Friday
February 12, 2016

# Posts by sam

Total # Posts: 4,683

math
Thank you so much
July 5, 2013

math
No idea. Please help. Is 20 times 5/6 g reater than or less than 20? How do you do it? Second question What is 4/5 of 2/3?It shows a square and says find answer on the model. Any help, please
July 5, 2013

math
how do you do the following? 9/10 - ?= 17/30 and 3/10 + 4/5 = ? first time doing this . Thank you
July 3, 2013

phy
The fundamental interval of a thermometric scale is
July 2, 2013

phy
An ungraduated mercury thermometer attached to a millimeter scale reads 22.8 mm in ice and 242mm in steam at standard pressure. What will the millimeter read when the temperature is. 20oC?
July 2, 2013

Chemistry
A hard water sample contains 121 mg of CaCO3 per liter of water. Calculate the mass of Na3Po4 needed to remove all Ca^2+ ions from 2.50 L of the water sample? Please help! This question is already on here, but I don't understand the part where it says substitute expression...
July 1, 2013

math
got it. ty
June 28, 2013

math
what would be the order from greatest to least 0.181, 0.38 , 0.139, 0.319 . any help would be appreciated. TY
June 28, 2013

physics
5. A bowling ball (mass = 7.2 kg, radius = 0.13 m) and a billiard ball (mass = 0.45 kg, radius = 0.028 m) may each be treated as uniform spheres. What is the magnitude of the maximum gravitational force that each can exert on the other?
June 27, 2013

physics
A rocket of mass 4.36 × 105 kg is in flight near earth's surface. Its thrust is directed at an angle of 58.9° above the horizontal and has a magnitude of 9.61 × 106 N. Find the (a) magnitude and (b) direction of the rocket's acceleration. Give the ...
June 24, 2013

Financial Math Help? (Determine compound period)?
Future value of a \$200 deposit in an account that earns 6.25% annual interest is \$272.71 after 5 years. Determine the compounding period for this investment. My work: PV=FV(1+I/n)^ (-n) 200=272.71(1+0.0625/n)^-5n log0.73=log(1+0.0625/n)-5n This is where I got stuck. No idea ...
June 11, 2013

Maths
Hi, I am just doing some maths revision in light of my maths GCSE resit, which is very soon. I am sitting the higher paper for the first time, so some of the questions towards the end of the paper are very testing of my knowledge. At the moment I am going over past papers and ...
June 5, 2013

english 2
The paragraph below needs to be made more coherent. Use repetition, synonyms, and pronouns to link the sentences. Type the improved paragraph in the space provided on the following page Many cities are easily distinguished by their skylines. In such cities--New York and Paris...
May 30, 2013

Math (Circles)
Ok thats what I thought...thanks!
May 29, 2013

Math (Circles)
True or False If two circles have 4 common tangents, then the two circles intersect.
May 29, 2013

Geometric Series question? Help!?
A bouncy ball bounces to 2/3 of its height when dropped on a hard surface. Suppose the ball is dropped from 20 m. What is the height of the ball after the 6th bounce? Answer = 1280/729 m OR 1.75 m What is the total distance travelled by the ball after 10 bounces? 98.6 m So, I ...
May 29, 2013

Calculus
At noon, ship A is 10 nautical miles due west of ship B. Ship A is sailing west at 24 knots and ship B is sailing north at 19 knots. How fast (in knots) is the distance between the ships changing at 6 PM?
May 24, 2013

chem
At a pressure of 2 atm, hydrogen gas occupies a volume of 8 L. What pressure must the gas be under if the volume is increased to 10 L? Don't forget the units. im confused on how to set it up and plug the numbers in?
May 23, 2013

probability
a spinner has 5 sections and is spun 40 times. it lands on 2 six times. What is probability of spinning a 2?
May 20, 2013

science
where does the energy needed to heat up cold water come from?
May 19, 2013

math
An aircraft is flying in a straight line away from a person standing on the ground. The initial angle of elevation changes from 70 degrees to 30 degrees in 1 minute. What is the cruising speed of the aircraft if its altitude is 10,000 m?
May 17, 2013

math
how do you find the rate of change from x=-1 to x=0 on a graph function?
May 17, 2013

math
write each decimal as a mixed number.5.25 and 9.12 WAS never taught this. Thank you
May 15, 2013

math
write each mixed number as a decimal.3 and seven tenths. 4 and one half how??
May 15, 2013

math
1. ((9*9+5)/9 = (81+5)/9 = 86/9 2. (6*39 + 23)/39 = (234 + 23)/39 = 257/39 3. 5 3/4 4. 19/4 * 8/7 = 34/7 5. 311/15 -52/3 = (311-260)/15 =51/15 =17/5 6. 0 7. P = 70
May 14, 2013

Alegebra
A + B = 30 0.6A + 0.3B = 0.4(30) A + B = 30 6A + 3B = 120 -3A -3B = -90 6A + 3B = 120 3A = 30 3A/3 = 30/3 A = 10 10 + B = 30 10-10 + B = 30-10 B = 20 Or A = x B = 3-x , 0.4(30) 0.6x + 0.3(30-x) = 0.4(30) 0.6x + 9 -0.3x = 12 0.3x + 9 = 12 0.3x + 9-9 = 12-9 0.3x = 3 0.3x/0.3 = 3...
May 13, 2013

French
Alex will go to the library to study and Becca will go play soccer at the park for there weekend
May 13, 2013

French
i need to write a french conversation about going to places such as the cinema, library and do activities. i started off but i need help so far: A-Bonoujour Becca B- Salut Alex comment ca va? A- Ca va bien, et toi B-ca va tres bien A-Qu'est-ce que tu vas faire cet
May 13, 2013

math calculus
The demand function for a product is given by p = 10,000 [1 − (5/5 + e^−0.001x)] where p is the price per unit (in dollars) and x is the number of units sold. Find the numbers of units sold for prices of p = \$1000 and p = \$1500. (Round your answers to the nearest ...
May 10, 2013

history
What lessons from the past pertaining to the civil rights and women's movement from the past can we apply to the future?
May 9, 2013

math 160(buss calculus)
my homework is due in 1 hour Let x = 1 and Δx = 0.01. Find Δy. (Round your answer to five decimal places.) f(x) = x/x^2 + 5
May 4, 2013

math
a piece of land in the shape of a reguler pentagon has a perimeter of 400m.calculate one side
May 3, 2013

Chemistry
If you had a 200 ML container full of helium gas, and you transferred all of the gas into an empty 1.00 ml container, would the 1.00 ml container be full or only 1/4 full?
May 2, 2013

Chemistry
If you had a 200 ML container full of helium gas, and you transferred all of the gas into an empty 1.00 ml container, would the 1.00 ml container be full or only 1/4 full?
May 2, 2013

math
rectangular prism has a volume of 240 ft3. write two possible sets of dimensions for the prism
April 30, 2013

math
Please help me solve this question. Find the value of the annuity. a=1000 I=0.06,n=25? what is the future value of annuity? (round to the nearest cent.)
April 29, 2013

physics
a wheel radius 0.25 m is mounted on a frictionless horizontal axle. the moment of inertia of the wheel about the axis is 0.040. a light cord wrapped around the wheel supports the 0.50 kg of box. the wheel is released from the rest. what is the magnitude of acceleration of the ...
April 28, 2013

Chemistry
Why does the titration of terephthalic acid yield a mass of approximately half the molar mass?
April 27, 2013

math
I need help solving this equation please. Use the qudratic formula to find any x-intercepton the graph of the equation. Y=3x^2+9-1
April 24, 2013

Math
Adam left the airport and traveled toward the Capital. Elisa left one hour later traveling 50 mph in an effort to catch up to Adam. After traveling for 4 hours Elisa finally caught up. What was Adam's average speed?
April 23, 2013

English
Take the subject you explored in Part 1 of Submission 2 and narrow it down so that it can be covered in one paragraph. You might use one of the two techniques below. 1. Use one incident from the Answers column of your chart to illustrate an idea. Example: Writing Idea: Fads ...
April 23, 2013

math
What fraction is equivalent to 14/22
April 22, 2013

Algebra1
1. A bicycle racer covers a 75 mile training route to prepare for an upcoming race. If the racer could increase his speed by 5 mph, he would complete the same course in 3/4 of the time. Find his average rate of speed. 2. Nina drove for 6 hours at an average rate of 50 mph. ...
April 18, 2013

chemistry
Calculate the compositionof the gaseous mixture obtained when 1.25 mol f carbon dioxide is exposed to hot carbon at 800 degree celcius in a 1.25 liter vessel. The equilbrim constant kc at 800 degree celcius is 14 for the reaction CO2 + C = 2C0
April 18, 2013

math
Can you check my answer to see if i really get this word problem thing A camper leaves the campsite walking due east at a rate of 3.5 mph. Another camper leaves the campsite at the same time but travels due west. In two hours the campers will be 15 miles apart. What is the ...
April 18, 2013

Math
thank you, i have trouble "translating" a word problem to an equation, but thanks!
April 18, 2013

Math
Two towns are 420 miles apart. A car leaves the first town traveling toward the second town at 55 mph. At the same time, a second car leaves the other town and heads toward the first town at 65 mph. How long will it take for the two cars to meet?
April 18, 2013

Social studies
How did texas change their government and the way they earned their living after reconstruction?
April 16, 2013

Determine the maximum and minimum of each function on the given interval. a)  = 2x^3 − 9x^2 ,−2 ≤ x ≤ 4 b)  = 12x − x^3 ,  x∈ [−3,5]
April 15, 2013

Science need help ?????///
An astronomer observes two galaxies, A and B, which have redshifts of: Galaxy A = 0.020 and Galaxy B = 0.010. Which galaxy is closest to us and what is its distance away from us? You may assume that the Hubble constant is H0 = 75 km s–1 Mpc−1 and that the speed of ...
April 14, 2013

english
Is it more closely?
April 12, 2013

english
WRITE the adverb form that correctly completes the sentence. Hawks resemble falcons (close) of all birds.
April 12, 2013

Physics
A mirror produces an image that is located 50.0 cm behind the mirror, when the object is located 5.50 cm in front of the mirror. (a) What is the focal length of the mirror? (b) Is the mirror 1 - concave or 2 - convex? (Give the number of the correct answer.)
April 11, 2013

Combinations and Permutations, Steve and Ms. Sue☺
#8. the answer is 6,840 yourwelcome.
April 10, 2013

math
There are 27 students in Mrs. Reeds class. The number of boys and number of girls are both composite numbers. There are 3 more girls than boys. How many girls and how many boys are in the class?
April 10, 2013

math
11 and 13. Thank you. We didnt learn prime and composite numbers but still have homework on it.
April 10, 2013

math
There are 24 students in Mr.Hills class. The number of boys and number of girls are both prime numbers. There are 2 more boys then girls. How many boys and how many girls are in each class?
April 10, 2013

Chemisrty
What volume of oxygen, measured at STP, can be prepared by heating 2.16g HgO?
April 10, 2013

math
What are the intersection points of y = 1/x and y = 1/x^2? Is it x = 0 and x = 1? Thank You
April 9, 2013

Math Systems
I cannot solve these last three systems. Could you show me the work for them so i understand how to do them. 1) x-y=1 2x+y=5 3x-4y=2 2) 5x+8y+6z=14 2x+5y+z=12 -3x+6y-12z=20 3) x^2+2xy-2y^2=-11 x^2+xy-2y^2=-9
April 6, 2013

Accounting
How would the journal entry look if you sold a 8% bond with a face value of \$11,000 for \$9,500? Bond will mature in 10 years.
April 5, 2013

Math
What is next number in series: 100 96 104 88 120 56
April 4, 2013

calculus
Use a graph of f(x) = 3 e^{-8 x^2} to estimate the x-values of any critical points and inflection points of f(x). critical points x= Inflection points x= Next, use derivatives to find the x-values of any critical points and inflection points exactly. critical points x= ...
April 3, 2013

write an equation for a rational function whose graph has all of the indicated features: -vertical asymptote with equation x=3 -horizontal asymptote with equation y=2 -hole at x=1 no x intercept thank you
April 2, 2013

calculus
Consider a window the shape of which is a rectangle of height h surmounted by a triangle having a height T that is 1.1 times the width w of the rectangle If the cross-sectional area is A, determine the dimensions of the window which minimize the perimeter. h = w =
April 1, 2013

Analytical Chemistry
Current is applied to an aqueous solution of calcium sulfide. Multiple choice help please??! What is produced at the cathode? A) H2(g) B) S(s) C) O2(g) D) Ca(s) What is produced at the anode? A) O2(g) B) H2(g) C) Ca(s) D) S(s)
March 30, 2013

Physics
A molecule of DNA (deoxyribonucleic acid) is 2.01 µm long. The ends of the molecule become singly ionized: negative on one end, positive on the other. The helical molecule acts like a spring and compresses 0.75% upon becoming charged. Determine the effective spring ...
March 30, 2013

Physics
Direction is 45° however not getting correct magnitude to help sorry
March 30, 2013

Science
How is playing on a seasaw an example of the scientific definition of work
March 27, 2013

Physics
A stainless-steel orthodontic wire is applied to a tooth, as in the figure below. The wire has an unstretched length of 3.42 cm and a radius of 0.14 mm. If the wire is stretched 0.13 mm, find the magnitude and direction of the force on the tooth. Disregard the width of the ...
March 26, 2013

math
pat gave \$24 to mary and linda in the ratio 1:3. how much money does linda get?
March 26, 2013

math
Thank you. Our teacher just gave us this problem and did not show us how to do the second part.
March 25, 2013

math
The Carsons are putting a rectangle swimming pool in their yard. It will measure 20ft by 12ft. They plan to have a cement walkway around the pool which should measure 4 ft wide. What is the area of the walkway?
March 25, 2013

Physics
A 3.6 kg ball strikes a wall with a velocity of 9.3 m/s. The ball bounces off with a velocity of 7.9 m/s in the opposite direction. If the ball is in contact with the wall for 0.4 seconds, what is the constant force exerted on the ball by the wall?
March 25, 2013

fundamental of management
young innovative or high tech firms often adopt the strategy of ignoring history of attempting to do something radically new.in what ways will this strategy help them?in what ways will this strategy hinder them/
March 25, 2013

management
young innovative or high tech firms often adopt the strategy of ignoring history of attempting to do something radically new.in what ways will this strategy help them?in what ways will this strategy hinder them/
March 25, 2013

physics
A 0.7 kg object is at rest. A 6.5 N force to the right acts on the object during a time interval of 3.7 seconds. What is the velocity of the object at the end of this interval?
March 25, 2013

math
I wold like to know if I have this answer right? Factor the trinomial competely. x^2-x-2 My answer is (x-2)(x+1)
March 24, 2013

math
Mark averaged 60 miles per hour during the 30-mile trip to college. Because of heavy traffic he was able to average only 40 miles per hour during the return trip. What was Mark's average speed for the round trip?
March 24, 2013

math
After six biology tests, Ruben has a mean score of 73. What score does Ruben need on the next test to raise his average (mean) to 75?
March 24, 2013

Finite Math
The reading list for a literature class has 6 fiction and 8 nonfiction books. A student is to write a report on 5 books from the list during the semester. The report must include at least 1 and at most 4 reports of fiction books. In how many ways can the selection of books be ...
March 23, 2013

Math
I've read over it, but I still don't understand how to add together bulbs from the Mandelbrot sets. Please help? I need to know how to add the 1/4 bulb to the 1/6 bulb and the 1/8 bulb to the 1/6 bulb. Thank you!
March 22, 2013

Chemistry
A 5.0-g Sample of KBr at 25.0 degrees celsius dissolves 25.0 mL of water also at 25.0 degrees celsius. The final equilibrium temperature of the resulting soltution is 18.1 degrees celsius. What is the enthalpy of of solution in kilojoules per mole of KBr?
March 20, 2013

Calculus - Optimization
The cost of fuel for a boat is one half the cube of the speed on knots plus 216/hour. Find the most economical speed for the boat if it goes on a 500 nautical mile trip.
March 20, 2013

chemistry
if the molar mass of BaCl2 is 208.3 g/mol, how many grams are present in 0.25 moles?
March 19, 2013

math/ratios
There are 77 students in the student council. The ratio of girls to boys is 7:4. How many girls are in the student council?
March 18, 2013

math/ratios
There are 77 students in the student council. The ratio of girls to boys is 7:4. How many girls are in the student council?
March 18, 2013

math
There are 77 students in the syudent council. The ratio of girls to boys is 7:4. How many girls are in the student council?
March 18, 2013

Algebra 1
Can you please help me with this question? I put parenthesis to make it look less confusing. (10)/(x)-(10)/(x-3)=(-3)
March 18, 2013

science help?
(a) One such reaction fuses two nuclei of carbon-12 ( 6 12C ) to form an atom of neon ( 10 20Ne ) with the emission of an α-particle. Write an equation for this process, indicating the atomic number and mass number of each of the products in the usual way. (b) Another ...
March 18, 2013

14. touch 17. A or D?? 18. developing more confidence 19. matter-of-fact
March 15, 2013

I will give the questions and my answers. Someone check it please. Read the passage below and answer the questions that follow. To the Top “Great works are performed, not by strength, but by perseverance.” -Samuel Johnson Have you ever wanted to give up on something ...
March 15, 2013

Language Arts
I will give the questions and my answers. Someone check it please. Read the passage below and answer the questions that follow. To the Top “Great works are performed, not by strength, but by perseverance.” -Samuel Johnson Have you ever wanted to give up on something ...
March 14, 2013

Chemistry
Indicate the concentration of each ion or molecule present in a mixture of 45.5 mL of 0.274 M NaCl and 65.5 mL of 0.0246 M (NH4)2CO3. Assume that the volumes are additive. [Cl-] [NH4+] [CO32-]
March 13, 2013

Chemistry
What mass of silver chloride can be prepared by the reaction of 160.0 mL of 0.25 M silver nitrate with 110.0 mL of 0.20 M calcium chloride? Calculate the concentrations of each ion remaining in solution after precipitation is complete. (Enter a 0 if none of the ion remains.) ...
March 13, 2013

Chemistry
Indicate the concentration of each ion present in the solution formed by mixing the following. Assume that the volumes are additive: 3.60 g of KCl in 76.5 mL of 0.274 M CaCl2 solution [K+] = [Cl-] =
March 13, 2013