Wednesday
September 17, 2014

Posts by John


Total # Posts: 6,239

Physics
497.67
March 14, 2014

Which of the following is a compound?
c, CO
March 13, 2014

Language book
Hi i need help with this book called as for me and my house could you help me with this question When mrs. Bentley decides to plant a garden, the main problem is that according to propriety the mistress of the parsonage should not ___________ a.sow b.weed c.water d.dig Thanks ...
March 13, 2014

science (check answer?)
Well i also learned this so i got the same question from my school and the answer was they are all metals. Its 100% right
March 13, 2014

Biology
Are my answers correct? 1. What term describes the relationship of the ankle to the hip? Medial Proximal Distal this one Superior Anterior 2. What term describes the relationship of the nose to the mouth? Superior- this one Deep Anterior Inferior Superficial
March 12, 2014

Calculus
17
March 11, 2014

physics
An outfielder throws a 1.65 kg baseball at a speed of 59 m/s and an initial angle of 14.2◦. What is the kinetic energy of the ball at the highest point of its motion?
March 9, 2014

Finance
Cindy has an income of 56,000 in year 0. Calculate her income in year 1 if she wants to consume 40,000 in year 0 and 27,000 in year 1. Assume that the interest rate is 1.5 % per year.
March 6, 2014

research
What are the pros and cons of disguised observation?
March 5, 2014

chemistry 1
DDT concentrations in ground water. How do you set it up with a sample size of 250.0mL and the mass of DDT at 0.030 and then convert to millimoles. Just can't remember how to set it up.
March 4, 2014

Math
Thank
March 4, 2014

Math
How to set up an equation for this problem? Thank you.
March 4, 2014

Math
Mr. Bailey mowed his yard in 90 minutes. His son Roy mows the yard in 75 minutes. How long will it take them if they work together (using 2 lawn mowers)?
March 4, 2014

algebra
Brandon hit a baseball upward with an initial speed of 120 feet per second. How much later did Ollie catch the ball? Use the formula h = -16t squared + vt.
March 4, 2014

Physics
A ball is dropped from a height of 1.45m and rebounds to a height of 1.21m. Approximately how many rebounds will the ball make before losing 92% of its energy?
March 3, 2014

math
a telephone pole is 64 feet long and 5/16 of the pole must be underground a) what fraction of the pole is above ground
March 2, 2014

Precalculus
A lattice point is a point with integer coordinates. How many lattice points (x,y) with -100 less than or equal to x less than or equal to 100 and -100 less than or equal to y less than or equal to 100 are on the graph of the parametric equations x=30-40 cos t and y=-50 + 30 ...
March 2, 2014

Precalculus
That's wrong :( It's not 2pi/3 or pi
March 2, 2014

Precalculus
Let G be the graph of the parametric equations x=cos(4t)and y=sin(6t). What is the length of the smallest interval I such that the graph of these equations for all t in I produces the entire graph G?
March 2, 2014

Precalculus
-9 is incorrect, sorry. The answer is also not 6 or -6
March 2, 2014

Precalculus
Find the sum of all possible values of the constant k such that the graph of the parametric equations x=2+4cos(s) and y=k-4sin(s) intersects the graph of the parametric equations x=1+cos(t) and y=-3+sin(t) at only one point.
March 2, 2014

Precalculus
Find the sum of all possible values of the constant k such that the graph of the parametric equations x=2+4cos(s) and y=k-4sin(s) intersects the graph of the parametric equations x=1+cos(t) and y=-3+sin(t) at only one point.
February 28, 2014

Precalculus
Let G be the graph of the parametric equations x=cos(4t)and y=sin(6t). What is the length of the smallest interval I such that the graph of these equations for all t in I produces the entire graph G?
February 28, 2014

Precalculus
A lattice point is a point with integer coordinates. How many lattice points (x,y) with -100 less than or equal to x less than or equal to 100 and -100 less than or equal to y less than or equal to 100 are on the graph of the parametric equations x=30-40 cos t y=-50 + 30 cos t ?
February 28, 2014

Math
Another variety of R&Ns has a different set of magical (yet mathematical) properties. Remove exactly 4 candies and 1 additional candy appears in the bag. According to the package, a bag contains 50 candies. What is the maximum number of canies that this variety of R&Ns will ...
February 27, 2014

Math
R&N is a new candy with magical (yet mathematical) properties. Not all candies are the same size. When removing the largest R&N from a new bag, the bag becomes 1/2 full; removing the second largest makes the bg 1/3 full; removing the third largest makes it 1/4 full, and so on...
February 27, 2014

Math
Another variety of R&Ns has a different set of magical (yet mathematical) properties. Remove exactly 4 candies and 1 additional candy appears in the bag. According to the package, a bag contains 50 candies. What is the maximum number of canies that this variety of R&Ns will ...
February 26, 2014

Math
R&N is a new candy with magical (yet mathematical) properties. Not all candies are the same size. When removing the largest R&N from a new bag, the bag becomes 1/2 full; removing the second largest makes the bg 1/3 full; removing the third largest makes it 1/4 full, and so on...
February 26, 2014

Math
Another variety of R&Ns has a different set of magical (yet mathematical) properties. Remove exactly 4 candies and 1 additional candy appears in the bag. According to the package, a bag contains 50 candies. What is the maximum number of canies that this variety of R&Ns will ...
February 26, 2014

Math
R&N is a new candy with magical (yet mathematical) properties. Not all candies are the same size. When removing the largest R&N from a new bag, the bag becomes 1/2 full; removing the second largest makes the bg 1/3 full; removing the third largest makes it 1/4 full, and so on...
February 26, 2014

Chemistry
When 10.00g of phosphorus is burned in O2(g) to form P4O10(s), enough heat is generated to raise the temperature of 2990g of water from 18.0 ∘C to 38.0 ∘C. Calculate the heat of formation of P4O10(s) under these conditions. -------------------------------------- ...
February 25, 2014

Math
Another variety of R&Ns has a different set of magical (yet mathematical) properties. Remove exactly 4 candies and 1 additional candy appears in the bag. According to the package, a bag contains 50 candies. What is the maximum number of canies that this variety of R&Ns will ...
February 25, 2014

Math
R&N is a new candy with magical (yet mathematical) properties. Not all candies are the same size. When removing the largest R&N from a new bag, the bag becomes 1/2 full; removing the second largest makes the bg 1/3 full; removing the third largest makes it 1/4 full, and so on...
February 25, 2014

math
mollly uses 192 beads to make a necklace and a bracelet. it takes 5 times as many beads to make a necklace than it does to make a bracelet. How many beads are used to make the necklace?
February 25, 2014

english
1.Virtual reality systems can be used to train pilots, doctors, and engineers. These systems are seen most often in video games. 2. a head-mounted display is made of a headset with a screen for each eye. the display connects to a computer. 3. a tracking device senses the eye ...
February 25, 2014

Math
John is designing a redwood deck. each board is 5 1/2 inches wide, and each will be placed parallel to one another. Should he use 3/16 inch, 1/4 inch, or 3/8 inch spacing between boards if he wants the deck to be as close as possible to, but not greater than, 18 fet wide? How ...
February 25, 2014

Math
A carousel at Playland, contains 38 horses. each carousel ride takes 4 minutes, riders need 3 minutes to exit and newcomber require 3 minutes to pick a horse and hop on. A carousel ride costs $0.75. The carousel makes $88,239.00 a year. How many horses are occupied per ride, ...
February 25, 2014

Math
What is the maximum number of intersections that can be formed by n lines?
February 25, 2014

math
Another variety of R&Ns has a different set of magical (yet mathematical) properties. Remove exactly 4 candies and 1 additional candy appears in the bag. According to the package, a bag contains 50 candies. What is the maximum number of canies that this variety of R&Ns will ...
February 25, 2014

Math
R&N is a new candy with magical (yet mathematical) properties. Not all candies are the same size. When removing the largest R&N from a new bag, the bag becomes 1/2 full; removing the second largest makes the bg 1/3 full; removing the third largest makes it 1/4 full, and so on...
February 25, 2014

Precalculus
In most geometry courses, we learn that there's no such thing as "SSA Congruence". That is, if we have triangles ABC and DEF such that AB = DE, BC = EF, and angle A = angle D, then we cannot deduce that ABC and DEF are congruent. However, there are a few special ...
February 24, 2014

calculus
h(t)=tan theta (5pie/3,3pie) graph the function on the given interval
February 24, 2014

6th grade social studies
The second answer is:India.
February 24, 2014

Chemistry
A gas at 54◦C occupies 4.54 L. At what tem- perature will the volume be 3.04 L, assuming the same pressure?
February 23, 2014

chemistry
A sample of helium gas has a volume of 328 mL at 0.69 atm. What pressure is needed to reduce the volume at constant temperature to 32 mL?
February 23, 2014

mat/116
WHATS THE EQUATION FOR THAT PROBLEM
February 23, 2014

Physics
You and some friends go bungee jumping, but you are afraid of oscillations which go too fast. Which one of these options would provide the slower oscillations? a) Tying two bungee cords to your feet such that each bungee cord is attached to your feet and the object which you ...
February 22, 2014

Pre-Calc
One side of the barn counts as an enclosure.
February 19, 2014

Pre-Calc
A farmer is making a pig pen next to the barn. He has enough materials to build 50 feet of fencing. a)what is the largest area he can fence in? b)what are the dimensions of the pen with the largest area?
February 19, 2014

Math
Use the Rational Zeros Theorem to write a list of all possible rational zeros of the function. -2x^4+4x^3+3x^2+18
February 18, 2014

math
1-tan^2 theta/1+tan^2 theta + 2sin^2 theta need to simply to sin and cos
February 17, 2014

Problem solving
30
February 17, 2014

Chemistry
So (650)(25)/248=353(x)/298 65.5241=.8441/(x) 55.3=x got it right thanks Dr.Bob
February 15, 2014

Chemistry
If a sample of gas occupies 25.0 mL at -25°C and 650 mmHg, what is the volume at 25°C and 353 mmHg? (Could you please show me step by step?)
February 15, 2014

Physics
sin^-1(y/x)
February 15, 2014

Physics
Calculate the gravitational force between the Sun and Saturn. The mass of the Sun is 1.99×1030 kg. The mass of Saturn is 5680×1023 kg. The distance between them is 143×1010 m. In Newtons
February 13, 2014

Math
I have $35,000 in holding since 1997 earning an interest rate of 3%. How much is this worth today in $
February 13, 2014

strayer university
The Lo Company earned $ 2.60 per share and paid a dividend of $ 1.30 per share in the year just ended. Earnings and dividends per share are expected to grow at a rate of 5 percent per year in the future. Determine the value of the stock: A. if the required rate of return is 12...
February 13, 2014

chemistry
2 nacl (aq) + h2so4 ==> na2so4 (aq) + 2 hci (g)
February 13, 2014

physics
if the capacitance meter applies a voltage of 3.0 V across the plates and reads a capacitance of 30 pF, what is the charge on the plates?
February 13, 2014

physics
A projectile is fired into the air from the top of a cliff of height h = 208 m above a valley. Its initial velocity is v0 = 55.2 m/s at an angle θ = 54° above the horizontal. Where does the projectile land? (Ignore any effects due to air resistance.)
February 12, 2014

physics
The surface density of a thin rectangle varies as: σ(x,y)= 14.0 kg/m2 + 9.00 kg/m4(x2+y2) The rectangle has a length L = 0.500 m and a width W = 1.500 m. Calculate Iz, the moment of inertia about the z-axis.
February 11, 2014

physics
A block of mass 0.74 kg is suspended by a string which is wrapped so that it is at a radius of 0.060 m from the center of a pulley. The moment of inertia of the pulley is 0.0061 kg·m2. There is friction as the pulley turns. The block starts from rest, and its speed ...
February 11, 2014

Physics
Thank you very much.
February 11, 2014

Trigonometry
Suppose you were at the beach and notice that at 1:00 pm the tide is in, that is, the depth of water is at its deepest. At that time you find that the depth of the water at the end of the pier is 1.9 meters. At 7:00 that evening when the tide is out, the depth of the water is ...
February 11, 2014

math
The answer is 108.
February 11, 2014

algebra
Find an equation in slope-intercept form of the line passing through (0, 1) which is parallel to the line y = 6x – 23
February 10, 2014

Math
12/15-7-15+15=1 what is the missing number
February 10, 2014

Precalculus
Oops I meant sum and difference
February 10, 2014

Precalculus
Wow, I tried that but I messed up signs! Thanks!
February 10, 2014

Precalculus
Show that cot((x+y)/2)=-(sin(x)-sin(y))/(cos(x)-cos(y)) for all values of x and y for which both sides are defined.
February 10, 2014

Liberty University
A data set 106 body temperature of healthy adult humans for which, for x =98.7F and s = 0.72F
February 10, 2014

economics
After 17 vehicular accidents two years ago in a given intersection, the mayor of Boulder proposed to reduce the number of crashes by making improvements at the intersection. Assuming the appropriate CRF is 0.53, what will be the reduction in number of crashes at that ...
February 10, 2014

Precalc
A vehicle has an engine that is connected directly to a gear box. In the highest gear, a 2 inch radius gear is turning a 14 inch diameter gear. This gear is connected to the drive shaft. The drive shaft attaches to a wheel and a tire that measures 2 and 1/3 feet in diameter. ...
February 10, 2014

Chemistry Help
1.485
February 10, 2014

Mathe
The answer is 64
February 9, 2014

Mathe
The number has two digits. Both of the digits are even.the digit in the tens place is greater that the digit in the unit (or ones) place.the units (or ones digit) is not in the three times table. The tens digit is not double the ones digit. The sum of the two digits is a ...
February 9, 2014

math
The only way to get to Ship Island is to take the ferry which is free for babies (2 and under), $17 for children (3-10 years old), $25 for seniors (62 and older), and $27 for everyone else. Debbie paid $115 for 6 people in her family to go to the island for the day. Is it ...
February 9, 2014

Math
OHHH it has to be in terms of x! Thanks!
February 8, 2014

Math
Let f(x) be a polynomial such that f(cos theta) = cos(4 theta) for all theta. Find f(x). (This is essentially the same as finding cos(4 theta) in terms of cos theta; we structure the problem this way so that you can answer as a polynomial. Be sure to write your polynomial with...
February 8, 2014

Physics
The only force acting on a 4.7 kg body as it moves along the positive x axis has an x component Fx = -6x N, where x is in meters. The velocity of the body at x = 2.4 m is 11 m/s. (a) What is the velocity of the body at x = 4.9 m? (b) At what positive value of x will the body ...
February 8, 2014

Wave
What feature is NOT defined for a wave pulse? a)period b)wave speed c)the position of a particle at a certain time d)a defined source
February 8, 2014

Math Sums and Differences
a 8 b -7 c -7 d 11 e 3 f 35 a -7, -10, -13 b 5, 9, 13
February 8, 2014

physics
Q. A 200 kg load is suspended by a cable from a crane . Two ropes are attached to the load , acting at 90 deg to each other. One rope exerts a pull of 220 N , at 10 deg below horizontal, the other rope exerts a force of 360 N at 15 deg below horizontal. Calculate 1)tension in ...
February 7, 2014

Math
Harry Styles wants to make trail mix made up of almonds, walnuts, and raisins. He wants to mix one part almonds, two parts walnuts and, three parts raisins. Almonds cost $12 per pound, walnuts cost $9 per pound and, raisins cost $5 per pound. He has $15 to spend on the trail ...
February 6, 2014

Physics
If you can throw a stone straight up to a height of 18m, how far could you throw it horizontally over level ground? Assume the same throwing speed and optimum launch angle.
February 5, 2014

physics
Find the length of a simple pendulum that has a period of 5.00s . Assume g = 9.81 m/s2. Express your answer to three significant figures and include the appropriate units.
February 5, 2014

algebra
The questions is like this: sqr(2) + sqr(1), and the asnwer is 1 + sqr(2), or in decimal form: 2.4142
February 5, 2014

Language Arts ~CHECK MY WORK PLEASE~
Ok, now I can answer your last questions. The last one is right! good job
February 5, 2014

Trigonometry
Thank you very much; but these are the only answers! I don't know why, but I'll try to check with my teacher. Again, thanks for the help and showing your work, you're awesome!
February 5, 2014

Trigonometry
If a ship leaves port at 9:00 a.m. and sails due north for 3 hours at 12 knots, then turns N 30° E for another hour, how far from port is the ship? A. 45 nm B. 47 nm C. 51 nm D. 53 nm
February 5, 2014

Trigonometry
Wel, I'm not sure, I have two other questions with practically the same things, please take a look! If a ship leaves port at 9:00 a.m. and sails due east for 3 hours at 10 knots, then turns N 60° E for another hour, how far from port is the ship? A. 35 nm B. 39 nm C. ...
February 5, 2014

Trigonometry
If a ship leaves port at 9:00 a.m. and sails due south for 3 hours at 14 knots, then turns N 60° E for another 2 hours, how far from port is the ship? A. 14 nm B. 17.75 nm C. 21.5 nm D. 22.6 nm PLEASE HELP!
February 5, 2014

Writing Evaluation (Writeacher!)
This is really good. Just a few points- One, African american woman DO NOT earn less than white women "to this day", that is prejudiced as well as bias, and is illegal in the U.S. and many other countries. You might want to take that part off. Otherwise, good job!
February 5, 2014

physics
An object (with charge -4.2 µC and mass 0.024 kg) hovers at rest above the ground, its weight being held up by a uniform electric field.(a) Find the size and direction of this electric field.(b) If the electric charge on the object is quadrupled while its mass remains ...
February 4, 2014

physics
An object (with charge -4.2 µC and mass 0.024 kg) hovers at rest above the ground, its weight being held up by a uniform electric field.(a) Find the size and direction of this electric field.(b) If the electric charge on the object is quadrupled while its mass remains ...
February 4, 2014

math
laura favorite clothes are five sweater, four skirts, three jackets, two pairs of shoes and one belt. how many ways can laura wear her favorite clothes without repeating the exact outfit
February 4, 2014

math
a drinking glass 5 inches tall has a 2.5 inch diameter base. its sides slope upward at a 4 degree angle. what is the diameter of the top of the glass?
February 3, 2014

Chem.
How many milliliters of water has been dispensed if the initial buret reading was 0.38 ml and the final is 24.70 ml?
February 3, 2014

Help!!!
Thanks Emily i got a 100 % too
February 3, 2014

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