Wednesday

August 27, 2014

August 27, 2014

Total # Posts: 252

**Physics**

David, who is 65 kg, is driving his car at a speed of 25 m/s. He sees a dog crossing the road and so he steps on the brake to avoid hitting it. His seatbelt brings his body to a stop in 0.4 s. What magnitude of force does the seatbelt exert on him?
*August 25, 2014*

**Physics**

02. Comic-strip hero Superman meets an asteroid in outer space and hurls it at 800 m/s, as fast as a bullet. The asteroid is a thousand times more massive than Superman, yet in the comic strip, he remains stationary after releasing the asteroid. Say, his mass is 107 kg, what ...
*August 25, 2014*

**math**

compare write >or< for 2,854,376 to 2,845,763
*August 21, 2014*

**finance**

A quaint but well established cafe shoppe in the new hot cafe wants to build a new cafe for increased capicity it expect sales are $800,000.00 for the first 5 years, direct cost including labor and material 50% for new cafe will be totaled at $750,000.00 which will depreciate ...
*August 17, 2014*

**SAT math**

A family of 2 parents and 4 children is eating lunch at a rectangular table with 2 chairs on each side and one chair on each end. In how many ways can they be arranged if the two parents sit in the two end chairs? a. 12 b. 30 c. 36 d. 48 e. 720
*April 5, 2014*

**Algebra**

first set up a regular proportion: 5a/x = 20 ohms/ 25 ohms Because the problem says the current varies inversely you would flip only one side of the proportion: 5A/xA = 25 ohms/ 20 ohms cross multiply: 100 = 25x ohms Divide by 25: x = 4A
*March 1, 2014*

**math**

208 square root to nearest hundredth.
*February 24, 2014*

**math**

255 square root to the nearest hundredth.
*February 24, 2014*

**math**

130 square root to the nearest hundredth.
*February 24, 2014*

**Math**

X^ -3 = 216 How do you find x?
*December 18, 2013*

**information technology**

How does the organizational strategy drive the IT strategy?
*November 29, 2013*

**SAT math**

The slope of the line passing through p and q is -3/5. What is the value of x? P(1,4) Q(x,1)
*November 2, 2013*

**Math**

The slope of the line passing through p and q is -3/5. What is the value of x? P(1,4) Q(x,1) I got 6 but Im not sure
*November 2, 2013*

**SAT MATH**

if x^2 - y^2 = 77 and x + y=11 what is the value of x?
*October 12, 2013*

**Math**

if 5x + 7y = 18 and 2x - 4y = 6, what is the value of 7x + 3y? a. 7 b. 12 c. 19 d. 24 e. 31
*October 5, 2013*

**math **

if the sum of 7 integers is even, at most how many of these integers could be odd? a. 3 b. 4 c. 5 d. 6 e. 7
*October 5, 2013*

**Earth Science**

thanks!
*September 29, 2013*

**Earth Science**

A contour (topographic) map indicates that a stream is flowing across a landscape. If the stream has a constant volume, where on the map would the stream most likely have the highest velocity? a. As the stream moves across several closely spaced contour lines b. as the stream ...
*September 29, 2013*

**Math**

if the line containing the points (a,3) and (b,2) has a slope of 1/7, then a-b=
*September 14, 2013*

**science**

2 students were testing the amount of fertilizer that would best promote the growth of strawberries in a garden. What is an unavoidable error they can make during this process?
*August 29, 2013*

**Biology**

. 2 students were testing the amount of fertilizer that would best promote the growth of strawberries in a garden.List an unavoidable source of experimental error
*August 22, 2013*

**biology**

identify and describe how organism could respond to an external stimulus
*August 14, 2013*

**Trig**

Given that csc θ = -4 and tan θ > 0, find the exact value of a. x b. sin θ c. cos θ d. r e. sec θ f. cot θ
*August 7, 2013*

**Trig**

Given that tan θ = - (√3/8) and θ is in QII, find the exact value of a. r = b. csc θ c. cos θ d. cot θ
*August 7, 2013*

**Trig**

Given that cos θ = 5/13 and θ is in QIV, find the exact value of a. y b. sin θ c. sec θ d. tan θ
*August 7, 2013*

**Math**

thanks
*August 5, 2013*

**Math**

At Uriah's coffee shop, the amount of ground coffee beans left in stock on a given days a function of the amount of coffee sold that day. If "c" is the number of cups of coffee sold, and "z(c)" is the number of ounces of ground coffee left in stock, ...
*August 5, 2013*

**SAT math**

In the figure shown above (its a right triangle), points G, H, and I in the xy-plane have coordinates of (0,2), (2,8) and (8,n), respectively if GH=HI what is the value of n?
*August 5, 2013*

**Algebra**

True or False and please explain so that I can understand. 1. The rationalized form of 125 over the square root of 14 involves no radicals. 2. The radical square root of 4 cannot be used to rationalize the denominator of any radical number.
*August 5, 2013*

**POL 201 American National Government**

under the budget reform act the Presidency may defer spending appropriated funds if congress fails to act within 45 days of being notified about the deferment (b) may never dfer spending appriopriated funds (c) spend more that was allocated (d) does not need to request ...
*July 28, 2013*

**Algebra**

True or False. The fifth root of a positive integer is sometimes irrational. Please give an example or a counterexample so that I can understand it fully.
*July 26, 2013*

**Math**

True or False. The value of the square root of 16 is greater than the cube root of 29.
*July 21, 2013*

**Algebra**

True or False. 1. If the radicand is a multiple of a perfect square number, then the radical is not in its simplest form. 2. The value of the cube root of -1/8 is not a real number because the radical is negative. 3. The fifth root of a negative number is not a real number.
*July 19, 2013*

**chemistry**

When 30.0g of aluminum reacts with HCl, how many grams of aluminum chloride are formed? Al + HCl --> AlCl3 + H2
*July 15, 2013*

**chem**

Calculate the mass in grams of carbon needed to produce 160 g of CO2 in burning: C + O2 --> CO2
*July 15, 2013*

**Math**

Are these true or false? 1. If s is negative, then the square root of s^2 is -s. 2. If r is positive, then the square root of r^2 is -r. 3. If q is negative, then the square root of q^2 is q. 4. If p is positive, then the square root of P^2 = p. If possible, kindly give me ...
*July 15, 2013*

**Lincoln College Of New En**

A survey by Men’s Health magazine stated that 14% of men said they used exercise to reduce stress. Use a = 0.10. a random sample of 100 men was selected and 10 said that they used exercise to relieve stress. Use the P –value method to test the claim. Could the ...
*April 26, 2013*

**Lincoln College Of New En**

it has been found that 85.6% of all enrolled college and university students in the U.S. are undergraduates. A random sample of 500 enrolled college students in a particular state revealed that 420 of them were undergraduates. Is there sufficient evidence to conclude that the ...
*April 26, 2013*

**Lincoln College Of New En**

The percentage of physicians who are women is 27.9% in a survey of physicians employed by a large university health system, 45 of 120 randomly selected physicians were women. Is there sufficient evidence at the 0.05 level of significance to conclude that the proportion of ...
*April 26, 2013*

**Lincoln College Of New En**

the Old Farmer’s Almanac stated that the average consumption of water per person per day was 123 gallons. To test the hypothesis that this figure may no longer be true, a researcher randomly selected 16 people and found that they used on average 119 gallons per day and s...
*April 26, 2013*

**Lincoln College Of New En**

the average 1-ounce chocolate chip cookie contains 110 calories. A random sample of 15 different brands of 1-ounce chocolate chip cookies results in the following calorie amounts, at the a = 0.01 level, is there sufficient evidence that the average calories contents is greater...
*April 26, 2013*

**math**

Find the distance around the track if x=20 feet and y=25 feet
*April 21, 2013*

**STATISTICS**

the percentage rates of home ownership for 8 randomly selected states are listed below. Estimate the population variance and standard deviation for the percentage rate of home ownership with 99% confidence. 66.0 75.8 70.9 73.9 63.4 68.5 73.3 65.9
*April 19, 2013*

**STATISTICS**

A random sample of stock prices per share (in dollars) is shown. Find the 90% confidence interval for the variance and standard deviation for the prices. Assume the variable is normally distributed.
*April 19, 2013*

**STATISTICS**

the percentage rates of home ownership for 8 randomdomly selected states are listed below. Estimate the population variance and standard deviation for the percentage rate of home ownership with 99% confidence. 66.0 75.8 70.9 73.9 63.4 68.5 73.3 65.9
*April 17, 2013*

**Lincoln College Of New En**

26 Gasoline Mileage for Autos and Trucks – Of the top 10 cars and trucks based on gas mileage, 4 are Hondas, 3 are Toyotas, and 3 are Volkswagens. Choose one at random. Find the probability that it is Japanese, Japanses or German or not foreigh.
*April 6, 2013*

**chemistry**

draw particle diagrams that account for the fact that 2 volumes of nitric oxide gas react with 1 volume of oxygen gas to form 2 volumes of product with no leftover gas
*April 5, 2013*

**Lincoln College Of New En**

How man 4 letter code words can be made using the letters in the word pencil if repetitions are permitted?
*April 4, 2013*

**statistics**

a pizza shop owner wishes to find the 95% confidence interval of the true mean cost of a large plain pizza. how large should the sample be if she wishes to be accurate to within $0.15? a previous study showed that the standard deviation of the price was $0.26
*March 17, 2013*

**Geometry**

Assuming that the circumference of each circle passes through the centers of the other two, and that the radius of each circle is 1, what is the total combined area?
*March 14, 2013*

**gepmetry**

given coordiantes for one endpoint and midpoint find the other endpoint? endpoint is (-3,3/7) midpoint is (-2,-11/7)
*March 12, 2013*

**chemistry**

a 23.8 g sample of unknown metal heated at 100 degrees c is placed in 50.0 mL of water at 24 degrees c resulting in 8.5 c temperature increase. What is the specific heat of the metal
*March 12, 2013*

**English**

I need to come up with a new character for Disneyland for my english homework. Does anyone have any good ideas
*March 11, 2013*

**Chemistry**

Yes, I couldn't find it, sorry! Thankssss!
*March 10, 2013*

**Chemistry**

Phosphoric acid, H3PO4(aq), is a triprotic acid, meaning that one molecule of the acid has three acidic protons. Estimate the pH, and the concentrations of all species in a 0.300 M phosphoric acid solution. kPa1: 2.16 kPa2: 7.21 kPa3:12.32 [H3PO4] = ? [H2PO4-] = ? [HPO42...
*March 10, 2013*

**Chemistry**

In a 1.0× 10–4 M solution of HClO(aq), identify the relative molar amounts of these species. (most to least) H2O HClO H3O OH- OCl-
*March 9, 2013*

**Chemistry**

Phosphoric acid, H3PO4(aq), is a triprotic acid, meaning that one molecule of the acid has three acidic protons. Estimate the pH, and the concentrations of all species in a 0.300 M phosphoric acid solution. pKa1: 2.16 pKa2: 7.21 pKa3: 12.32 Hint: Convert the pKa values to Ka ...
*March 9, 2013*

**algebra**

A rock is thrown upward with a velocity of 15 meters per second from the top of a 26 meter high cliff ad i misses the cliff on the way back down. when will the rock be 5 meters from the water below?
*February 15, 2013*

**Physics 212**

Three equal point charges, each with charge 1.50\mu C , are placed at the vertices of an equilateral triangle whose sides are of length 0.300m . What is the electric potential energy U of the system? (Take as zero the potential energy of the three charges when they are ...
*February 14, 2013*

**Social studies**

how was the metis'list of rights different from the charter rights and freedom?
*February 8, 2013*

**science**

water in gas form is called
*January 8, 2013*

**math**

danielle plays softball and basketball. however because she like basketball more, she spends 3 times as long playing basketball than she does playing softball. if she spends 18 hours a week playing these sports, how much time does she devote tp playing basketball? a)13 hours b...
*December 31, 2012*

**chemistry **

What is the number of water molecules that will form from 30 g of NO
*December 22, 2012*

**Physics 111-1**

A wheel, starting from rest, has a constant angular acceleration of 1.8 rad/s2. In a 3.7-s interval, it turns through an angle of 52 rad. How long has the wheel been in motion at the start of this 3.7-s interval?
*November 18, 2012*

**Brenau University**

To: From: Date: Subject: Observation Methodology: A. Description of internal control: (What did you observe?) B. Objective of internal control: (Why was the control implemented? There may be more than one reason.) C. Tie to accounting records: (What was impact on accounting ...
*November 17, 2012*

**intergrated science**

Explain why ionic compounds are formed when a metal from the left side of the periodic table reacts with a nonmetal from the right side. Give two examples of such compounds
*November 17, 2012*

**Psychology**

While the blood flow that is used by the brain is redirected to the body, the brain does not get the necessary oxygen that it needs to think. Explain how this physiological process affects higher order thinking. Remember that the prefrontal lobe is most affected by the lack of...
*November 5, 2012*

**Maths**

I got the last question so please dont worry.. These are the ones I get confused with. 7y +21 x - 15 = 4y- 12 + 13 I need to see the numberical working out asap if someone would be so kind .. thanks P
*October 14, 2012*

**Maths**

I was to work out what y equalled. But I have it now.. thank you so much Reiny.. I have posted a new question..
*October 14, 2012*

**Maths**

7y = 49w - 35 I am not sure how the working out goes
*October 14, 2012*

**Living Environment **

How one type of atom (carbon)can be the basis of so many types of biomolecules?
*October 8, 2012*

**Reading ASAP**

1. IV 2. iv 3. DV 4. DV 5. IV
*October 8, 2012*

**math**

Explain why there is no number that can replace n to make the equation /n/ = -3 true.
*October 7, 2012*

**Physics**

An elevator is moving at 1.1 m/s as it approaches its destination floor from below. When the elevator is a distance h from its destination, it accelerates with a = −0.81 m/s2, where the negative sign indicates a downward vertical direction.
*September 21, 2012*

**math**

A year on Mars is 686 Earth Days. (1) Whicch is longer, a year on Mars or a year on Earth. (2) By how many weeks is it longer? Please explain how you got the answer. My answer was 82 1/2 weeks longers
*September 4, 2012*

**Chemistry**

I got the first two right but I cant figure out ph=14
*May 9, 2012*

**Biology**

I estimated a possum population to be 260. It was later found that the possums rather enjoyed being trapped because of the tasty food used as bait. Does this mean the population estimate may be too high or too low?
*March 29, 2012*

**math**

find two rates for each given rate: 1) 18people/12people 2) 1.5 miles/ 2.4 minutes please help sooooo confused
*March 22, 2012*

**science **

If Deneb and Rigel were located at alpha Centauri's distance from earth, how would they appear? PLEASEEE HELPPPPPP!!!!!!!!!!
*March 21, 2012*

**science**

thanks
*March 21, 2012*

**science **

why does a cool, distant, supergiant star such as Betelgeuse have such a high apparent magnitude? PLEASE HELPPPPP!!!!!!
*March 21, 2012*

**science **

what would be the absolute magnitude and color of a main sequence star with a temperature of 25,000 kelvin? HELP!
*March 21, 2012*

**Chemistry**

Sometimes as a solute dissolves in a solvent, the solute molecules dissociate to some extent. Sometimes solute molecules associate to form larger molecular units, such as dimers or trimers. Discuss the effect of dissociation and of association on the apparent molecular weight ...
*March 1, 2012*

**chemistry**

A sample of Nitrogen is collected over water at 26 Celsius. What is the partial pressure of nitrogen if the total pressure is 99.4 kPa and the partial pressure of water vapor at 26 Celsius is 25 torr
*February 7, 2012*

**grammar**

Almost half the staff is a Texas certified teacher. or Almost half the staff are Texas certified teachers.
*December 12, 2011*

**science**

Please help with this as I can not understand it at all. Imagine you've been shown a seismogram from an earthquake on which you can see the first arrival of P waves, followed some time later by the first arrival of S waves. You work out that the S wave arrived 5 minutes ...
*November 4, 2011*

**Chemistry**

Ok, thank you very much for trying. It was to do with a whole load of calculations working out the titration and purity etc. I think I'll just leave it and ask my teacher. Thank you again. Paula
*October 26, 2011*

**Chemistry**

My teacher got this for her results? 90.0% ± 1.27% 90.0% + 1.27% = 90.014 90.0% - 1.27% = 89.988 Her number I think she was getting the percentage from was 20.00 cm3 I am very confused?
*October 26, 2011*

**Chemistry**

Hi, This may sound like a dumb question but I am stuck. I have worked out everything from a titration and I am now trying to work out my overall % purity. It is 86.0% +/- 1.3% What will 86.0% + 1.3% be and what will 86.0% - 1.3% be?
*October 26, 2011*

**health**

waht are 4 subsidiaries of tricare
*October 21, 2011*

**math 9th grade**

the perimeter of a rectangle is 56 inches the width of the rectangle is three-fourth of the length. Find the length of the diagonal of the rectangle. please help me!!!
*October 9, 2011*

**math 9th grade**

the perimeter of a rectangle is 56 inches> the width of the rectangle is three-fourth of the length. Find the length of the diagonal of the rectangle. please help me!!!
*October 9, 2011*

**Mathamatics**

find the value of r in terms of T (2r+ 3T)/2 = (2r-T)/3 please help me!
*October 9, 2011*

**math**

Dave pays two-fifth of his salary for rent, 16% of the salary for grocery and one-fourth of the salary for travel. He saves the remaining $1,368. How much does he earn? Can anybody help me?
*October 9, 2011*

**Math**

four times the difference or two posotive integer numbers is equal to half the sum of the numbers. If one of the numbers is 14, what is the other number? I just cant get this can anyone help me?
*October 9, 2011*

**Math**

I dont know how to solve this math problem? A call center is 120 yd. long and 40 yd. wide. Each employee requires 30 sq. ft. if the center needs to have 40% of open space, how many employees can be seated in the center?
*October 9, 2011*

**chem**

sorry density of water is 1.0 g/ml
*October 4, 2011*

**chem**

need help with the following conversion Calculate the mass in pounds of one gallon of water given that the density of water is .0 g/ml
*October 4, 2011*

**english**

Is gone the past and past participle tense of the word go?
*July 24, 2011*