Thursday
December 18, 2014

Posts by ANONYMOUS


Total # Posts: 75,677

Fractions Math
Fiona and camila took a load of peaches to the farmers market. During the first hour , they sold 1/2 of the peaches plus 1/2 of a peach. In the second hour, they sold 1/3 of the remaining peaches plus 1/3 of a peach. In the third hour , they sold 1/4 of what was left and 3/4 ...
October 26, 2014

Calculus
Let f(x)=(2x+1)^3 and let g be the inverse function of f. Given f(0)=1, what is the value of g'(1)? A. -2/27 B. 1/54 C. 1/27 D. 1/6 E. 6
October 26, 2014

Calculus
If f(x)=sinx and g(x)=cosx, then the set for all x for which f'(x)=g'(x) is: A. Pi/4 + k(pi) B. Pi/2 + k(pi) C. 3pi/4 +k(pi) D. Pi/2 + 2k(pi) E. 3pi/2 + 2k(pi)
October 26, 2014

Calculus
If r is positive and increasing, for what value of r is the rate of the increase of r^3 twelve times that of r? A. Cubed root 4 B. 2 C. Cubed root 12 D. 2 sqrt 3 E. 6
October 26, 2014

chemistry
To identify a diatomic gas (X2), a researcher carried out the following experiment: She weighed an empty 3.4-L bulb, then filled it with the gas at 1.40atm and 25.0 ∘C and weighed it again. The difference in mass was 5.5g . Identify the gas.
October 26, 2014

Psychologic
Becoming a parent is associated with an initial increase in happiness followed by a decrease in happiness back to, or sometimes dipping below, pre-parenthood happiness levels.
October 26, 2014

French
How do you say "This is a form of exercise in French"?
October 26, 2014

chemistry
Nitride has a charge of -3, while sodium has a +1 charge. Thus, a molecule of sodium nitride would need three sodium ions to counteract the -3 charge. The molecule would be Na3N
October 26, 2014

Calculus
C = 2πr C' = 2π [This equals the rate at which the circumference is changing] A = πr^2 A' = 2πr [This equals the rate at which the area is changing] A' = 2C' 2πr = 2(2π) 2πr = 4π r = 4π/2π r = 2 So, the answer ...
October 26, 2014

Calculus
The radius of a circle is increasing. At a certain instant, the rate of increase in the area of the circle is numerically equal to twice the rate of increase in its circumference. What is the radius of the circle at that instant? A. 1/2 B. 1 C. Sqrt 2 D. 2 E. 4
October 26, 2014

math
F = 3K F = E + 15 K = E - 1 You can plug in either 3K or (E+15) for F, so now you've got this equation: 3K = E + 15 We know that Kevin = E - 1, so we plug that in for K: 3(E-1) = E + 15 3E - 3 = E + 15 2E = 18 E = 9 [So, Eileen must be 9] Plug in 9 for E to find Kevin'...
October 26, 2014

PHYSICS (VECTOR)
46 km/h [Horizontal] ---> \. | .\.| ..\v -474.8 km/h [Vertical] We're trying to find the angle in the top left corner of the triangle above. We already have the lengths of the two legs, so we'd do this using tan. Tan(x) = Opposite/Adjacent Tan(x) = (-474.8)/(46) = -...
October 26, 2014

math
P varies directly as the square root of q. P=8 when q =25 find p when q = 100
October 26, 2014

physics
Depends on what the acceleration and initial velocity are. Here's an equation that might help with that: Vf = Vo + at (Where vf = final velocity, vo = initial velocity, a = acceleration, and t = time) Assuming the car is starting from rest, this would be your equation: Vf...
October 26, 2014

physics
how much will the velocty of a car be in 24 seconds
October 26, 2014

Math
There's only one way to arrange 19 cubes such that a rectangle is formed, and that's by lining them all up in one 19-cube row. So, 1.
October 26, 2014

physics
x = t^4 - 6t^2 + 9t Take the derivative to get the velocity. v = 4t^2 - 12t + 9 Take the derivative again to get acceleration. a = 8t - 12 Now, let's shift to force formulas. F = ma If a = 0, F = 0. Therefore, the net force on the locomotive is equal to zero at the time ...
October 26, 2014

physics
The position of a toy locomotive moving on a straight track along the x-axis is given by the equation x = t4 − 6 t2 + 9 t , where x is in meters and t is in seconds. The net force on the locomotive is equal to zero when t is equal to
October 26, 2014

physics
A copper (Young's modulus 1.1 x 1011 N/m2) cylinder and a brass (Young's modulus 9.0 x 1010 N/m2) cylinder are stacked end to end, as in the drawing. Each cylinder has a radius of 0.14 cm. A compressive force of F = 4800 N is applied to the right end of the brass ...
October 26, 2014

Chemistry
Element X consists of two major isotopes with the following percent abundances and atomic masses: 35.0% and 85.0 amu; and 65.0% and 84.0 amu. Calculate the average atomic mass of element X.
October 26, 2014

chemistry
which unit is used to express the pressure of gas?
October 26, 2014

French
Yes, but is either of them correct?
October 26, 2014

French
Is it grammatically correct to say "Un prof enseigne les/des élèves"?
October 26, 2014

Physics
A solid wood door, 90.0 cm wide by 2.00 m tall has a mass of 35.0 kg. It is open and at rest. A small 500-g ball is thrown perpendicular to the door with a speed of 20.0 m/s and hits the door 60.0 cm from the hinged side. The ball rebounds with a speed of 16.0 m/s along the ...
October 26, 2014

physics
1- An elevator, when fully loaded, has a mass of 5500 kg. The elevator needs to accelerate anywhere from 2.7 m/s^2 [D] to 2.7 m/s^2 [U]. What is the maximum tension force that the elevator cable will need to support during normal use? can we use fnet principle here, so when ...
October 26, 2014

physics
A 83 kg person is hanging off the edge of a cliff, holding a rope. A 101 kg person is on the top of the cliff holding the other end of the rope. Find the minimum coefficient of static friction that would prevent the 83 kg person from falling.
October 26, 2014

chemistry
2.) If you pass 10.0mL of a 50.0mL solution of [Co(en)2Cl2]Cl that has been reduced with Zn through a cation exchange column, you will obtain a solution that has three H+ ions for every Co3+ ion that was originally present in the sample. These H+ ions are titrated with 0.10-M ...
October 26, 2014

math
all the seats in two sections of a movie theater are occupied. in one section there are 8 row with 18 seats in each row.
October 26, 2014

Math
Can someone please check these problems? Thank you! Solve each equation for the indicated value. 1. a-b=-c, for a I got a=-c+b 2. 4y+6x=12, for y I got y=-3/2x+3
October 26, 2014

Chemistry
The combustion of propane and oxygen produces carbon dioxide and water. What mass of water is produced from the combustion of 10.4g of propane, C3H8
October 26, 2014

Math
Thank you so much
October 26, 2014

Math
Find the exact interest on a loan of $32,400 at 7% annually for 30 days.
October 26, 2014

social studies
why did Deganawida think it was important to stop fighting?
October 26, 2014

Chemistry
Find the enthalpy change of the following reactions 2C+2H2O---> CO2+CH4 Using the following reactions with their change in H values. C+H2O---->CO+H2 H=+131.1kjmol-1 Co+H2O---->CO2+H2. H=-41.2kjmol-1 CH4+H2O--->CO+3H2 H=15.3
October 26, 2014

Chemistry
Find the enthalpy change of the following reactions 2C+2H2O---> CO2+CH4 Using the following reactions with their change in H values. C+H2O---->CO+H2 H=+131.1kjmol-1 Co+H2O---->CO2+H2. H=-41.2kjmol-1 CH4+H2O--->CO+3H2 H=15.3
October 26, 2014

physics
If an object is initially moving with a constant velocity of 20m/s towards positive x-axis and after 5 sec it changes its direction and moving at an angle of 30o with x-axis, find magnitude and direction of its acceleration.
October 26, 2014

chemistry
The reaction of 2.5 mol of O2 with 4.6 mol of C3H8 will produce ________ mol of H2O.
October 26, 2014

Physics
A cannon ball is fired horizontally with velocity of 15m from the top of a cliff 90m high.after how many seconds will it hit the foot of the cliff(a)time (b)at what distance from the foot of the cliff will it strike.
October 25, 2014

Physical Education help
The body's reaction to information is to send these to the brain. A. Neurons B. Impulses C. Dendrites D. Synapse Is the answer B? Thank you
October 25, 2014

Physical Education help
Thank you :)
October 25, 2014

Physical Education help
When diving into water, it is important to look before diving to avoid (blank) that could damage your nervous system. A. Deep water B. Underwater hazards C. Living creatures D. Water toys Is the answer B? Thanks
October 25, 2014

Physical Education help
Thank you Ms. Sue!
October 25, 2014

Physical Education help
The part of the brain that controls movement and balance is the A. Cerbrum B. Cerebellum C. Brain stem D. Frontal lobe Is the answer B? Thanks
October 25, 2014

Economy, management, corporate governance
BOB'S SUPERMARKET: COMPETING WITH THE BIG BOYS
October 25, 2014

Math
The data shows the total number of employee medical leave days taken for on-the-job accidents in the first six months of the year: 16, 7, 23, 9, 25, 16. Find the standard deviation.
October 25, 2014

Science HELP!
When diving into water, it is important to look before diving to avoid (blank)damage your nervous system. A. Deep water B. Underwater hazards C. living creatures D. Water toys Is the answer B? Thanks
October 25, 2014

Science HELP!
The part of the brain that controls movement and balance is the A. Cerbrum B. Cerebellum C. Brain stem D. Frontal lobe Is the answer B? Thanks
October 25, 2014

math
Thanks so much
October 25, 2014

math
8x-1=55
October 25, 2014

Science HELP!
The body's reaction to information is to send these to the brain. A. Neurons B. Impulses C. Dendrites D. Synapse Is the answer B? Thanks
October 25, 2014

8th grade; English
c b d c, tell me which ones are wrong and give me the answers to them
October 25, 2014

Math
Im still confused on how to solve these equations for the indicated value. 1. a-b=-c, for a 2. y=1/2x-10, for x
October 25, 2014

Fundamental engineering principles
A car traveling at 108 km hr-1 deceleration uniformly from 108 km hr-1 to 72 km hr-1whilst covering 200m.it continues at this reduced for 150m before slowing down uniformly to rest over a distance of 225m. Draw the velocity-time diagram and use it to determine: (A)the total ...
October 25, 2014

Calculus/pre-trig
Write the formula for the discriminant. State the types of roots for a quadratic equation, explaining how the discriminant helps you determine the type.
October 25, 2014

Math
How do you solve each of these equations for the indicated value? I'm so confused on how to do it 1. a-b=-c, for a 2. 4y+6x=12, for y 3. y=1/2x-10, for x
October 25, 2014

Math
a) One mould forms a sculpture that is a composite object comprising a right cylinder with base diameter 15 in. and height 3 in., and a right cone with the same base diameter as the base of the cylinder and a height of 9 in. Determine the volume of the sculpture to the nearest...
October 25, 2014

Precalculus
A cruise ship sets a course N50°E from an island to a port on the mainland, which is c = 170 miles away. After moving through strong currents, the ship is off course at a position P that is N36°E and a = 90 miles from the island, as illustrated in the figure. (a) ...
October 25, 2014

Math
An igloo approximates a hemisphere, with an entrance tunnel that approximates half a right cylinder. The base of the igloo has diameter 4.0 m. The entrance is 0.8 m long; it has an external radius of 0.8 m and an internal radius of 0.7 m. Calculate the surface area of the ...
October 25, 2014

Math
f(x)=3x^2-x-2 If x=2, what is f(x)? What point is on the graph of f? For the first question, I got 8. But, I'm having trouble understanding the second question.
October 25, 2014

Pre-Calc/Trig
Yes, its correct.
October 25, 2014

Math
A solid sphere just fits inside a cube that has an edge length equal to the diameter of the sphere. The edge length of the cube is 5.8 cm. What is the volume of air in the cube to the nearest cubic centimetre?
October 25, 2014

math
1/64
October 25, 2014

math
i really dont know can you please tell me the correct one 4.1/16 5.1/4
October 25, 2014

Precalculus
39 + 21 + 39= 99
October 25, 2014

Precalculus
A reconnaissance airplane P, flying at 11,000 feet above a point R on the surface of the water, spots a submarine S at an angle of depression of β = 21° and a tanker T at an angle of depression of α = 39°, as shown in the figure. In addition, ∠SPT is ...
October 25, 2014

Pre-Calc/Trig
oh wait, nvm
October 25, 2014

Pre-Calc/Trig
oh okay thank you, do i plug them in now or leave it at that?
October 25, 2014

Precalculus
The rectangular box shown in the figure has dimensions 10" × 7" × 3" (a = 10, b = 7, c = 3). Approximate the angle θ formed by a diagonal of the base and a diagonal of the 7" × 3" side. (Round your answer to two decimal places.)
October 25, 2014

Lauren
Let f(x) = 3+4x-x^{3}. Find the open intervals on which f is increasing (decreasing). Then determine the x-coordinates of all relative maxima (minima). 1. f is increasing on the intervals 2. f is decreasing on the intervals
October 25, 2014

math
Let f(x) = 3+4x-x^{3}. Find the open intervals on which f is increasing (decreasing). Then determine the x-coordinates of all relative maxima (minima). 1. f is increasing on the intervals? 2. f is decreasing on the intervals?
October 25, 2014

Precalculus
An airplane flies 180 miles from point A in the direction 135° and then travels in the direction 240° for 90 miles. Approximately how far is the airplane from A? (Round your answer to the nearest whole number.)
October 25, 2014

8th grade language arts
Can you help me with it
October 25, 2014

8th grade language arts
i will tell u what i got and you tell me if it is correct a b c d
October 25, 2014

physics
A 20 g fridge magnet is being held onto the fridge by a 0.9 N force. coefficient of kinetic friction is 0.3 . (please include an FBD when giving the solutions) a. calculate the friction acting on the magnet. b. calculate the weight of the magnet c.the acceleration of the ...
October 25, 2014

statistics
For a normal distribution (symmetrical), a value that is two standard deviations below the mean would be closer to which of the following? Select one: a. 89th percentile b. Third Quartile c. Third percentile d. Median
October 25, 2014

Algebra
Line AB is parallel to line CD for A(4, -5), B(-2, -3), C(x, -2), D(6, y). Find a set of possible values for x and y.
October 25, 2014

Physics
A father pulls his son, whose mass is 27.3 kg and who is sitting on a swing with ropes of length 2.85 m, backward until the ropes make an angle of 36.8° with respect to the vertical. He then releases his son from rest. What is the speed of the son at the bottom of the ...
October 24, 2014

Physics!
A spring with a spring constant of 224.3 N/m is compressed by 0.253 m. Then a steel ball bearing of mass 0.0433 kg is put against the end of the spring, and the spring is released. What is the speed of the ball bearing right after it loses contact with the spring? (The ball ...
October 24, 2014

Physics!
A car of mass 1298.7 kg is moving at a speed of 64.0 mph when it misses a curve in the road and hits a bridge piling. If the car comes to rest in 0.234 s, how much average power (in watts) is expended in this interval?
October 24, 2014

Physics
If you are at the top of a toboggan run that is 44.3 m high, how fast will you be going at the bottom, provided you can ignore friction between the sled and the track?
October 24, 2014

Physics
A classmate throws a 1.1-kg book from a height of 1.3 m above the ground straight up into the air. The book reaches a maximum height of 4.0 m above the ground and begins to fall back. Assume that 1.3 m above the ground is the reference level for zero gravitational potential ...
October 24, 2014

Physics
A classmate throws a 1.1-kg book from a height of 1.3 m above the ground straight up into the air. The book reaches a maximum height of 4.0 m above the ground and begins to fall back. Assume that 1.3 m above the ground is the reference level for zero gravitational potential ...
October 24, 2014

physics
Calculate the mass of H2O produced by metabolism of 2.6kg of fat, assuming the fat consists entirely of tristearin (C57H110O6), a typical animal fat, and assuming that during metabolism, tristearin reacts with O2 to form only CO2 and H2O.
October 24, 2014

SS
How many airlines are owned by USA-based companies?
October 24, 2014

Pre-Calc/Trig...
Help me please Standard form: y=x^2-2x-3 Vertex form: ??? Intercept form: ???
October 24, 2014

math
I have 21 children in my class total. 6 of them are boys and 15 of them are girls. What is the percentage of males in the class
October 24, 2014

algebra
Ace car rental rents a car for $45 and .25 cents per mile. Star rental car rents a car for $35 and .30 cents per mile. How many miles would a driver need to drive before the cost of renting a car at these two places were the same?
October 24, 2014

Civics PLEASE HELP ME!
Thank you so much!! This will help me a lot!
October 24, 2014

Civics PLEASE HELP ME!
it is a breakup letter between the colonists and Great Britain. Please help?!
October 24, 2014

Civics PLEASE HELP ME!
Can anyone help me with a breakup letter for civics?? It is quite difficult for me. It is about the Declaration of Independence.
October 24, 2014

math
MRS SUE ANSWER MY QUESTION
October 24, 2014

math
MRS SUE ANSWER MY QUESTION
October 24, 2014

math
The answer is Idk and idc
October 24, 2014

science
thank you very much Ms.Sue
October 24, 2014

science
a horticultural wants a plant that produces flowers with a certain size color and fragrance but it now aware of any one plant having all of these traits. the quickest way she could achieve her goal would be to apply the process of_____________
October 24, 2014

Math
Interest is a concept familiar to most people: every credit card in existence has a term called annual percentage rate (APR), which is an interest rate. Suppose you charged $1,000 to a credit card that has a minimum payment each month equal to the interest owed. Can you figure...
October 24, 2014

Physics
As shown in the figure below, a skateboarder starts at point A on the ramp and rises to point B, a maximum height of h = 2.89 m above the top of the ramp. If the amount of work done against friction is insignificant, determine his initial speed at point A.
October 24, 2014

Latin I
Oh I found it.
October 24, 2014

Latin I
So would it be: The farmer and the woman showed the poet's farmhouse to the queen.
October 24, 2014

people
Which of the following conclusions is supported by the results of these studies
October 24, 2014

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