# Posts by anna

Total # Posts: 2,764

Maths
Let f(x)=x^2 -1 . How many distinct real roots are there to f(f(f(x)))

quiz
The vertices of a cube are labeled with the numbers 0,1,2,3,4,5,6 and 7, such that no two vertices are labeled with the same number. The sum of any 2 numbers on an edge is prime. What is the maximum sum of the 4 numbers on a face?

Math
What is the answer to the equation (0.3.)²-(0.2)²•(0.5)?

Trig
Use a half-angle identity to find the exact value for sec(x/2) if sinx = -12/13 ; 3pi/2 < x < 2pi

algebra
Determine whether the following is a polynomial. 937g2h3 - 238gh2 + 54gh

algebra
The following polynomial is prime. 2q² + 9q + 1

Consumer Math
499.33

PHYSICS - formula?
Here is one of my questions from my physics study. It tells me the answer (35 J), but how do I find that answer? I would appreciate a formula or step by step calculation. Thanks! :) A 30 kg kid on rollerskates is moving 1 m/s. His brother pushes him with a force of 5 N. What ...

Life orientation
1. Pollution - comes from factories, cars, etc. Think... try looking in your lesson or book and see if they gave examples of environmental hazards.

science
Those blue crystals are copper sulfate crystals with the formula CuSO4*5H20. It has

science
formula: CuSO4*5H20

economics
Yes, only you can answer. But just think, did you ever buy something because you saw it on tv? Or maybe you were on the computer and an ad popped up for a new video game that is coming out in stores soon. Maybe some new invention/product was featured in the newspaper. Do any ...

MATH
1/2 because on a benchmark the fractions are 0,1/2,1 and since half of 16 is 8 11 is much closer to 1/2 (8) then 1 (16/16)

Psychology
How do I find reliable sites for a research project, when I can't use journal articles published online, or personal websites?

Math
Find the area of a circular segment of a circle of radius 7cm that sub tends a central angle of 35 degrees?

CHEMISTRY
How do you get the concentration with buret readings? What would the concentration of HC2H3O2 (M) be? For example, Molarity of the NaOH solution: 0.2619 M Final buret reading: 31.10 ml Initial buret reading: 0 Volume of NaOH solution: 31.0 ml concentration of HC2H3O2 (M...

Maths
498

Maths
What is the highest power of 3 that divides 1000! (1000 factorial)

Cultural Anthrolpogy
Anthropological research has demonstrated that supernatural beings and forces exist in what percentage of the world's cultures? A. 50 percent B. 80 percent C. 95 percent D. 100 percent My answer: C

Cultural Anthropology
Ms Sue, are my answers correct pls? Thanks.

Cultural Anthropology
Sorry. That is a sodality member. Also: Supernatural connections to political leadership are most closely associated with: A. bands. B. tribes. C. chiefdoms. D. states. I chose C. 2/ It is often difficult to identify who the leader is in a foraging society because: A. you can...

Cultural Anthropology
Hello Ms Sue. How are you? I am actually reading now. However, I am more leaning to A. Is this correct? Thank you. Anna

Cultural Anthropology
In a band society, who would most likely be responsible for punishing a murderer

algebra
yes those are right

Math for Ms. Sue please! Last math questions!
Thanks. I got a 100% I am also Connexus.

english
hey everybody!I will make a presentation in the class few days later.Anyone watched The others(2001)?I got a question.Who is the woman in distress in the film and why is she in distress? thanks..

PHYSICS

PHYSICS
Hi! I have some questions from a study guide in my physics class, and they give me the answer, but I have to show how to get the answer. I did most of them, but need help with this. All I need is a formula, please. :)Thank you! Here it is: A skier with a mass of 60.0 kg pushes...

physics
At a fabrication plant, a hot metal forging has a mass of 74 kg and a specific heat capacity of 430 J/(kg·C°). To harden it, the forging is quenched by immersion in 710 kg of oil that has a temperature of 32°C and a specific heat capacity of 3000 J/(kg·C&...

Physics
At a fabrication plant, a hot metal forging has a mass of 74 kg and a specific heat capacity of 430 J/(kg·C°). To harden it, the forging is quenched by immersion in 710 kg of oil that has a temperature of 32°C and a specific heat capacity of 3000 J/(kg·C&...

Physics
A rod made from a particular alloy is heated from 22.0°C to the boiling point of water. Its length increases by 8.15 10-4m. The rod is then cooled from 22.0°C to the freezing point of water. By how much does the rod shrink?

Math
How many degrees,in total,does the minute hand turn in one day ?

Maths
A tyre manufacturer has chosen 48 tyres at random from a production line and issued them to taxis for testing. Assume that the 48 numbers you have selected refer to the number of thousands of kilometres travelled during the life of each tyre. (For example, a value of ‘32...

CHEMISTRY HELP!!
When BaCl2 reacts with Na3PO4, Ba3(PO4)2 and NaCl are formed. Balance the equation and write the coefficients in the blanks.

chemistry
61.54 g

Chemisty
Fluorine gas can react with ammonia gas to produce dinitrogen tetrafluoride gas and hydrogen fluoride gas. This reaction is described by the following balanced equation: 5 F2 (g) + 2 NH3 (g) N2F4 (g) + 6 HF (g) What mass of hydrogen fluoride gas is produced from 135 g of ...

Check my physics
Would you mind checking one of my problems from my physics study guide? I know the answer and just want to make sure I am using the right formula. :) A 78-kg skydiver has a speed of 62 m/s at an altitude of 870 m above the ground. a. Determine the kinetic energy possessed by ...

PHYSICS
Hi! I have some questions from a study guide in my physics class, and they give me the answer, but I have to show how to get the answer. I did most of them, but need help with these. Here is problem #8: A 20 kg block of ice slides without friction down a long hill. The start ...

PHYSICS
Hi! I have some questions from a study guide in my physics class, and they give me the answer, but I have to show how to get the answer. I did most of them, but need help with these. Here is problem #7: A 30 kg ball is launched at an angle of 15 degrees and is moving 20 m/s ...

PHYSICS
Hi! I have some questions from a study guide in my physics class, and they give me the answer, but I have to show how to get the answer. I did most of them, but need help with these. Here is problem #6: A 30 kg kid on rollerskates is moving 1 m/s. His brother pushes him with a...

PHYSICS
Hi! I have some questions from a study guide in my physics class, and they give me the answer, but I have to show how to get the answer. I did most of them, but need help with these. Here is problem #5: A roller coaster car starts at Point A at a height of 100 m. When it ...

PHYSICS
Hi! I have some questions from a study guide in my physics class, and they give me the answer, but I have to show how to get the answer. I did most of them, but need help with these. Here is problem #4: What is the increase in thermal energy to a 2000 kg bus and its ...

PHYSICS
Hi! I have some questions from a study guide in my physics class, and they give me the answer, but I have to show how to get the answer. I did most of them, but need help with these. Here is problem #3: A 30 kg kid on rollerskates is being pushed by his mom with a force of 10 ...

PHYSICS
Hi! I have some questions from a study guide in my physics class, and they give me the answer, but I have to show how to get the answer. I did most of them, but need help with these. Here is problem #2: Suppose the spring in a pinball machine has a spring contant of k=400 N/m...

PHYSICS
Hi! I have some questions from a study guide in my physics class, and they give me the answer, but I have to show how to get the answer. I did most of them, but need help with these. Here is problem #1: A skier with a mass of 60.0 kg is standing at the top of a snow covered ...

Um, the point of this website is not to give out ABCD answers. It's to help guide you. But we can't even help you do that since you posted so many answers. Sorry, can't help.

algebra
If the equation were x= 0.03x - 58.91, x would equal -60.7320.

algebra

Cultural Anthrolpogy
The field of computer technology could be used to illustrate that culture is

math
I think the answer is 105. Is that correct?

Physics
For launching a satellite into orbit around earth, would the proper conservation of energy formula be: Epi + Eki + O work = Epf + Ekf? Would work = 0 for launching a satellite? And, would Epi = -Gm1m2/radius of earth or would it just equal 0 (because we usually set Ep on earth...

Chem
Calculate the pH of a .50 M solution of NaCl.

algebra
The equation for this porblem is (x-25)-(y/11)=1

Physics
The electric field strength @ distance = 1.0 m from a point charge is 4.0 x 10^4 N/C. What is the Electric field strength @ 2.0 m from the same charge?

Physics
Thanks!

Physics
On the moon's surface, the force of gravity exerted by the moon on a camera is 2.4 N. What is the force of gravity exerted by the moon on the camera when it is in orbit with a radius = to twice the moon's radius?

Maths A
Select 48 values according to the following criteria. o The first thirty (30) numbers must lie in the range from 48 to 58 inclusive. o The next ten (10) numbers must lie in the range from 30 to 70 inclusive. o The remaining eight (8) numbers must lie in the range from 50 to 95...

Maths A
A tyre manufacturer has chosen 48 tyres at random from a production line and issued them to taxis for testing. Assume that the 48 numbers you have selected refer to the number of thousands of kilometres travelled during the life of each tyre. (For example, a value of ‘32...

math
90

maths a
The Bough and Bud Company combined an insect spray with a growth hormone to produce the MOP (More Oranges Production) Treatment, which was expected to increase the number of oranges produced by each tree. The data below shows the number of oranges produced by each tree in two ...

MATHS A
A tyre manufacturer has chosen 48 tyres at random from a production line and issued them to taxis for testing. Assume that the 48 numbers you have selected refer to the number of thousands of kilometres travelled during the life of each tyre. (For example, a value of ‘32...

Maths A
For this question, use the copy of the Random Number table provided at the end of this AAT. (This table was copied from page 111 in the Textbook.) Select 48 values according to the following criteria. o The first thirty (30) numbers must lie in the range from 48 to 58 ...

Maths
For this question, use the copy of the Random Number table provided at the end of this AAT. (This table was copied from page 111 in the Textbook.) Select 48 values according to the following criteria. o The first thirty (30) numbers must lie in the range from 48 to 58 ...

Math f(x)
given f(x)= x^2+x and g(x)=2x+1 determine f[g(x)] i don't even know where to start with this question help is much needed

chemistry
A factory that specializes in the refinement of transition metals such as titanium was on fire. Provide kinetic-based arguments (concentration and temperature) explaining why water would be dangerous for the firefighters.

Chemistry
The formula for rust can be represented by Fe2O3. How many moles of Fe are present in 21.3g of the compound? Please help. I am SO confused on all of this!!

Math/Accounts
Estimate the cost of ending inventory based on the retail method using the following information: Cost Retail Beginning Inventory \$ 600,000 \$ 800,000 Purchases \$ 450,000 \$ 600,000 Net Sales \$1,000,000 A. \$150,000 B. \$262,500 C. \$300,000 D. \$750,000

Mahalyk's Water Fun Shoppe specializes in jet skis. Mahalyk's inventory records showed the following for the past year. Purchase Date Number of Jet Skis Cost Per Jet Ski February 10 30 \$4,000 May 12 80 \$3,000 June 15 20 \$3,500 July 20 15 \$2,500 Use the FIFO method to ...

A firm has the following inventory information for the first quarter: 01/01 Beginning Inventory 50 units @ \$5 01/15 Purchases 80 units @ \$5.50 02/15 Purchases 60 units @ \$5.25 02/15 Purchases 40 units @ \$5.75 Sales 170 units @ \$10 Total operating expenses \$500 What is ending ...

Math
How many distinct numbers greater and equal to 100 and smaller than 3000 can be formed using digits 0,1,2,3,4, without repetition of digits?

chemistry
12.50g of an unknown compound (i=2) are dissolved in 50.00g of water and this solution freezes at –7.5 degrees C. What is the molar mass of this compound?

Chemistry
its concentration, so it should be mol/L

Chemistry
True, however, I keep getting a negative value which is not possible.

Chemistry
Find the initial concentration of NO2 if the concentration after 2.00 min is 0.113. k = 0.331 1/(M * s) 2 NO2 (g) + N2 (g) --> 2 N2O (g) + O2 (g)

Psychology
Dr. Gillian explained that research has identified over 25,000 genes which are responsible for the genetic information which progresses from generation to generation. These genes are:

Organic chemistry
We conducted a diels-Alder reaction of cyclopentadiene with Maleic Anhydride experiment. Though I was wondering why we added ligroin to the maleic anhydride and ethyl acetate. I know ligroin can be used as a solvent, but I thought that ethyl acetate was the solvent in this ...

Physics
138.056

Chemistry
If it had gone down then how would we calculate it

Chemistry
Freezing point of pure water = -2, Freezing point of Unknown solution = -1 Mass of unknown in 50g of water = 1.9964g. Calculate the delta T for the solution of the unknown solid and determine the molecular weight of the unknown solid.

English
Where reading the poem "LEGAL ALIEN" by Pat Mora . We have to find the rhythm,meter, and assonance . I cant fimd any of that in the poem . Please tell me what each one of them are in the poem .. Reply ASAP please

English
Help in escaping north where Harriet will be free

math
That doesn’t make sense!!!

general chemistry
A reaction involves fictional reagents A & B is begun with the inital concentration of 0.05M A and 0.01M B. The reaction reaches completion in 16 seconds. What is the initial rate of the reaction in respect to A? and what is the order in respect to B

Math
The expression ax^3+2x^2+cx+1 is 5x^3-3 greater than 3x^3+bx^2+d-7x. Find a, b, c, and d.

Chemistry
An aqueous KNO3 solution is made using 73.4g of KNO3 diluted to a total solution volume of 1.86 L. Calculate the molarity of the solution. (Assume a density of 1.05 g/ml for the solution.)

elementary math
thank you..

elementary math
i did use my poof to prove. im not sure im doing right. here is exercises: 'Suppose a,b,c are integers if a|b and a|c, then a|(b+c).' my answer: Proof. Suppose a|b ans a|c. By Definition of divisibility. we know a|b means there is an integer x with b= ax. Likewise, a|c...

Precalculus
How do you solve this problem: sin(90* - x) ----------------- cot^2(90* - x) + 1 The * is a degree symbol!! I haven't seen any problems with degrees in it, usually it's only a variable! If anyone could give me guidelines or show me where to start, I'd really ...

physics
Calculate the speed of a proton having a kinetic energy of 1.00 × 10 −19 J and a mass of 1.673 × 10 −27 kg. Answer in units of m/s

Spanish
Les vas a dar muchos regalos a tus padres. Quiero comprarles unos guantes a mis sobrinos Clara va a venderle sus libros de literatura francesa a su amiga. Los clientes nos pueden pagar con tarjeta de crédito

Algebra
A box with a lid is to be cut out of a 12 inch by 24 inch sheet of thin cardboard by cutting out six x-inch squares and folding them. What are the dimensions to two decimal places of all possible boxes that will have a volume of 100 cubic inches?

Geometry
A triangular entraceway has walls with corner angles of 50, 70, 60. The designer wants to place a tall bronze sculpture on a round pedestal in a central location equidistant from the three walls. How can the designer find where to place the sculpture?

math
I have a board 18" x 18" x 1/8" I need to support it in an upright position at a 15 degree angle. How big must the base of support be to keep it from falling over.

geometry
The coordinates for a rhombus are given as (2a, 0), (0, 2b), (–2a, 0), and (0, –2b). Write a plan to prove that the midpoints of the sides of a rhombus determine a rectangle using coordinate geometry. Be sure to include the formulas.

Science