# Posts by John

Total # Posts: 8,394

science
im confused are these answers incorrect ?

math
6.85 ?

math
Suppose f(t) is the weight (in grams) of a solid sitting in a beaker of water and the solid is dissolving at a rate (in grams/minute) of f'(t)=-4 f(t)(3 + f(t) ). If there is 4 grams of solid at time t=2 minutes, use a linear approximation to estimate the solid's ...

math
Suppose f(t) is the weight (in grams) of a solid sitting in a beaker of water and the solid is dissolving at a rate (in grams/minute) of f'(t) =-4 f(t)(3 + f(t) ). If there is 4 grams of solid at time t=2 minutes, use a linear approximation to estimate the solid's ...

math
Suppose N(t) denotes a population size at time t where the dN/dt=0.03 N(t). If the population size at time t=4 is equal to 100, use a linear approximation to estimate the size of the population at time t=4.1.

math
A cup of coffee at 173 degrees is poured into a mug and left in a room at 72 degrees. After 6 minutes, the coffee is 137 degrees. Assuming that Newton's Law of Cooling applies: After how many minutes will the coffee be 100 degrees?

math
Suppose f(x)=ln x. (a) Find the linear approximation of f at a=1. L(x)= (b) Use the linear approximation to estimate ln 1.27. ln1.27=

Chemistry
Do positive ions or the negative ions cause the change in flame color ? Explain why and give on example.

Gudnite!

Dinner Together : Sitting by the barbecue waiting for sausages and hot dogs blue-gray smoke the same color of the sky I see a tiny spider walking down from the sky with tiny six footed steps down down in a perfectly straight line all the way down to the floor then back up the ...

On page 241 Focus on Poetry Animals Dinner Together: sitting by the barbecue waiting for sausages and hot dogs blue-gray smoke the same color of the sky I see a tiny spider walking down the sky with tiny six footed steps down down in a perfectly straight line all the way down ...

Poetry animals dinner together. What is all about? Page 241

math
john has 24 baseball cards. chard has 13 more cards than john. draw a comparison problem to illustrate how to solve the problem, then slove

Math
3x+3(x-1)<-18

Marh
The nearest sq mile would be a whole number, so round to the nearest whole number. (the place for the decimal). I am assuming the value you stated is in square miles.

Math
When the problem says "about" it sounds like they are looking for an estimate. A good estimate would be to multiply 6 times 700 to get 4200.

Counting and Probability
Any 2-digit number with a 1 is special (and all special numbers have at least one 1). There are nine 2-digit numbers with ones digit 1, and, there are nine additional 2-digit numbers with tens digit 1 (except from 11, which we've already counted, since its ones digits is ...

Math
Could the 1.5 miles take him farther because it said across and not around the loop? There might be another 1.5 to add to the total. Not sure...

maths
In general, distance = rate x time This case: distance = (rate + current) x time distance = (rate - current) x time 100 = (50 -c)(t) 100 = (50+c) (t + 3 3/4 minutes) This should get you started.

physcial science
B moving electric charges cause a magnetic field to form.

Math
multiply the 7.5 times 3 to give you 22.5 times 10^-5 To get to standard notation you need to write the 22.5 as 2.25 x 10^1 combine the 1 + -5 to get -4 because we have the same base of 10. When multiplying, you keep the base and add the exponents. 2.25 x 10^-4

physics
32 m/sec will be decreased at for 3.0 sec. 32-12 = 20 m/s 4.0 m/sec times 5.25 sec. = 21 m/sec 1m/sec faster. b) d= rt You could use the average rate by computing the beginning and ending speeds

Geometry
yes!

math Help Azap!!!
To solve for a, we first have to remove the ( ) 9a -3a +18 = -6 6a + 18 = -6 Can you finish from here? Be sure to check your answer in the original equation.

Algebra
1) 7(3) = -56(33y) 7(3)/ (-56)(33) = y 2) (8)(44) = (29)(11k) (8)(44)/(29)(11) = k Can you finish from here? You can make the math a little simpler by cancelling.

Math
divide both sides by -4 which causes you to flip the sign...you have the sign correct, but it should be a 3 The first choice. Every set is a subset of itself, so it should be the last choice.

algebra
It looks like k = -2 because 3x times -2 = -6x and -2 times -2 = 4

English
What literary device is being used in this passage? "'See!' he cried triumphantly. 'It's a bona-fide piece of printed matter. It fooled me. This fella's a regular Belasco. It's a triumph. What thoroughness! What realism! Knew when to stop, too--...

Klasmeyt may sagot ka na dyan? naghahanap din po ako eh.. need help po :)

geomtry
two angles form a linear pair the measure of one angle is 24 more than the measure of the the other anglr

Math
A lock has 3 tumblers each has 10 numbers from one through zero, how many possibilities to open lock and what are the numbers ?

Math
Typo 1/12

Math
12 marbles total 3/12 times 3/12 if you are replacing it. 1/4 times 1/4 = 1/16 There are 6 possible outcomes. 1/6 to roll a three and 3/6 to roll an even number. For both to happen you have 1/6 times 1/2

algebra
2x + 3y = 1470 Slope intercept form is y = mx+b So you want to solve for y: subtract 2x from both sides and divide by 3. 3y = -2x +1470 y = -2/3 x + 1470/3 or y = -2/3x +490 To graph you would start at the point (0,490) and to find the next point you would use -2/3 = change in...

Physics
A golf ball strikes a hard, smooth floor at an angle of 20.7 ° and, as the drawing shows, rebounds at the same angle. The mass of the ball is 0.0528 kg, and its speed is 40.2 m/s just before and after striking the floor. What is the magnitude of the impulse applied to the ...

Math
It is -9 sorry about the typo.. I am glad Ms. Sue caught that.

Math
Simplify like terms which means to combine the 10h -5h which is 5h 9 + 5h = 0 subtract 9 from both sides 5h = 9 Divide by 5 to get h = 9/5

Math
Here is a nice website that shows steps that you asked for in #4 - I am not allowed to post it. Do a google search of solving linear equations and look for one related to NYS regents. If you can solve for the variable, the equation is open. If you eliminate all of the ...

Math
projectile hits the ground when s(t) = 0 meaning the height off the ground is zero. 0 = 144t -16 t^2 Factor out the t: 0 = t(144 -16t) set each part = to zero t = 0 the projectile wasn't launched yet and 144- 16t = 0 solve for t to find out how long the projectile was in ...

physics
A 56-kg rollerblader skates across a skating rink floor. The graph below shows the net external force component F cos è along the displacement as a function of the magnitude of the displacement d. Determine the Following: (a) work done by the net force component F cos &...

statistics
17 balls total There are 10 red 10/17 is your chance.

math
For #4, you are subtracting 1 from each part and not adding it. subtracting 1 gives you 2x = 10 and 2x = -12 You had the right idea, but the adding 1 is wrong, you really subtracted 1. Teacher was probably looking for you to show the adding 8 and dividing by 4 and for the ...

Math
When you solve the equations, you will find that when the letters (variables) are eliminated you will be left with a number on each side of the equal sign. If they numbers are the same, you have and identity. If not, it is not an identity.

Physics
12.13m

Georgia History
am I right Ms.Sue

Georgia History
I think it is A,B,C

Georgia History
well I have 1,2,3 but I do not know 4 choose all that apply georgians were unaffected by the proclamation because they had no claim to forbidden lands. colonists were angry that the crown was protecting the americans indians, whom they had just fought in the french and indian ...

Georgia History
which of the following effects of the french and indian war most contributed to smuggling in the colonies? increased taxes from the crown enforcement of the navigation acts presence of british soldiers in the colonies removal of the spanish from flordia which economic system ...

Math
thank you

Math
the one with ***** that is the one I choice

Math
4*8 8^4 8*8 4^8******

Math
which expression is equivalent to 4*4*4*4*4*4*4*4

Probability
Lidsney inspected shipments of applices. She inspected 3 from a batch of 140 . If she finds 3 with defects the entire lot is rejected. If max knows knows that 9 of her appliances have minor defects. Find the probability that lidya will reject max shipment of appliances.

physical science

Georgia History
I did but it only talks about the stuff before the royal period

Georgia History
Ms. Sue can you help me

Georgia History
I have already read theses I just need like to sentences of what developments that happened after the trustees system failed

Georgia History
what happened to Georgia after it became a royal colony? I am having to do a essay so I would like to know what happened.

science
Both carbon dioxide and water are pure substances. How are they similar to each other? A. both substances have a set ratio of atoms that cannot be separated by physical means B. both substances have a set ratio of atoms that can be separated by physical means C. both separated...

physics help
A block of wood experiences a normal force of 32 N from a rough,flat surface.there is a rope tied to the block.the rope is pulled parallel to the surface and the tension in the rope can be increased to 8 N before the block starts to slide. Determine the coefficient of static ...

math
that is correct 3+2 is five times 5 is twenty-five. you got it!!!

math
Compare 3+2 times 5 to (3+2) times 5. i put order of operations and got 5 times 5 for the first one, and for the second. I need to now if that is correct and if not what is wrong. thanks, John :)

Language arts
A dependent clause is a group of words that also contains a subject and a verb, but it is not a complete thought. Because it is not a complete thought, a dependent clause cannot stand on its own as a sentence; it is dependent on being attached to an independent clause to form ...

Science- RE-DO
you cant be on a re do and ask for answers. your teacher needs to know you understand it and you posted what i am almost sure is every question on the homework... :(

math
A water tank will be drained at a constant rate of 42.4 liters per hour starting at 9:00 A.M. After one hour, the change in the amount of water in the tank can be represented as –42.4. Which of the following represents the total change in the amount of water in the tank ...

algebra 2
Joe will rent a car for the weekend. He can choose one of two plans. The first plan has no initial fee but costs \$0.90 per mile driven. The second plan has an initial fee of \$65 and costs an additional \$0.40 per mile driven. How many miles would Joe need to drive for the two ...

chemistery
What is the equilibrium constant for the reaction taking place at room temperature (T = 25◦C) in the battery Zn(s)| Zn2+(aq)|| Ce4+(aq)| Ce3+(aq) ? Assume that the number of electrons transferred in the reaction is n = 2. Zn2+ + 2 e − → Zn E ◦ red = &#...

English

Chemistry
How many grams of iron at 200.0 c must be placed in 200.0 g of water at 18.0 c so that the temp of both will be 30.0 c ? Okay so the SH of iron = .106 This is what I have set up.. Not sure if I'm going at this the right way.. (.106) (m) (170.0) = (1.0) (200.0) (12.0) I don...

English
What is the archetype in By the Waters Of Babylon for The Quest to Know who you are, with an example from the book

algebra
Solve y=kx for k

Georgia History
thank you

Georgia History
which of the following immigrant group came to Georgia unwillingly. A.Quakers B.Scots-Irish C.slaves D.Puritans I think C

A tourist bureau survey showed that 80% of those who seek information about the state actually come to visit. The office received 7 request for information. What is the probability that all will visit? What is the probability that at least one will? I've tried to figure ...

physics
A 0.19 kg hockey puck has a velocity of 2.1 m/s toward the east (the +x direction) as it slides over the frictionless surface of an ice hockey rink. What are the (a) magnitude and (b) direction of the constant net force that must act on the puck during a 0.36 s time interval ...

Waka sss
The oxidation number of sulphur in CUSO4.5H2O IS

science
what is the half-life of the nuclide

Chemistry
When 0.100 g of calcium oxide is added to 125 g of water at 23.6°C in a coffee cup calorimeter, this reaction occurs: CaO (s) + H2O(l) -> Ca(OH)2 (aq) ∆H = -81.9kJ/mol If the specific heat capacity of water is 4.184 J g-1 °C-1, what is the final temperature of...

algebra
solve the system by substitution x+y=9000 .06x+.15y=1215 .06x+.15(x-9000)=1215 .06x+.15x-1350=1215 .21x-1350=1215 x-1350+1214.79 x+2564.79 don't look right? where did I go wrong

Physics
A rifle bullet, traveling at "v1" strikes a large tree an penetrates to a depth of "d". the mass of the bullet is "m". assume the de-acceleration is constant as it penetrates the tree. a) the time required to stop. b) the de-acceleration of the ...

physics
if two forces 10N and 20N are inclined at angle 60degree to each other. Find the resultant force.

programming ,object oriented
The Parasol Insurance Group sells a variety of insurance policy types. Design a flowchart for a program that accepts a client’s name and “Y’ or “N’ string answers to questions about whether the client wants each of the following policy types: ...

Algebra
A phone company offers two monthly charge plans. In Plan A, the customer pays a monthly fee of \$5 and then an additional 4 cents per minute of use. In Plan B, there is no monthly fee, but the customer pays 6 cents per minute of use. For what amounts of monthly phone use will ...

preschool
They don't really know. They just do.

english
thank you Reed. For question #2, is it B? Wearing a warm coat, I walked to the store.

english
My favorite hobby in high school was showing horses in community horse shows. Which of the following is the simple subject? a. High school b. Horses c. Shows d. Hobby i think the answer is d.) hobby 2. Which of the following sentences is written correctly? a. I found the shoe ...

ohs
Sara is six years older than Ben. Five years ago, Sara was one and a half times ad old ad Ben. What is Sara's current age? How did the teacher come up with Sara's current age of 23? I have no idea

How would you convert 1.5 square iles to dm^2?? I don't know how to show my work for this particular one.

Math (GOT IT!)
I think I got it I went from cm^3 to L to gal to qts to pints and multiplied then divide from there.

Math
I'm not sure how to arrive at my answer. Convert 1.745 * 10 ^-5 m^3 to pints How would you show the work for that because my conversion are wrong.

A bridge member is exerting a force of 500lbs on a joint. The member is connected to the bridge at an angle of 50 degrees. Calculate the x and y components.

A plane is traveling toward the southwest at 200 km/h. Calculate the westward and southward components of the velocity.

Biology
What is the phase where chromatin condenses to form chromosomes

Math
What is 7,560 in scientific notation

Algebra
Working together, Sandy and Carol can pack a storage unit in 4 hours. If they work alone, it takes Sandy 6 hours longer than it takes Carol. How long would it take Carol to pack the storage unit alone?

physics
Convert the resultant vector into its x and y components. 225 N at 12 degrees A.(222.3 N, 37.4 N) B(201.1 N, 10.8 N) C.(45.8 N, 201.1 N) D.(220.1 N, 46.8 N)

physics
When a 0.106 kg mass is suspended at rest from a certain spring, the spring stretches 3.50 cm. Find the instantaneous acceleration of the mass when it is raised 5.20 cm, compressing the spring 1.70 cm.

American History
Throughout the 17th and 18th centuries the colonists underwent a gradual transformation---they became less Anglo-American and more uniquely American. Discuss four elements responsible for this slow metamorphosis. (To merely list the elements is not enough, you must show how ...

P6 maths
At a concert, tickets were sold at \$12 , \$30 and \$50. The sales of \$12 tickets made up 25% of the total amout of money collected. The sales of \$30 tickets made up of 60% of the total amount . Given that 5 more \$12 tickets were sold than the \$30 tickets , how many \$50 tickets ...

P6 maths
Thank you!

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