Posts by John
Total # Posts: 8,752

algebra 2
The mass of the particles that a river can transport is proportional to the sixth power of the speed of the river. A certain river normally flows at a speed of 3 miles per hour. What must its speed be in order to transport particles that are 200 times as massive as usual? ... 
math
definition of hypotenuse 
math
How many different right triangles are there with a hypotenuse of length 5 cm? 
math
How many different triangles with sides of measurements of 3, 4, and 5 are there? 
math
83/55 + 93/50 can you give me the actual answer 
math
definition for linear 
math
(3/4 divided by 3/100) divided by 3/2 x 1/2 + 7/6= 
math
83/55 + 93/50 
math
3/x=x/12 what is x 
math
if eight times a number is increased by three the result is 19 more than six times this number. find the number 
8th grade social studies
The Los Angeles Times Printed an article criticizing the way President Bush was dealing with the economy 
algebra
in a 3 digit number, the tens digit is twice the hundreds digit and 1/2 the units digit. if the digits are reversed, the new number is 49 more than 3 times that of the original number 
calculus
If an arrow is shot upward on Mars with a speed of 52 m/s, its height in meters t seconds later is given by y = 52t ? 1.86t2. (Round your answers to two decimal places.) What is the average speed over the given time intervals? (i) [1, 2] (ii) [1, 1.5] (iii) [1, 1.1] (iv) [1, 1... 
Biology
After a family picnic,Ella dumped the ice and rock salt from ice cream maker in the back yard.that area of yard now contains dead,brown grass. Explain why this happened using word plasmolysis in your explanation. 
AP Bio
Discuss how translocation/transpiration is an adaptation that allows flowering plants to overcome problems of life on land 
math
(4/3 x 4/3) x (3/2 x 3/2) divided by 2 2/5 = 
math
13/3 + 35/4 divided by 21/4 = 
math
how to find triangular numbers 
math
A collection of coins has a value of 64 cents. There are two more nickels than dimes and three times as many pennies as dimes. How many of each kind of coins are there? 
math
7+(x9/24)times40=480 what is x 
math
44(7695/x)=25 What is x. 
math
Write two mixed numbers so that all rules are applied: 1. One number is larger than the other by 4 2/3 2. The difference of the numbers is equal to the smaller number. 3. The sum of the numbers is natural number. What are the numbers? 
math
The sum of two consecutive numbers is n+1. What are the numbers? 
math
a three digit number has ten digit two greater than the units digit and the hundreds digit one greater than the tens digit. the sum of the tens and the hundreds is three times the units digit. what is the number 
math
Sheri's age in 20 years will be the same as Jerry's age right now. Ten years from now, Jerry's age will be twice Sheri's. What are their present ages? 
chemistry
*when you 
chemistry
What kinds of lab techniques could you cite in your conclusion with a molarity lab? When determine what molarity is correct. 
math (trigonometry)
d) With a d=100 we know that the distance the wheel travels C=pi(d) so c=3.14159(100m) c=approx 314m to go around the ferris wheel once. But you can go twice 314(2) in 10 min so... setting up a proportion distance/time = distance/time 618m/10min = x/6 min and solve for x 
Math
Thanks Arora! After more thought I believe all cases are covered in your eloquent solution : ) 
Math
Hmmmm.... can it really be that simple? WHat about the no copies of s, 1 copy of s, no copies of n, 1 copy of n? 
Math
"How many ways are there to arrange some, but not all, of the letters in "Suspension" if at most once copy of each letter can be used? I have a start... I think the part that says "at most" one copy means that you have to remove one of the "s"... 
Math
Looking at the question as a proportion would give shadow/object = shadow/obj then put in your numbers... 9feet/6feet = shadow/20 then multiply both sides by 20 to obtain what Damon said : ) 
HELP HELp
Hey, guys joke on you because I pass!!! hahahaha 
HELP HELp
You guys are no help if I fail is because of you guys!!! Also reporting all of you. 
precalc final?
I need help on the precalc final 
Science
In the system shown above m1 = 9.5kg and m2 = 2.6kg. If the coefficient of kinetic friction UK = 0.15 and the system is released from rest 
Math
google search the DESMOS website is a graphing website You can graph in radians or degrees : ) It is free : ) 
Chemistry(Photoelectric effect)
I've got this question wrong 2 times now... Which of the following statements about the photoelectric effect are correct? I. If electrons are being ejected, the number of electrons ejected increases with increasing light intensity. II. The minimum energy required for ... 
Math
Awesome! Now I truly understand the scenerio. Thanks so much for your wise and timely replies and solutions : ) 
Math
The "atleast 5 tosses" part means 1P(50rless tosses) so I think we also need the fifth toss that has 1 in 32 ways to get HT, that being TTTHT So that has to go into the subtracting bracket as well... I think : ) Please advise. 
Math
Or... do we not break up where the tree ended (as in my 1 solution), but do 1  7/32 which would then be 25/32 for the probability of it taking atleast 5 times for a head followed by a tail to occur? 
Math
When I made a tree diagram for 4 tosses of a coin... I had 6 branches where you tossed until a head was followed by a tail. That was 6 branches out of 16. Then I added another toss and came up with one more for the sample set. HHHHT, so that would be 1 out of 32 produce the ... 
Math
If you toss a fair coin and you toss until a head is followed by a tail. What is the probability that at least 5 tosses are needed for this to occur? 
math
YES :) and another way is to say... If 12 out of 180 have spots, then 18012 do not have spots. So out of 1200, we know the percent with no spots is 168/180 (written as a decimal), then 168/180 times 1200 is also 1120 : ) 
Alg 1 Further explanation PLEASE
Suppose f(x)=P(x). Determine the range of f (1,3), (4,1), (3,3), (2,4), (2,4), (3,5), (1,6) Algebra 1  Damon today at 10:12am Nothing can be negative. No y can be different from x Can you explain further please 
Algebra 1
Suppose f(x)=P(x). Determine the range of f (1,3), (4,1), (3,3), (2,4), (2,4), (3,5), (1,6) 
Algebra 1
Cassandra bought a car for 22,385. The value depreciates 14% a year. a. Write a function, d(x), that gives the value of the car after x years. b. What will the value of Cassandra's car be after 10 year 
English
This is all for the poem "To His Coy Mistress" They're all short answers. 1) What is the speaker trying to convince his mistress to do? 2) Why is she being "coy"? 3) Outline the author's argument in the form of a syllogism or a logical argument ... 
Financial analysis
I have 2 question. If current assets increased, then current liabilities also increase or decrease? And if current liabilities decreased, then current assets also increase or decrease? 
statistics / probability
A cooler full of sodas has 12 lemonlime drinks and 18 gingerales. If one drink is selected at random and then a second drink is selected at random, what are the chances that both sodas will be gingerales? 
math
Terry bought some gum and candy. The number of packages of chewing gum was one more than the number of mints. The number of mints was three times the number of candy bars. If gum was 6 cents a package, mints were 3 cents each, and candy bars were 10 cents each, how many of ... 
calculus1
Let f(x) = x^5 + 3x^2 ? 5x ? 7, find the interval(s) where f is increasing and decreasing. 
math
Terry bought some gum and candy. The number of packages of chewing gum was one more than the number of mints. The number of mints was three times the number of candy bars. If gum was 6 cents a package, mints were 3 cents each, and candy bars were 10 cents each, how many of ... 
math
Jennifer went to the post office for stamps. She bought the same number of 8 cents stamps and 10 cents stamps. She also bought as many 2 cents stamps as both of the other two combined. How many of each kind did she get if she paid a total of $4.40 for them all? 
calculus1
find the linear approximation to f(x)=1/square root of(x^3+1) at a=2 
calculus 1chemistry
The relationship between the rate of a certain chemical reaction and temperature under certain circumstances is given byR(T)=0.1(?0.05T^3+4T^2+120)grams/sec, where Ris the rate of reaction and Tis the temperature (in °C). a)Find thetemperature T at which the reaction rate... 
calculus1
who can show me step by step on how to differentiate f(x)= (x^21)/(x^21)^2. please do so. The answer must be f'(x)=(2x^3+6x)/(x^21)^3 or it is a wrong answer 
Alg II/Trig
Graph 2x^3 + 9x^2 + 4x  15 = 0 
stats
Kyd and North are playing a game. Kyd selects one card from a standard 52card deck. If Kyd selects a face card (Jack, Queen, or King), North pays him $6. If Kyd selects any other type of card, he pays North $2. A) What is Kyd's expected value for this game? Round your ... 
stats
You own 18 CDs. You want to randomly arrange 6 of them in a CD rack. What is the probability that the rack ends up in alphabetical order? 
stats
How many threeletter "words" can be made from 10 letters "FGHIJKLMNO" if repetition of letters not allowed 
stats
A boy owns 4 pairs of pants, 8 shirts, 2 ties, and 2 jackets. How many different outfits can he wear to school if he must wear one of each item? 
stats
A certain disease has an incidence rate of 0.7%. If the false negative rate is 7% and the false positive rate is 1%, compute the probability that a person who tests positive actually has the disease. 
Trig
A group of friends are going on a vacation together. They plan to rent a large house for $3000 and share the cost. They also estimate that the buying food for the week will cost $150 per person. Write a reciprocal function to calculate the cost per person for the trip (C), ... 
physics
What would be the final answer and what would be the value of Q 
physics
On planet Seeturn, the free fall acceleration is 9.800 N/kg but there is also a strong downward electric field that is uniform close to the planet's surface. A 2.00 kg ball having a charge of 5.00 micro C (5.00*106) is thrown upward at a speed of 20.1 m/s, and it hits the... 
science
Theres a wave when the marbles are drop 
computer healp
what is an os? i need help on an important exam for colegge 
stats
A die is rolled. Find the probability of the given event. (a) The number showing is a 6; (b)The number showing is an even number; The probability is; (c) The number showing is greater than 2; The probability is 
stata
29.25 
stata
A group of people were asked if they had run a red light in the last year. 148 responded "yes", and 358 responded "no". Find the probability that if a person is chosen at random, they have run a red light in the last year. 
Algebra 1
it will be 2.35 seconds when he hits 32 feet 
AP Biology
How does Hershey&Chase and Meselson&Stahl experiments explain DNA criteria: Can copy itself precisely Stable that it can be changed Complex enough to determine phenotype 
Physics
Using a graphical method of getting resultant vectors, find the resultant of the following vectors: 8N along the positive Xaxis and 6N making an angle of 45 degrees with the positive Xaxis and 10N 20 degrees below West. 
Physics
An astronaut, of total mass 85.0 kg including her suit, stands on a spherical satellite of mass 375 kg, both at rest relative to a nearby space station. She jumps at a speed of 2.56 m/s directly away from the satellite, as measured by an observer at the station. At what speed... 
Chemistry
For the reaction 2CO2(g) + 5H2(g)C2H2(g) + 4H2O(g) H° = 46.5 kJ and S° = 124.8 J/K The standard free energy change for the reaction of 1.75 moles of CO2(g) at 328 K, 1 atm would be ___ kJ This reaction is (reactant, product) ____ favored under standard conditions at ... 
Physics, please help
Copper has a breaking stress of about 3 × 10^8 N/m2. What is the maximum load that can be hung from a copper wire of diameter 0.5 mm? Answer in units of N. If 55% of this maximum load is hung from the copper wire, by what percentage of its length will it stretch? Answer ... 
Physics
Copper has a breaking stress of about 3 × 10^8 N/m2. What is the maximum load that can be hung from a copper wire of diameter 0.5 mm? Answer in units of N. If 55% of this maximum load is hung from the copper wire, by what percentage of its length will it stretch? Answer ... 
Maths
Lynn invites some friends for lunch. She needs to cater for 24 people. She decides to make pancakes. How much milk does Lynn need to use 
algebra
in a relationship between variables, what is the variable called that changes in response to another variable? a. function b. input function c. independent variable d. dependent variable 
Environmental Science
lol ms sue grow tf up 
Science
How long will it take a shell fired from a cliff at an initial velocity of 800m/s at an angle 30 degrees below the horizontal to reach the ground 150m below? 
calculus 1
Use Newton's method to find all solutions of the equation correct to six decimal places. (Enter your answers as a commaseparated list.) 6 cos(x) = x + 1 can somebody explain to me step by step on how to solve this problem? 
calculus1
If C(x) = 13000 + 500x ? 3.2x2 + 0.004x3 is the cost function and p(x) = 2900 ? 8x is the demand function, find the production level that will maximize profit. (Hint: If the profit is maximized, then the marginal revenue equals the marginal 
calculus 1
Find the limit. Use l'Hospital's Rule where appropriate. If there is a more elementary method, consider using it. lim x ? 0 (x?6x)/(6x ? 1) 
Georgia State History
i dont know them 
Georgia State History
Q14. Describe the fighting during the American Revolution in Georgia with the correct terms: The Battle of ______ ____________ ____________ started in 1776 when British soldiers arrived in ___________ to buy supplies. Governor __________________ took advantage of the arrival ... 
AP Chem
A lab manual states that to prepare a certain buffer requires mixing 25 ml of 0.200 M HClO (Ka=3.00 x 10^8) with 50 ml of 0.2 M NaClO What is the Ph of this buffer? 
Math
That is what I am not sure about. Can someone please help me? 
Math
In a group of 40 students, 22 study Economics, 25 study Law, and 3 study neither of these subjects. Determine the probability that a randomly chosen student studies: 1. Both Economics and Law 2. At Least one of these subjects 3. Economics given that he or she studies Law I ... 
Math
In a group of 40 students, 22 study Economics, 25 study Law, and 3 study neither of these subjects. Determine the probability that a randomly chosen student studies: 1. Both Economics and Law 2. At Least one of these subjects 3. Economics given that he or she studies Law I ... 
Math
In a group of 40 students, 22 study Economics, 25 study Law, and 3 study neither of these subjects. Determine the probability that a randomly chosen student studies: 1. Both Economics and Law 2. At Least one of these subjects 3. Economics given that he or she studies Law I ... 
Math
Given P(A) = m is the probability of event A occurring in any given trial: 1. State the range of possible values of m 2. Suppose two trials are performed independently. Find, in terms of m, the probability of A occurring: a) Exactly once b) At least once I am very confused of ... 
Trig
For which of the values of m do the graphs of functions y=x^2mx+4 and y=x^219x+9 not intersect? 
calculus1
Please help I want to post a picture but Jiskha doesn't allow me so I just describe what I see.the derivative tangent line curve start at (0,1/2). It curve downward pass the xaxis at (1,0)until it reach a local minimum at (2,1)then it curve upward until it reach a local ... 
math
write a two column proof. Given: RS=~ TS, V is the midpoint of RT Prove: /\RSV=~ /\TSV /\ is the triangle sign =~ is the congruent sign 
Math
Write the equation of the line that satisfies the given conditions. Express the final equation in standard form. Contains the point (8, 5) and is perpendicular to the line 2x ? y = 4 
calcxulus1
Find the critical points of the function. (Enter your answers as a commaseparated list.) g(x) = square root(81 ? x^2) 
calculus 1
Find the critical numbers of the function. (Enter your answers as a commaseparated list. If an answer does not exist, enter DNE.) f(x) = 4x3 + x2 + 4x 
Math, algebra
in a two by 3 grid, each lattice point is one unit from its nearest neighbours. a total of 14 isosceles triangles( but not right triangles), each with an area of 1\2 u2 have only two vertices that are one unit apart in the grid. how many such half unit triangles have at least ...