Tuesday
July 29, 2014

Posts by anonymous


Total # Posts: 70,620

statistics
simple randon sampling uses a sample size n

physics
A car traveling at2.24m/s skids and stops in 2.55s determine the skidding distance of car

creating enviornment
which of the following behaviors might be resolved by changing the environment? a. two children fighting over a toy fire engine. b. children wandering rather than participating in activities during center time. c. children climbing on furniture d. all of the above

creating environment for learning
thank you

creating environment for learning
b

creating environment for learning
tenille is sitting with a group of preschool children at lunch time. which of the following is an example of an open-ending question? a. do you like apples or oranges better b. what are the ways that apples and oranges are alike? c. what color are the beets? d. what do you say...

creating environment for learning
its d

creating environment for learning
which of the following behaviors might be resolved by changing the environment? a. two children fighting over a toy fire engine. b. children wandering rather than participating in activities during center time. c. children climbing on furniture d. all of the above

English
Is the usage of me and I correct in the following sentences? If not, what would be the correct way to say these sentences? 1. I wish I had known about these picture board systems then, as it may have enhanced the communication between the children and me. 2. It was frustrating...

Wood working
If I have a board 31 1/4 " long and want 13 stripes on it how wide will each stripe be

statistics
Select which of the following are examples of parameters from these examples. Question options: The probability that a ticket with be a winner is .2 (or a 20% chance) The proportion of winning tickets in the sample of 100 99% of samples will have between 37% and 43% of voters ...

ph208
What would be the most plausible message that Groundhog Day is communicating about the relation between ethical standards and individual happiness? (Points : 1)

pre-cal
if the helicopter is moving forward at 30 mph and drops 400 feet in the elevation while the vehicle is moving 48 mph, how does the angle of depression change after 10 minutes?

Physics
A large store escalator that is designed to transfer customers to one floor to another, a vertical distance of 8.0m. It takes each person 20 seconds to ride from bottom to top of the escalator. Explain how you would determine the power of the escalator motor.

Physics
A person with a mass of 55kg climbs a tower with a height of 11m in 25 minutes. What power is produced?

Calculus help
assume that the initial deposit is $20000 and the nominal annual interest rate is 5.7%. Determine the amount in the account in 10 years if the interest is compounded as follows (round your answers to the nearest dollar): (a) Annually: P=20000(1.057)^10 (b) Monthly: (c) Weekly ...

physics
An object with a mass of 50.0 g displaces 230.0 ml of water when it is completely immersed. What is the buoyant force on the mass? (Use g = 9.8 N/kg as necessary.)

NEED HELP WITH CALC
Suppose strontium-90 decays at a rate of 2 percent per year. (a) Write the fraction P of strontium remaining, as function of t, measured in years. (Assume that at time t=0 there is 100 % remaining.) Answer: P(t) = (b) Estimate the half-life of strontium. Answer: Hint: Use your...

calculus
a.) choice 1

calculus
Choice 1: Payments of $ 2600 now, $ 3200 a year from now, and $ 3880 two years from now. Choice 2: Three yearly payments of $ 3200 starting now. Modification: Interest is compounded continuously instead of annually. (a) If the interest rate on savings were 4.86 %, which would ...

calculus
Suppose strontium-90 decays at a rate of 2 percent per year. (a) Write the fraction P of strontium remaining, as function of t, measured in years. (Assume that at time t=0 there is 100 % remaining.) Answer: P(t) = (b) Estimate the half-life of strontium. Answer: Hint: Use your...

Math
a) In order to express the function y = 1311 x − 4, as a composition of two functions the outer of which is an exponential function, we would let u be equal to the inner function, u = , and then write y as a function of u, as follows: y = . (b) In order to express the fu...

Math
Redo problem 13 from section 1.8 of your textbook (page 62), but use the functions in the questions below rather than the functions in your textbook: (a) In order to express the function y = 1311 x − 4, as a composition of two functions the outer of which is an exponenti...

Math
Choice 1: Payments of $ 2600 now, $ 3200 a year from now, and $ 3880 two years from now. Choice 2: Three yearly payments of $ 3200 starting now. Modification: Interest is compounded continuously instead of annually. (a) If the interest rate on savings were 4.86 %, which would ...

Math
A culture of bacteria grows exponentially. It doubles in size every 81 hours. How long will it take to triple from its original size? Answer: hours.

Math
Suppose strontium-90 decays at a rate of 2 percent per year. (a) Write the fraction P of strontium remaining, as function of t, measured in years. (Assume that at time t=0 there is 100 % remaining.) Answer: P(t) = (b) Estimate the half-life of strontium. Answer: Hint: Use your...

English
the only car for him is one of those new GTO's.

calculus
Pretend the world's population in 1989 was 5 billion and that the projection for 2017 is 7.5 billion. What annual rate of growth is assumed in this prediction?

calculus
Pretend the world's population in 1989 was 5 billion and that the projection for 2017 is 7.5 billion. What annual rate of growth is assumed in this prediction?

physics
140

math
find if 6 box have.they each having60,30,20 and 15 what next two

math
Share 7m in the ratio 32:3

math
The sales goal for your store this week $22,682. The sales goal for your store this week last year was $20,128. Your store has averaged 1775 transactions perweek or the last four weeks. What is the percent change in your sales goal from this week last year to this week this year?

Algebra
Find the GCF 12x^3 and 20x^2. 4x^2????

science
Thank you ;)

science
This what I am stuck on, what specific policies might the United States enact to reduce its impact on global climate change? The rest I know how to complete.

science
As the United States is one of the largest contributors to atmospheric carbon emissions, what specific policies might the United States enact to reduce its impact on global climate change? Using at least two scholarly or reputable resources and your textbook, discuss the econo...

psychology
humans rely heavily on the sense of because evolution designed us to be more active during the day time than at night

math
The cost of a regular price ticket to Saint Louis Cardinal baseball game as $60. During the world series, the price increased by 2/5. What did the fans pay?

english 2
Either you can eat or talk, but you can't do both at the same time.

english 2
People who attract a lot of friends are neither negative nor needy.

math psp
A number is300 when rounded off to the nearest hundred.what is the greatest possible value of the number

math
swimming pool 50 m x 20 m. how many 10 cmx 10 cm tiles needed for pool?

math
How much is 7.25 kg at $20 per kilogram?

Algebra
x^3 -5x-6=0 can you please tell me how to solve this algebraically? I tried using grouping method x(x^2-5)-6=0, I'm not sure what to do next.

statistics
A sample of 40 CDs from a student's collection showed a mean length of 52.74 minutes with a standard deviation of 13.21 minutes. Construct a 95% confidence interval for the population standard deviation. (Round your answers to 4 decimal places.)

physics
A 90 kg box is pushed by a horizontal force F at constant speed up a ramp inclined at 28°, as shown. Determine the magnitude of the applied force. when the ramp is frictionless. when the coefficient of kinetic friction is 0.18.

ALGEBRA
e

lwtech
In order to build a bridge across a river, a surveyor is hired to find the distance across the river. The surveyor places a stake on either side of the river. As shown in the diagram below (the diagram is not drawn to scale). He measures the bearing to the first stake as 16 de...

algebra
Thirteen times a number m is greater than or equal to three hundred. Is this statement True or False

physical
Two forces FA and FB are applied to an object whose mass is 9.39 kg. The larger force is FA. When both forces point due east, the object's acceleration has a magnitude of 1.40 m/s2. However, when FA points due east and FB points due west, the acceleration is 0.950 m/s2, du...

math
coppertone sport ultra sweatproof-spf 15 dry lotion contains 1.2 mg of otylmethoxycinnamate per fluid oz. how many micrograms of this chemical would be in 1/2 pint of the sunblock lotion?

statistics
Facebook reports that the average number of Facebook friends worldwide is 150 with a standard deviation of 90. If you were to take a sample of 25 students, what is the probability that the mean number Facebook friends in the sample will be 165 friends or more?

Math
8x8x8x8 base 2

Math
Give the standard "f(x)" definition of the function. Subtract one and then take the absolute value My answer : f(x)= |x|-1 is it correct?

chemistry
a student weighs out 37.0 grams worth of an unknown liquid into her graduated cylinder while preparing an experiment. Her formerly empty 100 mL graduated cylinder now contains exactly 25mL of liquid. She then adds 3.25 ml of H2O and according to her instructions the graduated ...

chemistry
Microwave ovens emit radiation with an energy of 2.05x10^-24 J for every photon released. What is the wavelength in nm for tis energy?

physics
A baseball pitcher throws a baseball horizontally at a linear speed of 50.6 m/s. Before being caught, the baseball travels a horizontal distance of 24.9 m and rotates through an angle of 54.5 rad. The baseball has a radius of 3.43 cm and is rotating about an axis as it travels...

Music
The time signature is 4/4 and so how can I figure out the value of an eighth note? Sixteenth note?

Math
i)When an identity is stated in terms of "x" what does say about the number x? ii)(generally) what are identities about? please help !!!!!

calculus
the weight of a person on or above the surface of the earth varies inversely as the square of the distance the person is from the center of the earth. if a person weighs 180 pounds on the surface of the earth and the radius of the earth is 3900 miles, what will the person weig...

physics
If you have 2 objects of diferrent densities and you want them to have equal masses,what ratio of the volume to each other The answer I think the object with the greater density must have low volume compared to the other with small density

Leadership
How do you handle yourself when someone gets mad at you for punishing them when they clearly deserve it? (No multiple choices)

math
Six years after buying 100 shares of xyz stock for $40 per share you sell the stock for 6400. 6400-4000/4000=0.6 6400/4000=1.6 yx exponent in parentheses (1/4)=1.12468265 -1=0.12468265 =12.5

HELP!!!
Given the area of ABC=7.52m^2. Find a to the nearest hundredth meter when m<B=40 degrees and c=6m

Algebra 2
Every day, there are 5 times more likes on an internet video of a dog which is modeled by the function c(n) = (5)n − 1, where n is the number of days since the video posted. On the first day, there were 103 likes. What is the function that shows the number of likes each ...

math
Brett has been studying a type of bacteria that doubles every month. Originally, there were 5 bacterial cells. He wants to know how many there will be after 42 months. Which equation should he use? a42 = 5(2)42 − 1 a42 = 5(2)(42) a42 = 5(2)42 a42 = 5(2)(42 − 1)

Trig laws
Given the area ABC=7.52m©÷. Find a, when m¡ÐB=40¡Æ and c=6m.

Trig laws help
mÚA=15.52, c=18ft, b=16ft, then a=? ft

Physics
A plate carries a charge of -2.0 µC, while a rod carries a charge of +3.0 µC. How many electrons must be transferred from the plate to the rod, so that both objects have the same charge?

Physics
A plate carries a charge of -2.0 µC, while a rod carries a charge of +3.0 µC. How many electrons must be transferred from the plate to the rod, so that both objects have the same charge?

math
Find the simple interest on N280.00 for 2 and half years at 3% per annum.

Trigonometry help
A boat drops an anchor to the bottom of a lake. The anchor rope makes a 15 degree angle with the boat. The anchor rope is 24 feet long. To the nearest foot how deep is the lake? Would I use the cos function giving me 23 or the sin function giving me 6 but how would my set up be?

Algebra/Steve
thank you. and it keeps my mind on something else instead of crying Thank you for the prayers

chemistry
Can anyone explain to me the rate of disappearance and appearance? I had two problems and ive figured them out but i dont understand why they were solved this way. If the rate of appearance of Cr(SO4)3 is 1.24mol/min then what is the disappearance of C2H6O? 2 K2Cr207 + 8 H2SO4...

programming oop
I need a help regarding this. Compute and display the sum o 1st and 2nd number, Difference of sum and 3rd number, product of difference and 4th number, Quotient of product and 5th number using Eclipse Helios. My subject is OOP

programming
I need a help regarding this. Compute and display the sum o 1st and 2nd number, Difference of sum and 3rd number, product of difference and 4th number, Quotient of product and 5th number using Eclipse Helios. My subject is OOP

math
Create an equation you could use to calculate the cost one person spends on food for a year (assume no tax on the food), using this site. Your equation must work for any age range, and any gender

geometry
Find the image of P(–2, –1) after two reflections; first , and then . A. (–2, –1) B. (–1, –6) C. (4, –9) D. (1, –5)

business
You have just received good news. You have inherited $1,000,000 from a distant relative. You have to meet two goals with the money: one, start a small business and not spend more than $250,000 in total in the next 2 years, and two, save for your retirement in 30-35 years. How ...

chemistry
thank you

chemistry
What is the magnitude change in pH when 1.8g of NaOH is added 1L of a solution that is 0.100M in NH3 and 0.100 in NH4Cl? Kb for NH3 1.8 * 10^-5

algebra
To repair his kitchen subfloor, John cut a rectangular piece of plywood such that width and length were two consecutive odd integers. If the product of the length and width is 99, what were the dimensions of the piece of plywood?

math
I want to make a recipe which calls for 4/7 cup of granola. I only want to make 3/8 of the recipe. How much granola do I need to use.

health
Can someone help explain these directions?? For the energy-yielding nutrients, please convert the amount (grams) consumed to calories.  This can be done by multiplying the amount of that nutrient consumed by the respective number of calories it provides (protein and ...

health
I am having difficulty with calculating the energy-yielding nutrients to gram and calories in order to figure out percent of energy contributed by that nutrient.

stats
A random sample of 50 households in community A has a mean household income of X =Rs. 44,600 with a standard deviation s =Rs. 2,200. A random sample of 50 households in community B has a mean of X = Rs. 43,800 with a standard deviation of Rs. 2,800. Estimate the di&#...

Math
A radioactive material takes 60 days to cut its radiation in half. If it starts at 100%, when will it be at 5%?

chemistry
what would the written chemical reaction be to this problem? How many grams of hydrochloric acid should we use so we have exactly enough to react with 40g of sodium hydroxide? You'll need to write a chemical reaction, balance it, and then perform your calculation.

math
Jefferson Bank made a loan at 6% interest for 146 days. If the amount of interest was $36.50, use the ordinary interest method to find the amount of principal borrowed. Round to the nearest whole dollar amount

physics
Find the work done by 2.32 moles of an ideal gas if its volume doubles at a constant temperature of 22.6°C.

Chemistry
A solution of KCI is saturated at 50 degrees C. How many grams of solute are dissolved in 100g of water?

chemistry
A solution contains 72.0 g of HCl and 468 g of (C6H6). What is the mole fraction of benzene?

Physics
You have a grindstone with a mass of 90.0 kg, 0.340-m radius, and is turning at 90.0 rpm. You press a steel ax against it, bringing it to a stop in 36.0 s. (a) What is the change in kinetic energy of the grindstone? (b) If the tangential force due to the friction between the a...

english
1. Give two examples of each of the following elements of fiction and nonfiction from the texts you’ve read in Units 1, 2, and 3. Characters: Plot: Conflict: Setting: Point of View: Theme: Style: Tone: Perspective: Bias: Purpose:

physics
Physics? Looks like elem calculus to me.

math
From a survey of 100 college students, a marketing research company found that 55 students owned iPods, 25 owned cars, and 15 owned both cars and iPods. (a) How many students owned either a car or an iPod (but not both)?

geometry
The angle of depression from D to F measures 25°. If EF = 10 yd, find DE

Trigonometry
solve: sec x-2^.5=0

physics
an electric hot water heater takes in cold water at 13.0 degrees celsius and delivers hot water. the hot water has a constant temperature of 45 degrees celsius when the "hot" faucet is left open all the times, and the volume flow rate is 5.0 x 10 ^-6 m^3/s. what is t...

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