Tuesday
September 2, 2014

Posts by Melissa


Total # Posts: 1,113

math
There are 3 reds, 4 blues, 6 whites and 5 yellows in a bag. What is the probability that the first two you draw are both red if you do not replace the first one?
April 6, 2013

Physics
Light with a wavelength of 500 nm (5. 10-7 m) is incident upon a double slit with a separation of 0.28 mm (2.80 10-4 m). A screen is located 2.7 m from the double slit. At what distance from the center of the screen will the first bright fringe beyond the center fringe appear...
April 5, 2013

Physics
Light with a wavelength of 500 nm (5. 10-7 m) is incident upon a double slit with a separation of 0.44 mm (4.40 10-4 m). A screen is located 2.1 m from the double slit. At what distance from the center of the screen will the second dark fringe beyond the center fringe appear? ...
April 5, 2013

health
BMI is used to screen for______?
April 1, 2013

weight
researchers found that a ____ is more important and is the key to losing weight rather than a popular one.
April 1, 2013

health
for adults which ranges reflect an accurate BMI category
April 1, 2013

weight
why is having abdominal fat a serious concern
April 1, 2013

health
in order to loose weight you have to ___
April 1, 2013

health
national weight control registry
April 1, 2013

health
Why are fad diets considered unhealthy?
April 1, 2013

weight
Obesity can cause a person to develop what type of conditions?
April 1, 2013

weight
If you decided to lose weight then ____ help?
April 1, 2013

Bio Help Please!!!
1)How can you indicate that the bacteria have taken up the plasmid? 2)What is the purpose of the LB/amp(-) plate? Should there be bacterial growth on the plate? 3) Why would one compare plates LB/amp (-) and LB/amp (+)?
March 31, 2013

Bio Help Please
1)How can you indicate that the bacteria have taken up the plasmid? 2)What is the purpose of the LB/amp(-) plate? Should there be bacterial growth on the plate? 3) Why would one compare plates LB/amp (-) and LB/amp (+)?
March 30, 2013

math
y=-2x-1 how to set up to find what x is, this needs to graph as a linea equation.
March 20, 2013

Physics
A test charge of +3.00 10-6 C experiences a downward electrostatic force of 11 N when placed at a certain point in space. What are the magnitude and direction of the electric field at this point?
March 18, 2013

physics
Two identical thin wires are oriented along the x and y axes. With current on x plane going North. Current on y plane going West.Both carry the same current I, and there is no electrical contact between the wires. The points A, B, C, D are each equidistant from both wires. A: ...
March 16, 2013

Math
Use implicit differentiation to find the slope of the tangent line to the curve y/( x + 4 y) = x^4 – 4 at the point (1,-3/13)
March 14, 2013

Math
Steve, That still isn't the correct answer :(
March 14, 2013

Math
Use implicit differentiation to find the slope of the tangent line to the curve y/( x + 4 y) = x^4 – 4 at the point (1,-3/13)
March 14, 2013

Microbiology
if the original concentration of phage was markedly increased from the concentration that you received, how could you ensure that you had between 30-300 plaques on your plate? (instead of TNTC)
March 11, 2013

Statistic HELPPPPPP
A linear model can be used to describe the relationship between fuel economy(mpg) and horsepower (hp) for certain automobile models. mpg=46.868-0.0838 hp R^2=75.5% 1) Give the symbol and the value of the correlation coefficient. 2)What would the gas mileage be for a car with a...
March 11, 2013

math
A Model M3SWE mandolin has a list price of $1299.90, with a chain discount of 5/3/2. (A) What would be the trade discount amount? (B) What would be the net price?
March 4, 2013

Math
Amy Powell invested $8500 twice a year in an ordinary annuity at New York Securities for a period of 5 years at an annual interest rate of 10% compounded semiannually. Using the ordinary annuity table , calculate the total value of the annuity at the end of the 5-year period
February 27, 2013

Diff eq
y'(x)=sqrt2y(x)+7, y(4)=1 Solve the seperable diff eq
February 24, 2013

Stat Help Please
Determine which sampling method was used in each scenario. on a particular day 5 flights are selected at random and all of the passengers on these 5 flights are screened. Airport security uses a random number generator to determine the next passenger to screen.
February 23, 2013

Stat Help Please
Determine which sampling method was used in each scenario. on a particular day 5 flights are selected at random and all of the passengers on these 5 flights are screened. Airport security uses a random number generator to determine the next passenger to screen.
February 23, 2013

history
Who came to power in China, instituting a Communist regime that would bring great suffering to the nation's people
February 22, 2013

Global History
How were the Mongols able to conquer so much territory so rapidly?
February 20, 2013

statistics
A television program director has 14 shows available for Monday night and 5 shows must be chosen. How many different possible combinations are there?
February 15, 2013

math
a wheel makes 8 1/10 revolutions per minute if it rotates for 85 mins. how many revolutions will it make
February 10, 2013

Math
The Midtown Middle School cheerleaders earned $175 at a car wash. If this amount is 25% of the cost of a new set of uniforms, what is the total cost fora a set of uniforms? Explain your reasoning.
February 7, 2013

general chemistry
so to get volume, you do v=(1.33)*3.14*99e-7^3????
February 6, 2013

general chemistry
the radius of a chlorine atom is 99 pm and its mass is 5.89 X 10^-23 grams what is the density
February 6, 2013

chemistry
inorganic chemistry
February 5, 2013

chemistry
I am supposed to add NH4 and C2H3O2 together and write the new ion. Would it be NH7C2O2? do I add the hydrogens together and were would it go in the order then?
February 5, 2013

Sociology HELPPPP
How does deviance and crime function both for and against society? Be sure to include social control in your answer group.
February 1, 2013

Vector Calculus
An airplane is traveling in the direction 20degrees west of north at 700 km/hr. Find the component form of velocity of the airplane assuming that the positive x-axis represents due east and the positive y-axis represents due north.
January 26, 2013

american government
judicial review is the power of the american courts to:
January 21, 2013

algebra
Determine which of the flowing points lie on the line given by the equation 3x+6y=12
December 16, 2012

Physics
A sound wave is traveling in warm air when it hits a layer of cold, dense air. If the sound wave hits the cold air interface at an angle of 23 degree angle, what is the angle of refraction? Assume that the cold air temperature is -10 degrees C and the warm air temperature is +...
December 13, 2012

physics
A particular guitar string is supposed to vibrate at 210Hz , but it is measured to vibrate at 220Hz By what percent should the tension in the string be changed to correct the frequency?
December 13, 2012

Physics
Assuming the fluid has a density of 1.00 (g/cm^) at what height h should the bottle be placed so the liquid pressure is 38mm-Hg ? B.At what height h should the bottle be placed so the liquid pressure is 460mm-H_2O ? C.If the blood pressure is 18 {mm-Hg} above atmospheric ...
December 11, 2012

Physics
Determine the minimum gauge pressure needed in the water pipe leading into a building if water is to come out of a faucet on the twelfth floor, 40m above that pipe. Pa?
December 11, 2012

Physics
A 7.9cm diameter horizontal pipe gradually narrows to 5.9cm . When water flows through this pipe at a certain rate, the gauge pressure in these two sections is 31.0kPa and 21.0kPa , respectively. What is the volume rate of flow? in m3/s please help!
December 11, 2012

Biology
The half-life of Carbon-14 is 5730 years. What is the age of a fossil containing 1/16 the amount of Carbon-14 of living organisms? Explain your calculation.
December 9, 2012

Physics
a child twirls a yo-yo about in a horizontal circle. The yo-yo has a mass of 0.20 kg and is attached to a string 0.8 m long. what is the velocity of the yo-yo? thanks!
December 6, 2012

physics
A 160kg horizontal beam is supported at each end. A 330kg piano rests a quarter of the way from one end. What is the vertical force on each of the supports?
November 27, 2012

Physics
SOrry! the units are 11500rmp 1.52 m*N 6.07kg 0.0750m
November 27, 2012

Physics
A centrifuge rotor rotating at 11500 is shut off and is eventually brought uniformly to rest by a frictional torque of 1.52 . a.If the mass of the rotor is 6.07 and it can be approximated as a solid cylinder of radius 0.0750 , through how many revolutions will the rotor turn ...
November 27, 2012

Algerbra
Combine and show all work please 3/2y+2/y-1-2/y
November 24, 2012

Algerbra
simplify a-1/a ___________ 2+3/2+1/a^2
November 24, 2012

math
Use the tangent line approximation to approximate the value of ln(1.004)
November 19, 2012

Chemistry
thanks! But it turns out I was over thinking it!
November 19, 2012

Chemistry
In this lab experiment you will make 100.0 mL of a 0.100 M solution of Co(NO3)2. However you must calculate the number of moles of compound that will be needed (moles= Molarity x Liters).Then calculate the mass of Co(NO3)2 that will need to be weighed out (mass= moles x molar ...
November 19, 2012

math
a small business loan in the amount of 50,000 with an interest rate of 9% that compounds monthly for 7 years what would my monthly payment be
November 12, 2012

math
State a trigonometric ratio that is equivalent to each of the following trigonometric ratios Sin 3pie/10 Cos 6pie/7
November 10, 2012

Physics
A hydraulic lift is used to jack a 780 kg car 15 cm off the floor. The diameter of the output piston is 15 cm, and the input force is 160 N. a)What is the area of the input piston (in m^2)? b)What is the work done in lifting the car 15 cm? c)If the input piston moves 13 cm in ...
November 10, 2012

Physics
Calculate the true mass (in vacuum) of a piece of aluminum whose apparent mass is 1.6000kg when weighed in air.
November 10, 2012

physics
A newspaper carrier on delivery route travels 200.-m South-West and 300.-m West. What is the direction of the displacement
November 8, 2012

physics
A newspaper carrier on delivery route travels 200.-m South-West and 300.-m West. What is the magnitude of the displacement?
November 8, 2012

accounting
Analyze and record, in the form of T Accounts, Mr. James' transactions: Jan 1: Amount invested in the business $10,000 Jan 7: Bought equipment for $500 Jan 9: Bought office furniture with $2,000 cash Jan 10: Bought materials with $2,000 cash Jan 17: Sold part of equipment...
November 6, 2012

Chemistry
convert 458166 atoms of H20 to moles
November 6, 2012

pre algebra
A woman who is 5feet 4 inches cast a shadow that is 6 feet tall. How long of a shadow would be cast by a man who is 6 feet 8 inches tall
November 5, 2012

Algerbra
George pays a flat amount for the first 200 minutes plus so much for each additional minute on his cellular phone each month. Last month it cost him $33.78 for 244 minutes of use. The previous month it cost $38.94 for 287 minutes of use. What are the flat rate and per minute ...
November 2, 2012

Math
Jared can paddle his canoe 1 mile upstream in 1 hour, but it takes only a half hour to paddle back the same distance. Find the speed of water. (Hint: d=rt and the rate or canoe speed, depending on which way he is going.)
November 2, 2012

Calc
Find all solutions of the equation (sec(x))^2−2=0 The answer is A+Bk where k is any integer and 0<A<pi/2 Find: A= pi/4? B=??
October 22, 2012

English
About what?
October 22, 2012

Math
Find all solutions of the equation (sec(x))^2−2=0 The answer is A+Bk where k is any integer and 0<A<pi/2 Find: A= pi/4? B=??
October 22, 2012

Math
Show how to make one addend a ten. Complete the new addition sentence. 38 + 25=? ---- + ---- =
October 15, 2012

algebra
2st squared -s squared. S=4 t=8
October 15, 2012

geometry
If the endpoints of the diameter of a circle are (3, 1) and (6, 5), find the length of the diameter.
October 14, 2012

o Chem
a sample consisting of 1-bromopropane and 1-chloropropane isinjected into a gas chromatograph quipped with a nonpolar column.which compound has the shorter retention time? Explaine the answer. b.if the same sample were run several days later with theconditions as nearly the ...
October 9, 2012

math
The function f(x) = ax^3-x^2+bx-24 has three factors. Two of these factors are x-2 and x+4. Determine the values of a and b, and then determine the other factor
October 7, 2012

math
An open topped box can be created by cutting congruent squares from each of the 4 corners of a piece of cardboard that has dimensions of 20cm by 30cm and folding up the sides. Determine the dimensions of the squares that must be cut to create a box with a volume of 1008cm^3
October 7, 2012

math
An open box is made from a rectangular piece of cardboard, with dimensions of 24 cm by 30 cm, by cutting congruent squares from each corner and folding up the sides. Determine the dimensions of the squares to be cut to create a box with a volume of 1040 cm ^3
October 6, 2012

world geography
economics status, social status.
October 4, 2012

world geography
What processes cause changes in settlement patterns?
October 4, 2012

world Geography
Culture, age, money.
October 4, 2012

world Geography
What social factors determine population trends and demographics of a region?
October 4, 2012

World Geography
What human and physical features influence the size and distribution of settlements?
October 4, 2012

World Geography
Work, distance, stores
October 4, 2012

World Geography
What economic factors determine population trends and demographics of a region?
October 4, 2012

World Geography
The economy if its bad..not able to survive there, social status.
October 4, 2012

World Geography
What processes cause changes in settlement patterns?
October 4, 2012

World Geography
Push factors are those that encourage a migrant to leave his place of residence. Includes cost of living, personal safety, environmental catastrophes or more minor issues suc as weather and climate. Pull factors are those that attract a migrant to a country, such as the ...
October 4, 2012

World Geography
How do push and full factors and physical geography affect immigration?
October 4, 2012

math
The volume of a rectangular box is (x^3+6x^2+11x+6) cm^3. The box is (x+3) cm long and (x+2) cm wide . How high is the box
October 2, 2012

math
Consider the function f(x)=x^3+4x^2+kx-4. The remainder from f(x)/(x+2) is twice the remainder from f(x) / (x-2). Determine the value of k
October 2, 2012

math
The function f(x)=ax^3-x^3+bx-24 has three factors. Two of these factors are x-2 and x+4. Determine the values of a and b , and then determine the other factor
October 2, 2012

math
Factor each expression (X+5)^3-(2x+1)^3
October 1, 2012

math
Factor each expression (X+5)^3-(2x+1)^3
October 1, 2012

World History
In the question "Why the haitian revolution probably truer to itself than it's French or American counterparts?" Is it referring to how the Haitian revolution stayed truer to their cause in revolution because they gave everyone equal rights, while american and ...
October 1, 2012

math
Each dividend was divided by another polynomial, resulting in the given quotient and remainder. Find the divisor Divided:5x^3+x^2+3 ,quotient:5x^2-14x+42, remainder:-123
September 28, 2012

health
why is having excessive abdominal fat a serious concern
September 20, 2012

O Chem
Comment on the suitability of running a infared spectrum under these conditions A KBr pellet is prepared with a compound that melts at 200 C same question but at 30 C
September 18, 2012

O chem
comment on suitability of running infared spectrum under the following conditions: A neat spectrum of liquid with a boiling point of 150 C is determined with salt plates. and same question but at 35 C
September 18, 2012

math
the final grade for a particular course is calculated by dividing total points earned by total points available. There are 6 quizzes worth 15 points each, and 2 exams worth 50 points each. If a student earns 67 points total on the quizzes and wants to get at least 86% in the ...
September 8, 2012

math
Evaluate f(x) = x^2+3-4 For f(1/4)
September 4, 2012

math
156 / 55 - how do i show my work for long division?
August 30, 2012

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