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Posts by anonymous

Total # Posts: 108,948

economics
What is SA government providing and to whom?

Statistics
c seems very far off

Statistics
Number of hospital acquired infections ( x 100) / total number of discharges (including deaths)

Statistics
The hospital-acquired infection rate (including newborns) is___________ A. 0.03% B. 0.30% C. 3.00% D. 30.00 I believe the formula it was given gave me B. 0.30%

Math
A party mix is made by adding nuts that sell for ​$2.50per kg to a cereal mixture that sells for ​$11 per kg. How much of each should be added to obtain 30 kg of a mix that will sell for ​$2.10per​ kg?

Riddle
I am something, I appear first on earth, second in heaven. I appear twice in a week, Never in a month, but I appear once in a year what am I?

Calculus
What is the best substitution to make to evaluate the integral of the quotient of cosine of 2 times x and the square root of the quantity 5 minus 2 times the sine of 2 times x, dx? u = sin(2x) u = cos(2x) u = 2x u = 5 ? 2sin(2x)

Math
Write the equation of a parabola, in standard form, that goes through these points: (0, 3) (1, 4) (-1, -6) ax^2 + bx + c = y a * 0^2+b*0+c = 3 a*1^2+b+1+c = 4 a*(-1)^2+b(-1)+c = -6 c = 3 a + b + c = 4 a – b + c = -6 a + b + 3 = 4 a – b + 3 = -6 Graph the parabola ...

civics
what is constitution? in hindi

Economics
You want to have an income of $50,000 per year in retirement, and you think you will be alive for 30 years in retirement. How much do you need to have invested the day you retire, in real dollars, assuming a 3% real rate of return? I just need to make sure I'm doing this ...

Math
Select all that are true With which information can you construct more than one triangle? The measurements of two angles The measurements of two angles and the length of the included side The measurement of all angles The lengths of two sides and the measurement of the ...

math
Evaluate: 2:2.5

Math
1. Given the following polynomial: 2x^2 + 7x - 15 = 0 Check all that apply. ? The value of the discriminant is 169. ? There are 2 real roots. ? There are 2 irrational roots. ? The graph intersects the y-axis twice. ? The parabola is directed upward. ? The axis of symmetry is ...

algebra
-11 less then or equal too 1-4w

chemistry
a sample of phosphorous has 0.5 moles of P4 molecules 1]how many P4 molecules are there? 2]how many P atoms are there? 3]how many moles of P atoms are there in the sample? 4]what is the mass of the sample?

Science
A bullet blasts from the barrel of a gun upward in the vertical direction with an email initial speed of 700m/s .Find the maximum altitude reaches by this bullet and the time needed the reach it.

science
Resistance = §L/A a) Increasing length by 20% means the total resistance increases by 20%, because as per the formula they are directly proportional. b) Resistance is inversely proportional to area. If the diameter is increased by 20%, so is the radius. And as per the ...

chemistry
The fuel used in many disposable lighters is liquid butane, C4H10. Butane has a molecular weight of 58.1 grams in one mole. How many carbon atoms are in 2.50 g of butane?

English
You might start: My weakness is multi-faceted. I'm lazy; I don't read; I don't think; I don't write; I want others to do my work for me.

math
what would have a greater surface area? a cylinder that is flat and smooth or a cylinder that is threaded? I think the smooth one will because the threads remove area that needs to be covered?

chemistry
Sodium carbonate (Na2CO3) has a molar weight of 105.9885 g/mol. A solution contains 50. mM sodium ions and 25 mM carbonate ions. What is the concentration of sodium carbonate in the solutions as expressed as mass/volume percentage?

physics
And and climb up 5 stairs , each of width 20 cm and height 20 cm . Find the distance covered and displacement of ant ?

Economics
A monopolist is deciding how to allocate output between two markets thata separated geographically. Demands for two market are P1=15-Q1 and P2=25-2Q2. The monopolist's TC is C=5+3(Q1+Q2).What are*price *output *profit *MR Ifa)the monopolis can price discriminate? b)the law...

algebra
Johnny starts his hike at his car site. He will take a break halfway between the car site and the campsite and then head on to the campsite. Use the diagram below to answer the questions. (a graph of a coordinate plane. the max number for x is 13 and max number for y is 11. a ...

Math
A is the Amount A = Ai e^-kt when A/Ai = .5, t = 24,000 so .5 = e^-24,000 k ln .5 = -24,000 k -.693 = -24,000 k so k = 2.888 * 10^-5 now we can do any old time t at t = 10,000 = 10^4 A/Ai = e^-2.888*10^-5 *10^4= e^-.2888 = .749 as a percent that is 74.9%

Physics
which is 3

Physics
average speed = (6+0)/2

Physics
Suppose the sprinter continues to run at 6m/s until the end pf the race. After crossing the finish line the sprinter decelerates at 2m/s^2.a) how long it takes her to stop b) how far does the sprinter travel while stopping?

Time rates
A ladder 20 ft long is leaning against an embankment inclined 60 degrees to the horizontal. If the bottom of the ladder is being moved horizontally toward the embankment at 1 ft/sec, how fast is the top of the ladder moving when the bottom is 4 ft from the embankment?

Economics
Description of the market form in which milk producers operate

science
ruthie walks 45 m east, and then moves 40 m west. if east is chosen as the positive direction, what is ruthie's resultant displacement?

Physics
A car travels at a speed of 70km/h. What distance will it cover in 30 minutes

Chemistry
Which three-centred ? molecular orbitals are occupied in NO2-? Select all that apply.

Algebra
Let S stand for student price and A for adult price. 60S + 20A = 450 20S + 32A = 340 Multiply second equation by 3. 60S + 96A = 1020 Subtract first equation from revised second. 76A = 570 A = $7.50 Insert value into first equation to find S.

math
Michael is 63 years younger than Dana. 7 years ago, Dana's age was 4 times Michael's age. How old is Michael now?

physics
the linear expansively of the material of a cube is 12*10-6k. if the length of each side of the cube is 10cm,find the area of one face of the cube and the volume of the cube when its temperature is raised by 30k

Health Care Statistics
A census is defined as which of the following? A. A collection of data B. A survey conducted with a small group C. A bureau of research specialists D. A count of a particular population B. I did my studying and it sows survey but I am hesitant of the choice since its saying ...

Physics
85-65 = 20 = half a wavelength 183 - 123 = 60 = 1 1/2 wavelengths natch ;) so wavelength = 40 cm = 0.40 meters period = 1/779 seconds so speed = distance/time = .4 *779 = 311.6 m/s awful cold there

Physics
Two speakers send out sound in phase at a frequency of 779 Hz. When you are the same distance from both speakers you hear a maximum sound. Moving around, you hear essentially no sound when you are 65 cm from one and 85 cm from the other, and again when you are 123 cm from one ...

Physics
Two instances during which the heating effects of electric current is not required pls

math
An elevator starts out at the 1st floor. It goes up 4 floors, down 2 floors, up 5 floors, down 3 floors, up 2 floors and stops. What floor is it now on?

Math
A student is asked to find positive integer solutions to this equation: 2 * 3 ?x = 5 ?y What is the smallest possible value of xy? (Please show working out, thank you.)

Math-Algebra
Tony asked his friend to guess his mathematics test score. He gave these hints to help his friend guess: -It has two digits -The digit in the tens place is two more than twice the digit in the ones place. -The number formed by reversing the order of the digits is 5 more than 3...

math
a + bc = -1 b + ac = -1 c + ab = -1 Which of these values of 'a' is one solution for this system of equations? A) -2 B) -1 C) 0 D) 2 Please also explain how you got the answer, thanks.

Time rates
sand is being dragged at the rate of 10m^3/min into a conical pile. if the height of the pile is always twice the base radius, at what rate is the height increasing when the pile is 2m high?

satistics
Suppose that the antenna lengths of woodlice are approximately normally distributed with a mean of 0.2 inches and a standard deviation of 0.05 inches. What proportion of woodlice have antenna lengths that are more than 0.27 inches? Round your answer to at least four decimal ...

math
hailey is tryin to win the grand prize spinnin a wheel labeled 1 throuh 6 and hope she gets a 5 or should she roll a 2 and hope she gets the same number onb both cubes explain

math-precalculus
A person starts walking from his home. First, he goes 2 miles north and 3 miles west to a park. After spending the afternoon at the park, he walks 1 mile west and 4 miles south to a bar. How far is the bar from his home?

math
a farmer examines 25 cartons of eggs 3 contain cracked eggs whats the best prediction that in the number of cracked eggs in the delivery of 500

Math
a farmer examines 25 cartons of eggs 3 contain cracked eggs whats the best prediction that in the number of cracked eggs in the delivery of 500

algebra 2
the two numbers is 9, the sum of their squares is 41. what is the lager number

economics(gentle man) thankyou
i have already done their graph but i want their mathematical expression

economics(gentle man) thankyou
Define the following term using graphs and mathematical expression a)utility b)util c)iso cost d)indiffernce curve e)budget line f)monopolist g)kiked demand curve h)social exploitation i)profit j)perfect competation market.

ECONOMICS(help!)
Prove that the profit maximation of the consume i.e MU=P,according to cardinalist using mathematical derivation.

Economics(help!)
Suppose you are the manager of a watch-making firm operating in a comptetive market.You cost of production is given by C=100+Q^2,Where Q is the level of output and C is total cost. a)If the price of watches is birr 60,how many watches should you produce to maximize profit? b)...

clothing and textile
What is conspicuous and inconspicuous facing

physics
Instances where the heating effect of current is not required. Plssss helllp

physics
Instances where the heating effect of current is not required. Plssss helllp

algebra
What was the error in my calculation on B?

algebra
Forgot to post the Modeled by part: h = -16t^2 + 60t

algebra
back from break, need help again The height , h, in feet, of a bottle rocket is modeled by: where t is the time in seconds. A. Factor the expression. H = -16t^2 + 60t = 4t(-4t + 15) B. What is the height of the rocket after 2 seconds? When t = 2 H = 4t(-4 times 2 + 15) = 28 C...

MATH
A theater has a seating capacity of 1050 and charges $5 for children, $7 for students, and $9 for adults. At a certain screening with full attendance, there were half as many adults as children and students combined. The receipts totaled $7650. How many children attended the ...

Math
write the equation of the hyperbola in graphing form from the given information: Vertices at (2,0) and (-2,0); foci at (3,0) and (-3,0)

Algebra
(need help with checking answers) The height , h, in feet, of a bottle rocket is modeled by: h = -16t^2 + 60t where t is the time in seconds. A. Factor the expression. H = 16t^2 +60 = 4(4t^2 + 15) B. What is the height of the rocket after 2 seconds? H = 4(4 times 2^2 + 15) = ...

Science
You Add a g to My word and I disappear so what word AM I?

physics
Which of the substances Exhibited the greatest molecular forces between water,acetone,methylated spirits and sunflower oil???

physics
A person standing on a vertical cliff a height h above the lake wants to jump into the lake but notices a rock just at the surface level with its furthest edge a distance s from the shore .The person realizes that with a running start it will be possible to just clear the rock...

Math
In fig AB=AC NB and angle ACD= 110 find angle A

Math
-10 is greater than -7

English
What does the child think about his drawing in the poem

Algebra
The height , h, in feet, of a bottle rocket is modeled by: H = -16t^2 +60t where t is the time in seconds. A. Factor the expression. B. What is the height of the rocket after 2 seconds? C. What is the height of the rocket after 3.75 seconds? Explain the solution.

Algebra
The height , h, in feet, of a bottle rocket is modeled by: where t is the time in seconds. A. Factor the expression. B. What is the height of the rocket after 2 seconds? C. What is the height of the rocket after 3.75 seconds? Explain the solution.

physics
A ball is dropped downward after 1 sec its velocity is 20m/s another ball is dropped from the same point after 2 sec its velocity will be

english
What is the purpose of a response-to-literature essay

history
What were some of the strategies that the NAACP and others employed to influence President Roosevelt and the government?

stat
wolf has an average weight of 44 lbs. with a standard deviation of 3 lbs. what percent of wolves weigh under 40 lbs.?

Physics 1st paper
Two vectors of magnitude 8 unit each are acting at a point making an angle120 degree with each other.determine the magnitude

Maths
If sina+7sinb=4 (sinc+2sind) and cosa+7cosb=4 (cosc+2cosd), how do I prove that 2cos(a-d) =7cos(b-c)?

phisical science
what is the role of mass in newtons second law?

chemistry
Write the anode reaction for the electrolysis of the concentrated zinc chloride solution using zinc electrodes

Calculus
S=integral sign S3x(4-x^2)^1/2 use trig substitution I am confused I got x sin(sin^-1(x/2))+cos(sin^-1(x/2))

Calculus
(1,1)(2,1)(2,3) mirror Revolve around y-axis. solve with Shell and washer please and thank you! Made a correction for washer would R(x)=2x-1 ? what about r(x)

Calculus
revolve around y

Calculus
(1,1)(2,1)(2,3) mirror around y-axis & revolve solve with Shell and washer please and thank you

math
Express this ratio as a fraction in its lowest term ?25cm to 3m.

Algebra
1. Draw an algebra tile model for the polynomial in simplified form: 8x^2 - 4x -3x^2 + 6 + 2x -7 8 big blue squares, 4 bars, 3 big red squares, 6 little yellow squares, 2 green bars, 7 little red bars; (is this correct?) 2.Study the diagram of algebra tiles below. 3 big blue ...

Health Care Statistics
swing bed hospital is more on the same side of what i was thinking

Health Care Statistics
long term care hospital is more reasonable choice?

Health Care Statistics
A hospital that is allowed to use its beds for either acute care or skilled care is referred to as a _____. A. Swing bed hospital B. Tertiary care hospital C. District hospital D. Long term care hospital E. None of the above, it should be

Health Care Statistics
Computers are great for performing statistical calculations, but they must be programmed accurately to calculate correctly. When is statistical data considered “garbage” and how do you correct it? help?

geomtry
A parallelogram is transformed according to the rule (x, y) → (x, y). Which is another way to state the transformation

Math
A map has a scale of 2 cm for every 25 miles. The distance on the map between Griffin Park and the San Diego Zoo is 10 cm. How far is the actual distance?

Physics
Two particles are moving in a plane; one has the velocity component vix=1m/s, viy=5m/s and the other has the velocity components v2x=4m/s and v2y=3m/s if both started from the same point what is the angle between their paths

physics
a boat heads directly across a river with a speed through the water 8m/s. the river current is 2m/s a. what is the magnitude and direction of the boat velocity relative to the earth? b.when the boat reaches the other bank, how far will it be?

math-precalculus
Eliminate the parameter t to find a Cartesian equation in the form x=f(y) x(t)=4t^2 y(t)=4+2t

Chemistry - Naming
What would be the name of this compound? Si4Br8

Chemistry - Ionic Compounds
List all possible unit formulas (chemical formulas) that can be constructed by the formation of binary ionic compounds from the following elements. (Separate substances in a list with a comma.) Br (Z = 35), Sr (Z = 38), Ca (Z = 20), Ga (Z = 31), O (Z = 8) Please help! I have ...

maths
It costs a publishing company $50000 to make books. The $50000 is a fixed cost or a cost that cannot change. To help the publishing company sell the books, a marketing company charges $4 for each book sold. If the company sells the book for $9 each, how many books should they ...

Math
Solve using eliminating method2) 3x-5y=15 x-2y=8

math
a one meter square sheet of cardboard is cut into the maximum number of squares of side one millimeter. If these squares would be laid side by side, how far would they stretch?

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