Total # Posts: 162

write and that is equivalent to each of the following expression,using the related acute angle a) sin 13pi/6 b) cos 11pi/8 c) tan 7pi/4

write and that is equivalent to each of the following expression,using the related acute angle a) sin 13pi/6 b) cos 11pi/8 c) tan 7pi/4

american history
its c

american history
not d

chemistry
please could you identify at least 2 limitations each for the coordinate bonding and metallic bonding theories?

Chemistry
Calculate the solubility of ZnCO3 in .050 M Zn(NO3)2. Ksp= 3.0*10^-8 solubility= 1.7*10^-4

algebra
grandpa has 9 grandchildren. the following ages are 1 15 9 12 18 9 5 14 7. which statement does the data support

Algerbra 1 substitution method
X=2 Y=-1 (2,-1)

statistics
Someone who has never seen a normal die before decides to estimate the mean value of all its faces (μ) by rolling it many times. First, they are told that the standard deviation is σ = 1.7. Then, they roll the die 50 times and get a sample mean of x-bar = 3.7. ...

Physics
17. A 60.-kilogram student climbs a ladder a vertical distance of 4.0 meters in 8.0 seconds. Approximately how much total work is done against gravity by the student during the climb?

Chemistry
Ok, so how then do I figure out the expected moles for N2 at the end of the equation. Is it that because of the 1:1 ratio that the .0073 mol of NaNO2 are the same for the N2 gas?

Chemistry
In the lab experiment (Ideal Gas Behaviour) we were told to calculate the Molar voume of N2 gas using the equation - vol N2 @STP/ mol N2 produced. The mol of N2 produced were found using the equation PV=nRT where P = Net pressure of N2 alone = 744.11 (tot pressure - vapour ...

Chemistry
In the Formula... Na+ + NO2- + HSO3NH2 -> HSO4- + H2O + N2 + Na+ which I know has a 1:1 ratio, How do I figure out the Moles of N2 gas expected. Molar volume = 24.627 L/mol Moles of N2 produced = .0067 mol Volume of N2 gas of STP = .165 L Original used .5062g of NaNO2 to ...

accounting
thank u so much

Algebra-HELP
Thank you!!

Algebra-HELP
well i know the x-intercept is (3,-2) but i can seem to understand y intercept. I thought it would be (0,0) but it was wrong

Algebra-HELP
Find the x and y intercepts of f(x)=x^2-x-6.

physics
h=100m t=200/9.8= 20.408 sec.

math
Reasoning DOES (4+5)+2=9+2?Explanin.

chemistry
the answer is 26.301 mL because 26.301 x 0.99704 = 26.223

geometry
144 beacuse 12 times 12 is 144 asholes

Guess and check a caterpillar has twice as many legs as a spider. Together,they have 24 legs.how many legs does the spider have.? How many legs does the caterpillar have?

physics
what is relationship between mass of rotating object and its period

Life orientation
Two institution/community that are involved in supporting or giving redress to teenage pregnancy

English
can someone overlook my answers to help with the questions that are wrong at let me know which ones are right. Bold = my answers I chose (right) Wind can create alterations in the surface layers of rock. Wind Is one cause of erosion. Which of these sentences combines the ...

Chemistry
What is the concentration of CrO22 4 in 0.0040 M Ba(NO3)2 saturated with BaCrO4. Including the activity coefficients in the expression? The ksp of BaCrO4 is 1.17 x10^-10 [CrO4 2-]= ? M I want to understand the problem not just the answer please.

French
Guillaume voyage avec ______ soeur et _______ parents. i have to use " SON , SA, OR SES " as appropriate.

MATH
IF THERE ARE 24 GIRLS IN THE CLASS HOW MANY BOYS ARE THERE IN THE CLASS Y=3/8X

Math
answer to travis has designed a rectangle with an area of 59 square units. his rectangle is the smallest rectangle with whole number side lengths. what are the length and width of the rectangle, explain your reasoning. what is the perimeter of the rectangle? explain your ...

Ap chemistry
Since its a phase change in part b you have to calculate the delta h vap so in order to do that convert the 10 grams to mols then convert that to kj. ( delta h vap for one mole of br2= 29.6 kj). So 10 g / 159.80 x 29.6 kj = 1.85 kj

Statistics
Marks: --/20 What percentage of the general US population have bachelor's degrees? The Statistical Abstract of the United States (120th edition), gives the percentage of bachelor's degrees by state. For convenience, the data are sorted in increasing order. 17, 18, 18, ...

chemistry
What is the concentration of a HNO3 solution if 10.0 mL of the solution is neutralized by 3.6 mL of a 0.20 M NaOH solution?

physics help
A uniform plank of length 5.1 m and weight 235 N rests horizontally on two supports, with 1.1 m of the plank hanging over the right support (see the drawing). To what distance x can a person who weighs 458 N walk on the overhanging part of the plank before it just begins to ...

math
can you write 4+4+3=11 in a multiplication sentence?explain.

math
can you write 4+4+3=11 in a multiplication sentence?

kelly collects dime quaters and nickels and pennies he took 40 cents from his collection he counted the coins and found out he had twice as many nickels as dimes what coins could kelly have?

Physics
A particle's initial velocity is −24.0 m/s. Its final velocity, 3.10 seconds later, is −14.0 m/s. What was its average acceleration?

geometry
G lies on the perpendicular bisector of segment AB, AG = x2 + 4x, and BG = x + 18. Find AG

math
The wheel on a child's bicycle is 48 cm in diameter. To test the strength of the tire, William lifts the back wheel 1 m from the ground and spins it at 36 turns/min. He attached a blue sticker to the bottom of the tire beforehand. Assuming that William spins the tire at a ...

help
What is the percentage of words in an english dictionary that have latin or greek as their source? A} 50% B} 60% C} 70% D} 80% .i choose a.

college algebra
please solve by method of substitution 0.3x-0.4y-0.33=0 0.1x + 0.2y -.21=0 please give all steps to solve.I think I understand the basic concept but this is little more complicated for me. Thanks in advance

Math
Im sorry but i do not see how to solve. I just figured out that it is 53 cappuccinos and 23 expressos, but i can not make an equation that shows how I got those two numbers.

Math
Suppose the central Park Coffee Shop sells a cup of expresso for 2.00 and a cup of cappuccino for 2.50. On Friday Destiny sold 30 more cups of cappuccino than expresso for a total of 178.50, worth of expresso and cappuccino. How many cups of each were sold? I am learion to ...

At what time is eh sum of the digits on a digital clocck the greatest? The answer is 12:59 right?

algebra II
How do you know if a quadratic equation will have one, two, or no solutions? How do you find a quadratic equation if you are only given the solution? Is it possible to have different quadratic equations with the same solution? Explain. Provide your classmate’s with one or...

Human resources
Analyze how emotional and physical aspects of a person’s life can influence the employee’s effectiveness in the work environment.

human resources
My chosen career is registered nursing for this one assignment. I need an idea of how to start this assignment.

human resources
Needs assessment: What types of issues might indicate a need for training? From what sources would these issues be identified? If you were a training manager, how would you prioritize training needs from these sources? a. A supervisor requests training on the specialized ...

AlgebraII

AlgebraII

can you help me in math? please

Math
On the first day of school everyone wants to shake hands. How many handshakes in all? Hint: There are 30 kids

Algebra 2
how do you graph the function? f(x)=2(x+2)^2(x+4)^2

explantaation
how do birds fly? do u know where to find diagrams of how birds fly? http://www.fi.edu/wright/again/wings.avkids.com/wings.avkids.com/Book/Animals/intermediate/birds-01.html

language arts
fly rocket

respiration/releasing energy
Does respiration release more energy from 1 gram of fat than from 2 grams of glucose?

I got this question marked wrong on a paper. Unfortunately, my prof didn't explain. _________________ subtances can pass through the plasma membrane. I put "nonpolar". What is wrong with this and does anyone know the correct solution/answer? Thanks all. http://...

tight junctions
prevent the contents of the intestine from mixing with bodily fluid on the other side of the epithelium? The statement you made could be true...I'm not exactly sure what you were trying to ask, though... sorry, was asking if tight junctions prevent the contents of the ...

question on microscope
"In order, list the lenses in the light path between a specimen viewed with the compound light microscope and its image on the retina of the eye." My son got this question and I cannot make sense of it. Growing up, we didn't have microscopes to use in school.

Math
How do you rename as a fraction and decimal 55 5/9% You should know that 5/9 is 5 repeating, so the decimal is 55.5%(with a bar over the decimal part). 5/9 is the fraction

economics
cattle rancher (A) owns a property next to an apple farm (B) cattle sometimes tent to roam into B's land and damage the trees. The rancher can choose the size of the herd. revenue form cattle is \$6 per head. The following schedle lists A's marginal prodction cost(MPC) ...

sociology
Thought I would add a little piece also. I too accidentally ran across this site and am taking the ETH125 class. It is now April 2009.. Good luck to you all!! Like many of you were; I also am a little confused at this point!! :-) Pretty funny we all ended up on this page! Ill ...

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