Friday

November 27, 2015
Total # Posts: 7,041

**Statistics**

Sorry to ask another question but I keep struggling with this class. If all else remains the same, which of these will make a confidence interval for a proportion narrower? I. Increase the confidence level. II. Increase the sample size. III. Increase the margin of error. A. I ...
*March 29, 2014*

**Statistics**

Which of these statements is always true for a researcher who is using standard statistical methods in a test of significance? A. A researcher who rejects a true null hypothesis has committed a Type II error. B. A researcher who rejects the null hypothesis has computed a test ...
*March 29, 2014*

**math**

Enrique charges $5 for every 1/5 hour he spends walking dogs. In the morning he walks Buttons for 2/5 hour, Bruno for 1/5 hour, and Pepper for 3/5 hour, Monday through Friday. On Saturdays he takes Mimi, Diva, and Coco to the dog park for 4/5 of an hour. On Wednesday this week...
*March 28, 2014*

**math**

thank you just wanted to clear it .thanks to clear my doubth
*March 26, 2014*

**math**

36/1.5 = ? how to divide this
*March 26, 2014*

**math**

There are 50 big cats in the zoo. 2/5 of them are tigers. 1/5 of them are leopards. The rest are lions. How many lions are there in the zoo?
*March 26, 2014*

**math**

kevin bought a 3-foot sandwich for his .Hew figured out that each guest can have 1 1/2 inches of the sandwich . HOW MANY guest does kevin have
*March 24, 2014*

**College Physics**

What's the answer?
*March 24, 2014*

**physics**

Earth is approximately a sphere of radius 6.37 × 106 m. What are (a) its circumference, (b) its surface area, and (c) its volume? please help
*March 23, 2014*

**statistics**

Consider a binomial experiment with 20 trials and a probability of 0.45 on a single trial.Use the normal distribution to find the probability of exactly 10 successes.
*March 21, 2014*

**physics**

What is the momentum of the 200 g cart BEFORE the collision (LEAVE OUT units of kgm/s)? please help.
*March 20, 2014*

**physics**

if the cart in the last question collides INELASTICALLY with a stationary cart of mass 150 g, what is the kinetic energy of the carts after the collision (LEAVE OUT units of J)?
*March 20, 2014*

**Investment interest**

Scenario: A client comes to you for investment advice on his $500,000 winnings from the lottery. He has been offered the following options by three different financial institutions and requests assistance to help understand which option would be the best for his investment. ...
*March 15, 2014*

**Physics**

497.67
*March 14, 2014*

**please check(Social studies)**

Karen nice job
*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*

**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*

**Finance**

i don't know
*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*