Posts by Em
Total # Posts: 291

Physics
A tennis ball of mass 58g is thrown 5m into the air before served. Calculate the velocity of the tennis ball just before it is hit with the tennis racket. 
HIM occupany percentage
I did not understand where the 15, and 16 in the calculation came from 
HIM occupany percentage
A total of 76,006 IP service days of care were given at University Hospital during this year. The bed counts changed from a count of 200 at the beginning of the year to 220 on March 15, and then to 230 on July 1. The count was reduced to 210 on November 15 and it remained at ... 
HIM math
A total of 76,006 IP service days of care were given at University Hospital during this year. The bed counts changed from a count of 200 at the beginning of the year to 220 on March 15, and then to 230 on July 1. The count was reduced to 210 on November 15 and it remained at ... 
History
spain 
physics
Chuck Wagon travel with a constant velocity of 0.98 miles/minute for 9.3 minutes. Chuck then decelerates at 0.11 miles/min/min for 1.8 minutes. Determine the total distance traveled by Chuck Wagon (in miles). 
History
Try to be less hostile, Sue. Jeez. 
English
The importance of being earnest play please help me 20. Briefly explain two ways the play is either reflective of the Victorian culture or shows the influence of Restoration comedy. Respond in complete sentences. 21. Identify and explain how symbolism is used in the play. ... 
Econ
If the rate of inflation is 4% per year, how long will it take for prices to double? 
math
the flight path of a firework is modelled by the function h(t)=5(t5)^2+127 
history
need answers fast!!!!!!What impact did norbert Rilliexus invention have on sugar industries? 
American Government
There is another similar version of the test. 1. B. government corporations 2, 3, and 4 are the same as above. 5. C. Preside over the senate 6 & 7 are the same as above. 8. D. International Cooperation and the rest are the same as above 
American Government
B 
Math
The perimeter is 67.5 inches. If the first side is 15inches than the second side is 15+7.5= 22.5 because if you use a tape diagram the answer in each section is 7.5. Then that means your side 2 is 22.5 inches, then you do 22.5+7.5=30. Then just add them all together. You get a... 
Math
Write a divison equation that has a solution of 20 
US Govt
It also comes up as D sometimes. But it is still whether a person born outside of the US is a "natural born citizen" 
Physics trajectory
A ball rolls off a deck at a speed of 0.7 m/s. The deck is 4.5m above the street. How long does it take for the ball to reach the street? 
Math
Let n be any counting number. Using the two questions above as a guide, how many subsets does the set {1,2,3,...,n−1,n} have? Prove it as well. First question:Including itself, how many subsets does the set {1, 2, 3} have? List them. Second Question: Including itself, ... 
Math
in a survey, 15 people said they played basketball, hockey and volleyball. in addition 20 people said they played basketball and hockey. draw a venn diagram to determine how many people in the survey said they played only basketball and hockey. 
Physics
If it takes 5 seconds for the baseball to fall, how far from the tower will it land? I used vertical distance formula dy=1/2(g)t^2 and got 122.5 but its one of the answers in the multiple choice. Please help. 
Pre alg
Simplify: 3x^2+62x+5x4x^2+9 A.x^2+3x+15 B.7x^2+3x+3 C.x^23x+15 D.x^2+7x+15 I think it's D. 
precalculus
Rewrite the following expression as an algebraic function of x sin(arccos(x/2)) I know sine is y, which is opposite over hypotenuse. I also know that arccos is the inverse of cosine. I'm confused on what the question is asking and what to do with the x. Please help! Thanks 
Geometry
i have no idea 
Physics
A block of mass 0.585 kg is placed on the end of a spring which has a stiffness of 294 N/m. It is pulled down 2.80 cm and released. What is the frequency of oscillation? 
Physics
A block with a mass of 0.357 kg is attached to a spring of spring constant 599 N/m. It is sitting at equilibrium. You then pull the block down 4.80 cm from equilibrium and let go. What is the amplitude of the oscillation? I know A=D/F... I keep getting the wrong answer though... 
Chemistry
At a certain temperature, the reaction has Kc = 5 x 108. If a reaction mixture at equilibrium contains 0.26 M of H2 and 0.087 M of Cl2, what is the concentration of HCl? 
Physics
Suppose under the certain conditions, the maximum force of friction that could act on a certain car was 3.35*10^3 N. The mass of the car is 857kg. What is the maximum possible centripetal acceleration of the car going around a bend? I know the equation for this is a=(4piR)/(T^... 
Physics
A car is traveling around a bend at a speed of 12.4 m/s. The bend has a radius of curvature of 66.7 m. Friction is the only force acting towards the center of the circle. If the mass of the car is 862 kg, what is the force of friction required to make the car go around the bend? 
Physics
A ball is attached to a center post by a string that is 0.382 m long. The ball is moving in a circle on a frictionless table top at a speed of 1.28 m/s with a radius of 0.382 m. What is the centripetal acceleration of the ball? 
Physics
If the angular velocity, ω, changes from 7.07 rad/s to 24.2 rad/s over a time of 6.42 s, what is the angular acceleration, α? 
Physics
If a wheel turns around 6.00 complete rotations, what would the angular displacement of that wheel be in radians? 
Physics
Suppose a 300–g kookaburra (a large kingfisher bird) picks up a 84.0–g snake and raises it 2.30 m from the ground to a branch. How much work did the bird do on the snake? How much work did it do to raise its own center of mass to the branch? I got the first question ... 
Physics
Suppose a 300–g kookaburra (a large kingfisher bird) picks up a 84.0–g snake and raises it 2.30 m from the ground to a branch. How much work did the bird do on the snake? How much work did it do to raise its own center of mass to the branch? 
CALC HELP!
Find an equation of the tangent line to the graph of y= x+ (4/x) at the point (4,5). I can't figure out the answer to this. It's supposed to be y=3/4x +2 but I can't get that. 
Science
So it's D? 
Science
1. Which of the following explains why sunlight is important to the aquatic ecosystems? A. Sunlight provides a source of heat and energy to increase water temperatures. B. Sunlight keeps harmful bacteria from taking over aquatic ecosystems. C. Sunlight makes it possible for ... 
CHEM QUESTION
In writing and balancing equations using sulfur chemists usually use the empirical formula, S, rather than the molecular formula. Why? I'm not sure how to answer this question. 
Math!
I'm sorry I don't really understand... :( 
Math!
Describe how you would estimate the square root of a number that is not a perfect square without using a calculator. Can someone please explain? I need some help. 
U.S. History
At least someone helped.. Thanks, Brighton. Everyone else was no bloody help. 
Math
If city AN city BR 175 miles apart on a map the distance between the two towns is 2.5 inches what is the scale of the map 
CHEM HELP PLEASE
would it be 1.05E^8? 
CHEM HELP PLEASE
I did a lab where I had to determine avogadro's number. I need to find the uncertainty in number of moles of stearic acid. There were 3 trials and these are the values for the # of moles of stearic acid used for each trial: 4.39E^7 4.60E^7 4.50E^7 I just need help ... 
Math
lease help idk this answer 
Calculus
Does anyone know how to solve, ln((3x2)/(x1))<0 
Calculus
Could someone help with this limit problem? lim x>1 of ((sqrt(6x))2)/((sqrt(10x)3)) I tried to rationalize the denominator and numerator but it didn't work! 
Calculus
Could someone help with this limit problem? lim x>1 of ((sqrt(6x))2)/((sqrt(10x)3)) I tried to rationalize the denominator and numerator but it didn't work! 
math
A picture is 42 cm by 36 cm. A scale diagram of the picture must fit in a space that is 3 m by 2 m. Write a reasonable scale for the scale diagram. 
calculus
Find a cubic polynomial such as f(x)=ax^3+bx^2+cx+d that has horizontal tangents at the points (5,4) and (4,4) 
adv functions urgent
any math teachers around? 
Math simple polynomials
For 13 it's 1 and 14 a 1/27 
Math
Find the area of a triangle on a spherical surface that has a radius of 3cm and angles that measure 75degrees, 160 degrees, and 142 degrees. 
Math
Find the length of the side of a right triangle side a is 40 mm the opposite is 41 mm 
Math
How much glas is needed to make a fish tank that is 12 inches long, 8 inches wide, and 9 inches high? The tank is open on top. 
Math
If 2.7m of ribbon costs $4.99 how much does 0.82m of ribbon cost? 
Chem
Pure gold adopts a facecentered cubic crystal structure. It also has a density of 19.30g/mL. What is the edge length of gold's unit cell? What is the atomic radius of gold? I understand how to do this problem the other way: when you have the unit cell and are looking for ... 
math ans check
two points on the graph of a linear function are (3,5) and (1,4). Determine the equation of the function in sloppoint form. ans: m=1/2 I pick a point (1,4) yy1=m(xx1) y4=1/2(x(1)) y4=1/2(x+1) Thank you ^^ 
chem
Calculate glucose levels using standard curve when you have absorbence for sample 
biochem
How would I calculate blood glucose levels if using standard curve ...and I have three samples and their absorbence at 420 nm. 
Math check my answer
50 
Math check my answer
50 years 
Physical Science
Answer anyone? 
Chemistry honors
idk. lol from 4 years ago 
Math
Bud and frank were playing a game together and together they scored 56 points. Buds score was 8 times higher than franks what are their scores 
Math
Thanks so much! 
Math
Heidi has 40 flower arrangemts. Rose arrangements are 4 times as many as tulips how many of each do I have 
Physics
Your friend Josh tells you that he spends less on gas in the winter than in the summer. He also says that he has to fill up his tank less often in the winter. (a) Which of the following are possible hypotheses that can be formed from Josh’s observations? (You can choose ... 
math
The answer that I got was 22 because 8+10=18 and 18+22= 40 
Chemistry  Electroplating  URGENT
Sorry that should say 1115433.526 coulombs, not 8346.453. 
Chemistry  Electroplating  URGENT
Ahh thank you  so then there would be 8346.453 coulombs needed instead of 2225.721. As there are two unknowns, I cannot solve this problem any further... this is for an assignment due tomorrow, what should I do? 
Chemistry  Electroplating  URGENT
"To save on production costs, most automobile bumpers are never coated with more than 200 g of chromium. Determine how much time a standard bumper should be immersed in a chromium vat." This is what I have so far 96,485 coulombs are required to plate 1 Cr; 52/6 = 8.... 
math
there are 30 marbles in a bag; 4 blue, 10 red,6 white, 10 yellow. You randomly draw5 marbles without replacement. Find the percent of drawing 2 red marbles and at least 2 white marbles. 
English
What is wrong with Ms. Sue? Holy crap. She is NOT helpful. 
English
What are some good insight questions for A Separate Peace? Some topics can include: Wroter's craft Setting POV 
algebra 2
x^2  3x + 5 = 0. solve using quadratic formula. show solution 
GPA
Currently, my GPA is a 3.5 and I'm a freshman, I'm currently taking two honors classes. Do you think I'll be able to raise it up to a 4.0 by senior year? 
algebra 1
The graph models the situation because when you plug in 40 for x, you get y=14, which is a point on the graph. When you substitute 40 in for x, y=10, which is also plotted on the graph. 
economics
Suppose the demand curve for a monopolist is QD = 500 − P, and the marginal revenue function is MR = 500 − 2Q. The monopolist has a constant marginal and average total cost of $50 per unit. a.Find the monopolist’s profitmaximizing output and price. ... 
physics
Your town is installing a fountain in the main square. If the water is to rise 20 m above the fountain, how much pressure must the water have as it moves slowly toward the nozzle that sprays it up into the air? Assume atmospheric pressure equal to 100,000 Pa. 
physics
If you fill a container with air at room temperature (400 K), seal the container, and then heat the container to 500 K, what will the pressure be inside the container? Assume atmospheric pressure equal to 100,000 Pa. 
Chemistry
A gas is confined to a cylinder under constant atmospheric pressure, as illustrated in the following figure. When the gas undergoes a particular chemical reaction, it absorbs 827 J of heat from its surroundings and has 0.62 kJ of P−V work done on it by its surroundings. 
chemistry
What volume of 0.140 M HCl is needed to neutralize 2.53g of Mg(OH)_2 
biology
I need to know how egg whites would react when tested in iodine and Benedict's solution. 
Government
Looking for an issue and a solution where the people and the government can help 
Math
40% of what is 32? 
Math
laura can paint a house in 4 hours and lucky can paint a house in 2 hours. How long would it take for Laura and Lucky to paint a house together? 
Organic Chemistry
How do I make an IR Spectrum of C6H12S2 (Allyl Propyl Disulfide) 
Grammar
Hi beautiful people! Quick question if you are writing a congratulatory letter should you say  I would like to take the time to congratulate you on your extraordinary commitment to XXX charity. OR  I would like to tak ethe time to congratulate you for your extraordinary ... 
math
so I am wrong, thank you for explaining which it can not be. Thanks 
math
Which of the following is a formula for finding the volume of a cube? A. v=e^3, where e= the edge length B. v=(lwh)^3, wherel= length,w=width andh=height C.v=6e^2, where e=the edge length D. v=b*b, where b= the area of the base I picked A since V=s^3 or e^3 for the volume of a... 
mathslinear equation
(4,3),(1,6) 
Calculus
With is the integral of (9(sinx+cosx))/sin(2x) 
english
what would a thesis statement be for Old Jules by Mari Sandoz 
English I
Can someone please help me with this analogy? Joints:inflamed::_______atrophy. It is a crossword and there are 7 spaces. Thanks! 
Chem
when 2.31 moles of sulfur hexafluoride are synthesized from te elements, how many grams of fluorine were used PLEASEEEEE HELPPPP MEEE! 
Math
Given that f(x) = 2x^2  8x + 9, 0 ≤ x ≤ 3. (a) Find the average value of f. (b) Find c such that f(average) = f(c). 
Math
Find the volume generated if the region bounded by y = sin 2x and y = cos x, π/6 ≤ x ≤ π/2 is revolved about the line y = 2. Use the method of washers. 
Math
Find the volume generated. The region is bounded by y = 4xx^2 and y = 8x2x^2, and is rotated about x = 2. State which method (washer, disk, cylindrical shell) is used 
math
Find the area of the region between the curves y = sin x and y = x^2  x, 0 ≤ x ≤ 2. 
prealgebra
You split $1500 between two savings accounts. Account A pays annual 5% interest and Account B pays 4% annual interest. After one year,you have earned a total of $69.50 in interest. How much money did you invest in each account?