Wednesday
July 23, 2014

Posts by pat


Total # Posts: 645

Math
Which of these rational numbers does the Rational Roots Theorem say can't be a solution to 14x7 + 13x5 − 19x4 + 7x2 − 6x − 21 = 0? A. 3/2 B. 2/7 C. -1 D. -(1/2)

statistics
6. Facebook reports that the average number of Facebook friends worldwide is 175.5 with a standard deviation of 90.57. 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 190 friends or more?

algerbra
Katy has a rectangle field that is 700 feet wide one portion of the field is 2x long the other portion is 14y. Use the distributive property to find an expression for the area of the field.

algebra
5t-10t^2÷5t

algebra
5t-10t^2÷5t

Physics
As a swimmer pulls his arm through the water, various muscles exert forces on the upper arm. The figure below shows a force F exerted on the humerus (upper arm bone) by the pectoral muscle. The muscle is connected to the bone d = 7.00 cm from the center point O of the shoulder...

math
please just say the darn answer

Parent
the perimeter of the triangle is 55 inches. what is the value of X?

Physics
also include the units please. im not sure if i have the right answer because the site tells me my units are wrong, so for all i know i have the right answer but i cant tell

Physics
Compute the angular momentum of the earth arising from the following motions. (a) Earth's orbital motion around the sun. (b) Earth's rotation on its axis.

Physics
Find the angular velocity of a clock's second hand and the linear speed and linear acceleration of a point on the second hand 7.54 cm from the rotation axis.

Physics
Two blocks move along a linear path on a nearly frictionless air track. One block, of mass 0.120 kg, initially moves to the right at a speed of 4.90 m/s, while the second block, of mass 0.240 kg, is initially to the left of the first block and moving to the right at 7.40 m/s. ...

Physics
Two blocks move along a linear path on a nearly frictionless air track. One block, of mass 0.120 kg, initially moves to the right at a speed of 4.90 m/s, while the second block, of mass 0.240 kg, is initially to the left of the first block and moving to the right at 7.40 m/s. ...

math
a social security number contains nine digits such as 074-66-7795. how many different social security numbers can be formed?

stats
1. Find the sample variance and standard deviation 6, 53,11,49,35,26,28,28,31,31 s squared = (round to the nearest hundredth as needed)

math
3B216 + 2B316 =

math
Divide 332 by 2 (base 4)

Math
Thanks Steve

Math
please convert decimal numbers to binary 32.75 10th power

economics
1. Suppose that as the price of Y falls from $3.00 to $1.00 the quantity of Y demanded increases from 10 to 18. Compute the price elasticity of demand. Is the demand elastic or inelastic?

Math
Let p -> q represent the conditional statement All hummingbirds love nectar. This is equivalent to p = If it is a hummingbird and q = then it loves nectar. State your answers to the questions below both in words and in symbols. 1. What is the contrapositive of this stateme...

Math
Please I am having a hard time with these. Let p be: it is wrong to smoke in public Let q be: secondary cigarette smoke is a health threat Let r be: the American Lung Association says that secondary cigarette smoke is a health threat Can you answer these questions? A. What wou...

math
Equivalencies If A, then B is equivalent to If not B, then not A Not (A and B) is equivalent to not A OR not B Not (A or B) is equivalent to not A AND not B Can you give an equivalent statement to 1. If an Iowa farmer does not grow corn or beans, then he grows alfalfa. 2. It i...

Math
Thank you Ms Sue. I was scrolling through the thread and my eyes where bugging out

Math
Is there a way to get an message or I have to scroll through these Maths to find me because I can't find mine

math
If A, then B is equivalent to If not B, then not A Not (A and B) is equivalent to not A OR not B Not (A or B) is equivalent to not A AND not B Can you give an equivalent statement to 1. If an Iowa farmer does not grow corn or beans, then he grows alfalfa. 2. It is not true tha...

math
What is the negation for these Original……-> Negation Some are....---->None are Some are not--->All are All are... ---> Some are not None are..---->Some are 1. Some basketball players are tall. 2.All roses are flowers. 3. No dogs are cats. Some question...

math
Can you each make up an example in which "Some A are not B" is true, but the statement "Some B are not A" is false? An example would be "Some dogs are not poodles" is true but "Some poodles are not dogs" is false

math
if the universal set U is defined by U={1,2,3,4,5,6,7,8,9,10}and A={1,2,3,4} B={3,4,5,6,7} what is contained in A n B'=the intersection of A and B'?

Statistics
(TCO A) Consider the following age data, which is the result of selecting a random sample of 20 United Airlines pilots. 47 45 45 52 58 55 58 44 42 38 45 52 48 47 51 45 52 42 37 40 a. Compute the mean, median, mode, and standard deviation, Q1, Q3, Min, Max for the above sample ...

math
Find the x-intercept and y-intercept for y=-5+1

Statistics
A conservative correction method for inflated "Alpha values" based on multiple comparisons being carried out independently on a specific data set, is known as...? A. Ad Hoc Testing B. Tukey's honestly significan differences (HSD) C. Post Hoc testing D. Bonferroni...

Statistics
In conducting multiple regression analyses (MRAs), a major technical concern involves any high correlation of predictor (regressor) variables included in the model. The term for this is ....? A. Redundant predictors B. Close "knit" IVs C. Multicollinearity D. Correla...

Statistics
Parametric procedures of quantitative analysis make an underlying assumption that...? A. Dichotomous variables have been "smoothed" B. The variables are measured at least at an ordinal level. C. All responses are measured in a mutually exclusive manner D. The underly...

Statistics
Analysis of Variance (ANOVA) results in the calculation of the F Statistic and interpretation of this statistics will inform you as to...? A. Which means significantly differ from the others. B. How the variables are associated with each other. C. Whether one or more of the me...

Statistics
To make causal inferences from observed differences between groups based on varied levels of treatment, it is necessary to...? A. Find significant differences between groups at at-least the .05 level B. Use T-test or ANOVA procedures to conduct the analysis C. Have random assi...

Statistics
When conducting an inferential statistical analysis, and applying a conventional "critical p-value" of .05, the odds of making a Type I Error and "rejecting a true Null Hypothesis" is? A. 1 in 30 B. 1 in 100 C. 1 in 20 D. 1 in 10

statistics
What would a person's numerical score be if someone scored two Standard Deviations above the Mean on a standardized test where the Mean = 100 and the Standard Deviation =15?

statistics
What formula is used to calculate the Standard Error of Measurement?

statistics
What do independent trials in relationship to probability theory mean?

statistics
A "Set" within quantitative theory represents ...?

statistics
What particular measure of correlation would be most appropriate for use with two variables measured at an ordinal level?

math
what is the correct order of operations for calculations of basic math problems?

statistics
What are the defining characteristics of the Ratio Level of Measurement?

chemistry
how much heat is released wen 10g of steam at 100 degrees c is cooled to 10g of liquid water at 100degrees c?

english
In Great expectations, how is pip different from the convict in chapter l?

Algebra2
Are these right?! Absolute value : 1. |x^2-2x+16|=8 x=-4 x=-3 x=-2 x=2 2.|3x-2|=7 x=5\3 x=3 3. |3x+2|+3=0 x= -5/3

math
Equivalencies?? If A, then B is equivalent to If not B, then not A Not (A and B) is equivalent to not A OR not B Not (A or B) is equivalent to not A AND not B Can you give an equivalent statement to 1. If an Iowa farmer does not grow corn or beans, then he grows alfalfa. 2. It...

Financial Planning
What are the long term and short term effects of credit and debt?

Statistics
n1-25, n2-36, s1 power 2=50, s2 2 power=72, m1=100. m2=105

math
wheels are 1.25 inches in diameter and the fastest speed is 3ft/second maximum distance to travel is 16 x (18cm)

porpotions
Carlos goes to a local deli for lunch and orders a sandwich. He needs to choose a bread, a meat, a vegetable, a cheese, and a sauce. How many sandwich combinations are possible? Assume Carlos always picks only one item from each category. Bread: Italian, rye, wheat, white, ses...

Statistics
A study was conducted in order to estimate u, the mean number of weekly hours that U.S. adults use computers at home. Suppose a random sample of 81 U.S. adults give a mean weekly computer usage time of 8.5 hours and that from prior studies , the population standard deviation i...

Statistics
How large a sample of U.S. adults is needed in order to estimate U with a 95% confidence interval of length 1.2 hours?

math
what does it mean to describe the context in which a equation is used. describe the meaning of a equation and the meaning of the variables.what is meant by solution of a equation. my equation is y=2x+3

microeconomics
Individuals in a market who must take the market price as given are?

PHYSICS
1. A 500.0 g metal block absorbs 1.125 × 104 J of heat to raise its temperature by 50.0 K. What is the substance?

PHYSICS
If you increase the distance between two identical point charges so that the new distance is five times the original distance, what happens to the force between them? I know it is suppose to be divided by 25 but why?

maths
Five members of staff had their till sales analysed. Andrew scored higher than Amanda who didn`t have the lowest score. Angela had the highest score and Sally scored more than David but less than Andrew. Who had the lowest score?

Physics
Before a nuclear reaction, there is 0.01000 kg of uranium. After the nuclear reaction, there is 0.00950 kg of uranium. How much energy was released? (h = 6.63 × 1034 Js)

Physics
Two objects are near a bar magnet. One is about 1 cm away, while the other is 6 cm away. Compare and contrast the magnetic force that affects each object. What do they want me to do?

Physics
The minimum frequency for the photoelectric effect of a zinc plate is 9.7 × 1014 Hz. What will be the kinetic energy of an ejected electron when a photon with a wavelength 200 nm (2.00 × 10 7 m) strikes it?

Honors Physics Question
Two objects are near a bar magnet. One is about 1 cm away, while the other is 6 cm away. Compare and contrast the magnetic force that affects each object. What do they want me to do?

PHYSICS
A coil with an area of 0.10 m2 is in a magnetic field of 0.20 T perpendicular to its area. It is flipped through 180° so that the part that was up is down. The flip takes 1.0 s. Estimate the average induced emf between the ends of the coil while it is being flipped. What f...

PHYSICS
A straight 1.2 m length iron rod is moved at 10 m/s through the earth's magnetic field at a location where it has magnitude 1.0 × 105 T. What is the magnitude of the induced emf between one end of the wire and the other end? What formula do I use?

physics
A wire loop has an area of 0.12 m2, and the magnetic field through it increases from 0 to 0.20 T in 0.30 s. What is the induced emf in the loop?

Physics
According to Boyle's law, the volume V of a gas at a constant temperature varies inversely with the pressure P. When the volume of a certain gas is 125 cubic meters, the pressure is 20 psi (pounds per square inch). If the volume of gas is increased to 400 cubic meters, the...

physics
current through a device is 0.30 A, and the resistance in the device is 40 Ù. How many 1.5 V batteries are required to run the device

Physics
each resistor in the circuit shown is 5.0 Ù, and the battery is 12.0 V, what does the second ammeter (A2) read?

Change boring verb and ordinary adjectives
bill get angry with his sister

physics
A boy drops a 0.10 kg stone down a 150 m well and listens for the echo. The air temperature is 20°C. How long after the stone is dropped will the boy hear the echo? The speed of sound through air at 20°C is v = 343 m/s.

Lost in Physics
The strength of an electric field at 5.0 cm from a point charge is 100.0 N/C. What is the magnitude of the source charge? Show work so I understand how to do it. E=kQ/r^2 solve for Q, you have r, E What do I do NOW? I am lost

Physics
Calculate the force between a +5 µC test point charge and this source charge at a distance of 2.00 cm. (µC = 1.0 × 10–6 C) force=kq1q2/r^2 Have the formula now what do I do?

Physics
A 5.0 µC point charge is moved within an electric field and has an electric potential energy change of 10.0 J. What is the electric potential difference before and after the charge was moved? Show work. (µC = 1.0 × 10–6 Vq=energy so delta V must be 10 vo...

Physics
If the test charge were moved closer to the source charge, would the change in its potential energy be positive, negative or zero? Explain.

Physics
Calculate the force between a +5 µC test point charge and this source charge at a distance of 2.00 cm. (µC = 1.0 × 10–6 C)

Physics
A 5.0 µC point charge is moved within an electric field and has an electric potential energy change of 10.0 J. What is the electric potential difference before and after the charge was moved? Show work. (µC = 1.0 × 10–6 C)

Physics
If I knew how to do it with formula I would have done it.

Physics
The strength of an electric field at 5.0 cm from a point charge is 100.0 N/C. What is the magnitude of the source charge? Show work so I understand how to do it.

chem
What volume of a 2.5 M stock solution of acetic acid (HC¿HÀO¿) is required to prepare 100.0 milliliters of a 0.50 M acetic acid solution?

Math
Determine the total amount of interest you will pay over the next 3 months on a credit balance of $725 if your credit card has an annual interest rate of 18% and you make monthly payments of 10% of the amount due, rounded to the nearest dollar.

Chemistry
When a mixture of sulfur and metallic silver is heated, silver sulfide is produced. What mass of silver sulfide is produced from a mixture of 3.0 g Ag and 3.0 g S8? 16 Ag(s) + S8(s) > 8Ag2S(s)

Chemistry
yes

Chemistry
This is all the info I have DrBob222 I don' have a solubility table. It doesn't say how much solution either,huh, is this something that can be answered?

Chemistry
Thank you DrBob222 for your help!

Math
A spinner is divided into 20 equal sections and are numbered 1 through 20. What is the probability of the spinner's pointer landing on section 5?

Math
In 2004, your family bought a new car for $15,000. Each year the value of the car is decreasing approximately 15% per year. Your father plans to keep the car 5 years before he buys another new car. What will be the value of the car when he's ready to trade? What is the for...

english
which of the following is a simple sentence? a)karen and david arrived at the airportat 3:35pm and took a taxi to their hotel b)i went to the airport ,but i was too late to meet them

social studies
Which of the following statements should not be included in the general principles of self-evaluation in a child care facility? A. The knowledge that a self-evaluation is taking place should be restricted to the program director. B. Self-evaluation should take place at regular...

statistics
A TV pollster believes that 75% of all TV households would be tuned in to Game 6 of 1997 NBA Championship series between the Chicago Bulls and the Utah Jazz. A sample of 1000 TV households was selected and 722 indicated they were tuned into the game. Find the Standard Error fo...

Math
$1000 in a savings bond on the day you were born. The bond pays 6% interest compounded annually. How much is it worth in 18 yrs? I know it earns $60 a yr. but I am lost after that.

statistics
A TV pollster believes that 75% of all TV households would be tuned in to Game 6 of 1997 NBA Championship series between the Chicago Bulls and the Utah Jazz. A sample of 1000 TV households was selected and 722 indicated they were tuned into the game. Find the point estimate fo...

Math
You invest $7,000 in a two-year CD. At the end of the 2 years, you receive $8,331.97. Assume you left the first year' s interest in the account, what was your yearly interest rate?

English
Reminds me of movie and a book I read!

statistics
The time it takes Jessica to bicycle to school is normally distributed with an average of a third of an hour and a variance of 9 minutes. Jessica has to be at school at 8:15 am. What time should she leave the house so she will be late on 5% of the time?

statistics
An agricultural economist is interested in determining the average diameter of peaches produced by a particular tree. A random sample of 50 peaches is taken and the sample mean calculated. Suppose that the average diameter of peaches on this tree is known from previous years&#...

statistics
the dean of admissions in a large university has determined that the scores of the freshman class in a mathematics test are normally distributed with a mean of 86 and a standard deviation of 11. A sample of 50 students is selected at random from the entire freshman class. Base...

Physics
You have a 2.00 kg block of lead. Lead melts at 327.5°C. CPb = 130.0 , and Hf for lead is 2.04 × 104 J/kg. Say you start at room temperature (25.0°C). How much heat must you transfer to melt all the lead?

math
if one boy runs 2 3/5 miles a day for 4 days and another boy runs 10 miles in 4 days who runs further?

Physics
A 500.0 g metal block absorbs 3.25 × 103 J of heat to raise its temperature by 50.0 K. What is the substance? Please show steps because I have several problems like this and then I can see where I am goibg wrong

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