Friday
April 18, 2014

Posts by PLEASE HELP!


Total # Posts: 89

S.S redo
8d 9c 10a 11b 12b

S.S redo
1d 2c 3b 4a 5b 6b 7c

S.S redo
1. The economic centers of the Northeast are the region's __________. (1 point) farms fisheries forests cities 2. Two major ports in the South are ______________________. (1 point) Atlanta and Dalton Raleigh and Austin Miami and New Orleans New York City and Philadelphia 3...

S.S please help!
Oops wrong questions! posting new ones right now!

S.S please help!
1d 2c 3b 4a 5b 6b 7c My answers

S.S please help!
1 Marks: 3 Which statement best describes the government of Canada? Choose one answer. a. The monarch of Britain has total control over Canada. b. The Canadian parliament is ruled by the United States. c. Canada has complete power over its own government. d. The prime minister...

Physics
Please help with Problem 2!

Algebra
Jon and Melissa agree to meet in Chicago for the weekend. Jon travels 236 miles in the same time that Melissa travels 224 miles. If Jons rate of travel is 3 mph more than Melissas, and they travel the same length of time, at what speed does Jon travel?

chemistry
What is the molarity of 5g of O2 in 250 mL? Show work, please.

math
The quantity demanded x (in units of a hundred) of the Mikado miniature cameras/week is related to the unit price p (in dollars) by p = −0.2x2 + 80 and the quantity x (in units of a hundred) that the supplier is willing to make available in the market is related to the u...

physics
A spherical generator is used to produce a -15.00D surface on glass of refractive index 1.80. The diameter of the cutting tool is 80mm and the radius of the cutting surface is 4mm. What is the angle between the axis of the tool and the axis of the lens?

Physics
A spherical generator is used to produce a -15.00D surface on glass of refractive index 1.80. The diameter of the cutting tool is 80mm and the radius of the cutting surface is 4mm. What is the angle between the axis of the tool and the axis of the lens?

MATH/PHYSICS
1.) A bird can fly 20 km/h. How long does it take to fly 12 km?

PHYSICS
Vector V1 is 6.29 units long and points along the negative x axis. Vector V2 is 4.23 units long and points at +35.0° to the +x axis. (a) What are the x and y components of each vector? (b) Determine the sum V1 + V2.

calculus
I guess it's the format but I am little confused about what you did....

calculus
Can someone help me understand how to find the derivative of these two problems: (t^2-1/t^2+2)^3=y and y=sin^32x? I think with the first one, I could just foil it maybe and cancel but I don't know what to do with the ^3...and then the second one I haven't gotten the ha...

math
I have to evaluate the limit of these problems and I can't figure them out! 1.) Lim x-> 1 x^2+x-2/x^2-x 2.) (please note that the -2 is not under the square root) Lim x->0 sqroot 4+h -2/ h

Algebra 2
log4 (x-2) - log4 (x+1) = 1

Algebra 2
log x 8 = 2

Chemistry
oops the equation is actually 2SO2 (g) + O2 (g) yield 2SO3 (g) the yield part was an arrow facing both directions, not just the product side

Chemistry
Consider the following equilibrium at 1000K: 2SO2 (g) + O2 (g) ¡ê 2SO3 (g) A study of this system reveals that there are 3.5E-3 moles of sulfur dioxide gas, and 4.8E-3 moles of oxygen gas present in a 11.0L flask at equilibrium. The equilibrium constant for this re...

Math
Change into standard form 1. x^2+6x+4y+5=0 2. y^2+12x+2y+=-25

Math
Write the standard equation of the ellipse with the given characteristics Vertices: (0,7) (0,-7) foci: (0,2) (0,-2)

math
Suppose $5000 is deposited in a bank account that compounds interest four times per year. The bank account contains $9900 after 13 years. What is the annual interest rate for this bank account? i already set it up but i don't know where to go from there. Please help

Physics
I do not understand the part in which you solve for x. Is it supposed to be the cos of 60 equals x divided by .2?

Physics
The three 500 g masses in the daigram are connected by massless, rigid rods to form a triangle. What is the triangle's rotational energy (in J) if it rotates at 1.50 rev/s about an axis through the center? (Diagram shows equilateral triangle with 500g masses at each point,...

chemistry
I actually just redid it and found something close to 9.21?

chemistry
omg, thank u! I ended up getting something 1.70! THANKS!

chemistry
How many grams of NAC2H3O2 must be dissolve in enough water to prepare 250.0 mL of a solution with a pH= 9.200? Molar mass of NaC2H3O2 ia 82.03 g/mol. Ka for C2H3O2H is 1.8x10^-5

math
i'm having trouble with this math equation 5/2x^2-1/2^4 (need to find greatest common factor)

CHEMISTRY
ETHANOL (C2H5OH) HAS A DENSITY OF 0.80g/ml. IF A 10%(v/v) MIXTURE OF ETHANOL IN WATER WAS PREPARED HOW MANY GRAMS OF ETHANOL WOULD BE IN 100ML OF THE MIXTURE? (ASSUMING MIXED VOLUME IS THE SUM OF THE PARTIAL VOLUME)

Science/Math
Hello, Suppose that a newly discovered element called centium has three isotopes that occur in nature. These are centium-200, centium-203, and centium-209. Assume that these isotopes occur in equal amounts in nature. What will be the average atomic mass of this element?

Math
Write and equation to match the problem situation below. Callie has 4 rimes as many CDs as she has DVDs. She has a total of 60 CDs and DVD. How many dvds, d, does callie have?

chemistry
when water is combined with magnesium nitride to produce magnesium hydroxide and ammonia gas, is this reaction endothermic or exothermic and why?

chemistry
when water is combined with magnesium nitride to produce magnesium hydroxide and ammonia gas,

Math
c - 1/4c = 49.95

Math
2/7 k - 1/14 k = -3 does k= -42?

Math!
x/4 - 3x/2 = -1/2 I do not understand at all

Math
Luke bought some things at the store. He paid $5.98 for a pizza, $3.75 for a case of dr.pepper, $2.50 for a box of brownie mix. And $1.01 in sales tax. What information is needed to find Lukes correct change?

MATHE HELP!
Write an expression that can be used to find the average if these numbers: 7, -2, 10, -4, -9

Math
Maratha bakes between 4 1/4 and 9 3/4 hours each day at her bakery. About how many hours does she spend baking in one week?

MATH
A triangle with two congruent sides and two angles that both measure 45 is a.scalene and right b.isosceles and acute c.isosceles and right d. Equilateral and acute

Math Please Help
Oh sorry I meam two angles that are complementary have s sun of 45

Math Please Help
D?

Math Please Help
Which statement is not true? Two or angles that are supplementary have a sum of 180 or Two angles that are complementary have a sum ot 45

Math
Which of the following shapes could not represent a top, front, or side view of a pentagonal prism? a. A pentagon b. A triangle c. A square d. A rectangle

Math Please Help
Ok I get it. Thank you!!!

Math Please Help
But that equals 24 and that not a answer on the thing

Math Please Help
3/2 = .6 repaeating x 16 = 10.6 repeating and 16/1 x 2/3 = 10.6 reapeating

Math Please Help
I got 10 something but it's not one of the answers

Math Please Help
how?

Math Please Help
could I do it in a proportion?

Math Please Help
The premiters of two equilateral triangles are in the ratio 2:3. If the perimeter of the smaller triangle is 16 cm what is the measure of a side of the larger triangle?

physics
A 66.0 kg man is ice-skating due north with a velocity of 5.70 m/s when he collides with a 36.0 kg child. The man and child stay together hand have a velocity of 2.20 m/s at an angle of 33.0° north of east immediately after the collision. What was the velocity of the child...

physics
I tried this and got 118882 for Va' and 390097 for Va but it was wrong?

physics
An alpha particle collides with an oxygen nucleus, initially at rest. The alpha particle is scattered at an angle of 60.9° above its initial direction of motion, and the oxygen nucleus recoils at an angle of 51.9° on the opposite side of that initial direction. The fin...

Chemistry
Thank you! what is the 2257 from?

Chemistry
If 1.10 g of steam at 100.0 degrees celsius condenses into 38.5 g of water, initially at 27.0 degrees celsius, in an insulated container, what is the final temperature of the entire water sample? Assume no loss of heat into the surroundings

physics
A horizontal rifle is fired at a bull's-eye. The muzzle speed of the bullet is 795 m/s. The barrel is pointed directly at the center of the bull's-eye, but the bullet strikes the target 0.042 m below the center. What is the horizontal distance between the end of the ri...

physics
A golfer imparts a speed of 32.1 m/s to a ball, and it travels the maximum possible distance before landing on the green. The tee and the green are at the same elevation. (a) How much time does the ball spend in the air? (b) What is the longest "hole in one" that the...

College Calculus 1
A runner sprints around a circular track of radius 150 m at a constant speed of 7 m/s. The runner's friend is standing at a distance 300 m from the center of the track. How fast is the distance between the friends changing when the distance between them is 300 m? (Round to...

Science
The Ruby Throated Hummingbird has a resting heart rate of 250 beats per minute. When it is threatened or chased, it's heart rate can reach 1200 beats per minute. Predict its lifespan and justify your explanation.

Science
The Ruby Throated Hummingbird has a resting heart rate of 250 beats per minute. When it is threatened or chased, it's heart rate can reach 1200 beats per minute. Predict its lifespan and justify your explanation.

Science/Math
The Ruby Throated Hummingbird has a resting heart rate of 250 beats per minute. When it is threatened or chased, it's heart rate can reach 1200 beats per minute. Predict its lifespan and justify your explanation.

Math
I need to know how to write an equation for the horizontal line with the points of ( -2, -5). I understand that it should be written as y=k. So would it be, y=-2x-5 or would it be y=-5? Where do you find k?

MATH
The total sales made by a salesperson was $25,000 after 3 months and $68,000 after 23 months. Predict the total sales after 42 months.

Advanced Functions
Rena has been offered entry-level positions with two firms. Firm A offers a starting salary of $40 000 per year, with a $2000 per year increase guaranteed each subsequent year. Firm B offers a starting salary of $38 500, with a 5% increase every year after that. a)After how ma...

prob and stats
A test is conducted in 22 cities to see if giving away free transit system maps will increase the number of bus riders. In a regression analysis, the dependent variable Y is the increase in bus riders (in thousands of persons) from the start of the test until its conclusion. T...

Prob and Stats
In a multiple regression with 5 predictors in a sample of 56 U.S. cities, what would be the critical value for an F test of overall significance at a= .05? A. 2.45 B. 2.37 C. 2.40 D. 2.56

math
1 + ((2*3)/4) =2.5

chemistry lab repost
i need help locating a lab for regents chemistry. i have the data sheet but misplaced the rest of the lab. i know it's online somewhere, but i'm not sure which lab it is.. (what it is called). The data sheet has 3 charts on it, 1 titled 'solubility'. it include...

chemistry
Nevermind. 1 m = 100 cm. I got confused. Thank you.

chemistry
How? 1000 * 1000 = 1 million.

chemistry
1 km = ? cm. I was thinking 1,000,000. Could someone double check that?

physics
A tourist being chased by an angry bear is running in a straight line toward his car at a speed of 4.38 m/s. The car is a distance d away. The bear is 25.4 m behind the tourist and running at 5.88 m/s. The tourist reaches the car safely. What is the maximum possible value for ...

physics
A boat travels at 3.8 m/s and heads straight across a river 240 m wide. The river flows at 1.6 m/s. Find A) The boat's resultant velocity. B) How long it takes the boat to cross the river. C) How far downstream the boat is when it reaches the other side. Please help, i hav...

chemistry
i keep trying to do these problems and i don't understand them. please help me!! 1. Gas stored in a tank at 273 K has a pressure of 388 kPa. The save limit for the pressure is 825 kPa. At what temperature will the gas reach this pressure? A. 850 K B. 925 K C. 580 K D. 273 ...

microeconomics
When deriving an individuals demand curve how do you find the optimal bundle if you are only given: price of 2 goods and income. i.e- price of wine: $35 price of beer: $12 Income= $419

microecomomics
When deriving an individuals demand curve how do you find the optimal bundle if you are only given: price of 2 goods and income. i.e- price of wine: $35 price of beer: $12 Income= $419

why won't anybody help me
The region R, is bounded by the graphs of x = 5/3 y and the curve C given by x = (1+y^2)^(1/2), and the x-axis. a) Set up and evaluate an integral expression with respect to y that gives the area of R. b) Curve C is part of the curve x^2 - y^2 = 1, Show that x^2 - y^2 = 1 can ...

MATH-HELP!
The region R, is bounded by the graphs of x = 5/3 y and the curve C given by x = (1+y^2)^(1/2), and the x-axis. a) Set up and evaluate an integral expression with respect to y that gives the area of R. b) Curve C is part of the curve x^2 - y^2 = 1, Show that x^2 - y^2 = 1 can ...

math
The region R, is bounded by the graphs of x = 5/3 y and the curve C given by x = (1+y^2)^(1/2), and the x-axis. a) Set up and evaluate an integral expression with respect to y that gives the area of R. b) Curve C is part of the curve x^2 - y^2 = 1, Show that x^2 - y^2 = 1 can ...

Calculus
So sales must increase at a rate of 300 books per week. Thank U So much! im gonna work on the second half of the problem now.

Calculus
ok i redid it so q'=300?

Calculus
Ok $3000 is the rate at that the revenue is rising. Ok for the second answer i plugged it in and i got 30=q'

Calculus
ok i got p=20 p'=-1 q=1000 q'=200 and when i plugged them in i got r'=3000 is that right?

Calculus
R'=p'(q)+p(q')

Calculus
R=p*q

Calculus
i am a different person and i still do not understand it i get R'=3000-400X but i dont understand wat to do with the 5000

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