Questions Asked on
April 9, 2011

math
if asphalt costs $0.78 per square foot, determine, to the nearest cent, the cost of paving the shaded circular road with center O, an outside radius of 50 feet, and an inner radius of 36 feet. (the big circle is shaded)

Math
From an 8 inch by 10 inch rectangular sheet of paper, squares of equal size will be cut from each corner. The flaps will then be folded up to form an opentopped box. Find the maximum possible volume of the box.

chem check my answer
magnesium hydroxide + hydrobromic acid > is the formula for that Mg(OH)2(s) + HBr(aq) >H2O(l) +BrOH(s) and are the physical states correct??

math
Given that f(x) = 3x  2 and g(x) = 4x  1, find f (g(x».

physics
a stone is tied to the end of a string and is swung with a constant speed around a horizontal circle with a radius of 1.5m. if it makes two complete revolutions each second, what is the magnitude of its acceleration? i know the answer, but i don't know how

physics
An acorn and tree leaf fall from the same height and time. Which reaches the ground first and why?

physics
Two very long, straight, parallel wires carry currents that are directed perpendicular. Wire 1 carries a current I1 into the page (in the z direction) and passes through the x axis at x = +a. Wire 2 passes through the x axis at x = 2a and carries an

Trigonometry
a. Find the exact value of sin (theta  pi/6) b. Find the exact value of cos (theta  pi/4) c. For what numbers x, 2pi less than or equal to x less than or equal to 2pi does cos x = 1 d. What is the range of the cosine function? e. For what numbers x,

chemistry
what is the osmolarity of a 1.0M solution of ethyl alcohol (C2H6O) in water?

geometry
Find the value of the variable and KL if K is between J and L. Given: JK = 6x, KL = 2x, and JL = 24

Physics 203
A hollow, thinwalled cylinder and a solid sphere start from rest and roll without slipping down an inclined plane of length 5.0 m. The cylinder arrives at the bottom of the plane 2.7 s after the sphere. Determine the angle between the inclined plane and

statistics
A salesperson has found that the probability of making various numbers of sales per day is presented in the following table. Calculate the expected number of sales per day and the standard deviation of the number of sales. Number of sales(Probability)

physics modern
1. a) If a photon and an electron each have the same energy of 20.0 eV, find the wavelength of each. b) If a photon and an electron each have the same wavelength of 250 nm, find the energy of each. c) You want to study an organic molecule that is about 250

Math
What addition property can you use to find the missing number? 8+(6+5)=8+(5+_)

law
english law. what are the powers of the court of appeal.

Phyics help
I have a few physics questions: 1. How much mechanical work is done by a weightlifter holding a mass of 100 kg, 2.0m above the floor for 3.0 s? Explain ur answer. 2. Calculate the force needed to do 2.0 kJ of work to push a load of bricks 10m? 3. A

Physics urgent help have a test!!!
1. a little spider monkey named flo has stolen a bunch of bananas from her older brother Charley and is now running away frm him with the bananas in hand. She sees salvation in a long vine and grabs the bottom, hoping to swing away a) if she has a mass of

Physics: urgent help needed
i have a test on monday 1 A beach ball is thrown straight up with a speed of 10m/s from a point 2 m above the ground a) Assuming no air reistance, calculate how far up the ball will go b)At what speed will the ball eventually hit the ground? c) If the air

AP Physics
A long, straight wire carries a current of 740 mA. A thin metal rod 45 cm long is oriented perpendicular to the wire and moves with a speed of 1.8 m/s in a direction parallel to the wire. What are the size and direction of the emf induced in the rod if the

statistics
According to a survey 35% of adults are against using animals for research. Assume that this result holds true for the current population of all adullts. Let X be the number of adults who are against using animals for research in a random sample of 2

engineering
when i do imaging of tissue to look at collagen structure using a 2 photon microscopy, but im not familiarized with the methods to measure the diameter of the collagen and the area occupied by it. Does anyone know how do researchers measure them

Physics
please can u check my answer Here are the questions: 1. A 0.45 kg book is resting on a dessktop 0.64 m high. Calculate the book's potential energy relative to a)the desktop? b)the floor. 2. A 0.636 kg basketball has a potential energy of 19J at the basket.

Chemistry
The antacid Amphogel contains aluminum hydroxide Al(OH}3 How many milliliters of 2.00(M}HCl are required to react with 80.0 mL of 1.48 (M} Al(OH)3(s)? Al(OH)3(s)+ 3HCl(aq)to AlCl3(aq) + 3H2O(aq)

financial Managerial
The State of Idaho issued $2,000,000 of seven percent coupon, 20year semiannual payment, taxexempt bonds five years ago. The bonds had five years of call protection, but now the state can call the bonds if it chooses to do so. The call premium would be

Algebra
Mr. Petri has a rectangular plot of land with length=20 feet and width=10 feet. He wants to design a flower garden of o circle with two semicircles at each end of the center circle. he will fill in the shaded region with wood chips. if one bag of wood

XCOMM 285
Assignment: Tuition Reimbursement Implementation Report · Review the following scenario: Your company has had a very profitable year and is looking to expand their employee benefits. As an employee in the benefits department, you have been asked to

chemistry
when we make CH3MgCl,we have to calculate its MOLARITY.how!

physics
Suppose 0.0290 kg of steam (at 100.00°C) is added to 0.290 kg of water (initially at 19.7°C.). The water is inside an aluminum cup of mass 44.7 g. The cup is inside a perfectly insulated calorimetry container that prevents heat flow with the outside

physiology
Is the hormone protein,steroid or glycoprotein? 1. Folliclestimulating hormone 2. Cortisol 3. Antidiuretic hormone 4. Parathyroid hormone 5. Thyroidstimulating hormone 6. Insulin 7. Norepinephrine

math
how do you do translations

algebra
Why is it important to simplify radical expressions before adding or subtracting?

mass transfer
A catalytic reactor in an automobile is used to convert gas A to gas B where 3 mol of gas A diffuse to the catalyst for every 1 mol of B diffusing away at a distance (mm). the reaction balance is shown as follows: 3AB

chemistry
calculation of molarity for RMgX after repair it.

Physics: energy
The spiral shaft in a grain auger raises grain from a farmers truck into a storage bin. Assume that the auger does 6.2 x 10*5 J of work on a certain amount of grain to raise it 4.2 m from the truck to the top of the bin.What is the total mass of the grain

Physics
A 0.097 kg cup falls from the kitchen shelf and shatters on the ceramic tile floor. Assume that the maximum kinetic energy obtained by the cup is 2.6 J and that air resistance is negligible. Calculate the cup's maximum speed

Physics..Urgent!!!
In the sport of pole vaulting, the jumper's point of mass concentration, called the centre of mass, must clear the pole. Assume that a 59 kg jumper must raise the centre of mass from 1.1 m off the ground to 4.6 m off the ground. What is the jumper's

English
I just hav a sentence. Thank you He had been married for two years when his wife decided to apply for a divorce (filed for divorce)/decided to break up their relationship. How can you express this?

Math
7x^218x7/(x4)(2x^26x+3)

Algebra
Issa determined there is a linear relationship between how far up the hill she starts skiing and the length of her jump starting at 90 ft up the hill how far should she expect to jump? distance jump 50ft 37ft 65ft 48.1ft 80ft 59.2ft 95ft 70.3ft 110ft

Chemistry
How many moles of gas in a helium filled tank with a volume of 4.00 L when thepressure inside is 365 atm andthetemperture is 33 degrees Celsius

maths(urgent....please...)
A ball is hit at an angle of 36 degrees to the horizontal from 14 feet above the ground. If it hits the ground 26 feet away (in horizontal distance), what was the initial velocity? Assume there is no air resistance. math  Henry, Friday, April 8, 2011 at

percentile rank
i would like to able to find the percentile rank of a z score 0.313152 can someone tell me how to do this.

trig
4cos(2x)+2cos(x)+3=0

physics
An accelerating voltage of 2.46 * 10^3 V is applied to an electron gun, producing a beam of electrons originally traveling horizontally north in vacuum toward the center of a viewing screen 34.0 cm away. What is the magnitude of the deflection on the

physics
A Halleffect probe operates with a 120 mA current. When the probe is placed in a uniform magnetic field of magnitude 0.0840 T, it produces a Hall voltage of 0.660 µV. The thickness of the probe in the direction of B is 2.00 mm. Find the density of the

Statistics
What score in a distribution that has a mean of 500 and a standard deviation of 100, would identify the top 60% of scores?

Statistics
If 95% of the population has a measured IQ score between 70 and 130, what is the probability of meeting a person with a measured IQ either higher than 130 or below 70?

physics
The gauge pressure in each of 4 car tires is 240kpa. If each tire has a footprint of 220cm^2 , what is the mass of the car?

Statistics
If the mean rate of arrival in a restaurant is 10 customers per hour, what is the probability of having 4 customers arriving in any hour?

Statistics
Calculate according Permutation and Correlation: 8 8 7 6 8 7 6 5 P P P P C C C C 3 4 6 1 3 5 2 0

english
eliminate five letters to find one familiar word fhievleilceotptteerrs

biomath
given lengths of the a rectangle are x and y show that the greatest rectangle having a perimeter of 200 cm square and thus find at area

Statistics
If the mean family size is 4.75 what is the total population of a city of 25000 families? Is it correct if I calculate it as follows: Mean: (x : 25000) = 4.75 Mean: x = 118750 number of population

com 155
1. Adjectives describe _______________ and ________________ . 2. Adverbs describe _____________ , _____________ , or _________________ . Underline the Adjectives and Bold the Adverbs in these sentences: 1. The beautiful princess cautiously walked in the

chemistry
if you have 0.454 grams of sulfur trioxide, how many moles does this represent? how many molecules? how many oxygens atoms?

AlgebraII
I really stuck on binomial theorem and I have a whole worksheet due Monday How do I solve (x+5y)^4 I need to really understand thisplease explain the steps so I can learn from it and then use it to do the other problems

hcs/341
How has the changing roles of human resource department changed in Response to the changes in the health care industry.

math
if Y = X^2 6x  8 find the value(s) of x when y =1. ans choices are 3 3 o 9 i need help working this problem

calculus
An open box is to be constructed so that the length of the base is 4 times larger than the width of the base. If the cost to construct the base is 5 dollars per square foot and the cost to construct the four sides is 3 dollars per square foot, determine

spanish
how do you change buscar to estar

Chemistry I
iF THE THEORETICAL YIELD IF A REACTION IS 0.121G AND THE ACTUAL YIELD IS 0.112G WHAT IS THE PERCENT YIELD

algebra
If your thinking of a number between 8 and 15which is it most likely to be

Chemistry
How much water must be added to 24.0 grams of salt ot make a solution that is 12.0% by mass?

math
What is the largest possible domain for the function f(x) = sqrt x + sqrt(4  x^2) ?

Biology
Why do you need 3 types of DNA synthesis for a chromosome?

Biology
What happens when you need more or faster DNA synthesis?

MBA Executive : Banking & Finance
The Hypothetical Finance Ltd has structured a hirepurchase deal. The required to make a down payment of 20 per cent of the investment cost. The hireterm is four years with quarterly payment in advance. The flat rate of interest is 13 per cent. The

Biology
when dna replicates what happens to the chromosomes.?

law
discuss whether or not the changes to the selection of judges is leading to a wider cross section of people becoming judges. please help thanks

Biology
what signals the cell to replicate the DNA?

science
if a block of wood is pulled at constant speed on ice what would the friction be like

Math
What will the graph look like for the equation y= 2x^2 + 3

science
if i pulled a rectangular block on each of the three sides which would have the most friction

Algebra
solve (x=10) (x18) (x=13)=0

Tech401
How the internet policies of some countries may affect a company's ability to expand globally?

chem
Which of the following pairs of substances, when mixed in any proportion you wish, can be used to prepare a buffer solution? 1)NaCN and NaOH 2) HCl and NaOH 3) HCN and NaOH 4)HCl and NaCN 5) NaCN and HCN is the answer 1 and 5??

chem repost for bobpursley
Posted by polkadot on Friday, April 8, 2011 at 8:46pm. Can someone please help me by explaining and correcting me? 1) A 0.057M solution of a weak acid has a pH of 4.93. Determine the ionization constant, Ka, of the acid. a) 2.1 x 10^4 b) 2.4 x 10^9 c)

algebra
what is the fraction form of 0.048

Chemistry
44.70 ml of 0.100 M NaOH are required to completely neutralize 50.00 ml of a weak monoprotic acid, HA. When 34.43 ml of NaOH are added to another 50.00 ml of the acid, the pH reading was 4.80. Calculate Ka for the acid using the partial neutralization

Chemistry
The pH of a weak monoprotic acid, HA, is 4.55. It took 39.22 ml of 0.2334 M NaOH to titrate 25.00 ml of the acid. a. Write an equation for the above reaction. b. Calculate the molarity of the weak acid c. Write the equilibrium equation. Construct a table

Math
Factor the following.. x^2 +16x 144=0

Science
How would you set up the following unifor motion problem... How long will it take the plane to fly 1000 km (i mile=1.61 km) if it is traveling at a constant velocity of 80 km/hr.

math
Simplify, 12 divided by 1/4+2/52^3

MATH
DESHAWN TOOK A LOAN OUT FOR $1,500 AT 6.4% ANNUAL INTEREST.HIS FRIEND RAY GOT A $2,000 LOAN FROM A DIFFERENT BANK AT A RATE THAT WAS 0.002 LOWER THAN DESHAWN'S. WHAT PERCENT INTEREST WAS THE BANK CHARGING FOR RAY'S LOAN?

Bus 221, Devry
How many students must we sample if we want to be within 4% of the true proportion of female students at DeVry University when using a 95% confidence interval?

Spanish
1. Hay que ____ agua, ¿verdad? a. conserva b. conservar c. conservè d. conservo A. 2. Quiero dormir. Por favor, _____ la luz. a. apagamos b. apago c. apaguè d. apaga D. 3. ¿Debo separar el vidrio y el aluminio? claro que sí. _______ a. sepáralas b.

chemistry
A reaction rate increases by a factor of 815 in the presence of a catalyst at 37 degrees C. The activation energy of the original pathway is 106 kJ/mol. What is the activation energy of the new pathway, all other factors being equal?

chemistry
A given reaction has an activation energy of 24.52 kJ/mol. At 25C the halflife is 4 minutes. At what temperature will the halflife be reduced to 20 seconds?

English
„that helps us to become“ or „that helps us become“?

physics
A ball is rolling in a straight line at a constant speed. Another ball is motionless. what do they have in common?

Algebra
Guess the 4digit combination. An X stands for a correct digit in its correct place in the combination and an O stands for a correct digit out of its corect order. 8256 OX Two of the four digits 8,2,5,6 appear in the final combination(one in the position

Math
Could someone tell me the rate for a $6000 gift that grew to 7,000,000 over 200 years?

Math
Determine the perimeter and area of a rectangle that has a width of 6 inches and a length of 8 inches. Using a ratio of 1:2, draw a similar rectangle that is double the width and length of the first shape. Determine the perimeter and area of this new

Improving your writing
Ten years ago, you started working as a clerk for DMD Medical Supplies. Six months ago, Liz Jakowski, the human resources director, promoted you to office manager. You manage two employees: Jack Snyder and Ruth Disselkoen. Your office provides secretarial

Hcs 431
can someone help me with my question below? im confused i think it is Technology Recruiting Hiring Training Organization Development Communication Performance Management but im not sure can i get a little explanation please?

Grade 10 Math
Verify that the vertices A(6.1),B(2,5),C(6,1) and D(2,4) are the vertices of a trapezoid. Does anyone know the steps to solve this? Thanks so much.

Maths
Rodney and Rebecca play chess together. In the last 50 games, Rodney has won 18 games. If they played a further 75 games, how many would Rebecca expect to win Working out please

HUM 186
7. What are the main advantages and disadvantages of modern media delivery?

books
Chapter Summaries of the series Uglies by Scott Westerfeld?

geometry
Prove a triangle is an isosceles triangle ith P(2,3) A(5,7) and T1,4)

algebra
Heart Rate An athlete starts running and continues for 10 seconds. The polynomial calculates the heart rate of the athlete in beats per minute t seconds after beginning the run, where . (a) What is the athlete’s heart rate when the athlete first starts

trig
express in terms of ¦Ð, the interval for which 4cosx ¡Ý 2

calculus
A rectangular box is to be constructed from two different materials. The box will have a square base and open top. The material for the bottom costs $4.25/m2. The material for the sides costs $2.50/m2. Find the dimensions of the box with the largest volume

marketing,,need your help plz.
can you help me to answer thi question below.. what distribution decisions would a new firm rents vans tosmall,seasonal business to make?

math(rate of change)
find the average rate of change f(x)=x^2 + 2x between x=0 and x=6 can anyone please help me explain why the answer is 8? thank you!

Math
What is an example of two functions that intersect at least twice in the first quadrant but can neither be a polynomial or a "simple" function (i.e., sin(x), e^x)?

Physics URGENT!!!!
1.A 75 kg passenger in a van is wearing a seat belt whent he van moving at 15m/s, collides with a conrete wall. The front end of the van collapses 0.50 m as it comes to rest. a) what was the paseenger's kinetic energy before the crash b) What average force

CRIMINOLOGY
Does the states criminal system follow the rule of law which is set forth in the constitution and is federal law?

business
How did U.S. manufacturers become vulnerable to offshore outsourcing? Give examples to support your answers.

chemistry lab (college level)
So, this is going to be more like 2 or 3 questions. Here goes. First, what is the netionic reaction for Fe (III) + K4Fe(CN)6 be? I've been agonizing over this for HOURS with no answer in sight. (I don't even know what to put down as a product!) Second,

Algebra
put the following into mx+b form. x+1/6y=1/2 I got either y=x+1/12 y=x+3 I don't know which one.

english
unscramble cceanl

Physics
In the parallel circuit, if the current put out by the battery is 3 A and the current through R1 is 1 A, what is the current through R2?

calculus
how do i take antiderivative of (cosx)^3

chemistry
predict whether or not a precipitate will form if you mix 75ml of a NaOH solution with pOH = 2.58 with 125ml of a 0.018M MgCl2 solution. Identify the precipitate, if any.

Medical Information Management and Office Practice
ccording to a December 4 hospital census of 100, what are the total inpatient service days for December 5? Admissions 10 Discharges 2 A & D 1 A. 90 C. 100 B. 109 D. 110 Total inpatient service days are the total number of services received by all

macroeconomics
Calculate the total change in aggregate demand because of an initial $300 decrease in investment spending, given that C = 150 + 0.50YD. $1,200 decrease $300 decrease $150 decrease $600 decrease i think it is 300 but i think i am wrong

science
what is the strongest muscle in the body?