# Posts by lori

Total # Posts: 500

**Statistics**

In a given normal distribution, the standard deviation is 14.4 and 8.27% of the distribution lies to the left of 60. What is the mean?

**Statistics**

What z-value corresponds to the 18th percentile?

**Chemistry**

I am currently working on drawing isomers and find that I become way too creative in my structures. It would be helpful to know how many I should come up with... All isomers of C5H10O that contain a carbonyl group. I am looking for a number/count of them. Thanks is advance!

**Math**

Where do I inerst parenthesis to make the following statement true: 56 divided by 3 +4 x 1 + 2 =24

**Statistics**

If I deal you one card from a standard deck of 52 and it is a face card, I will give you a $5.00 bill. There are 12 face cards. There is one catch: You have to pay me something to play this game. How much would that be if the game is to be fair?

**statistics**

A student takes a 20-question, true/false exam and guessed on each question. Find the probability of passing if the lowest passing grade is 15 correct out of 20.

**Psydag--stat**

Thank you very much--I too finally got this answer.

**Psydag--stat**

An insurance company insures a person's antique coin collection worth $20,000 for an annual premium of $300. If the company figures that the probability of the collection being stolen is 0.002, what will be the company's expected profit?

**Stat**

An insurance company insures a person's antique coin collection worth $20,000 for an annual premium of $300. If the company figures that the probability of the collection being stolen is 0.002, what will be the company's expected profit?

**Statistics**

This is familiar to me--the answer from my book is 0.027. ????

**Statistics**

Working of a problem--I have found the mean, variance and the standard deviation from the following info: The probability that a cellular phone company Kiosk sells X number of new phone contracts per day is shown below---- X=4, 5, 6, 8, 10 P(X)=0.4, 0.3, 0.1, 0.15, .0.05 Mean...

**Statistics**

Sorry--I guess I was using the logic that with so many people using this that my questions may have been overlooked. I have had a couple questions that haven't been addressed this week. Again, sorry for the inconvenience. I truly appreciate the help.

**Statistics**

Working of a problem--I have found the mean, variance and the standard deviation from the following info: The probability that a cellular phone company Kiosk sells X number of new phone contracts per day is shown below---- X=4, 5, 6, 8, 10 P(X)=0.4, 0.3, 0.1, 0.15, .0.05 Mean=...

**Statistics**

At one college, 2/3 of the professors have doctorates. If a student signs up for 5 classes, what is the probability that 4 of the professors will have a doctorate? I have difficulty defining the X in the binomial distribution?????

**Statistics**

I get this!!

**Statistics**

37% of all doctors are family practitioners. If there are 300 doctors in one city, what is the standard deviation for the number of family practitioners? What is the expected value for the number of family practitioners?

**Statistics**

The probability that a person owns a microwave oven is .75, that a person owns a compact disk player is .25, and that a person owns both a microwave and a CD player is .16. Find the probability that a person owns either a microwave or a CD player, but not both.

**Statistics**

The probability that a person owns a microwave oven is .75, that a person owns a compact disk player is .25, and that a person owns both a microwave and a CD player is .16. Find the probability that a person owns either a microwave or a CD player, but not both.

**Statistics**

Any one want to take stab @ this??

**Statistics**

Box A contains 4 red and 6 blue balls. Box B contains 5 red and 10 blue balls. A box is selected at random and a ball is drawn. Find the probability that the ball is blue, given that it came from Box B.

**statistics**

That is what I got on my quiz--answer he told me was 10/19??

**statistics**

Box A contains 4 red and 6 blue balls. Box B contains 5 red and 10 blue balls. A box is selected at random and a ball is drawn. Find the probability that the ball is blue, given that it came from Box B.

**Statistics**

A manufacturer makes two models of an item: model I, which accounts for 80% of unit sales, and model II which accounts for 20% of unit sales. Because of defects, the manufacturer has to replace (or exchange) 10% of its model I and 18% of model II. If a model is selected at ...

**statistics**

Box A contains 4 red and 6 blue balls. Box B contains 5 red and 10 blue balls. A box is selected at random and a ball is drawn. Find the probability that the ball is blue, given that it came from Box B.

**statistics**

A coin is weighted in such a way that a tail is twice as likely to occur as a head. If the coin is tossed twice, what is the probability of obtaining two tails?

**statistics**

P(A)=.37, P(B)=.19, P(A and B)=.13. What is the probability that A doesn't occur or B does?

**statistics**

P(A)=.37, P(B)=.19, P(A and B)=.13. What is the probability that A doesn't occur or B does?

**statistics**

In a box of thirty AAA batteries, there are three defective batteries. Two batteries are randomly selected and tested. What is the probability that both are defective, if the first one is not replaced after being tested?

**Statistics**

Thank you for trying--appreciate it.

**Statistics**

I seem to get 0.167--book has 0.1157

**Statistics**

Roll two standard dice and add the numbers. What is the probability of getting a number larger that 9 for the first time on the third time.

**Statistics**

the answer the book is 243/1024

**Statistics**

In a department store there are 120 customers, 90 of whom will buy at least 1 item. If 5 customers are selected at random, one by one, find the probability that all will buy at least 1 item.

**Math**

An aircraft manufacturer determines that one of it's aircrafts has twice as many seats as another. Find the number of seats for each aircraft if the total number of seats is 336.

**algebra**

What is 7/16+2x=9/8 if you solve for x?

**Algebra**

If a pro basketball player has a vertical leap of 25 inches, what is his hang time? Use the hang time function V = T^2 Hang time is _________ seconds. Simplify the answer. Type an integer or a decimal Round to the nearest tenth. The answer I came up with is .52 seconds. Can ...

**algebra**

Thank you, I thought I was on the right track but wasn't sure.

**algebra**

Find the variation constaant and an equation of variation where Y varies directly as X and Y = 72 hen X = 8 The variation constant is K = ? The equation of variation is Y = ? I think that K = 9 but not sure I don't have a clue about the rest.

**IT210 week7/ DQ1**

• Due Date: Day 2 [Main] forum • Please post pseudocode or code showing how you would access a file as either a database or a sequential file. Describe in your code the differences between accessing the data. Post what is needed for this weeks assignment.

**Algebra**

Describe a process you can use to simplify a radical. Give an example in your answer.

**INB 205**

Wal-Mart Taking on the World Minicase Thank you Ms Sue. Now I need to find: Some statistics in regard to GNP and future growth potential for expanding Wal-Mart into India. What are the Government and Public Attitudes about American Products? Promotional Methods specific to ...

**INB**

I need to create a 7-12 slide powerpoint with 3 references for Wal-Mart Takes on the World Minicase. I don't know where to begin and I have a difficult time with research. Consider the following scenario: Your boss, the CEO of Wal-Mart, is interested in expanding ...

**Math**

Explain why this statement is true: when simplifying rational expressions, we must cancel factors only, and not terms. Give an example using just numbers.

**International Business**

Thank you

**International Business**

I would like to know what is viewed as a handout in a college level course. I have the two sites that I need to use as a reference but I was not sure if a table would be appropriate to list the informaton needed. I just don't know where to begin.

**International Business**

I have to create a 2 page handout for the following scenaario: Your company has developed a product that is all but guaranteed to be successful in any country that has a substantial population. The sales and marketing department would like you to do some research and find out ...

**AED**

Explain why this statement is true: when simplifying rational expressions, we must cancel factors only, and not terms. Give an example using just numbers.

**algebra**

Simplify the answer. Type coefficient as integers or decimals. (1.4x^3+4.8x^2-3.3x)-(-4.9x^3-4.3x^2+86)

**math**

Describe what the interval ( -7, 12) looks like

**geometry**

Draw two parallel lines on your paper. Locate four points on the paper each an equal distance from both lines. Describe the figure you get if you continue to locate points each an equal distance from both lines

**Eth 125**

Could somone check my grammar for me. I am not the best and could use some help. Thanks. • Imagine yourself as a current member of your selected group, and consider the following question: Would I want to immigrate to the United States, and why? Think about what opinion ...

**Finance**

Lee-Foods, Inc., sells 55-pound bags of tomatoes for $12 a bag. The fixed costs of this operation are $79,000, while the variable costs of the tomatoes are $.11 per pound. Please help, I have worked this out like this please tell me if this is correct FC $79,000 = $79,000 = my...

**math**

Explain in your own words why the line x = -8 is a vertical line.

**math**

70/3276 = 100/x 70x = 327600 x = 4680

**COM 220**

what is the thesis statement for A Nation Torn Apart

**math**

3{[3(x-5)+15]-[3(4x-3) +3]}

**Math**

3{[3(x-5)15]-[3(4x-3) +3]} I need help to simply this. I have been working on this for 2 hours and still don’t get it, can anyone help?

**Algebra**

3{[3(x-5)15]-[3(4x-3) +3]} I need help to simply this. I have been working on this for 2 hours and still don’t get it, can anyone help?

**Socials**

Seven Years War where were over 300 british men women and children massacred in 1757

**Math**

The total amount being spent on personal calls in a month by employees of a company follows a normal distribution with a mean of $900 and a standard deviation of $50. Find the probability that in a randomly selected month the amount spent on personal calls is less than $750

**Math**

Use patterns or a linear equation to complete the table. P 2 88 8 10 ? Q 22 ? 110 110 330

**Physics**

Who were two historical figures (scientists) that contributed to the process of mantle convection and plate movement?

**algebra**

Give the equation of the circle with center at (0, 2) and radius = 5

**math**

That's what I got, too. Thank you! I just wanted to be sure I was doing the problem right.

**math**

Give the equation of the circle with center at (0, 2) and radius = 5

**algebra**

without graphing, identify the slope and the y-intercept for the line associated with the equaiton. 5x + 20y = 60

**PreCalc**

An isosceles triangle is a triangle with two sides that are the same length. Find the measure of the two equal angles to the nearest degree in a triangle that has sides of length 5ft., 5ft., and 6ft.

**Precalc**

Find the smallest positive answer to the equation: sin(2x)=1

**Algebra**

Thank you for your help!

**Algebra**

2 (3a - 4) - 2 (4a + 3) simplify 2 (a + 4) = 4 (a - 3)solve the equation Any help would be appreciated, I am still learning. Thanks!

**MATH**

Thank you

**MATH**

Solve the equation 5(n+3)=2(2n+6) Simplify 4(x-1)+2(x+4)

**MATH**

Solve the equation 5(n+3)=2(2n+6) Simplify 4(x-1)+2(x+4)

**calculas**

f(x)=ln[(1+e^2x)/(e^2x-4) find the derivative

**calculus**

Find an equation of the line tangent to 2x^2-x-ln(x-4)-y^2=9 at (5,6)

**MATH 157**

You would have to count the letters which meet that criterion based on how they were drawn. If we base it on the font that is used have A E F H I K L M N T V W X Y Z and not B C D G J O P Q R S U that's 15 you would add 15 plus 10 to get the answer of 15 out 36

**MATH-157**

A prime number can only be divided evenly by itself and 1. (It must be a positive whole number greater than 1) 1, 2, 3, 4, 5, 6 which of these numbers can be divided by itself and 1. This will give you the answer.

**Math 157**

Thank you!

**Math 157**

A = pi x r^2 A = 3.14 x 7 x7 A = 153.86 20/153.86 = $0.13 per square inch

**Math 157**

A 7 inch pizza cost $8 and a 14 inch pizza costs $20. Tommy says the smaller pizza is a better buy because the larger pizza is twice as big and more than twice as expensive. Do you agree with his reasoning? Explain why or why not.

**Business**

What is a joint stock company or a scenario that explains one?

**algebra**

car travels 20 mins., bike travels 45mins. the same distance. Car goes 4.5 mph faster than bike. How far is the distance of travel?

**English**

PLEASE HELP! I am stuck on writing A descriptive essay 500-750 world, My Topic An elderly person

**Math**

unscramble the letters UEEMTTRARR to make a math word

**Business**

can you help me with this if you can In reviewing the office's profit and loss statement, the office manager notices a discrepancy between the stated revenue and cash deposits. In fact, it appears the office may have incorrectly booked $250,000 in revenue for the month. If...

**Business**

can you help me with this if you can In reviewing the office's profit and loss statement, the office manager notices a discrepancy between the stated revenue and cash deposits. In fact, it appears the office may have incorrectly booked $250,000 in revenue for the month. If...

**Microbiology**

describe the factors that may alter the expression of the cultural characteristics of bacteria?

**sci275**

I believe that national forests should be left in their natural state in which resources are not to benefit humans. This all goes back to my worldview which is in between the two extremes. There has to be a happy medium between raping every inch of the earth of its natural ...

**English**

I NEED HELP PLEASE!!! I need a 5 paragrph mini theme on " Pizza Is The Perfect Meal". For each paragrphs I need 2 references. PLEASE, PLEASE, HELP SOON.

**Trig**

What is the exact value of cot(4pi/3)? Do not use a calculator.

**algebra 1**

PLEASE HELP SOLVE.... 8+2>4(2))+1

**Math**

PLEASE HELP!!!NEED TO SOLVE: 5-(3)<10(-3)= 3<2x+1<9= 13<3x+5<29= 12<-4y+8<16= 5>x+2>-7= 5<2-x<7= PLEASE HELP DUE A.S.A.P. THANK YOU.

**trig**

A wind storm caused a 64 ft pole to lean due easwt at an angle of 63.8 degrees to the ground. A 106 ft long guy wire is then attached to the top of the pole and anchored in the ground due west of the foot of the pole. How far from the foot of the pole is the guy wire anchored?

**Algebra**

PLEASE HELP! 1. Part 1: Using the digits 4 and 10, and the variable x, write an equation and solve. Part 2: Using the digits 4 and 10, and the variable x, write an expression and simplify if neccessary. 2.Equation: 10 + 4 = x 14=x Expression: 10(4 + x) Example to solve: 103y=5...

**science**

Question 1 is ( d ) Question 2 is ( b )

**1st grade**

1. The first law of motion states that every object will remain at rest or in uniform motion in a straight line ,unless compelled to change its state by the action of an external force. 2. The second law of motion explains how the velocity will change. The law defines a force ...

**algebra**

Soybean Meal Is 16% Protein; Cornmeal Is 8% Protein. How Many Pound Of Each Should Be Mixed Together In Order To Get 320 Lb. Mixture That Is 12% Protein?

**algebra**

the lenghth of a rectangle is fixed at 20cm what widths will make the perimeter greater than 72cm?

**pre-cal**

what are the steps to solve sec y sin (pi/2-y)=1

**Math**

-6(1+2x) = 78 -6+ -12x = 78 6 -6 - 12x = 78 + 6 -12x = 84 -12x/-12 = 84/-12 x = -7