Thursday

February 11, 2016
Total # Posts: 1,020

**math fractions and decimals**

which is more 0.85 or 7/9
*January 1, 2016*

**Math**

Thank you so so so much @Damon, ur a lifesaver. :D
*December 16, 2015*

**Math **

So this is a math quiz I took a few months ago and they said I can redo it, but I have to explain why the correct answer is correct... And idk. Which equation represents 15 more than r is 61? The answer is r + 15 = 61 but idk why? What is the value of 4^2 -2 (3 x 5 + 1) The ...
*December 16, 2015*

**Math **

In a shipment of 400 parts, 15 were found to be defective. How many defective parts should be expected in a shipment of 1000 parts?
*December 10, 2015*

**Math**

Carol spends 15 hours every 2 weeks practicing her culinary skills. How many hours does she practice in 5 weeks ?
*December 10, 2015*

**Math**

I am not sure what formula do j use
*December 10, 2015*

**Math**

Mary can read 20 pages in 30 minutes. How long would it take her to read 160 page book? Write your answer in hours and minutes .
*December 10, 2015*

**Math**

A worker can complete the assembly of 12 tape players in 4 hours. At this rate, how many can the worker complete in a 40 hour work week ?
*December 10, 2015*

**Math**

The ratio of boys to girls in a class is 6 to 5. How many girl students are there if there are 30 boys?
*December 10, 2015*

**math**

The production costs for 4 lollies is 9.55 strawberry, 8.70 orange, 9.99 grape, 6.30 bubblegum. The packaging is the same for all lollies at 5.00 per lolly. Owners like to add 25% markup on their stock. Calculate the retail price of the strawberry lolly. Is packaging included ...
*November 26, 2015*

**Chem**

How many liters of H2 gas can be produced at 0 ∘C and 1.00 atm (STP) from 48.0 g of Zn? Zn(s)+2HCl(aq)→ZnCl2(aq)+H2(g)
*November 9, 2015*

**science**

will the air above a surface that has a high albedo be warmer or cooler than the air above a surface that has a low albedo? Low.
*November 5, 2015*

**earth science**

briefly explain how earths atmosphere heated? Energy is transferred between the earth's surface and the atmosphere via conduction, convection, and radiation. Conduction is the process by which heat energy is transmitted through contact with neighboring molecules
*November 5, 2015*

**Calculus**

The consumer demand equation for tissues is given by q = (97 − p)2, where p is the price per case of tissues and q is the demand in weekly sales. (a) Determine the price elasticity of demand E when the price is set at $26. (Round your answer to three decimal places.) E =...
*October 28, 2015*

**math**

If 3 people walk around a track, one takes 6 min, one takes 9 min and one takes 12 min. How long til they meet at the start line?
*October 26, 2015*

**Chemistry**

How many electrons in an atom could have these sets of quantum numbers? n=3 n=5 , l=2 n=7 , l=3 , ml=-1
*October 25, 2015*

**Probability/ Stats**

Assume that it is known that 95 percent of the launching of satellites into orbit are successful. What is the probability that in the next four launching there will be. Not sure where to start. can someone help me with steps on how to find the answer?
*October 19, 2015*

**Statistics**

A family consists of ten children. Assuming that the sexes are equally probable, find the expected number of boys in the family. What is the probability that the expected number of boys will not occur? (Not sure where to start) I got partial credit and I answered 5 (Question ...
*October 19, 2015*

**chemistry**

Write the net ionic equation for the following molecular equation. HNO3 is a strong electrolyte. NaNO2(aq) + HNO3(aq)--> NaNO3(aq) + HNO2(aq) HNO2 is a weak electrolyte.
*September 27, 2015*

**Math**

Salon an was told the written paper on his science experiment should express measurements in liters. Which shows how to calculate the number of liters he used if he used 5 cups of water
*September 24, 2015*

**Biology**

Which of the following depends on bacteria?
*September 9, 2015*

**vocabulary**

the couple ordered for hors d'oeuvres at the wedding
*July 11, 2015*

**stats**

The mean tax-return preparation fee H&R Block charged retail customers last year was $183 (The Wall Street Journal, March 7, 2012). Use this price as the population mean and assume the population standard deviation of preparation fees is $50. Round your answers to four decimal...
*June 26, 2015*

**stats**

Three firms carry inventories that differ in size. Firm A's inventory contains 2000 items, firm B's inventory contains 5000 items, and firm C's inventory contains 10,000 items. The population standard deviation for the cost of the items in each firm's inventory...
*June 26, 2015*

**algebra**

From 2009 to 2014 the percent of students placing into Math 101 has increased from 13% to 25%. Meanwhile, the percent of students placing into Math 222 has dropped from 25% to 7% If both placements change at a linear rate, what will the percentage be when the percent of people...
*June 26, 2015*

**algebra**

A 24 question mathematics exam is worth 100 points. There are fill-in-the-blank questions worth 2 points each, multiple choice questions worth 6 points each, and long answer questions worth 5 points each. The number of fill-in-the-blank questions plus the number of multiple ...
*June 26, 2015*

**Algebra**

Walking Speed The avg. walking speed R of a person living in a city of population P in thousands is modeled by the function R(P)=0.37 times ln P + 0.05. where R is in feet per second. The populatin of Boston is 532,000, find the average walking speed of people living in boston.
*June 23, 2015*

**math**

convert to an exponential equation 3 = log(2, 8)
*June 23, 2015*

**ALGEBRA**

A BOATMAN ROWS TO A PLACE 48KM DISTANT AND BACK IN 14 HOURS; HE FINDS HE CAN ROW 4KM WITH THE STREAM IN THE SAME TIME AS 3KM AGAINST THE STREAM. FIND THE RATE OF THE STREAM?
*June 20, 2015*

**ALGEBRA**

a policeman is pursuing a snatcher who is ahead by 72 of his own leaps. the snatcher takes 6 leaps while the cop takes 5 leaps, but 4 leaps of the snatcher are as long as 3 leaps of the cop. how many leaps will the cop make before he catches the snatcher?
*June 20, 2015*

**ALGEBRA**

i have homeworks that in algebra, and those question i post are the questions i can't really solve
*June 20, 2015*

**ALGEBRA**

please help me
*June 20, 2015*

**ALGEBRA**

a policeman is pursuing a snatcher who is ahead by 72 of his own leaps. the snatcher takes 6 leaps while the cop takes 5 leaps, but 4 leaps of the snatcher are as long as 3 leaps of the cop. how many leaps will the cop make before he catches the snatcher?
*June 20, 2015*

**Alpha **

mr brown borrowed $5,340 from a bank at 10% aunnum simplr interest for 9 years. the sum of the money paid in interest to the bank and the total amount of money repaid to the bank
*June 18, 2015*

**Algebra**

a 2-liter bottle of Pepsi costs $2.19. A six pack of 12 oz cans costs $2.99, which is the better value and what is the total cost per ml? there are 29.6 ml in a fluid ounce.
*June 3, 2015*

**Algebra**

You drive up to Canada and notice that gas costs $1.31 per liter. The Canadian dollar is worth U.S. $1.02. How much will it cost you in american dollars to fill up your 12 gallon tank? What id the price per gallon up in Canada in American dollars?
*June 3, 2015*

**Algebra**

the space shuttle does one full orbit every 90 minutes and the earth is 25,000 miles around. What is the apparent speed of the space shuttle?
*June 3, 2015*

**Physics **

A pendulum swings back and forth up to a maximum height of 1.52 m. Neglecting friction, what is the speed of the pendulum at the lowest position. a) 2.7 m/s b) 3.9 m/s c) 5.5 m/s d) 30. m/s I thought the answer would be 0 m/s because it wouldn't move at the lowest position...
*May 11, 2015*

**Science**

How much force is exerted to lift 750 kg of water in the well against the force of gravity? How much work is done to lift this water .05m? How does this compart to hte work done byt he man in teh treadmill?
*April 25, 2015*

**Prealgebra**

Find the surface area of the prism. Round to the nearest tenth if necessary. The three sides are all 8.1 inches, the area of the base is 28.4 inches^2, and 12 inches is the length. It's a,b,c, or d. A. 348.4 in^2 B. 320 in^2 C. 291.6 in^2 D. 251.2 in^2
*April 24, 2015*

**algebra 2**

Three hundred and fifty-eight tickets to the school basketball game were sold. Student tickets were $1.50 and non-student tickets were 3.25. The school made $752.25. How many student tickets were sold?
*April 22, 2015*

**Algebra 2**

A chemist has a bottle of 1% acid solution and a bottle of 5% acid solution. She wants to mix the two to get 100 mL of a 4% acid solution. How much of each should she use?
*April 22, 2015*

**Statistics **

A sample of 53 night-school students' ages is obtained in order to estimate the mean age of night-school students. = 25.7 years. The population variance is 12. (a) Give a point estimate for mu. (b) Find the 95% confidence interval for mu (lower and upper limit). (c) Find ...
*April 2, 2015*

**Statistics **

By measuring the amount of time it takes a component of a product to move from one workstation to the next, an engineer has estimated that the standard deviation is 6 seconds. (a) How many measurements should be made to be 90% certain that the maximum error of estimation will...
*April 2, 2015*

**Statistics**

How large a sample should be taken if the population mean is to be estimated with 90% confidence to within $75? The population has a standard deviation of $892. So far I have n= (.2)(5)^2, but I don't think that's right....
*April 2, 2015*

**Latin**

anyways thank You for your help.....
*April 1, 2015*

**Latin**

well your not being very nice with the exclamation marks._.
*April 1, 2015*

**Latin**

well it would be more helpful -_- are you a tutor?
*April 1, 2015*

**Latin**

well its not my fault it doesn't let me put the website!
*April 1, 2015*

**Latin**

Day 1- 12 labors of Heracles greekmythology test prep
*April 1, 2015*

**Latin**

Ms. Sue
*April 1, 2015*

**Latin**

its a website but it doesn't let me put it
*April 1, 2015*

**Latin**

1. the second paragraph begins with the sentence " Offsetting his strength was a noticeable lack of intelligence or wisdom ". Use evidence from the text to support this claim. I NEED HELP
*April 1, 2015*

**chemistry **

The enthalpy of formation of MX is ΔHf° = –493 kJ/mol. The enthalpy of sublimation of M is ΔHsub = 143 kJ/mol. The ionization energy of M is IE = 437 kJ/mol. The electron affinity of X is ΔHEA = –317 kJ/mol. (Refer to the hint). The bond energy of ...
*March 16, 2015*

**chemistry**

OK thank you! I'm gonna ace this test!:)
*March 8, 2015*

**chemistry**

Yes I do know them but I don't get the parts with the parentheses. What do they mean?
*March 8, 2015*

**chemistry**

Write and balance each of the following equations, and then identify each by type. a) copper+chlorine-->copper(ll)chloride b) calcium chlorate--->calcium chloride+oxygen c)lithium+water--->lithium hydroxide+hydrogen d)lead(ll)carbonate--->lead(ll)oxide+carbon ...
*March 8, 2015*

**chemistry**

What do the parentheses mean like for example in lead(ll)oxide, though?
*March 8, 2015*

**chemistry**

Write and balance each of the following equations, and then identify each by type. a) copper+chlorine-->copper(ll)chloride b) calcium chlorate--->calcium chloride+oxygen c)lithium+water--->lithium hydroxide+hydrogen d)lead(ll)carbonate--->lead(ll)oxide+carbon ...
*March 8, 2015*

**Chemistry**

In de Broglie's equation w=wavelength w=h/mv how do i rearrange to solve for mass
*March 8, 2015*

**ELA**

ok thank you
*March 1, 2015*

**ELA**

in the article " Letter From Jackie Robinson on Civil Rights " for short response 1 I cant find what African americans want to recive and the details that support it. and for short response 2 I cant find how president Eisenhower unknowingly crush the spirit of ...
*March 1, 2015*

**algebra**

6(5y-4) 30y-24 -3+2(6z-3+4)
*February 24, 2015*

**science**

What are the transporters of protein in plants?
*February 18, 2015*

**physics**

A snowmobile is originally at the point with position vector 26.1 m at 95.0° counterclockwise from the x axis, moving with velocity 4.25 m/s at 40.0°. It moves with constant acceleration 1.73 m/s2 at 200°. After 5.00 s have elapsed, find the velocity vector, and ...
*February 4, 2015*

**Trigonometry**

point A and B are 100m apart and are of the same as the foot of a building. the angle of elevation of the top of the building from point A an B are 21 degrees and 32 degree respectively. how far is A from the building
*February 4, 2015*

**calculus**

Hello! Just needed help with understanding this specific question. We never really wet over Euler's method so I'm not sure how to go about it. "Use Euler's method in order to solve the initial value problem below. dy/dx = x-3 and y=4 when x=1 Use Euler's ...
*February 3, 2015*

**History**

1)C 2)D
*February 3, 2015*

**History**

In which Sumerian city was the most famous ziggurat located? A. Uruk B. Kish C. Lagash D. Ur
*February 3, 2015*

**Chemistry**

Assuming equal concentrations and complete dissociation, rank these aqueous solutions by their freezing points. CoCl3 K2CO3 KNO3
*January 29, 2015*

**calculus**

I needed help with this graphing calculator assignment; my sister took my calculator so I don't really have anything to work with, unfortunately. The graphing calculators online are really confusing and seem to require payment to work - so i'm pretty desperate. just ...
*January 20, 2015*

**economics**

if you could verify/falsify my answers on these multiple choice questions and possible give me insight on possible correct answers, that would be great. thanks! 1. Which is an acceptable market method of regulating negative externalities? A. Legal action against the source ...
*January 6, 2015*

**Geometry**

Original Statement "If it's a garage sale, then it's a Sunday." Statement 1 "If it's a Sunday, then it's a garage sale." Statement 2 "If it's not a Sunday, then it's not a garage sale." Statement 3 "If it's not a ...
*November 19, 2014*

**Human Geography**

Discuss the origin, diffusion, and impact on the cultural landscape for one of the following: A) folk housing styles in the United States. B) Buddhism in Asia. C) English in South Asia. Anyway I can get help with this? I have an FRQ due thursday and need help answering these.
*November 18, 2014*

**chemistry**

how many moles of no2 remain when 2.5 moles of n205 completely react
*November 3, 2014*

**English **

Read the following passage and identify at least 3 elements of figurative language; explain how each element brings out the theme of the passage. "The Wrong Place" by Susan Michalski Lana woke up, curled in a corner of the seat at the back of the train. She lifted ...
*November 2, 2014*

**Chemistry**

In a constant-pressure calorimetry experiment, a reaction gives off 20.8 kJ of heat. The calorimeter contains 150 g of water, initially at 21.4 degrees Celsius. What is the final temperature of the water? The heat capacity of the calorimeter is negligibly small.
*October 30, 2014*

**AP Chem**

NH3 + CO2 + H2O are introduced into an empty 1.00L vessel at 115 degrees. The initial partial pressure of at .500 atm. Calculate the number of moles of of solid (NH4)2CO3 that is present when equilibrium is established?
*October 28, 2014*

**AP Chem**

(NH4)2CO3 <-> 2NH3 + CO2 + H2O solid (NH4)2CO3 is placed in an evacuated container at 115C. When equilibrium is reached Kp = 1.93x10^-3. Extra NH3 gas is added, when equilibrium is reestablished, the partial pressure of NH3 is four times the partial pressure of H20. What...
*October 28, 2014*

**AP Chem**

solid (NH4)2CO3 is placed in an evacuated container at 115C. When equilibrium is reached the total pressure inside the vessel is 0.473 atm. Some solid remain in the vessel at equilibrium. Calculate Kp.
*October 28, 2014*

**chemistry**

1. A gas cylinder contains 0.722 mL of hydrogen gas at a pressure of 10.6 atm. If the gas is used to fill a balloon at a pressure of 0.960 atm, what is the volume of the filled balloon?
*October 28, 2014*

**Math**

A sixth grader weighs 90 pounds which is 120% of what he weighed in 4 th grade. How much did he weigh in 4th grade? 90x100=9000/120= 75 So he weighed 75lbs is this correct?
*October 5, 2014*

**Math**

In a parking lot 16% of the cars are blue. There are 4 blue cars in the lot. How many cars are not blue? 4x100=400\16= 25 then minus 4 blue cars to get the answer that 21 of the cars are not blue. I know the answer is 21 I'm just not sure if the work is correct?
*October 5, 2014*

**Calculus**

At what point does the normal to y=-5-1x+3x^2 at (1, -3 ) intersect the parabola a second time? Answer: Note: You should enter a cartesian coordinate. The normal line is perpendicular to the tangent line. If two lines are perpendicular their slopes are negative reciprocals -- ...
*September 24, 2014*

**Physics**

Obi-Wan lands his spacecraft on an unknown planet. Visibility is poor, so he isn't able to exactly determine on which planet he has landed. He finds someone on a local communications channel and asks for directions to Earth. "You are already on Earth," is the ...
*September 21, 2014*

**Physics **

The two masses shown in the figure are each initially 1.80 m above the ground, and the massless frictionless pulley is fixed 4.8 m above the ground. (mA = 1.5 kg and mB = 3.4 kg.) What maximum height does the lighter object reach after the system is released? [Hint: First ...
*September 21, 2014*

**math**

1. A grayhound's maximum speed is 39.35 mph how long does it take to run a quarter mile? 2. A human's maximum speed is 27.89 mph how long does it take to run a quarter mile? 3. A giant tortoise's maximum speed is 0.17 mph how long does it take to run a quarter mile...
*September 11, 2014*

**Science - Please Check My Answers**

on number one i got D i believe D is correct because i know C is wrong and everyone i have talked to has said D for the first one
*September 11, 2014*

**physics**

d1/t1
*September 11, 2014*

**physics**

A rocket rises vertically, from rest, with an acceleration of 3.2 m/s2 until it runs out of fuel at an altitude of 730m . After this point, its acceleration is that of gravity, downward.whats the maximum altitude does the rocket reach?
*September 10, 2014*

**Biochemistry**

If you make up a solution of 100mL of 0.1 M Hepes in the basic form, what will be the pH? pKa = 7.55
*September 8, 2014*

**physics**

Student throws a baseball at a large gong 79 miles away and hears the sound of gong 2.63333 seconds later. The speed of sound in air is 330 miles per second. What was the average speed of baseball on its way to gong ?
*September 3, 2014*

**math**

John and Mary Billings own a condominium with an assessed value of $110,000. If the tax rate is 25 mills per $1.00 of assessed valuation, how much tax do they pay?
*June 24, 2014*

**Statistics**

Who is the king of late night TV? An Internet survey estimates that, when given a choice between David Letterman and Jay Leno, 52% of the population prefers to watch Jay Leno. Suppose that you randomly select three late night TV watchers and ask them which of the two talk show...
*May 22, 2014*

**economics**

Looking for examples on the four production factors within a service environment
*May 20, 2014*

**English**

Which of the following sentences is grammatically correct? a.Only Bill wanted to go to the lake. [Intended meaning: Bill wanted to go to the lake, but no one else did.] b.Bill only hinted that he would help us move. [Intended meaning: Bill hinted but did not, for example, ...
*May 10, 2014*

**Investments**

P4.3 Assuming you purchased a share of stock for $50 one year ago, sold it today for $60, and during the year received three dividend payments totaling $2.70, calculated the following: (a) Income (b) Capital Gain (or loss) (c) Total Return in Dollars (d) Total Return as a ...
*April 24, 2014*

**Chemistry **

What volume in liters of C3H7Cl is produced if 400.0g of C3H8 (propane) reacts with excess chlorine gas according to the equation C3H8+ Cl2 --> C3H7Cl+HCl
*April 15, 2014*

**Math**

Jason Printing has $85,000 to invest. They can invest in Wilder Revenue at 10% compounded semiannually or at Cheapskate Investments at 9.8% compounded monthly. a) Calculate the two APYs and compare them to determine your answer. Make sure to distinguish which APY belongs to ...
*April 13, 2014*

**algebra**

A baseball player hits a ball toward the outfield. The height h of the ball in feet is modeled by h(t) = -16t2 + 22t + 3, where t is the time in seconds. In addition, the function d(t) = 85t models the horizontal distance d traveled by the ball. If no one catches the ball, how...
*April 1, 2014*