# Posts by Casey

Total # Posts: 710

Statistics
I already found part A just need help with B! The computer-science aptitude score, x, and the achievement score, y (measured by a comprehensive final), were measured for 10 students in a beginning computer-science course. The results were as follows. (Give your answers correct...

Statistics
Complete the hypothesis test with alternative hypothesis ƒÊd ‚ 0 based on the paired data that follows and d = O - Y. Use ƒ¿ = 0.01. Assume normality. Oldest 174 173 169 180 51 Youngest 168 169 175 187 53 (a) Find t. (Give your answer correct ...

Statistics
Thanks!!

Statistics
Find the value of z that would be used to test the difference between the proportions, given the following. (Use G - H. Give your answer correct to two decimal places.) Sample n x G 375 324 H 414 333

Statistics
Help Me Please! In a survey of families in which both parents work, one of the questions asked was, "Have you refused a job, promotion, or transfer because it would mean less time with your family?" A total of 200 men and 200 women were asked this question. "Yes...

Statistics
Please Help! If someone could just show me how to do a problem like this! The corrosive effects of various soils on coated and uncoated steel pipe was tested by using a dependent sampling plan. The data collected are summarized below, where d is the amount of corrosion on the ...

Statistics
Find the 99% confidence interval for the difference between two means based on this information about two samples. Assume independent samples from normal populations. (Use conservative degrees of freedom.) (Give your answers correct to two decimal places.) Sample Number Mean ...

Statistics
Please Help I'm desperate! Complete the hypothesis test with alternative hypothesis ìd < 0 based on the paired data that follow and d = M - N. Use á = 0.02. Assume normality. M 48 47 67 79 73 66 N 52 55 68 87 78 70 (a) Find t. (Give your answer correct to ...

Physics
A cart loaded with bricks has a total mass of 25.4 kg and is pulled at constant speed by a rope. The rope is inclined at 30.6 ◦ above the horizontal and the cart moves 18.4 m on a horizontal ﬂoor. The coeﬃcient of kinetic friction between ground and cart is...

Statistics
An April 15, 2002 report in Time Magazine stated that the average age for women to marry in the United States is now 25.9 years of age. If the standard deviation is assumed to be 4.3 years, find the probability that a random sample of 32 U.S. women would show a mean age at ...

Algebra
Graph inequalities -2x>18

Chemistry
An unknown compound contains only C, H, and O. Combustion of 4.50 g of this compound produced 10.2 g of CO2 and 4.19 g of H2O. What is this empirical formula of the unknown compound?

math
250

Math Homework, Help!!!!
A marble statue is 39 years old and a limestone statue is 97 years old. In how many years will the limestone statue be twice as old as the marble statue?

Algerbra
:o

Algerbra
i don't mean that

Algerbra
sure

Algerbra
3/4t-5/6=2/3t

Algerbra
Okay Thanks!!!

Algerbra
b=-8

Algerbra
2b=-16

Algerbra
2(4-2r)=-2(r+5)

Algerbra
But how did you get that answer? I tries 3 times and got a different answer

Algerbra
-2n=-46

Physics
a yellow lamp emits light with a wavelength of 6.00E-7 meters. Calculate the frequency of the yellow light.

algebra
(2X-Y)+7X(2X-Y)+10X

math
(X+2Y)+6X(X-2Y)+8X

AP Calculus
An open box is to be made from cutting squares of side 's' from each corner of a piece of cardboard that is 35" by 40". (a) Write an expression for the volume, 'V', of the box in terms of 's'. (b) Draw a graph of V(s). (c) State the domain and...

Algebra
thank you

Algebra
What is the factored form of 6x^4-21x^3-12x^2 ?

Algebra
Thank you to all

Algebra
A ball is thrown into the air. The height h, in feet, of the ball can be modeled by the equation h= -16t^2+20t+6, where t is the time, in seconds, the ball is in the air. When will the ball hit the ground? first should I use x= -b/2a?

Algebra
Sorry, I accidently clicked it an extra two times

Algebra
A circular mirror is surrounded by a square metal frame. The radius of the mirror is 5x. The side length of the metal frame is 15x. What is the area of the metal frame? Write your answer in factored form.

Algebra
A circular mirror is surrounded by a square metal frame. The radius of the mirror is 5x. The side length of the metal frame is 15x. What is the area of the metal frame? Write your answer in factored form.

Algebra
Thank you

Algebra
A circular mirror is surrounded by a square metal frame. The radius of the mirror is 5x. The side length of the metal frame is 15x. What is the area of the metal frame? Write your answer in factored form.

Algebra
How are the processes of adding monomials and adding polynomials alike? How are the processes different?

Algebra
Thank you.

Algebra
the angle of elevation from bottom to the top of the mountain has a measure of 60 degrees. suppose a ski lift to the top is 2000 feet long. how high is the mountain to the nearest feet? Am I suppose to find the sine of 60?

ABC
Do you mean how many integers are in between 21 and 47 inclusive?

AP Chemistry
Nevermind . . . the G value for Br2 isn't 0, which was throwing off my calculations. The answer ended up being 4.96x10^-20

AP Chemistry
So I have the reaction 2HBr(g) <--> H2(g)+Br2(g) I'm supposed to find the equilibrium constant, K, using free energy (G) values. The values in my textbook for G of H2 and Br2 were zero, and the value for HBr(g) was -53.5. So, to find delta G I did products - ...

MATH
But then when i try to factor i get 0=t^2-3t-12

MATH
WAIT ITS t^2 NOT 3t^2

MATH
Logv3(12) = logv3 (3t^2) - logv3 (3t) (the v means "log 3"- 3 is the base)

Math
Questions 22 , 23

physics
a proton (mass 1.67 x 10^-27 kg) with a velocity of 1.10 x 10 7 m/s collides with a motionless helium nucleus, and the proton bounces back with a speed of 6.00 x 10 6 m/s. The helium nucleus moves forward with a velocity of 4.00 x 10 6 m/s after the bombardment. What is the ...

chemistry
what is the molarity of a sodium hydroxide solution if 26.0mL of the solution os titrated to the end point with 57.5mL of a 0.500M hydrochloric acid solution

Math
A population of 75 foxes in a wildlife preserve quadruples in size every 15 yr. The function y= 75 * 4^x , where x is the number of 15 yr periods, models the population growth. How many foxes will there be after 45 years?

math
The answer is 280cm2, ill explain why... the picture's length is 60cm. The frame is 5 cm wide so u have to add five centimeters to the left and to the right which equals ten centimeters. 60+10=70cm. now you have to multiply four to it which = 280cm2 There.:D

Algebra
thank you

Algebra
Exponents: Simplify the expression 7ab^-2 / 3w I got 7a3w / b^2 Is this correct?

Trig
Whoops nevermind. I was thinking if they were 11pi/6 and -pi/6.

Trig
Is the angle 11pi/12 on the unit circle the same as the angle -pi/12? I'm thinking it would be, but I'm not sure.

physics
A 21.0-g metal cylinder is placed on a turntable, with its center 85 cm from the turntable's center. The coefficient of static friction between the cylinder and the turntable's surface is ìs = 0.83. A thin, massless string of length 85 cm connects the center of ...

math 5th
its 60 yards

Algebra
Solve the system of inequalities. y<2x+4 -3x - 2y> 6 So I just want y alone. For the second inequality, I added 3x to both sides and got -2y> 3x+6. Then I divided both sides by -2. I got y> -3/2 - 3 Do I have to switch the inequality symbol or something?

algebra
Write an inequality that describes the region of the coordinate plane not included in the graph of y<5x+1

Algebra
x+y=x-5 I want to get y alone on one side, so if I subtract x from both sides, what would be x - x?

Algebra
Suppose the modified quota is 2.77. Fill in the blanks, and round your answers to two decimal places. (a) Find the lower quota. (b) Find the upper quota. (c) Find the arithmetic mean of the lower and upper quotas. (d) Find the geometric mean of the lower and upper quotas. (e) ...

math

Physical Science
Greyhounds can accelerate at 7/m/s2 at a start of the race . How much force does it take a 35 kg dog to produce this acceleration?

Physical Science
How much force is required to give a 500kg crate an acceleration of 2 m/s2 on an icy surface without friction?

Physical Science
an object with a mass of 50kg is hurled at an acceleration rate of 30 m/s2. How much force was applied to the object?

physical Science
How much force is required to give an object with mass of 20kg an acceleration of 12m/s2 ?

physical science
on hole 9,Bill hit a golf ball. The golf ball weights 0.45 kg.The acceleration on the ball was 4/m/s2. What was the force of Bill swing?

Physical Science
Bill hit a ball with an acceleration of 40 ms2.The mass of the ball is 0.5kg. What is the force?

Algebra
Terrance skated 8 feet in 4 seconds at a constant rate how fast did he skate in feet per second

biology
Stem cells may open the door to discoveries about many diseases and may allow treatments for diseases to be developed. However many ethical issues surround stem cell research which need to be addressed by scientists, governments, etc. a. Explain why scientists would want to ...

stem cells
Stem cells may open the door to discoveries about many diseases and may allow treatments for diseases to be developed. However many ethical issues surround stem cell research which need to be addressed by scientists, governments, etc. a. Explain why scientists would want to ...

physics
A 20.0kg solid gold statue is raised from the sea bottom. What is the tension in the hoisting cable (assumed massless) when the statue is accelerating upward at 2m/s^2? (assume the statue is still completely underwater) The density of gold is 19.6x10^3kg/m^3

physics
A U-shaped tube contains a fluid of density 1.5x10^3 kg/m^3. the right side of the tube is closed, with vacuum above the fluid. The left side of the tube is open to the atmosphere. Assume the atmospheric pressure outside the tube is exactly 10^5 Pa. a) How much higher will the...

Math
set the equation to 0 and solve for t. you may have to use the quadratic formula...

Math
A rectangle is 6 cm long and 5 cm wide. When each dimension is increased by x cm, the area is tripled. Find the value of x.

Physics
A force of 310 N is applied horizontally to a crate in order to displace the crate 45.0 m across a level floor at a constant velocity. As a result of this work, the crate's internal energy is increased by an amount equal to 12 percent of the crate's initial internal ...

math
(1) 9.6 dividedby 1.2=8 (2) 57.8 divided by 3.4= 17 (3) 2.3 divided by 21.643= 941 (4) 0.51 dividd by 0.459= 9 (5) 0.16 divided by 3.8= 23 remainder 12 (6) 0.78 divided by 15.6= (7) 0.048 dividedby 7.2=150.0 help Ms. Sue

MATHS
thanks

MATHS
Find the area of the region bounded by the curve of sin x between x = 0 and x = 2π.

MATHS
A committee of two persons is selected from two men and two women. Find the probability that the committee will have at least one man.

Algebra 1
Find the final amount of an investment if \$2,000 is invested at an interest rate of 8% compounded quarterly for eight years. Please and thank you! I`ve been having so much trouble with this question. Thank you!

Physics
Angela, you so fine<3

Math. Increases again
The worlds pop in 1970 is estimated to be 3.7*10^9. The yearly growth rate is approximately 2%. How large would the world's pop be in 1980? Would i use log functions? please help.

Math. Increases
Do I do log functions for this question?

Math. Increases
The worlds pop in 1970 is estimated to be 3.7*10^9. The yearly growth rate is approximately 2%. How large would the world's pop be in 1980? Please show work. Thanks :)

Algebra 2
The excursion boat on the river takes 2½ hours to make the trip to a point 12 miles upstream and to return. If the rate at which the boat travels in still water is 5 times the rate of the river current, what is the rate of the current? Which of the following equations ...

Math.. due tomorrow morning!
Assume that each female rabbit of a colony gives birth to three female rabbits. How many female rabbits of the tenth generation will be descendants of a singal rabbit of the first generation?

Math. i need help!
Assume that each female rabbit of a colony gives birth to three female rabbits. How many female rabbits of the tenth generation will be descendants of a singal rabbit of the first generation?

physics
The three vectors in the figure below have magnitudes a = 2.45 m, b = 3.15 m, and c = 15.0 m and angle θ = 36.5° find x component of vector a

Math
Assume that each female rabbit of a colony gives birth to three female rabbits. How many female rabbits of the tenth generation will be descendants of a singal rabbit of the first generation?

Chemistry
Suppose the atmospheric pressure during the experiment was 751 mmHg. The temperature of the water was found to be 23.0 degrees celsius. What is the pressure of the oxygen gas, Po2 that is produced?

Math
round each number to the place of the underlined digit 165,023,912 the one is underline?

Chemistry
An automobile gasoline tank holds 20.0 gal when full. How many pounds of gasoline will it hold if the gasoline has a density of 0.560 g/mL?

Ss
In the late 1800s mant industrialists set up welfare institutions and organizations.to help the urban poor?

Finance Management
CASE STUDY 1 please read the continuing case at the end of Chapters 1 and 2 in your textbook. After studying the Chapter 1 case, respond to the following: 1.At which level do some of the basic functions (cost accounting, reporting tax, patient accounts and billing, accounts ...

intro chem
What is the mass of carbon dioxide produced if 1.95 g sodium carbonate is used?

social studies/ history
thank you

social studies/ history
Oh!!!! Ms.Sue, the question said "Explain the Iroquoise pollitical system".

social studies/ history
OK THANK YOU FOR ANSWERING QUESTION NUMBER 2 THOUGH

social studies/ history
the homework never said wether it was kinship.All it said was iroquois system.

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