# Posts by MAry

Total # Posts: 3,870

Calculus
Pyramid - A pyramid with a square base and four faces, each in the shape of an isosceles triangle, is made by cutting away four triangles from a square piece of cardboard and bending up the resulting triangles to form the walls of the pyramid. The diagonal of the square before...

Microeconomics
Discuss the ethics of using unconscious nudges to alter people's behavior. Within your answer, consider the argument made by economists Richard Thaler and Cass Sunstein, who favor the use of nudges. Could nudges be avoided? Do all policies contain some unconscious nudges ...

math
a time capsule is in the shape of a cylinder with a hemisphere at each end. if the capsule is surrounded with a metal outer layer 4 cm thick as shown( there's a picture) then determine the volume of the metal outer layer. round your answer to the nearest cubic centimeter. ...

S.S.
If anyone's confused the answers are BCCDC. I promise.

Chemistry
Can someone please tell me the heat of fusion for Lauric Acid, Oxalic Acid, and Cetyl Alcohol? I've looked and can't find them anywhere! Thanks!

Math
3x/5 - x/2

Math
Lyn is 7 years old. Rose is 2 years less than twice as old as Lyn. What is the sum of their age?

math
thank you :D it helped me understand

math
you put 390 instead of 290 for the perimeter why? it has me a bit confused.

math
i didn't see it before thank you for answering my question it helped :D

math
A rectangular field is 35 m longer than it is wide. The length of the fence around the perimeter of the field is 290 m. What are the dimensions (length and width) of the fence?

math
A rectangular field is 35 m longer than it is wide. The length of the fence around the perimeter of the field is 290 m. What are the dimensions (length and width) of the fence?

ap chem
What type of experiment can be done to determine if a material is paramagnetic?

ap chem
in a sigma antibonding orbital where are the electrons most likly to be found in relation to the nuclei in a bond?

ap chem
The allene molecule has the following Lewis structure: H2C=C=CH2. Are all four hydrogen atoms in the same plane? The allene molecule has the following Lewis structure: H2C=C=CH2. Are all four hydrogen atoms in the same plane? If not, what is the spatial relationship? Explain. ...

maths
is there easier way to do for 10 years

Math
The length of each side of an equilateral hexagon is a whole number, and the length of each side of an equilateral octagon is a whole number. Both have the same perimeter. The perimeter must be a multiple of 16 ,18, 24,30 or 36 ?

calc volume
find the volume of a solid formed when the region bounded by y = e^(x-3) and y = 1 + ln(x) is rotated about the y-axis.

math
x(x+2)= 35 x^2 + 2x - 35 = 0 (x - 5)(x - 7) = 0 x = 5, 7

math
There are two 100-foot poles. A 150-foot rope connects them at the top. The bottom of the rope hangs to 25 feet from the ground. How far apart are the poles?

math
jake jumped 3 feet. Marco jumped 5 feet. Peter jumped 4 feet. How much farther did Jake and Peter than MArco? Explain how you found your answer.

Math
Find the value of each expression using the pemdas method. 5(to the second power)+8 divided by 2

physics
Two particles A and B have velocities 3^i and v^j respectively (in m/s). (a) Find rBjA; the position of B relative to A for all t given that rBjA(t = 0) = 9^i + 6^j (in metres). (b) Find the value of v such that A and B collide. (c) If v = 1 m/s, nd the time and distance when ...

Junior in College

I don't understand how to do it, you don't need to be mean about it. I am asking for someone else's help.

An interstate highway has been built though a poor neighborhood in a city. In the afternoon, the sound level in a rented room is 114.0 dB as 172 cars pass outside the window every minute. (a) What is the sound intensity during the day ? (Reminder: If you choose to use ...

Two pipes of equal length are each open at one end. Each has a fundamental frequency of 715 Hz at 300 K. In one pipe the air temperature is increased to 313 K. If the two pipes are sounded together, what beat frequency results?

Biostats
What statistical method(s) a researcher can use to determine if the mean body mass index of the population is the same for three groups of subjects (group i=diet restriction; group 2=exercise; group 3=none).

Biostats
What statistical methods a researcher can use to determine if weights of the children in pounds are normally distributed or not?

Legal Issues in Health Sciences
You are the head of the health information management department at a hospital. An FBI agent has arrived at your office with a search warrant in hand. He asks to speak with you about the hospital's helth records. How should you respond?

history ASAP
1900's

history ASAP
why did the environmental movement prove to be so divisive? Whose interest were threatened?

A phone call cost \$3 minute Imput (x) rule output(y) 1 5 10 20

Math
can not be simplified any further unless you want 1 and 5/7

chemistry
Cisplatin, a drug used in the treatment of certain types of cancer has the molecular formula Pt(NH3)2Cl2. How many moles of compound are in 254.09 grams of the compound?

US Government
Using a graphic organizer describe the conditions of American citizenship

Part A: A cardinal (Richmondena cardinalis) of mass 4.50×10^−2 kg and a baseball of mass 0.142 kg have the same kinetic energy. What is the ratio of the cardinal's magnitude p(c) of momentum to the magnitude p(b) of the baseball's momentum? Part B: A man ...

A car is traveling at 10 m/s. By what factor does the car's kinetic energy increase if its speed is doubled to 20 m/s?

Phy
A 17kg child slides down a 2.7m -high playground slide. She starts from rest, and her speed at the bottom is 1.8 m/s. What is the change in the thermal energy of the slide and the seat of her pants?

probability
the one that says sum: and ways: that is what the book says!

probability
two fair six-sided dice are rolled and the sum of the dots on the top faces is recorded. a) complete the table, showing the number of ways each sum can occur sum: 1 2 3 4 5 6 7 8 9 10 11 12 ways:1 2 3 b)use the table to find the probability of the following events. A:the sum ...

math
yancey collects plastic banks. He has three different banks: a pig,a cow and a horse. How many ways can Yancey arrange his banks on a shelf?

Physics
Part A: A cardinal (Richmondena cardinalis) of mass 4.50×10^−2 kg and a baseball of mass 0.142 kg have the same kinetic energy. What is the ratio of the cardinal's magnitude p(c) of momentum to the magnitude p(b) of the baseball's momentum? Part B: A man ...

chemistry
Balance the following equations. Show all work. MnO4- + Zn -> Mn2+ + Zn2+

Statistic
In chi square goodness of fit test, if the expected frequencies, and the observed frequencies were quite different, we could conclude that: A) null hypothesis is false, and we would reject B) chi square distribution is invalid, and use t distribution instead C) alternate ...

physics
12. The ratio of the tensile (or compressive) strength to the density of a material is a measure of how strong the material is “pound for pound.” (a) Compare tendon (tensile strength 80.0 MPa, density 1100 kg/m3) with steel (tensile strength 0.50 GPa, density 7700 ...

STATISTICS
Scores on the LSAT are approximately normally distributed. In fact, published reports indicate that approximately 40 percent of all test takers score at or between 145 and 155, and about 70 percent score at or between 140 and 160. The full range of scores is 60 pts (120–...

chem
the max # of grams of K that can be obtained from 100.grams of KHCO3?

chemistry
At what temperature would you expect dinitrogen pentoxide to sublime? N2O5(s)-->N2O5(g) N2O5(s)= DELTA H -43.1 N2O5(s)= S (J*K1-*MOL1-)= 178.2 N2O5(g)= DELTA H 13.3 N2O5(g)= S (J*K1-*MOL1-)=355.7 where do i start here?

chemistry
Balance this chemical equation. Cr2O7 2-(aq) + Cu(s)---> Cr3+(aq) +Cu2+aq) I don't understand how to do this problem. Where do i begin? thank you.

define and analyze ways in which innovation at HCL Technologies will likely be influenced by trends shaping global markets.

Microsoft Infrastructure
You remember learning that remote RADIUS server groups offer some benefits to a network with multiple RADIUS servers. Research those benefits and decide if making changes to your network is necessary. Describe the findings of your research concerning the benefits of remote ...

Algebra
6/24 of 1/2 would be 3/12

history ASAP
in what sense did the us seem to be developing into two nations in the 1950 and 1960's . What was really happening ? Did it stop ? why?

math
how many lines can connect 3 coplanar points?

intermediate accounting
purchase of a machine for \$2000 was expensed. The machine has a four year life , no residual value , and straight line depreciation is used how to write journal entry?

intermediate accounting
goods in transit, purchased on credit and shipped FOB destination. \$10000 . were included in purchases but not in the ending inventory? how would you write this journal entry.( this company uses periodic inventory.

Math
A cubic centimeter is the same as 1 mL. If a humpback whale has more than 1 kL of blood, how many cubic centimeters of blood does the humpback have?

math
6*2

chemistry
what is the total pressure in a gas mixture of 100 mm hg O2, 820 mm hg N2, and 1.5 mm hg CO2?

chemistry
what is the total pressure in a gas mixture of 100 mm hg O2, 820 mm hg N2, and 1.5 mm hg CO2?

english
Is this sentence correct? A sheet lied on the rug to catch paint splatters.

I would like you to explain the implications of the article and apply some aspects of the article in a paragraph, like implicating imformation about the article.

Explain, in several paragraphs (no more than four), the implications of the Malcolm Gladwell article, "How David Beats Goliath." Apply some aspects of the article to your experience and future.

Chemistry
How many grams are in 50.0 mL 2.0 M of HCl? Please help me!!! I think the answer is 3.57g but I am not sure. Thank you :)

Windows Infrastructure
You need to download a large document (100 Mb) from your local network. This document contains the blueprints for a multi-million dollar invention and should not fall into the hands of competing companies. Which should you use to download this document: a dial-up connection or...

physics
an arrow was shot at a suspended clay target. the original KE the arrow was shot with was 2.0 J. the final KE from the arrow-target collision was 0.2 J. What happened to the original KE of the arrow? Give at least four possible ways in which this KE could have been lost. I ...

Physics B
A 89.2 kg ice skater, moving at 16.1 m/s, crashes into a stationary skater of equal mass. After the collision, the two skaters move as a unit at 8.05 m/s. Suppose the average force a skater can experience without breaking a bone is 4296 N. If the impact time is 0.096 s, what ...

Physics B
Part 1 Calculate the magnitude of the linear momentum for each of the following cases: A proton with mass 1.67×10 −27 kg moving with a speed of 5.24 × 10 6 m/s. Answer in units of kg · m/s Part 2 A 15.1 g bullet moving with a speed of 327 m/s. Answer ...

trig
(1 + sinx)(secx - tanx) = cos x

trig
tan^2x/1 + tan^2x = sin ^2 x

trig
cos^2 A/ 1+sin A

Precalculus
The question(s) are as follows: Given: f(x) = 3cos(3x+π) - 4 Find: a) the inverse of F(x) b) the domain and range of F(x) c) the domain and range of F -1(x) I got cos-1[(x-4)/9] - π = y for the inverse, although I'm not sure I did the problem right (I set x to y ...

algebra
The basic formula is rate x time = distance. Since the freight train and the passenger train are traveling the same distance, the rate x time for each train equals the other. Let t = the time for the freight train. Then t-2 would equal the time for the passenger train, since ...

Precalculus
The question(s) were as follows: Given: f(x) = 3cos(3x+π) - 4 (as you thought) Find: a) the inverse of F(x) b) the domain and range of F(x) c) the domain and range of F -1(x) I got cos-1[(x-4)/9] - π =y for the inverse, although I'm not sure I did the problem ...

Precalculus
How would I go about finding the domain and range of 3cos(3x+π) = 4? Thanks

social studies
The Demographic Transition Model

maths
find the whole number solutions to each of these inequalities. q1. 3<2x-1≤17 q2. 5≤g-3≤12 q3. 8<5c≤20

Sociology
This unit we learned about the various social statuses in the U.S. Identify and describe each status. How are they similar and how do they differ? Into which social status do you fit and why do you feel this way

Economics
The slope of the consumption function equals: A. 1-MPS B. 1/(1-MPS) C. 1-MPC D. MPC/MPS E. MPS

Economics
Consider the simple economy of Behr, whose government does not tax its citizens. The consumption function of Behr is given by: C=500+.8Y, where Y is income. the autonomous consumer spending in this economy is: A. \$1000 B. \$800 C. \$500 D. \$.80 E. \$1800

Algebra
What is the rule?? INPUT OUTPUT ______ 12 9 ______ ______ 6 ______ 16 7 _______

Physics B
Objects with masses of 105 kg and 528 kg are separated by 0.482 m. A 41.1 kg mass is placed midway between them. 0.482 m b b 105 kg 41.1 kg 528 kg Find the magnitude of the net gravitational force exerted by the two larger masses on the 41.1 kg mass. The value of the universal...

Science
A 52kg tricyle left a child's yard at 3m/52. What is its force ?

geography
omg thanks i needed help on that one too! still working on the other parts

stats
if you know the mean and standard deviation, how do you determine the proportion that will and will not be included

Physics B
part 1 A coordinate system (in meters) is constructed on the surface of a pool table, and three objects are placed on the coordinate system as follows: a 1.5 kg object at the origin, a 3.4 kg object at (0 m,1.8 m), and a 4.5 kg object at (4.2 m,0 m). THANK YOU!! Find the ...

Physics B
A coordinate system (in meters) is constructed on the surface of a pool table, and three objects are placed on the coordinate system as follows: a 1.5 kg object at the origin, a 3.4 kg object at (0 m,1.8 m), and a 4.5 kg object at (4.2 m,0 m). Find the resultant gravitational ...

Math
Jane is x years old today. Her brother Kenny is 4 years older. After seven years their total combined age will be 24 years. Write a linear equation for their total combined age after seven years. Fine James age today.

Math
There are 40 questions on a class test. Six points are given for each correct answer and three points are deducted for each wrong answer. Find the number of correct answers for a test score of 105.

chemistry
Calculate the grams of solute needed to prepare each of the following. 55.0 ml of a 6.50 hcl solution.

Physics B
An air puck of mass 0.289 kg is tied to a string and allowed to revolve in a circle of radius 0.51 m on a horizontal, frictionless table. The other end of the string passes through a hole in the center of the table and a mass of 0.98 kg is tied to it. The suspended mass ...

Physics
An air puck of mass 0.289 kg is tied to a string and allowed to revolve in a circle of radius 0.51 m on a horizontal, frictionless table. The other end of the string passes through a hole in the center of the table and a mass of 0.98 kg is tied to it. The suspended mass ...

2 is 43:51 4 is 15 packs for 3.95 10 is NO IDEA!!! Sorry for the last question but I hope I was a help on the first 2!!! :D Good luck on your Maths homework!! :D

college algebra
list the intercepts and test for symmetry. y=-8x/x^2=49

financial accounting
The lake theater opened on april 1.all facilities were completed on march 31. During april,the following events and transactions occured. Apr.2 paid film rental of \$800 on first movie. 3 ordered two additional films at \$1,000 each. 10 made \$2,000 payment on mortgage and \$1,000...

Physical Science
Sound travels about 1530 m/s in sea water. How many times faster does sound travel in sea water than in air? (The speed of sound in air at 25°C is about 345 m/s.)

chemistry
onic compounds have names that... (choose all that apply) might contain Roman numerals. might start with ammonium. start with the name of an anion. have prefixes, like di or penta. start with the name of a nonmetal.

chemistry
What is the chemical formula of the compound that forms between lithium (Li) and phosphorus (P)?

math
-2a+2=-14 -2a=-16 a=-16/-2 a=8