Friday

October 9, 2015
Total # Posts: 552

**math**

geologists estimate that earths temperature rises about 10 degrees celsius for every kilometer k below earths surface. suppose it is 50 degrees celsius on the surface of the earth. What is the formula for the temperature t in degrees celsius at a dept of k km?
*October 5, 2015*

**physics**

A rock is dropped from a tree of height 22 m into a lake (depth 4.0 m) below. After entering the water, the rock floats gently down through the water at a constant speed of 1.4 m/s to the bottom of the lake. What is the total elapsed time?
*October 4, 2015*

**science**

True or False? Can someone check to see if I am correct. If not, why? a) Two samples of matter have the same volume must have the same density FALSE: could have different densities b) two samples of matter having the same volume and the same number of particles must have the ...
*September 26, 2015*

**Science**

True or False? Can someone check to see if I am correct. If not, why? a) Two samples of matter have the same volume must have the same density FALSE: could have different densities b) two samples of matter having the same volume and the same number of particles must have the ...
*September 26, 2015*

**science**

The modern atomic model includes electrons orbiting the nucleus. Which of the following parts of Dalton's atomic model was disproved by the discovery of the electron? - Atoms are tiny particles. - Atoms cannot be divided into smaller parts . - Atoms have specific mass and ...
*September 23, 2015*

**Math**

Geddy has a pool with a volume of 25.0m^3. It costs $2.35 per cubic foot (ft^3) to clean. How much will it cost to clean the pool?
*September 22, 2015*

**language arts**

ms. sue please help the characterization of the children is an important part of "The Story-Teller". which of the following quotes from the story offers the best evidence for the character of Cyril being mischievous? A. the children moved reluctantly to the window. &...
*September 16, 2015*

**Math**

the area of a square is equal to one less than one-half its perimeter. How long is each side? (A=s squared and P=4s, where s represents the side length of the square)
*August 29, 2015*

**5th grade math**

need in layman's terms, please, thank you
*August 20, 2015*

**Math**

but the 2 isn't divisible by 5?
*August 20, 2015*

**Math**

yes, it does, thank you
*August 20, 2015*

**Math**

thanks so much :)
*August 20, 2015*

**Math**

so it's 9,405,271? I'm the Grandmother and this 5th grade work is beyond me. thank you
*August 20, 2015*

**Math**

you are right, 9,805,472
*August 20, 2015*

**Math**

7 digit number no repetition of numbers digit 5 in thousands place, greatest digit in the millions place, digit in the hundred thousands place is twice the digit in the hundreds place, digit in the hundreds place is twice the digit in the ones place, digit in the tens place is...
*August 20, 2015*

**Math**

this is way out there for us, she's only in 5th grade, but thank you
*August 20, 2015*

**Geometry**

Anybody?
*June 22, 2015*

**Geometry**

A carpenter checks to see if a board is warped by laying a straightedge across the board in several directions. State the postulate that is related to this procedure.
*June 22, 2015*

**Language Arts**

Does anyone have the correct answers for #1-6 and #8-18
*May 16, 2015*

**math**

2.If a sledgehammer that weighs 18 newtons on Earth will weigh about 4 newtons on the planet Namar, then your weight on Namar would be about ___ times your weight on Earth. A. 0.25 B. 4 C. 0.5 D. Not enough information
*May 14, 2015*

**math**

thxs
*May 13, 2015*

**math**

never mind
*May 13, 2015*

**math**

is it $3.75 because the unit rate is $2.50/1 and to get 10 you multiply the denominator, 1, by 15 and what u do to the bottom you do to the other so $2.50*15=37.5 and it equals 37.5/10 which is 3.75
*May 13, 2015*

**math**

At Frugal Foods a loaf of bread cost about $1 in 1980. In 2013, the loaf of bread cost $2.50. 1.A ratio is a comparison of two amounts by division. What is the ratio of the cost of a loaf of bread in 2013 to the cost in 1980? *$2.50/1 2.Assuming the price of clothing increased...
*May 13, 2015*

**math **

maya made a sign with an area of 48 square centimeters What could her sign look like
*May 5, 2015*

**chem**

For the reaction: N2+3H2<--->2NH3 4.000 mol N2, 2.000 mol H2, and 6.000 mol NH3 are placed in a 2.000 L container and allowed to reach equilibrium. When equilibrium is established the [H2]=2.77 M. Calculate the equilibrium concentrations of nitrogen and ammonia. ...
*April 19, 2015*

**chem**

For the reaction: N2+3H2 <-----> 2NH3 1.000 mol N2 and 1.000 mol H2 are placed in a 1.000 L container and allowed to establish equilibrium. When equilibrium is established the [N2] =0.921M. Calculate the equilibrium concentrations of hydrogen and ammonia. Calculate K.
*April 19, 2015*

**chem**

For the reaction: A+B <-----> 2C (all gases) 2.0 mol A, 2.8 mol B and 1.0 mol C are placed in a 2.0 L container and allowed to reach equilibrium. When equilibrium is established [C]=0.75 M. Calculate all equilibrium concentrations. Calculate K. I am so confused!
*April 19, 2015*

**math**

June has twice as much money invested at 5% simple annual interest as she does at 4 %. If her year income from the two investment is $315 how much does she have at each rate?
*March 20, 2015*

**English**

11- Before Derrell made a serious purchase, such as a car, he would study the competition?
*March 16, 2015*

**English**

10- Before finishing the meeting, the chair of the group offered many ideas?
*March 16, 2015*

**English**

8- We should consider traveling to China this summer?
*March 16, 2015*

**English**

@Ms Sue
*March 16, 2015*

**English**

could 6 be The faculty had made recommendations for the honor society?
*March 16, 2015*

**English**

I know the answers to 3, 5, 7, and 9
*March 16, 2015*

**English**

Identify awkward or pretentious diction in the following sentences, and revise each sentence as necessary to improve clarity. 2. Let’s have a discussion of the essay you read for homework. 3. Khaya finally came to the realization that she preferred research to teaching. 4...
*March 16, 2015*

**science**

A charge of +9.0 nC and a charge of +4.0 nC are separated by 50.0 cm. Find the equilibrium position for a −1.0 nC charge as a distance from the first charge. The Coulomb charge is 8.98755 × 109 N · m2 /C 2 . Answer in units of cm.
*March 13, 2015*

**Chemistry**

I need to use those numbers to find the final concentrations for each individual solution.
*February 24, 2015*

**Chemistry**

I have to use the given concentration of 7.03 micromoles/liters to determine the concentration for the following dilutions. 1. mL stock solution-2 mL distilled water-8 2. mL stock solution-4 mL distilled water-6 3. mL stock solution-6 mL distilled water-4
*February 24, 2015*

**English**

@ms sue, how about "How did the pilot know where in the air he was?"
*February 18, 2015*

**English**

Identify the simple sentences in the following paragraph. I know the first and third sentences are simple. The air show announcer hushed. He had been squawking all day, and now he quit. The crowd stilled. Even the children watched dumbstruck as the slow, black biplane buzzed ...
*February 18, 2015*

**geometry**

i need help on a question that involves finding the "value of the variable" ive started the question but im stuck of how to continue .its a right triangle which hypotenus length is cut by a altitude line "w+9" .the lengths cut are 8 and 18 .
*February 11, 2015*

**Science**

California's volcanoes formed as a result of colliding boundaries.
*February 6, 2015*

**Chemistry**

the titration of an ascorbic acid requires 18.5 mL of .0105 M KIO3. how many mmol of ascorbic acid were in this sample?
*February 4, 2015*

**English 10 help please**

metaphoe
*November 18, 2014*

**Trig**

the angle of elevation to the sun is 65 degrees. A building casts a shadow 16m long. What is the height of the building to the nearest meter?
*November 17, 2014*

**Algebra**

You invest an initial $4,500 in an account that has an annual interest rate of 4.5%, compounded daily. How much money will you have in the account after 10 years? Round your answer to the nearest whole number.
*November 12, 2014*

**calculus**

Use l'hopital's Rule to evaluate lim x in 0 of (4x(cos 6x-1 )) / sin 3x-3x
*November 8, 2014*

**math**

Richard put a counter on 6. He counted by tens. what are the next 3 numbers he counted? My answer is: 16, 26, 36
*November 3, 2014*

**calculus**

never mind i got it thanks
*November 3, 2014*

**calculus**

A spotlight on the ground is shining on a wall 24m away. If a woman 2m tall walks from the spotlight toward the building at a speed of 1.2m/s, how fast is the length of her shadow on the building decreasing when she is 4m from the building?
*November 3, 2014*

**Algebra**

Find the dimensions of the rectangle of the largest area that can be enclosed by 200 meters of fencing
*October 27, 2014*

**calculus**

The volume of a cube is increased from 729 cubic centimetres to 849.285 cubic centimetres. Use differentials to determine: a) by approximately how many centimetres the side length of the cube increases ? B) by approximately how many square centimetres does the surface area of ...
*October 12, 2014*

**Calculus**

The volume of a cube is increased from 729 cubic centimetres to 849.285 cubic centimetres Use differentials to determine : (a) by approximately how many centimetres does the side length of the cube increase? (b)by approximately how many centimetres does the surface area of the...
*October 11, 2014*

**Logic**

mushroom & purple => poisonous mushroom & poisonous => purple mushroom & ~purple => ~poisonous mushroom & purple => ~poisonous
*October 6, 2014*

**physics**

An electron travels 2.7 m in 6.37 × 10−8 s. How fast is it traveling?
*September 30, 2014*

**CHEM**

In the preparation of a rock salt solution, 1.522 grams of impure rock salt was dissolved in 50.0 ml of distilled water. The total mass of the solution was found to be 51.522 grams. Calculate the weight percent of impure rock salt in the prepared solution.
*September 26, 2014*

**math**

9805472
*September 24, 2014*

**math**

I have a 15ft board I need to cut into 2 1/8 inch pieces how many can I cut
*September 17, 2014*

**Maths**

How would you convert 11 minutes into hours?
*September 14, 2014*

**Grade 10 Maths**

An area for planting crops is given by: A = 800 + 20x - 1/2x^2 Find the value of x which the area is a maximum
*September 11, 2014*

**physics**

bob pursley, can you answer my question. SCIENCE BIOLOGY. My name is Julia. THanks. I have till 12 am. HELPPPP
*September 3, 2014*

**SCIENCE:BIOLOGY>**

bELIEVE ME OR NOT BUT i'M PRETTY SURE I HAVE MINE RIGHT.THX FOR YOUR HELP ..NOT! tHANKS DR.bOB222
*September 3, 2014*

**SCIENCE:BIOLOGY> **

1. How many seconds do you spend in school during the week (6.5 hours/day)? 2. How many micrograms are in 12 dekagrams? 3. How many centimeters are in 5 kilometers? 4. 3.25 liters are equal to how many kiloliters? 5. how man meters are in 0.65 hectometers? 6. How many grams ...
*September 3, 2014*

**chemistry**

Dr.Bob can you answer my questions. My name is Julia.. my topic is in Science:Biology
*September 3, 2014*

**History/ English**

please help!
*September 3, 2014*

**History/ English**

What does the novel 1984 by George Orwell teach us about history? In what ways is Winston a historian?
*September 3, 2014*

**math**

Determine whether the system of equation is in row-echelon form. x-y+3z=-11 y+8z=-12 z=-2
*June 17, 2014*

**Math**

A hair product company sells three types of hair products for $30, $20, and $10 per unit. In one year, the total revenue for the three products was $800,000, which corresponded to the sale of 40,000 units. The company sold half as many units of the $30 product as units of the...
*June 17, 2014*

**Chem**

Oops 0.10 mol NaOH
*May 27, 2014*

**Chem**

When 1.10 mol of NaOH is added to 1.00 L of 0.30 M HCl the pH of the resulting mixture is: a) 0.52 b) 0.70 c) 1.00 d) 13.30
*May 27, 2014*

**Scientific Method**

B is the correct answer
*May 25, 2014*

**English**

Choose the answer that identifies the function of the gerund in the sentence. Yes, this player has worked hard on improving his strength this season.
*May 24, 2014*

**Chemistry**

Thanks :)
*May 17, 2014*

**Chemistry**

Explain why methyl red would be a good indicator for a titration of 0.25M NaOH with .025M HNO3, but a poor choice for use in a titration of 0.25M NaOH with 0.25M HCN. I'm pretty sure the first step is to find the pH of the two titrations (and then compare those to the pH ...
*May 17, 2014*

**math**

I'd convert it to minutes. 14x60=840 (plus the 3 minutes)=843minutes Divide 843 by 3 = 281minutes Then convert back to hours and minutes... 281 divided by 60 = 4hr (leave out the decimals since they represent the left over minutes) 4x60=240 (this is the time already ...
*May 17, 2014*

**Math**

175g AgCl x (1 mol/247.9g) x (1 Ag2S/2AgCl) x (143.4g/1 mol) = 50.615g Ag2S I'm assuming you've learned about basic stoichiometry and how to use mole bridges? Otherwise this type of question wouldn't be asked.
*May 17, 2014*

**math **

Terry wants to buy one pair of moccasins. She can choose from some that costs $22.50, $27.00, $20.95, and $24.75. How much will Terry save if she buys the least expensive instead of the most expensive pair?
*April 29, 2014*

**MATH**

Thank you.
*March 26, 2014*

**MATH**

14% of what number is 84?
*March 26, 2014*

**CHEM**

Can you show me the formula I need to do this problem. please a solution is made by dissolving 0.35 mole of LiI in enough water to give a final volume of 2.60 ml. What is the molarity of the solution? thank you
*March 25, 2014*

**CHEM**

can you show me the formula for this problem. calculate the grams of NaOH present in 9.0 ml of a 8.0 (m/v) NaOH solution. thank you
*March 25, 2014*

**chemistry**

Calculate the concentration in % (m/m) of a solution containing 20.5 g of LiF dissolved in 340.0 g of H2O. a.1.14% (m/m) b.5.69% (m/m) c.6.03% (m/m) d.6.42% (m/m)
*March 23, 2014*

**chemistry**

In which of the following pairs of ionic compounds are both members of the pair soluble in water? a.AgNO3 and AgCl b.LiOH and Li2SO4 c.PbSO4 and BaCO3 d.NH4I and Sn3(PO4)2
*March 23, 2014*

**Math**

Write in order from least to greatest. +3,-1,-4,+2,0
*March 18, 2014*

**Physics**

Block A in the figure weighs 48.0N . The coefficient of static friction between the block and the surface on which it rests is 0.250. The weight w is 6.00N and the system remains at rest. -Find the friction force exerted on block A. -Find the maximum weight w for which the ...
*March 8, 2014*

**physics**

A driver drives 2.5 hours at an average speed of 48MPH. What distance does she travel in this time?
*February 10, 2014*

**physics**

A driver drives 2.5 hours at an average speed of 48MPH. What distance does she travel in this time?
*February 10, 2014*

**,;**

i believe that its D, because meat is more fatt-ning
*February 8, 2014*

**math**

If x varies inversely withy 3, and x=6 when y=3, find x when y=2.
*February 4, 2014*

**math**

A robotic basketball player tosses a ball upward from a height of 7 feet, at an initial speed of 111 feet per second. The height of the ball is modeled by the equation: h=−16t2+111t+7, where h is the height above the ground in feet and t is the time measured in seconds. ...
*February 4, 2014*

**math**

You are putting a brick walkway along two sides of a rectangular garden that measures 6 meters by 15 meters. The path will run the length of the garden, turn the corner, and run along the width. You only have enough brick to cover 46 square meters. How wide should the border be?
*February 4, 2014*

**Math**

Mushrooms produce a tremendous number of spores. However, very few spores go on to establish a new mushroom colony. A "colony" is actually a little bunch of fuzzy-looking cells called a mycelium. Let's say a particular mushroom produces a billion spores in a day...
*January 1, 2014*

**Math**

Uncle Joe made chocolate chip cookies. Eric ate fifty percent of them right away. Ryan ate fifty percent of what was left. Ten cookies remain. How many cookies did Uncle Joe make?
*January 1, 2014*

**Math**

There are three hundred students at Mackenzie Middle School in Brain City. If 57% of the students are female, what is the ratio of female students to male students? Answer in lowest terms
*January 1, 2014*

**Math**

The local election is over and a new mayor has been elected to lead Big Town. The new mayor received three votes for every vote received by her opponent. The new mayor received 2,541 votes. How many votes did her opponent receive?
*January 1, 2014*

**Physics**

A train is moving parallel and adjacent to a highway with a constant speed of 27 m/s. Ini- tially a car is 60 m behind the train, traveling in the same direction as the train at 41 m/s and accelerating at 5 m/s2. What is the speed of the car just as it passes the train? Answer...
*October 16, 2013*

**Physics**

r << 1.3e-4
*October 15, 2013*

**physics**

KE = (1/2)(m)(v)^2 = (0.5)(4)(5)^2 = 50 J Constant friction force encountered: N = (0.94)(4)(10) = 37.6 N Energy absorbed by friction: Fd = 37.6x Energy absorbed by the spring: =(1/2)(17)(x)^2 =8.5x^2 Final Equation: 50 = 8.5x^2+37.6x 0 = 8.5x^2+37.6x-50 Solve the quadratic ...
*October 15, 2013*

**physics**

r^3 << (3*(C_1)^2)/(4*pi*C_2*oil density*g) r^3 << (3)*(2.30e-4)^2 / (4)(3.14)(0.88)(660)(10) r << 1.3e-4
*October 15, 2013*