Friday
August 1, 2014

Posts by Dave


Total # Posts: 607

Maths Probability
Anyone know 5)?

Please help w/ Algebra
Could you explain why the length is 28-w?

Please help w/ Algebra
A rectangular field has a perimeter of 56 rods. If a strip 2 rods wide is cut from all sides of the field, the remaining part of the field has an area of 91 rods. Find the dimensions of the field.

physics
If an archaeologist finds an ancient fire pit containing partially consumed firewood and the 14C content of the wood is only 10% of an equal carbon sample from present day tree, what is the age of ancient site. 14 C has half life of 5730 years

math
A rectangle has side lengths of 5 centimeters and 3 centimeters. if the side lengths are doubled, will the area also doubal? Explain

teaching
How would you incorporate logic and experimentation into your curriculum and still emphasize Native American thinking into your curriculum? For example a science teacher could have students monitor and document the phases of the moon by dates and write down journal entries on...

Fractions
Last night 16/28 of the tenth grade girls and 19/30 of the tenth grade boys went to go ice skating. Did a greater fraction of tenth grade girls or boys went ice skating? Prove it.

Finance
what is the net present value of a note for $70,000, PAID MONTHLY AT $600, plus 7% interest

Biochem
If .1ml of serum, 5ml of reagent and 4.9ml of distilled water are mixed together what is the dilution of the serum in the final solution

math
A farmer wants to construct a pen with 100 feet fencing. The pen will be divided into two areas. Find the dimensions of the big pen. You may use your calculator or the fact that the x-coordinate of the vertex of a parabola is x=-b/2a. I would like to show a picture but somehow...

philosophy
Explain the theoretical basis of ethical behavior?

physics
If you have swam one lap in a swimming pool, that means you have swam from one end to the other and back. In 1.5 h, a swimmer makes exactly 77 laps in a swimming pool that is 27 m long. Determine the distance the swimmer traveled, the total displacement of the swimmer, the swi...

physics
I put 5.17km/h because it asks for it in km also i put 0 for avg velocity and that's wrong

physics
I just have the the total distance traveled. 7750

physics
If instead, the swimmer makes 77.5 laps in the same pool in 1.5 h, determine the total distance the swimmer traveled, the swimmer's total displacement, the swimmer's average velocity, and the swimmer's average speed.

physics
If you have swam one lap in a swimming pool, that means you have swam from one end to the other and back. In 1.5 h, a swimmer makes exactly 77 laps in a swimming pool that is 27 m long. Determine the distance the swimmer traveled, the total displacement of the swimmer, the swi...

physics
A rock is dropped from rest. How fast is it going after it has been falling for 8.3 s?

physics
A car starts at a position of x=6 km and has a speed of 6 mph. After 42 s the car has a speed of 60 mph. Determine the magnitude of the car's average acceleration during this time.

Chemistry - Chemical Equilibrium
Anyone, please?

Chemistry - Chemical Equilibrium
In a solution with carbon tetrachloride as the solvent, the compound VCl4 undergoes dimerization: 2VCl4 <-> V2Cl8 When 6.6834 g VCl4 is dissolved in 100.0 g of carbon tetrachloride, the freezing point is lowered by 5.97*C/ Calculate the value of the equilibrium constant ...

Trigonometry
A projectile is fired with an initial velocity of 88 ft/sec at an angle of 35° to the horizontal. Neglecting air resistance, what is the time of impact? (Round to the nearest tenth of a second.) Remember: x = (v0 cos θ)t and y = h0 + (v0sinθ)t – 16 t^2

physics
A projectile is fired with an initial velocity of 88 ft/sec at an angle of 35° to the horizontal. Neglecting air resistance, what is the time of impact? (Round to the nearest tenth of a second.) Remember: x = (v0 cos θ)t and y = h0 + (v0sinθ)t – 16 t^2

Trigonometry
Sketch the curve represented by the parametric equations x = 3 cos θ and y = 3 sin θ for 0≤θ≤π

physics
20. A projectile is fired with an initial velocity of 88 ft/sec at an angle of 35° to the horizontal. Neglecting air resistance, what is the time of impact? (Round to the nearest tenth of a second.) Remember: x = (v0 cos θ)t and y = h0 + (v0sinθ)t – 16 t^2

Trigonometry
Find the value of 3sec2.4. (Round to the nearest tenth.)

Trigonometry
Find the value of 3sec2.4. (Round to the nearest tenth.)

Trigonometry
If Cot θ = -Square Root of 15/7, use the fundamental identities to find Cosθ > 0.

English
Read the passage below and answer the question: Jack: I’ll be there in 20 minutes. I’m stopping at the store to pick up some batteries. Do you need anything? Mike: Will you buy some coffee for me? I’ll pay you back when you get here. Which statement about Mike&#...

PHYSICS
Four long, parallel conductors carry equal currents of I = 9.50 A. The current direction of the current is into the page at points A and B and out of the page at C and D. Calculate the magnitude and direction of the magnetic field at point P, located at the center of the squar...

Algebra
Solve for p 11 - 2(8+3p) = 49

maths
the probabilities of a boy passing English and Mathematics tests are x and y. What is the probability of failing both tests(a)1-(x-y)+xy(b)1-(x+y)-xy(c)1-(x+y)+xy(d)1-(x-y)-xy

Chemistry
a large amount of potassium in plant food could cause the formation of MgKPO4:6H2O along with MAPH. what would be the effect on the calculated percentage of P2O5 in question 1 if MAPH were mixed in with your precipitate? would the %P2O5 in this mixture be higher or lower than ...

science
a large amount of potassium in plant food could cause the formation of MgKPO4:6H2O along with MAPH. what would be the effect on the calculated percentage of P2O5 in question 1 if MAPH were mixed in with your precipitate? would the %P2O5 in this mixture be higher or lower than ...

Finance
Chip’s Home Brew Whiskey management forecasts that if the firm sells each bottle of Snake-Bite for $20, then the demand for the product will be 15,000 bottles per year, whereas sales will be 87 percent as high if the price is raised 17 percent. Chip’s variable cost p...

Algebra 2
tom and jerry were offered similar jobs at competing companies. sony offered tom a starting salary of $ 32,000 per year with a 7% raise at the end of each year.panasonic offered jerry a $35,000 annual starting salary with a 5% raise at the end of each year.

Algebra 2
tom and jerry were offered similar jobs at competing companies. sony offered tom a starting salary of $ 32,000 per year with a 7% raise at the end of each year.panasonic offered jerry a $35,000 annual starting salary with a 5% raise at the end of each year.

Chemistry/Env Sci
After doing the math, how do you figure out if it is oxidizing or reducing? How does the pKa apply?

Chemistry/Env Sci
a)the E0 for the reactions 2HOCl + 2H+ + 2e- → Cl2 + 2H20 and Cl2 + 2e- → Cl- are 1.63 and 1.396 volts respectively. Write the half reaction of HOCl being reduced to Cl- and develop the full pE/pH equation for this reaction. b)What is the pE of a HOCl/Cl- solution ...

Calculus
This integral does not converge using the normal (Leibniz) definition of integration. Using the identity: int(0-->inf)f(t)/(t)dt = int(0-->inf)F(p)dp, find: integral(0-->inf)(cos(at)+cos(bt))/t dt

Hvac
3 resistors of 5 ohms,15 ohms, and 30 ohms are connected in series and placed across a 50 volt batt. Find the voltage drops acroos each resistor . And find the current through each resistor

Chemistry
I am doing this assignment for mastering chemistry and It just keeps telling me that it is wrong, I have no idea what the issue is.

Chemistry
Oh it sums up the heat? I thought it was delta G(products)-Delta G(reactants) wouldn't that then be 8*-228.6 + 6*-394.4-2*(-360.5)= giving you -3426.2 KJ/Mol. Could you explain why you made the 360.5 positive? Thanks.

Chemistry
2CH3CH2CH2OH(l)+9O2(g)→6CO2(g)+8H2O(g) I have to find the delta G delta G of CH3CH2CH2OH(l)=−360.5 KJ/Mol delta G of O2(g)=0 KJ/Mol delta G of CO2(g)=−394.4 KJ/Mol delta G of H20(g)=−228.6 KJ/Mol I keep getting -3426.2 KJ/Mol but its not correct.

Chemistry
Running through I got the answer 1.97x10^-31 but it is telling me I am wrong.

Chemistry
Delta Gf= -RT*ln(K) R is 8.314 T is 298

Chemistry
delta Gf for NO(g) is 87.6 kJ/mol delta Gf for both O2 and N2 gas is zero

Chemistry
Calculate the equilibrium constant for the following reaction at room temperature, 25 ∘C: N2(g)+O2(g)→2NO(g)

Physic
Me and my friend are playing on a Ferris wheel which has Radius of 20 Meter and had an constant angular velocity of 0.2 rad/s . Then, When I'm at the very top of the Ferris wheel i'm going to drop a tennis ball( dropping without initial velocity). How far around the Fe...

Physics
A helicopter is flying in a straight line over a level field at a constant speed of 6.2 m/s and at a constant altitude of 11.3 m. A package is ejected horizontally from the helicopter with an initial velocity of 14.0 m/s relative to the helicopter, and in a direction opposite ...

FSE 120
A compartment measures 3.5 meters by 5.5 meters and is 3 meters high. A fire raises the temperature from 68of to 1500 of. If the starting pressure was 1 atmosphere, what volume is present at the elevated temperature assuming the compartment has openings to reduce pressure? For...

Calculus
Intergrate the following. y = cos(x)(2sin(x)-1)^6

statistics
"about 2 times as accurate" is the right answer

math
0.1818 is the correct one

math
0.5741 are wrong

Statistics
C. 0.0229 is the correct one

mathematic
0.1818 is the correct one (Believe)

Statistics
0.25 is the correct one

Chemical engineeing
Can someone help me with online exam ( fundamental of chemical engineering class ) ? Please eamil me ( davd_jo(at)(ya h o o )dot (com ) I'll offer money

math
Elizabeth has a box of shirts. one half of the shirts are small, 2/5 of the shirts are medium, and 5 shirts are large. How many shirts are in the box?

Stats
stupid question... A would be: 0.004096 B would be: 0.592704 C would be: 0.112896

Stats ~ Please Help
I am so lost and I have test tomorrow. Thank you to anyone who can help The probability that a person has blue eyes is 16%. Three unrelated people are selected at random. a. Find the probability that all three have blue eyes: b. Find the probability that none of the three have...

Stats
The probability that a person has blue eyes is 16%. Three unrelated people are selected at random. a. Find the probability that all three have blue eyes: b. Find the probability that none of the three have blue eyes c. Find the probability that one of the three has blue eyes

Math
Andrew has 12 coins, all dimes and nickels, and they add up to $1.00. How many nickels does he have?

Science
how many kw is an airflow of 30m³/s @130°C

science
0.0928

Algebra
A number in the modulus can't be negative, it will always be positive.

algebra
Multiply 8 by 42, So the final answer will be 336.

chem
i got 88.6 degree celcius is it right?

chem
i got 88.6 degree celcius is it right?

chem
A 6.75-g sample of gold (specific heat capacity = 0.130 J/g °C) is heated using 55.8 J of energy. If the original temperature of the gold is 25.0°C, what is its final temperature?

math
Two vectors have magnitudes of 3 units and 8 units respectively. The resultant of these two vectors has a magnitude of 8 units. What is the angle between these two vectors?

science
Expain why deep sea fishes are not crushed by the pressure of all of the water above them. I think maybe its because their density or mass is higher? Am I right?

science
deep not deepa

science
Expain why deepa sea fishes are not crushed by the pressure of all of the water above them. I think maybe its because their density or mass is higher? Am I right?

science
why is viscosity such an important property of matter?

MATH
Ans= 16(take out 4 socks from each sock color)

Physics
An airplane is flying in a horizontal circle at a speed of 104 m/s. The 88.0 kg pilot does not want the centripetal acceleration to exceed 6.15 times free-fall acceleration. Find the minimum radius of the plane’s path. The acceleration due to gravity is 9.81m/s2. An...

physics
A clear plastic tube with a diameter of 12cm and 110cm high is filled to the top with mercury. (density = 13.6 kg/m^3). There are three holes, all with a radius of 2 millimeters located 15cm from the bottom, 50cm from the bottom and 80cm from the bottom. A) What is the velocit...

physics
A liquid (ρ = 1.65 g/cm^3) flows through two horizontal sections of tubing joined end to end. In the first section the cross-sectional area is 10.0 cm^2, the flow speed is 245 cm/s, and the pressure is 1.20 105 Pa. In the second section the cross-sectional area is 2.50 cm...

Geometry and Measurement
Anna builds a rectangular prism storage container with dimensions of 8 inches by 6 inches by 12 inches. She builds a second container with a greater volume by increasing the dimensions of the rectangular prism to 16 inches by 12 inches by 24 inches. How will the volume of the ...

Geometry and Measurement
If a can of ravioli with a diameter of 2 inches and a height of 4.5 inches holds 12 ounces of ravioli, how many ounces of ravioli would a can with the same height, but double the diameter, hold?

geometry and measurement
A pool designed for lap swimming is rectangular in shape with a uniform depth of 4.5 feet. If the pool is enlarged so that it holds twice as much water, which of the following statements could be true?

Algebra 1
8.A number raised to a negative exponent is negative. Always, never , or sometimes. 7. Evaluate 1/2a^-4b^2 a = -2 and b = 4. 6. Simplify. Write in scientific notation. (9 x 10^-3)^2 Thanks to anyone who helps right away and need right answer from the people who have already ta...

Language art
Thanks ms.Sue it helped a whole lot

Language art
Just this one question please . 1.According to the MLA style, how should you format the title of a magazine article? A . In italics B. in quotation marks C. With underlining Please thankyou and anyone who has taking this please can you give me the correct answer? Thankyou than...

physics
This is my problem: A particle with a density of 0.9g/ml is suspended in a solution that has a density of 1.1g/ml. It cannot be sedimented. Using the equation that describes the movement of a particle in a centrifugal field, describe why this is true. The issue I'm having ...

Science
Yes 1. By attaching to them 2. Active Immunity 3. All of the above 4. Antibodies 5. Antigens They are all correct also I have something for you 1. According to the MLA style how should you format the title of a magazine article please I need help has any one did this I need th...

Science
Yes 1. By attaching to them 2. Active Immunity 3. All of the above 4. Antibodies 5. Antigens They are all correct

MATH HELP
I did that and it said it was wrong I need the amount after 8 years how do I do that

MATH HELP
A $2,000 deposit at an APR of 5.4% with quarterly compounding for 8 years. The amount after 8 years will be??

NEED HELP MATH HELP
!!!!!! Well you keep skipping over my question !!!!!

NEED HELP MATH HELP
$3000 invested at an APR of 5% for 7 years. If interest is compounded annually , what is the amount of money after 7 years?

NEED HELP MATH HELP
$3000 invested at an APR of 5% for 7 years. If interest is compounded annually , what is the amount of money after 7 years?

NEED MATH HELP
$3000 invested at an APR of 5% for 7 years. If interest is compounded annually , what is the amount of money after 7 years?

MATH I NEED HELP
$24,000 is invested for 3 years with an APR of 2% and daily compounding. Balance in the account after 3. years is $ ___

HELP ME MATH PLEASE
$1000 invested at an APR of 9% for 9 years. If interest is compounded annually, what is the amount of money after nine years?

I NEED MATH HELP
$24,000 is invested for 3 years with an APR of 2% and daily compounding. Balance in the account after 3. years is $ ___

MATH HELP
$1000 invested at an APR of 9% for 9 years. If interest is compounded annually, what is the amount of money after nine years?

MATH HELP PLEASE
$9000 invested at an APR of 9% for five years. In interest is compounded annually, what Ia the amount of money after 5 years?

Math Help please
5x+9=3x+37 x=

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