Wednesday

May 27, 2015

May 27, 2015

Total # Posts: 523

**Precalculus**

Suppose 3 mg of a drug is injected into a person's bloodstream. As the drug is metabolized, the quantity diminishes at the continuous rate of 6 % per hour. Find a formula for Q(t), the quantity of the drug remaining in the body after t hours. Find approximations to two ...
*September 21, 2011*

**programming**

2-5 Grade Determination is says " Write a program that will input three test scores. the program should determine and display their average. the program should then display the appropriate letter grade based on there average. the letter grade should be determined using a ...
*September 21, 2011*

**Engineering**

It is found that ozone reaction in water nearly follows first-order kinetics in ozone concentration decreases by 50% in 12 minutes (t1/2 = 12 min). A water supplier wants to inject ozone into a pipe bringing water to thee water treatment plant to pre-disinfect the influent. ...
*September 19, 2011*

**Environmental Engineering**

Consider the air over a city to be a box 100km on a side that reaches up to an altitude of 1.0 km. THe air is blowing into the box along one of its sides with a speed of 4 m/s. Suppose an air pollutant with a reaction rate of K = 0.20/hr is emitted into the box at a total mass...
*September 19, 2011*

**math**

A store sold 64 sweatshirts one day. Of these, 12 were gray. The store manager plans to order 400 more sweatshirts. Based on the data, how many gary sweatshirts should the manager order?
*September 15, 2011*

**math**

352/4=88
*September 15, 2011*

**Physics**

A ball is thrown straight up and passes point B(at a height of 45.6m above its starting point O) in 4.9s What was its initial speed? The acceleration of gravity is 9.8m/s^2 Answer in units of m/s. I think the answer is -14.7m/s but im not sure since you probably cant have ...
*September 10, 2011*

**Physics & Gravity**

The acceleration due to gravity on the moon is about one-sixth its value on earth. If a baseball reaches a height of 51 m when thrown upward by someone on the earth, what height would it reach when thrown in the same way on the surface of the moon? Answer in units of m would ...
*September 9, 2011*

**accounting**

1. Please refer to the worksheet below. Trial Balance Adjustments Adjusted Trial Balance Income Statement Balance Sheet Account Title Dr. Cr. Dr. Cr. Dr. Cr. Dr. Cr. Dr. Cr. Cash $1,700 $1,700 $1,700 Accounts receivable 8,500 $2,000 10,500 10,500 Supplies 100 $80 20 20 ...
*August 15, 2011*

**Reading**

What Does It Mean When They Say Death Before Dishonor
*August 7, 2011*

**Poetry**

Decide which word from the word bank belongs in each blank in the statements that follow. bland / contaminated / devastated / punitive / transcend / concretely / convey / procrastinating / spontaneous / uniqueness 1. Even though I know doesn't pay, I still put off until ...
*June 20, 2011*

**math**

If the store purchases an item at a wholesale cost of $3.50 per item, and it is sold at a retail value of $5.00 per item. What is the gross profit percentage of the item? (formula: gross profit percentage = [(retail - cost) divided by retail] X 100 )
*June 15, 2011*

**Math**

An observer 2.5 miles from the launch pad of a space shuttle measures the angle of elevation to the base of the shuttle to be 25 degrees soon after lift off. How high is the shuttle at that instant? (Assume that the shuttle is still moving vertically)
*May 10, 2011*

**Math**

An observer 2.5 miles from the launch pad of a space shuttle measures the angle of elevation to the base of the shuttle to be 25 degrees soon after lift off. How high is the shuttle at that instant? (Assume that the shuttle is still moving vertically)
*May 10, 2011*

**Algebra**

thanks
*May 5, 2011*

**Algebra**

Use the function below to answer the following parts. 1/3x - 4 if -6 </= x < - 3 f(x) = 2 if -3 < x < 3 x^2 - 4 if x > 3 I found out the domain, range, and points of disontinuity. I think i did them right: Domain= [-6,infinity] Range= [-6,infinity] and points of...
*May 5, 2011*

**Algebra**

1/3x - 4 if -6 </= x < - 3 f(x) = 2 if -3 < x < 3 x^2 - 4 if x > 3
*May 5, 2011*

**Algebra**

Use the function below to answer the following parts. f(x) = 1/3x - 4 if -6 ¡Ü x < ¨C 3 2 if ¨C 3 < x < 3 x^2 ¨C 4 if x > 3 I know that: Domain= [-6,infinity] Range= [-6,infinity] and points of discontinuity = x=-3,x=3 How do i graph these ...
*May 5, 2011*

**math**

1875 if paid monthly
*April 27, 2011*

**math **

a restaurant offered pizza with 3 types of crust and 7 different toppings. how many different types of pizzas could be offered. 7 toppings on each i came up with 21 but not sure
*April 27, 2011*

**math**

with 7 toppings
*April 27, 2011*

**math**

a restaurant offered pizza with 3 types of crust and 7 different toppings. how many different types of pizzas could be offered?
*April 27, 2011*

**Maths**

Kindly predict the winning numbers from these past results 2 draws 79-64-62-89-8 & 5-52-14-27-22.
*April 12, 2011*

**math**

That Hairline
*March 28, 2011*

**math**

what is the nearest tenth of a centim eter in 4 inches
*March 13, 2011*

**physics**

m1v1=m1v1prime+m2v2prime
*March 13, 2011*

**SCIENCE**

WHAT IS PRESSURE EXERTED OUTWARDLY IN A CYCLINDER THAT HAS ONE END CLOSED AND THE OTHER OPEN WHEN AN INTERNAL HEAT SOURCE RAISES THE TEMPERATURE FROM 70 DEGREE F TO 300 DEGREE F IF THE CYCLINDER IS 48 INCHES DIAMETER AND 240 INCHES LONG
*March 10, 2011*

**Arithmetic**

the 16th term of an AP is 93,given that its common difference is 6.find the 28th term?
*February 27, 2011*

**science 4th grade**

How are the properties of the compound water different from the properties of the elements in it?
*February 8, 2011*

**math**

The question that have is to simplify and write the answer in exponential notation using positive exponents 2 to 4th power x 2 -2 These are my choices a 4 to the 8th power b 2 to the 8th power c 4 to the 2nd power d 2 to the 2nd power
*February 5, 2011*

**Chemistry--DR.BOB HELP!**

Ur the BEST DR.BOB!
*February 5, 2011*

**Chemistry--DR.BOB HELP!**

If 1 volume of 0.1 KH2PO4 is mixed with 2 volumes of 0.1 OHEtNH2 (pka=9.44), what will be the pH of the mixture? I know I know: HH equation
*February 5, 2011*

**biochemistry**

I believe you, correct if I'm not mistaken on part A. The answer is 7.50. for part B: the Base is the amount of initial base minus the amount of base protonated. Maybe Dr.Bob should show us Visually . DR.BOB!!!
*January 21, 2011*

**Math**

a person cleared a rectangular plot of land and covered it with gravel. then he got 9 square wooden sections of side lengths: 2,5,7,9,16,25,33 and 36. by placing the squares on the gravel with no two overlaping, the person built a patio which exactly covered the graveled ...
*December 16, 2010*

**organic chwmistry**

When bromobenzene reacts with propene in a Heck reaction, two constitutional isomers are obtained as a product. Give the structures of the two
*December 8, 2010*

**Physics**

An Olympic swimming pool is heated and maintained at 30 °C in the winter. It has a volume of 2500 m3, a length of 50 m, and a width of 25 m. During a storm, the pool receives 1 cm of rain over its surface area. If the rain is 15 °C, what will the temperature of the ...
*December 5, 2010*

**Physics**

A 1.00-kg beaker containing 2.0 kg of oil (density = 916 kg/m3) rests on a scale. A 2.00-kg block of iron is suspended from a spring scale and is completely submerged in the oil. Find the equilibrium readings of both scales. I was able to find the equilibrium reading for the ...
*December 3, 2010*

**Computer Programing & Logic Design**

.A program that accepts candy data continuously until a sentinel value is entered and displays a list of high-priced, best-selling items. High-priced items are those that sell for $10 per pound or more.
*November 20, 2010*

**Math**

1. Determine the vertex of the parabola: y= 7x^2+14x+6 2. For the following 2 functions,identify the horizontal and vertical asymptotes. a)f(x)= 3x(x-2)/x(x-1) b)g(x)= x/(x+7)^2
*October 31, 2010*

**college math**

the Laplace transform of e^4t(cos 2t)?? please i need help. thanks
*October 27, 2010*

**Cultural Anthropology**

one of the three food producing groups to explain if they are a more costly subsistence pattern in time, effort & calories as compared to the foraging groups.
*October 24, 2010*

**Math**

The Lappans buy 3 large sandwich wraps to serve at a picnic. 9 people in all will be at the picnic. Show 3 different ways to cut the sandwiches so that each person gets an equal share.
*October 18, 2010*

**Math**

3 neighbors are sharing a rectangular strip of land for a garden. They divide the land into 24 equal sized pieces. What fraction of the land does each person get if they share it equally? Write the answer in more than one way.
*October 18, 2010*

**Math**

The Lappans buy 3 large sandwich wraps to serve at a picnic. 9 people in all will be at the picnic. Show 3 different ways to cut the sandwiches so that each person gets an equal share.
*October 18, 2010*

**stats**

Microbes in a certain colony exposed to radiation have a 1/6 chance of being mutated. a. If ten microbes from the colony are sampled, what is the probability that exactly 4 will be mutated? b. If ten microbes from the colony are sampled, what is the probability that at most 4 ...
*October 16, 2010*

**chemistry honors**

how many grams of a stock solution that is 85% H2SO4 by mass would be needed to make 150 grams of a 45.0 percent solution?
*September 30, 2010*

**Math**

Can the rations 2/18 and 5/45 make a proportion?
*August 9, 2010*

**algebra**

use intrcepts to graph the equation x + 4y = 8
*July 8, 2010*

**algebra**

solve te compound inequality 6 > -5x + 5 or 9 < - 3x + 4
*July 8, 2010*

**algebra**

Find the indicated outputs for f(x) = 2x(2) - 2x f(0), f(1), f(2)
*July 5, 2010*

**english**

Alright thankyou, is there anymore you can find?
*July 5, 2010*

**english**

I need to find rhetorical devices in this speech. -- Pearson’s address on the inauguration of the national flag of Canada: On September 5, 1945 an Order-in-Council was passed declaring the Red Ensign to be Canada's National Flag pending a decision of the Parliament of...
*July 5, 2010*

**calculus**

I need help understanding how the series of e derives into the exponential series using the binomial theorem. Here is a link to a pic of a page in my book, regarding the exponential series: ht tp://i46.tiny pic(.)(com)/qz0oat . jpg (remove parentheses and spaces) A couple of ...
*June 5, 2010*

**calculus**

How can the graph of f(x)=1/2(x+10)^2-2 be obtained from the graph of y=x^2
*May 22, 2010*

**calculus**

How can the graph of f(x)=1/2(x+10)^2-2 be obtained from the graph of y=x^2
*May 22, 2010*

**chemistry**

a sample of gas is collected over water at a temperature of 35 degrees celcius when the barometric pressure reading is 742.0 torr what is the partial pressure of the dry gas?
*May 18, 2010*

**algebra**

1. On three consecutive passes, a football team gains 5 yards, loss 18, and gain 50 yards. What number represents the total net yardage? The total net yardage is 2. -4<=3x-3<=-2 The solution is xl _ <=x<=_? 3. -5<x<=6 What would this answer look like on a ...
*April 26, 2010*

**math**

5+5+1+1 4+4+2+2
*April 23, 2010*

**English**

PLEASE HELP ME WITH THIS!!! GIVE ME A WEB LINK OR SOMETHING GOOD!!! what is being stated in the last long stanza (the third one) of the lyric "If I Ruled the World.!!!!"
*April 20, 2010*

**Global History**

How and why are hate groups protected by the constitution? What actions and speech do you think are not protected and why?
*April 9, 2010*

**College Math**

By looking at two linear equations, how can you tell that the corresponding lines are parallel?
*March 18, 2010*

**Chemistry**

In a titration HCl and NaOH have a 1:1 ratio. Can you still use the formula M1V1 = M2V2 to find the molarity of the NaOH base if we change the acid to sulfuric H2SO4?
*March 4, 2010*

**math**

1. Hot dogs come 10 to a package, and hot dog buns come 8 to a package. What is the smallest number of packages of each that Phillip could buy so that there are no leftover hot dogs or buns? Hot dogs 4 Hot dog buns 5 2. Hamburger patties come 6 to a package, and hamburger ...
*February 21, 2010*

**12th grade**

Pros: It gave more equality, and less discrimation to minorities. (give many examples of this, like it made it illegal to ban minorities from doing anything a white person could do.) It gave further meaning to the philosophy that all man (people in general) are created equal ...
*February 16, 2010*

**physics**

A particle's constant acceleration is south at 2.4 m/s2. At t = 0, its velocity is 43.4 m/s east. What is its velocity at t = 8.0 s? What is the magnitude and direction?
*February 14, 2010*

**Physics**

31.7m/s^2 northeast
*February 12, 2010*

**math **

Are my answers right please? 1. Hot dogs come 10 to a package, and hot dog buns come 8 to a package. What is the smallest number of packages of each that Ms. Evans could buy so that there are no leftover hot dogs or buns? Hot dogs 4 packages Hot dog buns 5 packages 2. ...
*February 10, 2010*

**physics**

Ha Ha !!!
*February 5, 2010*

**science**

can a plant live without water air or sunlight?
*December 16, 2009*

**physics**

I'm sorry I'll stop changing names
*December 13, 2009*

**physics**

A submarine is constructed so that it can safely withstand a pressure of 1.6 x 107 Pa. How deep may this submarine descend in the ocean if the average density of seawater is 1025 kg/m3.
*December 13, 2009*

**algebra**

I'm not sure how to solve this problem, but the answer's -12 e^(x-6)=(1/e^2)^(X+6) Thanks :D
*December 6, 2009*

**4th grade**

why is .4 equal to .40
*December 3, 2009*

**physics**

A box of mass 18.8 kg is pulled to the right with a horizontal force of 9 N. If the box moves to the right with a constant velocity of 1.06 m/s, what is the frictional force acting on the box?
*November 16, 2009*

**Math**

Thanks Ms. Sue. Can anyone help with the second question.
*November 9, 2009*

**Math**

Professional Security Systems purchased 5 dozen dead-bolt lock sets from a manufacturer for $255. If the company's markup rate is 28% of the selling price, what is the selling price of each lock set? Determine the cost ratio (Retail Method) for Twilight Games and Comix ...
*November 9, 2009*

**Physics121**

The back wall of an auditorium is 29.0 m from the stage. If you are seated in the middle row, how much time elapses between a sound from the stage reaching your ear directly and the same sound reaching your ear after reflecting from the back wall?
*November 8, 2009*

**Physic**

i am not learning acoustics...but physics..sorry for the mis-spelling...i am sorry but i dont understand your approach
*November 8, 2009*

**Physic**

The back wall of an auditorium is 29.0 m from the stage. If you are seated in the middle row, how much time elapses between a sound from the stage reaching your ear directly and the same sound reaching your ear after reflecting from the back wall?
*November 8, 2009*

**algebra 2**

5X + 7(5X-14)=-18 5X + 35X-98=-18 40X-98=-18 40X=80 X=2 y=-4 You can check these answers by plugging into the original equations
*November 8, 2009*

**Physic**

A fan at a rock concert is 30 m from the edge of the stage. The sound intensity level at the edge of the stage is 110 dB. The fan's eardrums have a diameter of 8.4mm. How much energy is transferred to each eardrum in one second? (Hint: It may help to asume that the speaker...
*November 7, 2009*

**Physics**

I didnt quite follow ...
*November 7, 2009*

**spanish **

Could also be: Que vas a hacer despues del colegio or que haces despues de la escuela. and como escuela va hasta el momento
*October 30, 2009*

**chemistry.**

Which hydrocarbon pair below have identical mass percentage of C? A: C3H4 and C3H6 B: C2H4 and C3H4 C: C2H4 and C4H2 D: C2H4 and C3H6 E: None of the above My answer is E...Can any one help me?
*September 27, 2009*

**chemistry.**

The molecular of aspartame, the generic name of Nutrasweet, is C14H18O5. The molar mass of aspartame is?
*September 25, 2009*

**English**

Taking a computer home to complete a work-related assignment. Is it ethical or unethical? When an individual takes a job they ensure their employer that they will work their very best, and distribute quality work. By any means the worker is required that they get the assigned ...
*September 12, 2009*

**English**

In my own perspective I believe that deemphasizing negative test results on a product is a very unethical choice. Negative results have an endless limit of problems that can occur. For example, you could put your entire company in jeopardy if you were to hide the negative ...
*September 12, 2009*

**English**

Why deemphasizing negative test results in a report on your product idea is unethical practice?
*September 12, 2009*

**organic chemistry**

Some biphenyl (C6H5-C6H5) is produced as a by-product in the synthesis of benzoic acid. Where does it come from? This question has to deal with the Grignard reaction. Can anyone help me with this please?
*May 27, 2009*

**Chemistry**

Two moles of pure ammonia were injected into a 2.00L flask at a certain temperature. The equilibrium mixture: 2NH3(G)-->N2(G) + 3H2(G) <-- A) What is the value of the equilibrium constant at this temperature? b) how would the number of moles of ammonia be affected if the...
*May 17, 2009*

**Physics**

An ice cube of mass M is placed at rest in on a circular track of radius R, as shown at right. The position of the ice cube along the track follows that of a circle, given by: x^2 + (R – y)^2 = R^2 . A)With respect to the bottom of the track, calculate the potential ...
*May 1, 2009*

**English**

Can someone explain me how to write an essay?
*April 4, 2009*

**Chemistry**

Which element has the following electron configuration: [Xe] 6s^(2) 5d^(1) 4f^(1)
*March 16, 2009*

**Chemistry**

Which electron is, on average, further from the nucleus: an electron in a 3p orbital or an electron in a 4p orbital?
*March 16, 2009*

**Chemistry**

According to the quantum-mechanical model for the hydrogen atom, which of the following electron transitions would produce light with the longer wavelength: 2p --> 1s or 3p --> 1s I have the answer, which is 2p --> 1s, but can someone offer some help as to how this is...
*March 16, 2009*

**business math**

The Kansas City Star on February 16, 2007 reported on the lowering prices of natural gas. With lower natural gas prices and unseasonably warm weather early this winter the forecast is that gas-heating customers will pay $950 as compared to $1,339 last year. At Kansas Gas ...
*March 8, 2009*

**chemistry**

thank you DrBob222!!!
*March 5, 2009*

**chemistry**

what [I-]should be maintained in KI(aq) to produce a solubility of 1.3*10^-5 mol PbI2/L when PbI2 is added?
*March 5, 2009*

**U.S History**

Thanks, you helped me out a lot :)
*February 26, 2009*

**U.S History**

Which factor, self-interest or idealism, was more important in driving American foreign policy in the years 1895-1920? Thanks for the info :)
*February 26, 2009*