Saturday

August 27, 2016
Total # Posts: 2,800

**calculus**

1 pt) Coroners estimate time of death using the rule of thumb that a body cools about 2 degrees F during the first hour after death and about 1 degree F for each additional hour. Assuming an air temperature of 68 degrees F and a living body temperature of 98.6 degrees F, the ...
*April 1, 2015*

**Chemistry**

A student generated oxygen gas by decomposing hydrogen peroxide (H2O2) according to the following equation: 2H2O2(aq) -> 2H2O(l) + O2(g) If the student started with 1.75 moles of hydrogen peroxide, how many moles of oxygen gas would be produced? Show your work. ((If you can...
*April 1, 2015*

**algebra**

I have to solve this problem do not understand Chang picked 36 Apples and kept 8 of them. He split the remaining apples among his sister and brother most write an algebraic expression on how many his sister and brother got.
*March 31, 2015*

**Calculus**

A small resort is situated on an island that lies exactly 5 miles from P, the nearest point to the island along a perfectly straight shoreline. 10 miles down the shoreline from P is the closest source of fresh water. If it costs 1.5 times as much money to lay pipe in the ...
*March 30, 2015*

**calculus**

Find the point on the line 2x+4y+7=0 which is closest to the point (4,−3).
*March 30, 2015*

**calculus**

A Norman window has the shape of a semicircle atop a rectangle so that the diameter of the semicircle is equal to the width of the rectangle. What is the area of the largest possible Norman window with a perimeter of 31 feet
*March 30, 2015*

**Chemistry**

What pressure is required to reduce 34 mL of a gas at standard conditions to 16 mL at a temperature of 20◦C
*March 29, 2015*

**Calculus**

The area of a circular oil slick is increasing at a constant rate of 2 square miles per day. How fast is the radius increasing when the area is 4(pi) square miles (approximately 12.57 square miles)? So far I have that the area increases at the rate of x+(2mi^2/d) but I don'...
*March 29, 2015*

**Personal Finance**

The global economy seems to be in a debt crisis. The National Debt (what we owe) of the United States is now over $18 Trillion dollars and growing every day. Our Gross Domestic Product (our income) is around $16 Trillion. That means our debt is more than our income. Does this ...
*March 27, 2015*

**Math**

Hi! I need help with these two questions. Thanks! :) 1.) Can we multiply the Matrix A (which is 3 x 4 matrix) by the other matrix, Matrix B (which is 3 x 4 matrix)? True Or False? 2.) When we multiply the 6 x 3 matrix by the 3 x 1 matrix, the final matrix would be in what ...
*March 26, 2015*

**Physics **

The heating element in a George foreman grill is plugged into a 120-V wall socket, and 1 C of charge passes through it every 0.09 s. What is its power output, and what is the electrical energy being converted into?
*March 25, 2015*

**Physics **

The heating element in a George foreman grill is plugged into a 120-V wall socket, and 1 C of charge passes through it every 0.09 s. What is its power output, and what is the electrical energy being converted into?
*March 25, 2015*

**math**

16.7
*March 25, 2015*

**math - question stuck!**

Thank You So much, I appreciate the help
*March 25, 2015*

**math - question stuck!**

Q. A farmers in Alberta often deliver wheat to grain elevators using grain truck, which are a type of dump truck. A farmer make two trips to a grain elevator. The grain elevator manager measures the combined mass of the farmer's truck and wheat in tonnes (t), and then ...
*March 25, 2015*

**science**

A bird flying west at 35m/s dives south at 35m/s. Did the bird’s velocity change, if so how?
*March 24, 2015*

**MATH**

Q. A farmers in Alberta often deliver wheat to grain elevators using grain truck, which are a type of dump truck. A farmer make two trips to a grain elevator. The grain elevator manager measures the combined mass of the farmer's truck and wheat in tonnes (t), and then ...
*March 23, 2015*

**Statistics**

I have a bunch of questions to work on with this specific scenario but I was hoping someone can just help me get started on the first one because I'm having trouble getting started and I'll do the rest on my own.Thanks for any help! In a southern state, it was revealed...
*March 22, 2015*

**math _ HELP !!**

two points on the graph of a linear functions are (-3,5) and (-1,4). Determine the equation of the function in slope form ? can someone help explain in step ? Thanks
*March 21, 2015*

**Calculus**

Let f(x)=−x^4−8^x3+5^x+2. Find the open intervals on which f is concave up (down). Then determine the x-coordinates of all inflection points of f. 1. f is concave up on the intervals 2. f is concave down on the intervals 3. The inflection points occur at x =
*March 20, 2015*

**Calculus **

Find constants a and b in the function f(x)=(ax^b)ln(x) such that f(1/5)=1 and the function has a local minimum at x=1/5.
*March 20, 2015*

**Calculus **

Find constants a and b in the function f(x)=axbln(x) such that f(15)=1 and the function has a local minimum at x=15.
*March 20, 2015*

**physics**

Unpolarized light from an incandescent lamp has an intensity 112.0 Cd as measured by a light meter. a) What is in Cd the intensity reading on the meter when a single ideal polarizer is inserted between the bulb and the meter? b) What is in Cd the intensity reading on the meter...
*March 19, 2015*

**Chemistry**

A hot air balloon has a volume of 5.00x10^6 liters. Assuming a density of air of 1.293g/L at 25C and 1atm pressure, what temperature must the operator of the balloon achieve in order for the balloon to lift a 500.0kg payload? How do I set this up???????
*March 18, 2015*

**Physics (Tension and Springs)**

An archer must exert a force of 375 newtons on the bowstring so that the string makes a 35 degree angle with the vertical. a)find the tension in the bowstring b)if the applied force is replaced by a stretched spring, and the spring is stretched 30 cm from its unstretched ...
*March 16, 2015*

**Kinematic**

Use V=Vo+at to find time. Vo is the original velocity and V will be 0 because you are trying to see how far the motor cyclist has gone when he stops. Find time, then use x=Xo+Vot+(1/2)at^2 to find distance.
*March 16, 2015*

**Physics**

A beam of light makes an angle of θi = 53.0˚ with the normal of a slab of transparent material of t=3.80 mm-thickness. The index of refraction of the glass is n2 = 1.39. Angle 3 is 53.1 b) How far vertically (d) is the point at which the beam leaves the glass surface...
*March 13, 2015*

**chemistry**

Show the calculation of (1) the expected grams of urea (CH4N2O) formed in the reaction of 6.5 grams of lead cyanate (Pb(CNO)2) with excess ammonium hydroxide and then show the calculation of (2) the % yield if the actual yield of urea is 1.89 grams. Reaction is shown below: Pb...
*March 12, 2015*

**chemistry**

Sorry i scrolled down there is no reaction. i need help with these four questions
*March 12, 2015*

**chemistry**

Show the calculation of (1) the expected grams of aspirin (C9H8O4) formed in the reaction of 2.7 grams of salicylic acid (C7H6O3) with excess acetic anhydride and then show the calculation of (2) the % yield if the actual yield of aspirin is 1.44 grams. Reaction is shown below:
*March 12, 2015*

**chemistry**

Show the calculation of (1) the expected grams of aspirin (C9H8O4) formed in the reaction of 2.7 grams of salicylic acid (C7H6O3) with excess acetic anhydride and then show the calculation of (2) the % yield if the actual yield of aspirin is 1.44 grams.
*March 12, 2015*

**chem**

Show the calculation of (1) the expected grams of salicylic acid (C7H6O3) formed in the reaction of 1.75 grams of methyl salicylate (C8H8O3) with excess NaOH and then show the calculation of (2) the % yield if the actual yield of salicylic acid is 1.19 grams.
*March 12, 2015*

**Math**

The answer is d. What you do is multiply the two mixed numbers. The first thing you do is convert the mixed numbers into improper fractions then multiply them together, then make them mixed numbers again. Your answer will be 5 1/4.
*March 12, 2015*

**Physics**

A 100 lb block of ice slides down an incline 5.0 ft long and 3.0 ft high. A worker pushes up on the ice parallel to the incline so that it slides down at constant speed. The coefficient of friction between the ice and the incline is 0.10. Find (a) the force exerted by the ...
*March 12, 2015*

**Physics**

A 100 lb block of ice slides down an incline 5.0 ft long and 3.0 ft high. A worker pushes up on the ice parallel to the incline so that it slides down at constant speed. The coefficient of friction between the ice and the incline is 0.10. Find (a) the force exerted by the ...
*March 11, 2015*

**Physics**

A 100 lb block of ice slides down an incline 5.0 ft long and 3.0 ft high. A worker pushes up on the ice parallel to the incline so that it slides down at constant speed. The coefficient of friction between the ice and the incline is 0.10. Find (a) the force exerted by the ...
*March 11, 2015*

**Math**

3 pumps were used to empty a pond hold an unknown amount of water. If pump 1 can empty it in 4 days, pump 2 in 10 days and #3 in 5 days, how many days will it take to empty the pond if all 3 are running at the same time?
*March 8, 2015*

**Health**

it is B
*March 6, 2015*

**Algebra**

A rectangular pool has a perimeter of 142 feet. The length is 25 feet longer than the width. Find the length and width of the pool.
*March 5, 2015*

**algebra**

A store sold 60 DVDs. Some of these were on sale and sold for $4.95 each, while the rest priced at $5.95 each. If the sales receipts for DVDs at the end of the day totaled $317.00, how many of each type were sold?
*March 1, 2015*

**physics -PLS HELP ASAP**

a bungee jumper is falling at a velocity of 2m/s [down] when the bungee cord just starts to stretch. after the cord stretches for 2.5s, the velocity is 11m [down]. assume that the acceleration is at constant. a) what is the acceleration of the jumper? b) what is the total time...
*February 22, 2015*

**Physics Urgent!!**

a bungee jumper is falling at a velocity of 2m/s [down] when the bungee cord just starts to stretch. after the cord stretches for 2.5s, the velocity is 11m [down]. assume that the acceleration is at constant. a) what is the acceleration of the jumper? b) what is the total time...
*February 22, 2015*

**Science**

What is the primary reason for the trend in atomic radius going from left to right across the periodic table? 1.All atoms in a given period of the table are the same size because the same main energy level is being filled. 2.There is no clear trend, the atoms all have ...
*February 13, 2015*

**science**

what happens when two objects of unequal masses collide?
*February 12, 2015*

**grammar**

Which is the subject of this sentence? Look in the index for a mention of this type of error. A. type B. index C. (you) D. mention
*February 11, 2015*

**Physics**

I had a problem with this too, though. For the first part I did basically g/4 ( M x g/4 = M x a) which should have been 2.45m/s^2 but apparently that's wrong, and I can't figure out why.
*February 10, 2015*

**Physics **

A bicyclist makes a trip that consists of three parts, each in the same direction (due north) along a straight road. During the first part, she rides for 23.7 minutes at an average speed of 6.31 m/s. During the second part, she rides for 25.0 minutes at an average speed of 4....
*February 9, 2015*

**Language Arts**

I am really confused, originally I thought the answer was A but now I see your opinions I'm confused. :)
*February 4, 2015*

**Phy **

A flat 1.0m^2 surface is vertical at x=2.0m and parallel to the yz-plane. What is the flux through the surface if it is located in a uniform electric field given by E= 26.0i + 42.0j + 62.0k N/C? Im having trouble understanding the question, I know how to do vectors but this ...
*February 3, 2015*

**physics**

A block of mass 3.17 kg is hanging from a rope. The tension in the rope is 12.9 N, pulling upward on the block. What is the magnitude and direction of the acceleration of the block?
*February 1, 2015*

**Physics**

Two point charges Q1=-6.80nC and Q2 = -5.80nC are separated by 33.0cm. What is potential energy of the pair? Answer in units of Joules.
*January 30, 2015*

**Language Arts**

Do you got Connections in 8th Grade?
*January 30, 2015*

**math**

Adam drew two same size rectangles and divided them into the same number of equal parts.He shaded one third of one rectangle and one forth of the other rectangle.What is the least number of parts into which both rectangles could be divided?
*January 29, 2015*

**Algebra**

Please solve using substitution method. 2n-11=m/4 n=m/-3
*January 29, 2015*

**math**

A cube of wood measures 6 centimeters on a side and weighs 25 grams. Complete parts a. What is the density of the cube of wood? b. Will it float in water?
*January 28, 2015*

**vet tech**

think about a dog's face the ears are behind the eyes therefore closer to the tail.
*January 24, 2015*

**english**

you will never know ^-^
*January 23, 2015*

**Trig/ English**

I need an Acrostic poem for the word "Exponent"
*January 22, 2015*

**Physics help - Earths force**

Is the force of the earth’s gravity on the sun stronger, weaker, or the same as the force of the sun’s gravity on the earth? Explain why the sun’s attraction affects the motion of the earth more than the earth’s attraction affects the sun’s motion. So ...
*January 8, 2015*

**History**

How and why did the election of 1800 occur? How, and why did the judiciary act of 1801 established
*January 8, 2015*

**History**

Why and how was the judiciary act of 1800 passed? Who all was involved?
*January 7, 2015*

**math**

esGferl g,ktbr,kjT,aI
*January 7, 2015*

**math**

on a certain day the propellers complete 20 revolutions per minute and have a speed at of 45 m/s calculate the radius of a propeller to one decimal place using pie as 3.14 ?
*January 7, 2015*

**Physic~~~**

Saturn has a radius of about 9.0 earth radii, and a mass 95 times the Earth’s mass. Estimate the gravitational field on the surface of Saturn compared to that on the Earth. So I was doing this and I got stuck here; gs = G*Ms/Rs² = G*(95Me)/(9²Re²) = ge*(95/...
*January 6, 2015*

**Math**

Use the digits 4'5'6'7' and 8 once each to write an odd five-digit number . Write it both in standard form and in word form
*December 11, 2014*

**math**

A total of 121 people came to the school science fair this year. This is 7 more than twice the number of people who came to last years science fair. How many people came last year?
*December 10, 2014*

**math**

PLASE HELP ME
*December 9, 2014*

**math**

alan, gil, and deb's point in a video game was in the ratio 2:3:4.deb scored 114400 points. how many points did gill score? how many points did they score in all PLEASE HELP but can you make your answer so that I can understand I am in 6th grade but I am not the that smart...
*December 9, 2014*

**English**

I need help annotating an essay that I got. I need help finding rhetorical devices, ethos, pathos, and logos appeals. I also need help explaining why, forexample, a line or passage reflects an ethos appeal and so on. This is for "Concerning the Dangers from Foreign Force ...
*December 9, 2014*

**English**

Can someone help me with this? Thank you! Prompt A: Compare and contrast the topics and themes of writers from the Americas and European writers. Include specific examples to support your statements.
*December 4, 2014*

**Math **

Evaluate log sqrt(5) 125sqrt(5).
*December 3, 2014*

**English**

I have an outline in my head. I was hoping we could bring one in for the final, but we are not allowed to have anything prior except a thesis statement. I'll adjust it prior to the final day. Thank you both for your advice! - I remember Bob Pursley being helpful way back ...
*December 3, 2014*

**English**

*finding ... :)
*December 3, 2014*

**English**

Thank you for your comments and suggestions. I only wish I could write the thesis statement after the essay, however, the instructor has mandated thesis statements be written prior to beginning the essay. This is our final which begins in just a few minutes. We will be given ...
*December 3, 2014*

**English**

Orrrrrrr .... A father-daughter relationship helps define who we are today as it helps to shape the way we see things and deal with life in general; yet not all relationships are storybook material and some travel the spectrum from sheer happiness to the pits of hell to ...
*December 3, 2014*

**English**

Dadgum comma splices get me every time!!! Unfortunately, we can only have one sentence for a thesis statement so I am desperately striving to make this work. - Would this be better? A father-daughter relationship helps define who we are today as it helps to shape the way we ...
*December 3, 2014*

**English**

Checking for grammatical correctness. Thank you, in advance!!! - This is a thesis statement: A father-daughter relationship helps define who we are today as it helps to shape the way we see things and deal with life in general, yet not all relationships are storybook material...
*December 3, 2014*

**ELA**

Thank you Ms. Sue
*December 1, 2014*

**ELA**

I don't know what the heck V/CV OR VC/V means. PLEASE HELP ME
*December 1, 2014*

**calculus**

I needed help with these FRQ in my APCalc course. Any help or walkthrough would be extremely helpful - thanks in advance. Let f be the function given by f(x)=3ln((x^2)+2)-2x with the domain [-2,4]. (a) Find the coordinate of each relative maximum point and each relative ...
*December 1, 2014*

**Math**

A document that is 30in x 40 in is redrawn 1 1/2 scale and redrawn again at a 1/2 scale. What are the final dimensions? On this i have no clue what to do.
*December 1, 2014*

**math!!**

mike and sam begin saving money at the same time. mike plans to save $3 a month and sam plans to save $8 a month. After how many months will sam have $25 more than mike?
*November 24, 2014*

**math**

change the following mixed numbers to a fraction in the forma/b were a and b are integers 3 5/6 ?
*November 24, 2014*

**math**

so is the correct way 0.7024 0.75 0.8315
*November 24, 2014*

**math**

arrange in order smallest to largest 0.8315, 0.75 ,0.7024 is this right 0.75 0.7024 0.8315
*November 24, 2014*

**chemistry**

Calculate the vapor pressure of a solution containing 28.7g of glycerin (C3H8O3) in 136mL of water at 30.0 ∘C. The vapor pressure of pure water at this temperature is 31.8 torr. Assume that glycerin is not volatile and dissolves molecularly (i.e., it is not ionic) and ...
*November 23, 2014*

**English**

Rochester says, "God pardon me!" and "Man, meddlee not with me" after Jane agrees to marry him because... Need to finish the sentence. This question is referring to the book, Jane Eyre.
*November 23, 2014*

**Business Communication**

Thanks
*November 19, 2014*

**Business Communication**

If the purpose of your message is to ask local businesses to sponsor your event, your desired outcome would most likely be__________. a.to inform them about your event. b. to promote understanding about your event's goal. c. to propose ways in which they could help. d. for...
*November 19, 2014*

**Business Communication**

When communicating a message, the best approach for a boss to take would likely be the ____________. a. state the main idea right away to get it over with. b. hint at the main idea and let the employees read between the lines. c. tell employees bad news first and then explain ...
*November 19, 2014*

**Business Communication**

In which of the following cases is the direct organization method most appropriate? a. asking your boss for an extension on an assignment. b. recommending a controversial change in departmental procedure to your boss, c . requesting a day off during your company's busy ...
*November 19, 2014*

**math**

Find the present value, using the present value formula. (Round your answer to the nearest cent.) Achieve $225,500 at 8.45% compounded continuously for 8 years, 145 days.
*November 12, 2014*

**Language Arts 8**

This is a Language Arts 8 A. I haven't ever done this but this is a big grade and Language Arts is my worst subject. I don't know if you've read the book The Trouble with Television there is a like below. Please Help!!! 1. What is the Main Point MacNeil is making ...
*November 11, 2014*

**math**

1+1=2
*November 8, 2014*

**math**

case 1
*November 8, 2014*

**Organice Chem**

Could you use acetone as a solvent to recrystallize acetanilide? Justify
*November 6, 2014*

**physics**

Three people pull simultaneously on a stubborn donkey. Jack pulls eastward with a force of 72.7 N, Jill pulls with 79.9 N in the northeast direction, and Jane pulls to the southeast with 103 N. (Since the donkey is involved with such uncoordinated people, who can blame it for ...
*November 3, 2014*

**worl geography**

I think the answer is c because they all have constitutional government systems.
*November 2, 2014*

**geometry**

the area of a pool is 12 square units and the area of the walkway around the pool is 60 square units, what is the perimeter of the walkway?
*October 30, 2014*

**Algebra 2 & trig **

joanna invested $7500, part at a 5.5% and the remainder at a 6% annual rate of interest. if she collected a total of 435 in interest at the end of one year, how much money was invested at each rate?
*October 28, 2014*