be spent on business space and utilities

*July 11, 2010*

**business law**

There is no question that Ruthâ€™s actions breached the duty of reasonable care necessary to park a car on the hill. Furthermore, there is little doubt that Jim has been injured by a roof falling on him and not through his own negligence. Therefore, Jimâ...

*July 6, 2010*

**trig**

okay i think that is right. thank you

*June 6, 2010*

**trig**

no, its not squared. it is (cosx)(2)

*June 6, 2010*

**trig**

solve for x if x is in radians. cos2(x) + 4cos(x) = -3

*June 6, 2010*

**trig**

find the exact value by using the appropriate half-angle identity: sin(5pi/12)

*June 6, 2010*

**algebra**

*verify that it is an identity

*June 6, 2010*

**algebra**

sin(270 degrees - theta) = -cos(theta)

*June 6, 2010*

**Physics**

In both cases an applied force of 100N accelerates block A which weighs 100N. In which case is this acceleration greater?

*June 6, 2010*

**algebra**

make up situation that can be described in algebra with each expression for 5x, and for x-10, and also 2x+3

*May 19, 2010*

**algebra**

a. p(4000-p) b. 40000-10=39,990 c. 10(39990)=399,900

*April 26, 2010*

**geometry**

a pie shaped property is 650.00'X488.00'X405.00', what is the amount of acreage? thanks for the help.

*April 19, 2010*

**Pre Algebra**

Write an equation to find the value of X if the perimeter of a triangle =36. AC=x-2, BC=x, AB is unknown.

*April 19, 2010*

**math**

Sorry I know this was 5 years ago, but did you by any chance gets the answer? I have this question right now

*April 15, 2010*

**math**

Imagine a small chess board, 3 x 3. If you place a knight on the top left hand corner, how many different squares can the knight reach in less than 4 moves?

*April 8, 2010*

**programming**

I am in IT/210 and am having problems with the entire class. But what I am stuck on is as follows: Consider the following statement where X is an integer test score between 0 and 100. input X if (<0=X and X<49) output = "you fail" else if (50 <=X and X < ...

*April 7, 2010*