Tuesday
July 22, 2014

Posts by Jennifer


Total # Posts: 2,005

Stats
yay!! thank u!!

Stats
Z = 64-51/5.0 = 13/5.0 = 2.6 Z = 47-51/5.0 = -4/5.0 = -0.8 Is this correct?

Stats
A Math test has a mean of 51 and standard deviation of 5.0. Find the corresponding z scores for: I. a test score of 64 II. a test score of 47

Stats
okay so the first would be 0.75 correct? the second one would be 3 = -16.46 -3 = -16.46 is this correct?

Stats
1. Z = (s-205)/11 = 205/11 = 18.63??? This one confuses me 2. I have no idea how to do this.... Please help!!

Stats
I. Use Chebyshev’s theorem to find what percent of the values will fall between 183 and 227 for a data set with a mean of 205 and standard deviation of 11. II. Use the Empirical Rule to find what two values 99.7% of the data will fall between for a data set with a mean of...

Stats.....plz help me.....
Given the following frequency distribution, find the mean, variance, and standard deviation. Please show all of your work. Errors Frequency 51-53 9 54-56 19 57-59 16 60-62 24 63-65 25

Math
How are z scores and the "empirical rule" related?

Math Help
looks correct to me

Stats
Given the following frequency distribution, find the mean, variance, and standard deviation. Please show all of your work. Errors Frequency 51-53 9 54-56 19 57-59 16 60-62 24 63-65 25

Can someone help me please?
Statistics confuses me....thank you for your help :)

Can someone help me please?
A set of 50 data values has a mean of 15 and a variance of 25. Find the standard score of a data value = 20

Help plz!! Math....
hmmmm....this is so confusing for me....

Help plz!! Math....
I apologize...thank you....so is it A data point of 20 is one standard deviation above the mean of 15, so the standard or "z" score is 1.0

misin ideas
regular aerobicise an individual more endurance tha show cause and effect

Chemistry
When a 5.50g sample of solid sodium hydroxide dissolves in 100.0 g of water in a coffee cup calorimeter, the temperature of rises from 21.6 degrees C to 37.8 degrees C. Calculate Change of heat for the reaction in kJ (also in kJ/mol NaOH) for the solution process. Assume the s...

algebra
Find the length of the golden rectangle whose width is 14.72

Fibonacci numbers
I have been working on this question all day and can not figure out what to do. The question says according to the Quadratic Formula, the solutions of x^2-x-1=0 I know the positive solution is the golden rule ratio and the negative solution is the conjugate of 0(with a slash t...

algebra - reply to answer
why is this a poor model for hitting a baseball? y = -0.002x^2 + 0.879x + 3.981 I know it gets hit at approx. 4 feet high. The -a gives the right shape like a hill. There's a -4.48 and 443.95 zero, which can be hit for distance. The max is (219.75, 100) so that seems doabl...

algebra Please Help
New question: A baseball was 2.74 feet above ground when it was hit. It reached a max. height of 116.3ft when it was approx 215.3 ft away from where he hit the ball. The ball lands after travelling a ground distance of approx 433.1 ft. Find an equation of form y = A(x-h)^2 + k...

algebra
why is this a poor model for hitting a baseball? y = -0.002x^2 + 0.879x + 3.981 I know it gets hit at approx. 4 feet high. The -a gives the right shape like a hill. There's a -4.48 and 443.95 zero, which can be hit for distance. The max is (219.75, 100) so that seems doabl...

algebra
Suppose the ball was 2.74 feet above ground when it was hit. It reached a max. height of 116.3ft when it was approx 215.3 ft away from where he hit the ball. The ball lands after travelling a ground distance of approx 433.1 ft. -- find an equation in form of y=C(x-z1)(x-z2) wh...

Microeconomics
Baseballs cost $5 and baseball gloves cost $20. Assume you have $100 total to spend on these items. Construct a table similar to the one on page 158. What is the point, based on the Equimarginal Rule, that has equal marginal benefit (or the closest) for the two purchases?

Biology
Can DNA control how many teeth we will have?

Fibonacci Numbers
Thank you Jennifer! I just figured out where I went wrong in wording the problem. a= 2x8=16 b=2x15=30 c=9+25=34 16^2+30^2=34^2 256+900=1156 1156=1156 Thank you for helping to guide me in the right direction. One more problem to go by Friday...I just may be calling on you!

Fibonacci Numbers
I think it is the fibonacci numbers and the wording of the word problem. I thought I had to add 4 and 2 together to get the 6 and then square it. I am just confused. Thanks

Fibonacci Numbers
This is not a test question, but I did not know what the appropriate topic for my question is. If I used the terms 2, 3, 4, 8 consecutive terms of the Fibonacci sequence. "a" is the first and fourth terms and "b" is twice the product of the second and third...

biology
Hi there! I have this question for my bio/genetics homework, and I can't seem to figure it out. It reads, "A true-breeding red snapdragon is crossed to a true-breeding white snapdragon. The F1 progeny are all red. When the F1 is selfed, the following F2 progeny are ob...

Fibonacci numbers
I have three problems to answer dealing with Fibonacci numbers. I understand the first two, but would like for reassurrance that they are correct and lost on the last one and could use some help. Thank you. 1. Fibonacci numbers can not be used more than once. Find sums for num...

statistics
For a distribution in which the mean is 100 and the standard deviation is 12, find the following: the percentile of a score of 106.

PHYSICS! HELP PLEASE
start the shopper at (0,0) After pushing the cart 43 m south, he's now at (0, -43) After turning west and pushing the cart 15 m, he's now at (-15, -43) Now he has to turn 90 degrees again. . . he will then be going either north or south. . . south will result in the la...

economics
Looks right to me!

Science
A 73 kg student traveling in acar with a constant velocity has a kinetic energy of 1.3 x 10^4 J. What is the speedometer reading of the car in km/h?

business law
what is the gist of proximate cause? why do courts struggle with its concept?

algebra
p^2+p+4=0

physics
a ball is thrown up with an initial velocity 20m/s. using g=10m/s2, a) what's the maximum height it can reach. b) what is the magnitude and direction of the ball's velocity 1 second after it is thrown. c) what is the magnitude and direction of the ball's velocity 3...

nursing evidence
_ _ _ _ _ _ _ _ _ 1. Information used to conduct our lives _ _ _ _ _ _ _ _ _ 2. To solve a problem by collecting the necessary pieces of information and putting them together _ _ _ _ _ AND _ _ _ _ _ 3. Try several approaches until one works _ _ _ _ _ _ _ _ _ 4. Do what feels l...

Chemistry
It still doesnt make aense because the answer comes out to 240 liters.

Chemistry
I still do not understand.

Chemistry
Calculate the amount of 6 M nitric acid you need to add to fully react with .5 grams of copper and add a 20 percent excess.

Trigonometry
In a right triangle ABC, C = 90°, B = 38° 35' and a = 6.434 mi. Solve for all the missing parts using the given information. (Round each answer to three decimal places for sides and to two decimal places for angle.)

Chemistry
Never mind, I figured it out

Chemistry
A 41 g piece of ice at 0.0 degree Celsius is added to a sample of water at 8.6 degree Celsius. All of the ice melts and the temperature of the water decreases to 0.0 degree Celsius. How many grams of water were in the sample?

chemistry
thought it asked for school, why does it matter anyways

Cypress
Suggest any limitations to the use of recrystallization as a purification method for a solid.

physics
I'm suppose to draw velocity time and acceleration time graph for a rocket that is launched vertically into the air and falls back down to its initial height. We are to assume that x axis is up. So would I draw an curved figure like a downward parabola or a straight vertic...

Chemistry
The label on a 1-pint bottle of mineral water lists the following components. If the density is the same as pure water and you drink 3 bottles of water in one day, how many milligrams of each component will you obtain? calcium 28 ppm

Chemistry
In the manufacturing of computer chips, cylinders of silicon are cut into thin wafers that are 2.80 inches in diameter and have a mass of 2.00g of silicon. How thick (mm) is each wafer if silicon has a density of 2.33g/cm^3? (The volume of a cylinder is V=(pi)r^{2}h.)

chemistry
nevermind, I just figured it out

chemistry
Suppose you have two 100-{\rm mL} graduated cylinders. In each cylinder there is 58.5mL of water. You also have two cubes: One is lead, and the other is aluminum. Each cube measures 2.0cm on each side. After you carefully lower each cube into the water of its own cylinder, wha...

Chemistry
In the explosion of a hydrogen filled balloon, 0.50 g of hydrogen reacted with 4.0 g of oxygen to form how many grams of water vapor? (water vapor is the only product)

Algebra
A car can average 140 miles on 5 gallons of gasoline. Write an equation for the distance "d" in miles the car can tavel on "g" gallons of gas?

algebra
3/11 minutes

math
keith scored 75,86,79,91 what score must he recieve on on the fifth test to have a mean of 85 ?

Physics
You are on a boat heading out to sea. The boat is going 5m/s toward a buoy (the origin in your chosen frame of reference) that is 300 meters away. How long will it take to be 500 meters beyond the buoy?

math
3. Indicate whether each of the given statements could apply to a data set consisting of 1,000 values that are all different. a. The 29th percentile is greater than the 30th percentile. (True or False) b. The median is greater than the first quartile. (True or False) c. The th...

statistics
how to do the problem? I'm lost

Macroeconomics
. Application 3 to chapter 15 (page 340) suggests increased health care expenditures will crowd out other expenditures. What component of GDP do you think will suffer? Using that same argument, Nebraska has debated casino gambling several times. Proponents say the additional e...

Maths
Find the gradient of the line joining the points (5,2) and (6,3)

math.
A theater purchases $500 worth of Sticky Bears and chocolate bombs. Each bag of Sticky Bears costs $1.50 and each bag of Chocolate Bombs costs $1.00. If a total of 400 bags of candy were purchased, how many bags of Chocolate Bombs did the theater buy?

Statistics
Twenty (20) students randomly assigned to an experimental group are studying for a test while listening to classical music. Thirty (30) students randomly assigned to a control group are studying for the same test in complete silence. Both groups take the test after studying fo...

comp/155 week 4 assignment
need help

MATH
A parking lot has 5 spots remaining and 5 different cars in line waiting to be parked. If one of the cars is too big to fit in the two outermost spots, in how many different ways can the five cars be arranged?

math
solve by the substitution method 5x+7y=6 -6x+y=21

Hum/205 college level
OK, I fixed it. The history of the Western Art is a steeped in religious symbolism; but all art is in one way or another, an extension of the religious urge in humanity. However to some westerners it is often difficult to leave the comfort domain of a familiar religious iconog...

Hum/205 college level
It saying there are no Run on sentence.

Hum/205 college level
can someone please look over this and tell me what you think?? thanks! The history of the Western Art is a steeped in religious symbolism; but all art is in one way or another, an extension of the religious urge in humanity. However to some westerners it is often difficult to ...

Philosophy
Our text discusses the challenge relativism presents to various ethical and religious viewpoints. Consider a specific moral question which might make it difficult to accept the relativist's response. State the moral issue involved, and provide an explanation as to why you ...

math
When m is divided by 7, the remainder is 2. What is the remainder when 4m is divided by 7? Please give me an explanation and not just the answer! Thankss:)

Physics
Your whole family has taken showers before you, dropping the temperature in the water heater to 18 degrees Celsius. If the water heater holds 150 kg of water, how much energy will it take to bring it to 50 degrees Celsius? If the energy is supplied by a 5 kW electric heating e...

College math 115
I need help with my assignment how much will it be to have someone help me with it it is due by tomorrow?

english, poetry meanings
using "a,b,c,d,e,f,g" notation, explain the ryme schem of "let me not to the marriage of true minds.

Intermediate Algebra
for the following equation, state the value of the discriminate and then describe the nature of the solutions, from the following statements. -20x^2-5x+3=0

Physics
You throw a ball horizontally off of a building with a horizontal velocity of 5 m/s. What's the ball horizontal velocity 8 seconds later? How high should the building be if you want the ball to fall for a total of 12 seconds?

Physics
If a car travel at an average speed of 80 km per hr for 20 min, and then slowed down to an average speed of 50 km per hr over the next 15 min. How far would it travel in total?

grammar
Although the abscess was incised and drained in the emergency room and cultures were obtained, which grew coag-positive staphylococcus. which of the below holds good for the above sentence. 1.This is a run-on that needs a semicolon after time. 2. This is a run-on that needs to...

Geometry
152.75

9th grade integrated algebra
tan[32degrees]=y/25 .6248693519=y/25 15.6

4th grade math
what is the next number in the pattern 5,3,7,5,9,7,11?

Algebra
Thanks!! for the help

Algebra
The point (-1,0) lies on a circle whose center is at (-6,5). Find an equation of this circle

Algebra
Thanks

Biology
The half life of carbon 14 is 5700 years. If the carbon 14 level measured in a fossilized bone has only 1/4 of the original amount, how old in the bone?

Trig
Consider a triangle ABC like the one below. Suppose that A=45 degress, B=34 degress, and a= 70. Solve the triangle. Round your answers to the nearest tenth.

Algebra
I have a parabola that I have to write as an equation I found the vertex as (-3,-2) and the following points (-4,-1)(-2,-1),(-5,2),(-1,2). I can't seem to come up with the correct equation. I'm using the formula y=a(h-k)^2+k but I'm not doing something right. Can a...

Trig
Yeah I was looking at that, thanks for clarifing

Trig
thanks for the help

Trig
Rewrite cos(tan^-1(v)) as an algebraic expression in v. Can someone help me with this problem? Thanks

Accounting
The SOO Company has machinery that it acquired a number of years ago at a cost of $812,000. As of December 31, 2012 the company has recorded life-to-date depreciation in the amount of $332,900. Because of changes in their manufacturing processes, the equipment does not functio...

English 102
I wanted to make sure that it all made sense. before I turned it in.

English 102
Can someone give me feedback on this please. Introduction Is same-sex marriage going to create issues in our society? Same-sex marriages will most likely produce issues in many political agendas. Religious leadership of Abrahamic faith everywhere will also be confrontational a...

social studies
Between 1935 and 1957, a period that included World War II, the birth rate rose from 16.9 to 25 per 1000 people. What was the most likely cause of this "baby boom"?

Algebra
A lot is in the shape of a right triangle. The shorter leg measures 90 meters. The hypotenuse is 30 meters longer than the length of the longer leg. How long is the longer leg?

drawing
Does anyone know for the work titled Blind MAn by William H. Johnson know what materials he used would it by tempura and printing paper? Also Does the artist use symmetrical or asymmetrical balance?

statistics
What is the critical value for 0.04, left tailed test? I dont know what to put as the %?! I also dont understand what to look up in the E table for the value of Z?! Thanks

Stat
the mean of adult men is 172 pounds with a standard deviation of 29 pounds. ask 20 men thier weight and use excel to calculate the mean. test the hypothesis that the mean is not 172 pounds at the .10 significance level. and how many men should be sampled if you want to be 98% ...

Math
The rate of change of sales volume is the derivative of S(t) S'(t) = dS/dt = 20,000 * -0.6 * e^(-0.6*t) Let t = 1, and find the value of S'(1)

statistics
Develop the estimated regression equation to predict the city score, given the Recession Resistance rating alone

Chemistry
If 100 grams of NI3 is detonated, calculate the Gram of N2 and I2 formed.

Chemistry
What is the mass of S2Cl2 if 342 grams of S8 is reacted with an excess of Cl2?

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