Sunday
March 29, 2015

Posts by Jim


Total # Posts: 1,474

math
The function f(x) = cx/2 x+3 satisfies f(f(x))=x for all real numbers x\= -3/2. Find c.
March 27, 2015

ALgebra
The function f(x) = cx/2x+3 satisfies f(f(x))=x for all real numbers x\= -3/2. Find c. (\= does not equal)
March 27, 2015

Physics
A 10kg suitcase is placed on a horizontal conveyor belt the top of which moves to the right. The coefficient of static friction between the belt and box is µs = 0.5 and that of kinetic friction is µk = 0.3. a) Sketch a free body diagram for the suitcase, showing ...
March 25, 2015

math
Trent wants to build a rectangular pen for his animals. One side of the pen will be against the barn; the other three sides will be enclosed with wire fencing. If Trent has 400 feet of fencing, what dimensions would maximize the area of the pen?
March 20, 2015

Physics
An F-18 with a weight of 22500 lbs lands on a carrier with a speed of 120 mph. If the run-out of the arresting cable is 160 ft, what is the planes acceleration in feet per second squared?
March 15, 2015

Geom
I have a 25cm wheel across how many rotations to go 100000 kilometers
March 14, 2015

Chem
In photography, unexposed silver bromide is removed from film by soaking the film in a solution of sodium thiosulfate, Na2S2O3. Silver ion forms a soluble complex with thiosulfate ion, S2O3^2-, that has the formula Ag(S2O3)2^3-, and formation of the complex causes the AgBr in ...
March 10, 2015

precalculas
write as a single logarithm 2IN plus In y munus In2y
March 9, 2015

precalculas
the population of preston is 89000 and is decreasing by 1.8% each year A:Write a function that models the population as a function of time t b predict when the population will be 50000
March 9, 2015

Physics
After a snowstorm a boy and girl decide to have a snowball fight. The girl uses a large slingshot to shoot snowballs at the boy. Assume that the girl fires each snowball at an angle 0 from the ground and that the snowball travel with an initial velocity of V0.. 1.in terms of ...
February 23, 2015

math
for what value of x (radicand) and n (index) can the expression "n root x " not be evaluated?
February 5, 2015

math help
thank for helping Steve.
January 31, 2015

math help
(x+5)^2 - (x-5)^2 is factored, it can be written as Ax where A is a whole number. The value of A is?
January 31, 2015

2nd grade math
Yes. You can take a four sided shape and have a line go through one corner to the opposite. that would be two triangles making up a four sided shape.
January 29, 2015

Geometry
How many different surface areas are possible when 8 one inch cubes are arranged so that each has one or more faces in common (touching) with at least one of the other cubes? We have to use a physical model. And I have no idea how to start this or even do it. Please be ...
January 25, 2015

Math
C as the square of 12 and 5 is equal to square of 13 , as per Pythagoras theorem , in a right angled triangle, the sum of the squares of the two sides forming the right angle is equal to the square of the hypotenuse
January 24, 2015

Maths
I think the miles they flew altogether will still be the same 1180
January 24, 2015

Maths
1180
January 24, 2015

Maths
If 15 swallows flew 380 miles south then had a rest,then flew 800 miles towards the coast. How many miles did each fly? How many miles they flew altogether?
January 24, 2015

Math
Stephen was taking photographs of 71 different locations. At each location Stephen too 24 different pictures. How many pictures did Stephen take total? Is this answer correct 71 X 24 = 1704?
January 21, 2015

math
In the following triangle, AB ⊥ CD and AC ⊥ BC CD is the bisector of triangle ABC If AD = 16m, and CD = 8m, find BD
January 12, 2015

Science And Technology Engineering Mathematics
Do you know some site where can I look for Science And Technology Engineering Mathematics books?
January 11, 2015

AP Chemistry
A mixture of 20.0 grams of CaO and BaO is placed in a 12.5 L vessel at 200oC with excess CO2 . The mixture is allowed to react to completion forming CaCO¬3 and BaCO3 .The pressure in the container after reaction is 220 torr. The solid carbonates are neutralized by adding ...
January 3, 2015

AP Chemistry
A mixture of 20.0 grams of CaO and BaO is placed in a 12.5 L vessel at 200oC with excess CO2 . The mixture is allowed to react to completion forming CaCO¬3 and BaCO3 .The pressure in the container after reaction is 220 torr. The solid carbonates are neutralized by adding ...
January 2, 2015

Algebra
Find amplitude period and phase shift for F(x)=-3cos(4x+n)+6
December 25, 2014

Chemistry
what are the intermolecular forces present in: 1. n-propyl alcohol 2. n-butanol 3. 2-butanol 4. tert-butanol alcohol 5. pentane 6. hexanes I know that the forces include- dipole-dipole, ion-dipole, dispersion, and hydrogen bonding...but I don't know how to pick which one ...
December 21, 2014

Physics
A ball is thrown upwards with an initial velocity of 16 m/s. What is the velocity of the ball 1.5 s later? After the ball leaves the hand of the thrower, what is the value of acceleration acting on the ball as it is rising upwards? 9.8x1.5 = 14.7. 16-14.7=1.3 m/s after 1.5s. ...
December 15, 2014

chemistry
What is the molality of 67.1g of Nano3 in 2.5l of water
December 11, 2014

chemistry
how wud u prepare 1L of a 1.30M aqueous solution of barium sulfide explain
December 11, 2014

chemistry
how much heat has been absorbed by 2500g of water when its temperature changes from 23c to 27c PLEASE EXPLAin
December 11, 2014

math
NVM i think i've done it. I simplified to -2(15+8J)/-289 correct if i'm wrong please!
December 8, 2014

math
Evaluate 2/(1+J4)^2 I got as far as: (1+j4)^2=(1+j4)(1+j4)=1+j4+j4+j4^2=1+J24 OR (1+j4)^2 (/2) =(0.25+j)(0.25+j)=0.0625+j+j+j^2 =0.0625+j+j-0.0625=J^2 I think it can be take further. but im not sure i'm right.
December 8, 2014

math
each person had $1.25 Because: There are four of them, therefore $1.25*4=5 They then each double the previous amount, so: 5*2*2*2*2=$80 or in reverse:80/2/2/2/2=5 5/4+1.25
December 8, 2014

6th grade math
the sum of twelve divided by twice a number
December 4, 2014

English 10th grade
"I'd done a car for one of her patients, who told her about me." Which of the following describes the part, "who told her about me." A. nominal clause B. adjectival clause C. infinitive D. gerund phrase Is the answer, B, the adjectival clause describing...
December 3, 2014

English 10th grade
"Well that's sculpture, making a '74 Toyota look like a '63 Corvette, only I didn't think of it that way...I was doing good work, and I was making good money." What is the purpose of the ellipsis (...)? I have it down to two possible answers: A. to ...
December 3, 2014

English 10th grade
"On windy days, you can hear its wings beating like a pair of brass cymbals." The part, "beating like a pair of brass cymbals" constitutes which of these? A. nominal clause B. adjectival clause C. gerund phrase D. participial phrase I chose D. participial ...
December 3, 2014

English 10th grade
Which of the following correctly describes this sentence? It looms menacingly over the road from the roof of a farmhouse, a flying reptile with a seven-foot wingspan. A. Simple B. Complex C. compound D. compound-complex I felt it was a simple sentence.
December 3, 2014

chemistry
A piece of an aluminum can was cut into small pieces. Then 0.422 g of the chips from the can was used to prepare potassium alum according to the procedure we used. Calculate the theoretical yield (in g) of potassium alum that could be obtained in the reaction. (Alum MW=474.41 ...
December 2, 2014

English
"who told her about me"
December 2, 2014

English
I’d done a car for one of her patients, who told her about me.” Which of the following describes the underlined words in this sentence? A. a nominal clause B. an adjectival clause C. an infinitive phrase D. a gerund phrase I chose B, the adjectival clause.
December 2, 2014

English
Oops, What is the purpose of the elipsis (...)
December 2, 2014

English
“Well that’s sculpture, making a ’74 Toyota look like a ’63 Corvette, only I didn’t think of it that way... I was doing good work, and I was making good money. A. to prepare the reader for a change in topic. B. to show Ramirez’s pride in ...
December 2, 2014

English
There are no pterodactyls in Ramirez’s front yard, but there are a mother dolphin, her baby, and two sheep. There’s a Don Quixote on his horse, aiming his lance at a windmill. There’s a space alien emerging from a flying saucer and an abstract baseball player ...
December 2, 2014

English
What does the part, "beating like a pair of brass cymbals" constitute? On windy days, you can hear its wings beating like a pair of brass cymbals. I think it is a participial phrase.
December 2, 2014

English
What type of sentence is this? (simple, complex, compound, compound-complex) 1. It looms menacingly over the road from the roof of a farmhouse, a lying reptile with a seven-foot wingspan. I think it is a simple sentence.
December 2, 2014

math
The second number is the square root of the first (sqrt169=13) therefore you just need to put sqrt144 into google or a calculator to get the answer, 12.
November 9, 2014

Physics
look in the related questions. theres about 1000questions the same or very similar to this.
November 8, 2014

SCIENCE
4:A 100cm to the m so 680*100=68000 5:A correct 6:A correct 7:D . both A and D are volumetric measures but litres are more appropiate on the scale of a barrel 8:A correct 9:D (i think) new information feelings are testable but not particularly useable as scientific data as ...
November 3, 2014

Business Statistics
idk
October 22, 2014

Physics Help Please!!!!
A man pushes a stalled car with a horizontal force of 312 N. The car does not move. What is the frictional drag force on the car? A water-skier (mass=60kg) is pulled by a boat with a horizontal force of 300N. The boat and the skier have a constant velocity. What is the ...
October 16, 2014

Physics Help Please!!!!
During a launch of the shuttle, fuel is being burned at a rate of 2000 kg every second. the exhaust from the burning of this fuel is expelled by the engines and can be seen during the launch. readings from instruments mounted on the space shuttle show that for the first 2 min ...
October 15, 2014

Physics
Two children are playing on two trampolines. The first child can jump one and a half times higher than the second child. The initial speed of the second child is 5 m/s. What is the maximum height of the second child? What is the initial speed of the first child? How long was ...
October 12, 2014

Math
According to the U.S. Census Bureau's most recent data on the marital status of the 242 million Americans aged 15 years and older, 124.2 million are currently married and 74.5 million have never been married. If one person from these 242 million persons is selected at ...
October 2, 2014

Math
jason mixed 3/8 cup of sugar with 1 5/6 cups of water. how many more cups of water than sugar did he use in his mixture?
September 24, 2014

chemistry
Would a substance with a density of 7.89 kg/dm^3 float on a substance that has a density of 14.2 g/ml?
September 23, 2014

Chemistry
A graduated cylinder contains 56.3ml of water. A metal cylinder is dropped in the water and is completely covered by water. The diameter of the cylinder is 3.8 cm and the height of the cylinder in 5.4cm. What is the volume reading in the graduated cylinder after the cylinder ...
September 22, 2014

Math
Alice, Bob, and Charlie are three siblings with ages a, b, and c respectively. Their combine age is 18 years. Charlie is older than Bob. Alice's age is equal to twice the difference between Bob's and Charlie's ages. Bob's age is equal the average of Alice's...
September 22, 2014

Chemistry
The men's marathon world record was in a time of 2hours, 4minutes, and 55 seconds. The standard distance is 26 miles 385 yard. At this pace, what is his speed in miles per hour?
September 21, 2014

trig
I have arrived at .322 as the sine of the angle how do I find the actual angle (in decimal/deg)
September 13, 2014

income tax
Kobe is a single dad with two dependent children, Lizzie, age 7 and Leslie, age 3. He has AGI of $51,000 and paid $6,300 to a qualified day care center. What amount of credit can Kobe receive for the child and dependent care credit?
June 29, 2014

physics
A 370kg piano slides 2.9m down a 24∘ incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. Ignore friction.
June 9, 2014

math
write a problem with lengths in feet using the numbers 29 and 56. write the answer to your problem.
May 29, 2014

math
Jane has a piece of wood that is 24 inches long. She uses 6 inches for one project and 9 inches for another project. How much wood does Jane have left?
May 29, 2014

math
Tyler and Mia join popcorn strings to make a string 84 centimeters. Tyler's popcorn strings is 36 centimeters long. How many is Mia's popcorn string?
May 29, 2014

math
Logan measures the height of his rose bushes. One rose bush is 35 centimeters tall. Another rose bush measures 39 centimeters tall. How tall are both rose bushes?
May 29, 2014

math
Tyler and Mia join popcorn strings to make 84 centimeters. Tyler's popcorn string is 36 centimeters long. How long is Mia's popcorn string?
May 29, 2014

math
Ryan watches 2 bullfrogs jump a total of 39 inches. One bullfrog jumps 22 inches. How far did the second bullfrog jump?
May 29, 2014

math
Anna has 16 inches of silver lace and 19 inches of gold lace. How much lace does Anna have?
May 29, 2014

Algebra 2
I still dont understand
May 29, 2014

Algebra 2
a farmer has 400 meters of fence with which to enclose a portion of land. the farmer wants to enclose a rectangular piece of ground that is as large as possible. the land is bordered by water on two sides. There are three options for the farmer Option 1) have two sides ...
May 29, 2014

math
Rona bought a length of rope. She cut off 1 meter of rope. Now she has 3 meters of rope. How much rope did Rona buy?
May 28, 2014

math
Len buys 24 centimeters of blue trim and some gold trim. She buys a total of 54 centimeters of trim. How much gold trim does Len buy?
May 28, 2014

math
Ray has a board that is 16 feet long. He cuts off 11 feet to make a shelf. What is the length of the board that is left?
May 28, 2014

Calculus
An inverted conical tank is 3m tall and 1m in diameter at its widest point. The water is being pumped out of a spout 2m above the top of the tank. Recall that the density of water is  = 1000kg/m^3 (a) Find the work needed to empty the tank if it is full. Include units. (b...
May 18, 2014

Ethics in Criminal Justice
Frankly, I don't think ANYTHING justifies convicting an innocent person; but, if I have to choose one, I would choose "B".
May 15, 2014

math
a parking lot charges $1.50 for the first hour of parking and 55 cents for each additional half hour how much would it cost to park a car from 12:45pm to 6:15 pm
May 13, 2014

7th grade math
Computer catalog has a computer monitor that is 19 inches. The 19 inches is the diagonal distance across the screen. If the screen is 10 inches in height, what is the width of the screen to the nearest inch?
May 8, 2014

Math
Two vans leave a parking lot at the exact same time. A few minutes later, car 1 is 8 miles due east of the parking lot and car 2 is 15 miles due south of the lot. How far a part are the two cars in miles?
May 8, 2014

math
$115
May 3, 2014

statistics (7)
a) I think the question requires the use of the t-distribution. standard error=statistic/sqrt(45) =65/sqrt(45)=9.689 critical value: df=45-1=44, area=.025 so t=2.015 margin of error=t*SE=19.52 b) Confidence interval: Use t-distr: sample mean +- margin of error =273 +- 19.52 =(...
April 26, 2014

Math (6)
The lines do intersect. sqrt(x) = x-2 x =(x-2)^2 =x^2-4x + 4 x^2-5x+4=0 (x-1)(x-4)=0 x=1,4 but 1 does not work if you plug in x=1 to both equations, so the only answer is x=4.
April 26, 2014

Chemistry
.708=(0.5)^(4.00/half life) Take log on both sides and rearrange equation to solve for half life. -.150=(4.00/half life)*-.301 (4.00/half life)=.498 half life = 8.03 min
April 26, 2014

Math
Tom made 2 pans of lasagna and cut each pan into twelfths. His family ate 1 1/12 pans of lasagna for dinner. How many pans of lasagna were left?
April 24, 2014

business
When creating a data set, historical costs should be:
April 9, 2014

Calculus Help
The County Roads Department is stockpiling salt for use next winter. The salt is being unloaded from railroad cars by a conveyor belt at a rate of 20 cubic feet per minute. The salt falls into a conical pile whose diameter at the base is four times the height of the pile. At ...
April 7, 2014

Calculus Help
find dy/d(theta) theta=2 , if y=sin(pi/(square root(theta^2+5))) Show steps thanks!!!
April 7, 2014

organic chemistry
For proton NMR spectra, does a peak at 0 ppm indicate anything significant or is it likely to be a signal arising from a solvent?
April 7, 2014

Calculus Help Please!!!
find the derivative of the function. Simplify where possible. F(theta)=arcsin(square root of (sin9(theta)))
March 20, 2014

Math
If there are 6 red tiles and 5 blue tiles in a box, what are the chances that you will pick a red tile without looking?
March 5, 2014

math
Anthony wishes to sell a $5,000 fixed-rate bond with a 3% coupon. The bond has two years left to maturity. What is the most money this bond could be worth?
March 3, 2014

algebra
Is the following inequality always,sometimes,never,true,2(8x-4)-2 x<14x+12 thank you
February 25, 2014

algebra
Is the following always,sometimes,never,true,6+8x-9=11x+14-3 x
February 25, 2014

algebra
Is the following inequality always,sometimes,never,true 2(8 x-4)-<14 x+12
February 25, 2014

algebra
Solve the compound inequality graph solution-2<2x-4<4 answers are 0<x<-2, 3<x<6, 1<x<4, 1<x<0
February 24, 2014

algebra
Solve the equation check for extraneous solution 6|6-4 x|=8 x+4answers are x=1, x=5/2.or x=2, x=5/2, x=5/2or x=1
February 24, 2014

algebra
A furniture maker uses the specification 19.88<w=20.12 for the width w in inches of a desk drawer write the specification as an absolute answers are 1w-0.24|<20.12, 1w-20|<0.12, 1w-20|<0.24, 1w-0.12|<20
February 24, 2014

math
lucy has a collection of buttons 2/3 of her buttons are square and 2/8 of her buttons are round. does lucy have more square buttons or round buttons?
February 20, 2014

math
on monday carlos ran 1/8 of a mile. on wednesday he ran 5/6 of a mile. carlos ran 3/8 of a mile on friday. which day did calos run the farthest?
February 20, 2014

Life.science
in the moss why the sporophyte is sometimes referred to as a semi parasite.
February 17, 2014

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