Saturday
March 15, 2014

# Homework Help: Health: First Aid

Recent Homework Questions About First Aid

math
First of all the equation should say: h = -16t^2 + 140t + 40 you want h = 30 30 = -16t^2 + 140t + 40 16t^2 - 140t - 10 = 0 t = (140 ± √20240)/32 = 8.8 or a negative, which we will reject it would take about 8.8 seconds to reach a height of 30 ft (on its way down)
Tuesday, November 26, 2013 at 11:43pm

chemistry
A standard solution is prepared for the analysis of fluoxymesterone (C20H29FO3), an anabolic steroid. A stock solution is first prepared by dissolving 13.4 mg of fluoxymesterone in enough water to give a total volume of 500.0 mL. A 100.0-µL aliquot (portion) of this ...
Tuesday, November 26, 2013 at 10:42pm

First, tell me what you think it should be?
Tuesday, November 26, 2013 at 10:02pm

Hi. again. The word "Ribbons" makes no sense. so my guess is that you should underline that word and replace it with the word: "Recipes." The women exchanged Recipes at the cake sale. At first I thought it should've been exchanged numbers, but since ...
Tuesday, November 26, 2013 at 9:33pm

English
I know for sure it isn't the first or last one.
Tuesday, November 26, 2013 at 9:02pm

Can someone plz help me?
4) The ratio of the number of tickets sold from Jane to Blake is 8:52. Simplify this to get 4/27. 10) Distance between starting line and first aid is 1.25 inches. Convert to miles: 2 inches=50 miles 1 inch=25 miles 1.25=1 mile and a quarter 50/4=12.5 25+12.5=37.5 miles from ...
Tuesday, November 26, 2013 at 4:54pm

Can someone plz help me?
1. Write the ratio in the simplest form. 16:24 (1 point) 1:2 4:3 3:4 2:3 4. Blake sold 52 tickets to the school play, and Jane sold 8 tickets. What is the ratio, in simplest form, of the number of tickets Jane sold to the number of tickets Blake sold? (1 point) 4/27 2/13 13/2 ...
Tuesday, November 26, 2013 at 4:41pm

english
PRIDE AND PREJUDICE The idea of Mr. Collins, with all his solemn composure, being run away with by his feelings, made Elizabeth so near laughing that she could not use the short pause he allowed in any attempt to stop him farther, and he continued: "My reasons for ...
Tuesday, November 26, 2013 at 12:11pm

The idea of Mr. Collins, with all his solemn composure, being run away with by his feelings, made Elizabeth so near laughing that she could not use the short pause he allowed in any attempt to stop him farther, and he continued: "My reasons for marrying are, first, that I...
Tuesday, November 26, 2013 at 11:43am

Physic: Projectile Motion
Two rifles are fired at targets, which are 100 m away. The first rifle fires bullets at 1200 ft/s and the second fires a bullet at 3000 ft/s. How long will it take each bullet to get to the target? If both are aimed directly at the bull's-eye, how far will each bullet ...
Tuesday, November 26, 2013 at 10:19am

chemistry (Dr.Bob222)
Ok, so when doing a serial dilution, would you day that the first well with no ppt represents a perfectly saturated solution, why or why not?
Monday, November 25, 2013 at 11:15pm

chemistry (Dr.Bob222)
The first sentence ending with the question mark makes sense. The rest does not. The answer to the first sentence is No, serial dilution may start at any concn one chooses.
Monday, November 25, 2013 at 11:12pm

Science
ok...les see dis. first, start with this equation (P1)(V1)/(T1)=(P2)(V2)/(T2) <--- Note that numbers are supposed to be SUBSCRIPTS we are solving for the new volume, so in this case, V2. so, solve for V2... V2 = (P1 x V1 x T2)/(P2 x T1) BEFORE u plug in numbers, ALWAYS USE ...
Monday, November 25, 2013 at 10:22pm

chemistry
I think the answer is mostly one of reducing the evaporation of the ethanol. That is especially true if the ethanol is being used as a standard for some measurement. The vapor pressure of absolute ethanol at 19 C is something of the order of 40 mm Hg. If you add the water ...
Monday, November 25, 2013 at 10:09pm

San Sebastián
In Harry's attic there are. Three spider webs.the first web is twice as larger as the second web. The third web is 3 inches larger than the first web.The combined width of the three webs is 1 foot and 6 inches.How many long is each web?
Monday, November 25, 2013 at 9:33pm

math
The house numbers on Carr Memorial Avenue follow a pattern.The first four houses on the left side of the street are numbered 8,14,20,and 26.How many more houses are on the left side of the street with numbers less than 50
Monday, November 25, 2013 at 9:14pm

math
The house numbers on Carr Memorial Avenue follow a pattern.The first four houses on the left side of the street are numbered 8,14,20,and 26.How many more houses are on the left side of the street with numbers less than 50
Monday, November 25, 2013 at 9:08pm

Algebra 1
The first two are correct to the nearest integer. The third is a trick question, you cannot take the square root of a negative number
Monday, November 25, 2013 at 8:25pm

math
first try, x=1, turns out to be a zero So ... synthetic division 3x^3+x^2-8x+4 > 0 (x-1)(3x^2 + 4x - 4) > 0 (x-1)(x+2)(3x - 2) > 0 so the corresponding function y = 3x^3 + x^2 - 8x + 4 has x-intercepts of -2, 1 and 2/3 and knowing the shape of this standard cubic to ...
Monday, November 25, 2013 at 6:41pm

math
How do you propose we show a "graphing calculator" solution on here ? since choices of x+ ±1, ±2 are the obvious first guesses and x = 2 can be found to be a solution in a few seconds, I then did a synthetic division to get 6x^3-13x^2+x+2=0 (x-2)(6x^2...
Monday, November 25, 2013 at 6:32pm

help me please i dont know what happened and i want to know so i can avoid it next time! (that was not the first time it has ever happened.)
Monday, November 25, 2013 at 6:00pm

math
look for low-hanging fruit first when x=1, y=3+1-8+4 = 0, so we have (x-1)(3x^2+4x-4) That factors into (x-1)(3x-2)(x+2) Now, from our general knowledge of cubics, we know that y<0 to the left of the smallest root. Then y alternates signs between roots, so we have y>0 ...
Monday, November 25, 2013 at 5:24pm

math(help)
Here's the first one. 3/4 + 6/10 = 3/4 + 3/5 = 15/20 + 12/20 15/20 + 12/20 = 27/20 = 1 7/20 Study this site. Then try the others yourself. http://www.mathsisfun.com/fractions_addi​tion.html
Monday, November 25, 2013 at 4:24pm

Spanish
First of all, notice the different word order between questions and answers. 1. In the question, the subject is inverted, or in other words, the verb comes before the subject. In the answer then, the subject should come before the verb = No, Rolando no le escribe un correo ...
Monday, November 25, 2013 at 1:47pm

Plz help :(
1. Write the ratio in the simplest form. 16:24 (1 point) 1:2 4:3 3:4 2:3 2. Solve the following proportion. x over three equals six over nine (1 point) 18 27 2 24 3. A recipe calls for 3 cups of flour to make 3 dozen cookies. Use the proportion to calculate how much flour is ...
Monday, November 25, 2013 at 12:07pm

us history
How did immigrants regard public education? a. as an aid to assimilation b. as a threat to cultural heritage c. as a path to advancement d. all of the above
Monday, November 25, 2013 at 11:28am

math
using the factor theorem, I tried x = ±1, ±2, ±5 I found x=1 and x=-1 to work as well as x=-2 so factors would be (x+1)(x-1)(x+2)(........) I can reason that the first term of the missing factor is x and it must end in -5 so x^4-3x^3-11x^2+3x+10 = (x-1)(x+...
Monday, November 25, 2013 at 11:10am

Englishj
MOONACHIE, NEW JERSEY (How do we pronounce 'Moonachie'? Do we stress the first syllable or the second syllable?)
Monday, November 25, 2013 at 7:52am

Magnetic effect
A positive helium ion He+ is released from rest at the surface of a +1000 V flat electrode. It travels in the +x-direction (in vacuum) across a 1 mm gap, passes through a small hole in a +0 V electrode that is parallel to the first one, and enters a region of 1. magnetic field...
Monday, November 25, 2013 at 1:11am

Science, Physics, math, calculus
You would like to shoot an orange out of a tree with your bow and arrow. The orange is hanging 5.00 m above the ground. You fire the arrow at 35.0 m/s oriented 30.0° above the horizontal from a height of 1.30 m while standing 47.0 m away on your first try. You may neglect ...
Sunday, November 24, 2013 at 11:31pm

Socials
What were the poor laws? What was their purpose and what did they set out to do? my answer for the first part: - The poor laws was a law regulating the public relief or support of the poor. Its purpose was...?
Sunday, November 24, 2013 at 10:44pm

Water Treatment
Wastewater from a small town is treated in a trickling filter which is preceeded by a screen, sand-removal and primary clarification. The maximum hydraulic capacity, or peak flow, of the treatment plant is 1,500 m3/h. The dry weather flow (Qdwf) amounts 7,500 m3/day, with a ...
Sunday, November 24, 2013 at 10:24pm

Calculus Area between curves
Consider the area between the graphs x+6y=8 and x+8=y2. This area can be computed in two different ways using integrals First of all it can be computed as a sum of two integrals where a= , b=, c= and f(x)= g(x)= I found a, but not b or c. I can't seem to figure out f(x) ...
Sunday, November 24, 2013 at 10:20pm

Science-Ms.Sue
Suppose some natural disaster occurs and a species of finch is forced to relocate from its original island where it dined on cactus flowers to an adjacent island with many fewer cacti but an overabundance of orchids. What would be the immediate consequences to the species in ...
Sunday, November 24, 2013 at 10:17pm

english essay
can someone critique my essay, please? :) here's my instructions: Prompt 1: Considering what you have learned about Hemingway, his journalistic style, and how his experiences influence his writing, write a prediction for The Old Man and the Sea. Who is the old man? What ...
Sunday, November 24, 2013 at 8:51pm

Chemistry
I can show you how. dG = -RT*lnK dG = -4.65 kJ/mol = 4650 J/mol substitute in the above and solve for K. Then ............A + B ==> C I..........0.3..0.4...0 C..........-x...-x....x E........0.3-x...4-x..x Substitute the E line into the Keq expression (use K from the first ...
Sunday, November 24, 2013 at 8:25pm

Science
Study the image of the fossil shown below. How might a scientist use this fossil to learn more about the history of life on Earth? connexus dot com/content/media/917517-4162013-72829-P​M-1012149111.jpg to compare structures in the fossil with homologous structures in ...
Sunday, November 24, 2013 at 7:48pm

physics
The masses of blocks A and B are 4.5 kg and 3.7 kg respectively. The blocks are initially at rest and are connected by a massless string passing over a massless, frictionless pulley. The system is released from rest. a. What is the acceleration of the blocks? b. What is the ...
Sunday, November 24, 2013 at 7:05pm

The masses of blocks A and B are 4.5 kg and 3.7 kg respectively. The blocks are initially at rest and are connected by a massless string passing over a massless, frictionless pulley. The system is released from rest. a. What is the acceleration of the blocks? b. What is the ...
Sunday, November 24, 2013 at 6:34pm

First things first
Draw the images first. Then you can worry about what to write.
Sunday, November 24, 2013 at 6:34pm

statistics
1. A professor measured the time (in seconds) required to catch a falling meter stick for 19 randomly selected students’ dominant and non-dominant hand. The professor claims that the reaction time in an individual’s dominant hand is less than the reaction time in ...
Sunday, November 24, 2013 at 3:33pm

science
How did Lamarck and Darwin differ in their thinking about species? A. Darwin thought that organisms could induce their own changes, while Lamarck thought that change could only be induced by an organism's environment. B. Darwin thought that change could occur in individual...
Sunday, November 24, 2013 at 11:59am

MATH
First re-arrange it into slope intercept form: y = mx + b x + 4y = -4 4y = -x - 4 y = -x/4 - 1 y = (-1/4)x - 1 Therefore the slope is -1/4 and the y-intercept is -1
Sunday, November 24, 2013 at 11:50am

MATH
slope, call it m, is m = (Y2-Y1)/(X2-X1) m = (-4 - 4) / (0 - -4) = -8/4 = -2 NOW SKETCH A GRAPH AND LOOK AT THOSE POINTS AND A LINE FROM THE FIRST TO THE SECOND. NEVER do one of these problems with sketching a quick graph off to the side.
Sunday, November 24, 2013 at 11:06am

magnets
A positive helium ion He+ is released from rest at the surface of a +1000 V flat electrode. It travels in the +x-direction (in vacuum) across a 1 mm gap, passes through a small hole in a +0 V electrode that is parallel to the first one, and enters a region of magnetic field. ...
Sunday, November 24, 2013 at 1:18am

English
The duckling started swimming out of instinct when she followed the rest of the flock into the lake for the first time. Do any commas need to be added?
Saturday, November 23, 2013 at 8:50pm

CHEMISTRY BALANCING CHEMICAL EQUATION
First, get rid of the C One you post the correct formulas, then maybe you can get somewhere.
Saturday, November 23, 2013 at 7:25pm

So that means the St Clairs are friends with the narrator's parents, right? Do you kow where this story comes from? It's a chapter out of the book called The Joy Luck Club. "The Joy Luck Club refers to the novel by Amy Tan, published in 1989 ... In various forms, ...
Saturday, November 23, 2013 at 6:43pm

math
LOL! Who's on first?
Saturday, November 23, 2013 at 5:13pm

Solar Energy
Formula in first question: a)Pmpp < Voc X Isc Formula in second question: Load resistance = Vmpp/Impp
Saturday, November 23, 2013 at 4:28pm

Math-Algebra 1
Part 2: The point pairs chosen is (5, 1) and (-3, 4). First of all, the slope must be found out. The formula for it is: slope = rise/run slope = (4 - 1)/(-3 -5) = 3/-8 = -3/8 Point slope form: y - 1 = -3 (x - 5)/8 Slope intercept form: y - 1 = -3x/8 + 15/8 y = -3x/8 + 23/8 ...
Saturday, November 23, 2013 at 3:23pm

Math-Algebra 1
Different texts use slightly different names for the form of the linear equation. e.g 4x + 3y -12 = 0 -----> I would call general form 4x + 3y = 12 -------> standard form y = (-4/3)x + 4 ---- > slope-y intercept form point-slope form is a starting equation, usually ...
Saturday, November 23, 2013 at 3:02pm

Magnets
A positive helium ion He+ is released from rest at the surface of a +1000 V flat electrode. It travels in the +x-direction (in vacuum) across a 1 mm gap, passes through a small hole in a +0 V electrode that is parallel to the first one, and enters a region of magnetic field. ...
Saturday, November 23, 2013 at 2:08pm

Math
102=8a+5a-3a I add 8a and 5a first to get 13 and then add 3?
Saturday, November 23, 2013 at 12:54pm

algebra 2
Except for multiplying/dividing by a negative number, treat just like an equation. First get rid of the parentheses by multiplying. 2x - 10 > 6x -18 Subtract 2x from both sides and add 18 to both sides. You should be able to work it from there.
Saturday, November 23, 2013 at 12:49pm

3. A positive helium ion He+ is released from rest at the surface of a +1000 V flat electrode. It travels in the +x-direction (in vacuum) across a 1 mm gap, passes through a small hole in a +0 V electrode that is parallel to the first one, and enters a region of magnetic field...
Saturday, November 23, 2013 at 11:33am

Physics
tensionbottom=mg+mv^2/r solve for v. force on set must equal tension... b.total acceleration is a vector of g downward, and mv^2/r along the radial. but tension alone, along the radial, tension=mgcosTheta+mv^2/r but tension and gravity force=net force net force=mass*...
Saturday, November 23, 2013 at 10:08am

x/s + y/w = 1 s/x + w/y = 4 You can use substitution. From the first equation, wx + sy = sw x = (sw - sy)/w Substitute to the second equation: s/x + w/y = 4 sy + wx = 4xy sy + (w)((sw - sy)/w) = 4((sw - sy)/w)y sy + sw - sy = 4y(sw - sy)/w sw^2 = 4swy - 4sy^2 4sy^2 - 4swy + sw...
Saturday, November 23, 2013 at 10:03am

English
1 ~~ In this sentence, "open" is an object complement. It's an adjective modifying the direct object "it." http://grammar.ccc.commnet.edu/grammar/o​bjects.htm#objects Scroll down to the COMPLEMENTS section and read the second example given for ...
Saturday, November 23, 2013 at 8:51am

waste water
The cross-sectional surface area of the screen channel during maximum flow = 0.75 m2. The maximum free surface area in the clean screen = 0.5 m2. Use hL=1C⋅(V2−v2)(2⋅g) for calculating the head loss, the friction coefficient (C) for a clean screen is 0.7. ...
Saturday, November 23, 2013 at 4:03am

cal
I think you meant: f(x) = x/(x^2 + 1) (or else why not just reduce it to f(x) = 1/x + 1 ? ) for concave upwards, f ''(x) > 0 f'(x) = (1 - x^2)/(x^2 + 1)^2 using the quotient rule and again f''(x) = 2x(x^2-3)/(x^2+1)^3 so when is f''(x) positive...
Friday, November 22, 2013 at 11:24pm

pre-algebra
Are you sure the first term is w^2 or w^3? Anyway, if it's w^3, w^3 + 4w^2 - 4w = 16 w^3 + 4w^2 - 4w - 16 = 0 w^2(w + 4) - 4(w + 4) = 0 (w^2 - 4)(w + 4) = 0 (w + 2)(w - 2)(w + 4) = 0 w = -2 w = 2 w = -4 Hope this helps :3
Friday, November 22, 2013 at 8:34pm

cal
f(x) = x^2 + √x We can rewrite this as: f(x) = x^2 + x^(1/2) Therefore, the first derivative is f'(x) = 2x + (1/2)*(x^(-1/2)) And the second derivative is f''(x) = 2 + (-1/4)*(x^(-3/2)) Hope this helps :3
Friday, November 22, 2013 at 8:25pm

pyschology
A prototype is a model or one of the first of its kind to be designed. http://en.wikipedia.org/wiki/Prototype http://www.google.com/search?q=prototype​+clothing&oq=pr&aqs=chrome.2.69i57j69i59​l2j69i60l2j69i59.13263j0j8&sourceid=chro​me&espv=210&es_sm=93&ie=UTF-
Friday, November 22, 2013 at 7:52pm

math
They conveniently have the x-axis divided into 3-day periods. For the first rectangle, the height is 3, so its area is 3x3 = 9 The next rectangle has height 4, and so on. Then just add up all the areas.
Friday, November 22, 2013 at 5:55pm

algerbra 2
multiply the 2nd by 2 to get 4k-2 < 10 Now add the first, and we have -26 < 4k-2 < 10
Friday, November 22, 2013 at 5:47pm

Science~!
surely the answer to the first one is Products are chemically different from reactants. H2 + Cl2 = 2HCl
Friday, November 22, 2013 at 4:47pm

physics
A skier of mass 77.7 kg, starting from rest, slides down a slope at an angle $\theta$ of 35.7° with the horizontal. The coefficient of kinetic friction is 0.08. What is the net work, i.e. net gain in kinetic energy, (in J) done on the skier in the first 10.9 s of descent?
Friday, November 22, 2013 at 1:59pm

Linguistics/English
I also need help with figuring how to draw certain things like the 'of' and 'on' in the first sentence.
Friday, November 22, 2013 at 1:01pm

physics
A spacecraft of mass is first brought into an orbit around the earth. The earth (together with the spacecraft) orbits the sun in a near circular orbit with radius ( is the mean distance between the earth and the sun; it is about 150 million km). (a) What is the speed (in m/s) ...
Friday, November 22, 2013 at 12:43pm

language arts
Friday, November 22, 2013 at 12:21pm

language arts
We saw the months of wicked weather, As day to painful night did turn, Waiting, huddled close together For the frozen sun’s return. Our nights were almost endless torture. Our food was gone. Our fuel was low. We came in search of grand adventure But ended trembling in the...
Friday, November 22, 2013 at 11:49am

magnetism help
A positive helium ion He+ is released from rest at the surface of a +1000 V flat electrode. It travels in the +x-direction (in vacuum) across a 1 mm gap, passes through a small hole in a +0 V electrode that is parallel to the first one, and enters a region of magnetic field. ...
Friday, November 22, 2013 at 10:42am

English II - Concluding an essay!!!
1. Need: Use the right prepositions: ~ ... create a strong contrast with the virtuous and innocent Desdemona ... ~ Use something other than "toward" in the third sentence of the conclusion. 2. Suggestion: Use the term "foil" in the second sentence of the ...
Friday, November 22, 2013 at 10:09am

English
Yes, you need the comma whenever "too" means "also." The first and third are the grammatically correct ones, but the others are casually used.
Friday, November 22, 2013 at 7:05am

English
1. Yes, "nor" means "and not." With "neither," this is an example of a correlative conjunction. http://grammar.ccc.commnet.edu/grammar/c​onjunctions.htm#correlative_conjunctions​ 2. The first is often used casually (but is ...
Friday, November 22, 2013 at 7:04am

Algebra 2
they're, not there. first, factor out the 2 so you have smaller numbers to work with 2(x^2-8x+16) = 0 Now you want two numbers which add to -8 and multiply to +16 -4 and -4 fit the bill, so 2(x-4)(x-4) = 0 Now the answer is clear. x=4 is a double root.
Friday, November 22, 2013 at 6:24am

Water Treatment
Wastewater from a small town is treated in a trickling filter which is preceeded by a screen, sand-removal and primary clarification. The maximum hydraulic capacity, or peak flow, of the treatment plant is 1,500 m3/h. The dry weather flow (Qdwf) amounts 7,500 m3/day, with a ...
Friday, November 22, 2013 at 6:07am

biology
Which photosystem-1 or 2-most likely evolved first?
Thursday, November 21, 2013 at 11:19pm

Algebra 1
better form .... -2x + y = 2 ---> 2x - y = -2 4/3x+y=19/3 ----> 4x + 3y = 19 1/2x+y=-13/2 ----> x + 2y = -13 9/7x+y=-3/7 ---->9x + 7y = -3 7/9x+y=-10/3 ----> 7x + 9y =-30 can you see what I did? A proper way to write equation in standard form: - no fractions ...
Thursday, November 21, 2013 at 11:05pm

Chris - Amy -Calculus Area between curves
Why are you switching names ?? find the intersection; from the first: x = 3 - 3y into the 2nd: y^2 - (3-3y) = 1 y^2 + 3y - 4 = 0 (y+4)(y-1) = 0 y = -4 or y = 1 in x = 3-3y .... if y = 1, x = 0 ---->(0,1) if y = -4 , x = 15 , ---> (15, -4) Your sketch should look like ...
Thursday, November 21, 2013 at 10:56pm

Calculus-Area between curves
first of all reduce the equation to simplest form: y = 2√x y = 5 y + 2x = 4 Your sketch should look like a "triangle" with one side slightly curved see: http://www.wolframalpha.com/input/?i=plo​t+y%3D2*sqrt%28x%29+%2C+y%3D5+%2C+y%2B2x​%3D4 we need ...
Thursday, November 21, 2013 at 10:41pm

Finance
3. Joe and Sue invested $2000 at Bank America in 1995, at 6% compounded quarterly. In the year 2000 they moved to another city and took the total money from their first investment added$500 and invested it at Bank Bravo, at 7% compounded quarterly. a. What is the value of ...
Thursday, November 21, 2013 at 9:45pm

statistics
Is there a significant difference between first year post college incomes of graduates from public versus private institutions? Provide the IV, DV, and best method of analysi
Thursday, November 21, 2013 at 9:41pm

math
r is never negative -- it is just the distance from (0,0). Plus, they said right at first, that sinθ = -2/3, so how did you come up with sinθ = -√5/3? Draw two triangles, one in QIII and one in QIV where y = -2 and r = 3. Then you will see why only (B) can be.
Thursday, November 21, 2013 at 7:41pm

Statistics
A researcher wished to test the effect of the addition of extra calcium to yogurt on the "tastiness" of yogurt. Two different yogurts, one with extra calcium and one without the added calcium, were created from the same batch of yogurt. A group of 84 adult volunteers...
Thursday, November 21, 2013 at 6:39pm

Computers (internet)
Make sure all students who plagiarize get a 0 on the assignment for the first offense. Make sure all students who plagiarize a second time are dropped from the class with FX for a grade (to indicate why the student failed the class). Those two methods are tried and true.
Thursday, November 21, 2013 at 5:45pm

math
1.) In a shipment of alarm clocks, the probability that one alarm clock is defective is 0.04. Charlie selects three alarm clocks at random. If he puts each clock back with the rest of the shipment before selecting the next one, what is the probability that all three alarm ...
Thursday, November 21, 2013 at 4:03pm

english
to be able The first fifty runners are going to be able to finish the race within an hour. been able (will need at least one auxiliary verb in order for this to make sense) The first twenty runners have been able to finish the race within 20 minutes.
Thursday, November 21, 2013 at 2:42pm

Chemistry
In certain first order reactions the concentration of the reactant decreases from 0.15 M to 0.11 M in 36 minutes . calculate the time of half reactions
Thursday, November 21, 2013 at 10:51am

cal
I will assume that you meant f(x) = 2x^(3/2) - 6x^(1/2) (or else we could just divide out the 2's in the first term) f ' (x) = 3x^(1/2) - 3x^(-1/2) f '' (x) = (3/2)x^(-1/2) + (3/2)x^(-3/2) or (3/2)( 1/√x + 1/(x√x) )
Thursday, November 21, 2013 at 9:50am

stastistics
The data show the time intervals is after an eruption(to the next eruption) of a certain geyser. Find the regression equation, letting the first variable be the independent (r) variable. Find the best predicted time of the interval after an eruption that the current eruption ...
Thursday, November 21, 2013 at 8:37am

Chemistry
A student was given 100mL of HCL solution in a 250mL beaker and told that the HCL was 0.11M. The student was also given phenolphthalein indicator and 250 ML of 0.1234 M NaOH. The student first filled a buret with NaOH solution. The student then placed an appropriate volume of ...
Thursday, November 21, 2013 at 4:28am

i gt q1 all the first part not second one? please help in it question 3 i got 1st part not second
Wednesday, November 20, 2013 at 11:34pm

Algebra, URGENT!!!
1) The first leg of a right triangle is 6 cm longer than its second leg. If the hypotenuse has a length of 8 cm, find the exact lengths of the two legs. First Leg: Second Leg: 2) The length of a rectangle is 10 m longer than its width and the area of the rectangle is 480 m2. ...
Wednesday, November 20, 2013 at 9:52pm

south carolina history help me ASAP PLZZZZZ
which state voted first against independence, but eventually voted for it? new york north carolina delaware south carolina
Wednesday, November 20, 2013 at 8:28pm

Math questions
Hi! Someone was helping me earlier with these but their explanation was hard to understand. Can someone ELSE help me? Thanka! :) 1.) There is a 10% chance it will rain on Saturday and a 30% chance it will rain on Sunday. What percent chance is there that it will rain on both ...
Wednesday, November 20, 2013 at 8:22pm

Math
Four hoses are filling a pool. The first hose alone would fill the pool in 4 hours while the second hose takes 6 hours. The third hose and the fourth hose each take 8 hours to fill the pool. How long would it take to fill the pool if all 4hoses are turned on?
Wednesday, November 20, 2013 at 8:03pm

Math Questions (AGAIN)
Hi! Someone was helping me earlier with these but their explanation was hard to understand. Can someone ELSE help me? Thanka! :) 1.) There is a 10% chance it will rain on Saturday and a 30% chance it will rain on Sunday. What percent chance is there that it will rain on both ...
Wednesday, November 20, 2013 at 6:43pm

Math
There were 7 times as many marbles in Box A as in Box B. After Joyce transferred 294 marbles from Box A to Box B, both boxes had the same number of marbles. How man marbles were there in Box A at first.
Wednesday, November 20, 2013 at 6:37pm

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