Tuesday
September 1, 2015

Posts by mary


Total # Posts: 3,448

Math
A blueprints scale of 1 cm=5m. what are the dimensions of a function room that measures 9cm by 7cm on the blueprint?
August 26, 2015

Math
The greatest place value is hundred thousand. The digit in the tens place is 5.the remaining digit ate 2, 3, 8 and 7. One of the digit has a value of 30,000. One of the digit had a value of 800. The value of the digit in the thousands place is 10 times greater than this. There...
August 25, 2015

math
give the reason to justify each step a. 4c+3(2+c)=4c+6+3c b. =4c+3c+6 c. =(4c+3c)+6 d. =(4+3)c+6 e =7c+6
August 19, 2015

Math
The greatest place value is hundred thousands. *the digit in the tens place is 5. *the remaining digit are 2,3,8, and 7 *one of the digit has value of 300,000 *one of the digits has a value of 800. The value of the digit in the thousands place is 10 times greater than this. * ...
August 10, 2015

statistics and probability
Solve for y . -2(y-3)= 5y-29 Simplify your answer as much as possible
August 10, 2015

Physics
Suppose you wanted to be able to see astronauts on the moon. What is the smallest diameter of the objective lens required to resolve a 0.61 m object on the moon?
August 7, 2015

Physics
Which one of the following actions would make the maxima in the interference pattern from a grating move closer together? Decreasing the frequency of the laser. Increasing the frequency of the laser. Increasing the number of lines per length. Increasing the wavelength of the ...
August 7, 2015

algebra
: a student scored 73 out of 100 on a test. If the maximum score on the next text is also 100 points, what score does the student need to maintain an average of 81?
August 6, 2015

Algebra
True or False. If a line L1 has equation y = mx + b, where m and b are constants with m ‚ 0,then an equation of a line L2 perpendicular to L1 has the form , where C is a constant. L2: y= -1x +C
August 4, 2015

math
Sam bought a new car for $26,500. The car depreciates approximately 13% of its value each year. a) What is the decay factor for the value of this car? b) Write an equation to model the decay value of this car?
August 2, 2015

english
that sounds good !
July 23, 2015

Physics
Thanks
July 21, 2015

Physics
A solid cylinder rolls down an incline plane without slipping. If the center of mass of the cylinder has a linear acceleration of 2.67 m/s2, what is the angle of the incline to the horizontal?
July 21, 2015

physics
1.93m
July 9, 2015

physics
a. 2.12 m b. 2.07 m c. 1.98 m d. 2.20 m e. 1.93 m which one ?
July 9, 2015

physics
A 30.0-kg child sits on one end of a long uniform beam having a mass of 20.0 kg, and a 43.0-kg child sits on the other end. The beam balances when a fulcrum is placed below the beam a distance of 1.10 m from the 30.0-kg child. How long is the beam?
July 9, 2015

Physics
Never mind I got it
July 9, 2015

Physics
A child (48 kg) stands on the edge of a stationary merry-go-round (uniform disk of radius 1.2 m and mass 50 kg). The child jumps off at 1.0 m/s with respect to the ground in the direction tangential to the edge. Find the angular speed of the merry-go-round after the jump. ...
July 9, 2015

math
list all the 3-digit number that fit these clues
July 9, 2015

physics
Suppose you moved a box across a rough horizontal surface with a 50 N force over a displacement of 10 m. If the frictional force at the interface was 10 N, how much work was done to the box?
July 7, 2015

statistics
A study of 600 college students taking statistics revealed that 54 students received the grade of A. Typically 10% of the class gets an A. The difference between this gourp of students and the expected value is not significant at the 0.05 level. What does this mean?
June 23, 2015

Math (Need help Urgent)
1. Fireworks are to be launched from a platform at the base of a hill. Using the top of the platform as the origin and taking some measurements, it was determined that the cross-section of the slope of one side of the hill is y=4x-12 . If the path of the fireworks is y= -x^2+...
June 18, 2015

Math
Nuts worth $3 per lb are to be mixed with 8 lb of nuts worth $4.25 per lb to obtain a mixture that will be sold for $4 per lb. How many pounds of the $3 nuts should be used?
June 17, 2015

MATH
A 95% confidence interval for the mean of a normal population is found to be 17.6 <h 23.6 (h looking symbol couldn't find on keyboard ) what is the margin of error ? A 2 B 2.7 C 3 D 4 My answer is C. Am I right? But I think it could also be A.
June 16, 2015

social studies
i know
June 12, 2015

social studies
what is that Bobpursley i was told not to trust wikipedia
June 12, 2015

social studies
thxs
June 12, 2015

social studies
What is unusual about how Brazil gained independence? Need Help A.S.A.P
June 12, 2015

physics
The effective speed of the student while going upstream (i.e , the velocity of the student with respect to the river ) is 0.75 m/s whereas the same while returning downstream is 1.45 m/s . So , total time taken = 1000/0.75 + 1000/1.45 = 2023 seconds = 33 minutes 43 seconds . ...
June 11, 2015

Social Studies
thxs
June 11, 2015

Statistics
Thank you!
May 30, 2015

Statistics
12.34 Screening job applicants. A company retains a psychologist to assess whether job applicants are suited for assembly-line work. The psychologist classifies applicants as one of A (well suited), B (marginal), or C (not suited). The company is concerned about the event D ...
May 30, 2015

math
Half of Sarah's wire is equal to 2/5 of Daniels. Chris has 3 times as much as Sarah. In all, their wire measures 6 ft. How long is Sarah's wire in feet?
May 27, 2015

algebra
given the following functions, find the function values of g(x)=5, find g(-4)
May 26, 2015

Math
Sharon made a scale drawing of a triangular park. The coordinates for the vertices of the park are: (– 10, 5) (15, 5) (10, 12) Her scale is 1 unit = 1 meter. What is the area of the triangular park in square meters? How do you find the answer?
May 21, 2015

life orientation assignment
Analse the above statement . illustrate your answer by referring to any three media form over the same two week period
May 21, 2015

statistics
suppose i guess that the average income of a family is $40,000. Display a test of the hypothesis that the mean of the numerical variable equals the value of the guess given versus the alternative that it does not equal this value. then what would be my decision at the 5% ...
May 17, 2015

science @elena please help
D. photosynthetic cyanobacteria and fungi form a mutualistic associatio in lichen
May 13, 2015

algebra
where does the 1 come from the 1.14? I have my final today.
May 7, 2015

algebra
An advertisement for a steel-belted radial tire states that this tire delivers 14% better gas mileage. If the present gas mileage is 25.5 mpg, what mileage would you expect if you purchased these tires? Round your answer to the nearest tenth of a mile per gallon. I know the ...
May 7, 2015

Algebra
Ms Sue, can you write it out, I'm really bad at this. Thanks.
May 6, 2015

Algebra
Suppose you wish to make a scale drawing of your living room, which measures 18 ft by 23 ft. If the shorter side of the drawing is 6 in., how long is the longer side of the scale drawing?
May 6, 2015

science
What is the difference between specific heat and heat capacity? If you heat 500g of H2O initially at 8C in a 1000 W microwave with 80% efficiency for 2 minutes, what will the final temperature be?
May 5, 2015

math
3x3−27x2+60x
May 1, 2015

PHYSICS
A particle (mass = 5.0 g, charge = 40 mC) moves in a region of space where the electric field is uniform and is given by Ex = 2.5 N/C, Ey = Ez = 0. If the velocity of the particle at t = 0 is given by vy = 50 m/s, vx = vz = 0, what is the speed of the particle at t = 2.0 s?
April 29, 2015

chemistry
A sample of potassium hydrogen oxalate, KHC2O4, weighing 0.717 g, was dissolved in water and titrated with 18.47 mL of an NaOH solution. Calculate the molarity of the NaOH solution.
April 27, 2015

integral
3xdx/√(4+x) need help!!!!
April 26, 2015

statistics
assume that the odor threshold for untrained noses is normal with a standard deviation of 7. the odor thresholds for these 10 noses are: 31, 31, 43, 36, 23, 34, 32, 30, 20 and 24. is there evidence that the mean threshold for untrained tasters is greater than 25 micrograms per...
April 24, 2015

statistics
would the null hypothesis that the 2000 mean hourly earnings of all workers was $16 be rejected at the 10% significance level in favor of the two-sided alternative? What about the null hypothesis that the mean was $15?
April 24, 2015

Research Question for English
thank you !
April 22, 2015

Research Question for English
How does a person inherit intelligence from someone else?
April 22, 2015

English Research
What are some things you can inherit from your parents?
April 22, 2015

Math
Jill bought so e carrots and apples for $24.80. A carrot and an apple cost $.90 altogether. She bought more carrots than apples. The cost of the extra number of carrots was $6.80. How many apples did she buy?
April 20, 2015

non profit Accounting
The mayor of a large city approaches a group of citizens and suggests that they form an organization to provide social, educational, and recreational programs for local youth. The group agrees and forms an entity called the Community Youth Organization (CYO). The group also ...
April 19, 2015

statistics
A consumer advocacy group claims that the mean amount of juice in a 16 ounce bottled drink is not 16 ounces, as stated by the bottler. Determine the conclusion of the hypothesis test assuming that the results of the sampling lead to rejection of the null hypothesis. A. ...
April 18, 2015

statistics
A researcher wishes to estimate the mean amount of money spent per month on food by households in a certain neighborhood. She desires a margin of error of $30. Past studies suggest that a population standard deviation of $248 is reasonable. Estimate the minimum sample size ...
April 18, 2015

geometry
with 2 pentagons (A, B, C, D, E) & F, G, H, I, J.) start with A in lower left corner. Same with F. AE=10, BC=8: FG=9, FJ=15. There are diagonal line CE & HJ. x= AB, Y=GH. Find the scale factor of ABCDE to FGHIJ; need value of x & y; perimeter of ABCDE is 38, what is perimeter ...
April 12, 2015

geometry
a forest ranger spots a fire from 28-foot tower. the angle of depression from the tower to the fire is 11 degre to the nearest foot, how far is the fire from the base of the tower
April 10, 2015

math
square root of (24)(72)
March 30, 2015

math
square 0f (24)(72)
March 30, 2015

math
nevermind, forgot to square it, figured it out
March 27, 2015

math
the world's largest cube puzzle in Knoxville measures 6 feet on each side. The scale factor between a standard cube puzzle and largest is 1/24. Find the surface area and volume of the standard cube puzzle. Answer is 0.375ft^2/0.015625ft^3 Not sure how they figured it out i...
March 27, 2015

math
If x unit of a product cost C dollars to manufacture and earn revenue of R dollars, the value of X where the expression for C and R are equal is called break-even quantity, the number of units that produce zero profit. Find the break-even quantity when c=14X+48000 and R=18X
March 25, 2015

Algebra 2
Consider 2 dice being rolled together. Calculate the probability of rolling an even sum
March 25, 2015

math(Discrete)
Determine whether the statement ∀x ∈ Z, ∃y, z ∈ Z[x = 5y + 7z] is true or false. Explain.
March 19, 2015

Managerial Accounting
Joanna Pauly was delighted to see that her ROI figures had increased for the third straight year. She was sure that her campaign to lower costs and use machinery more efficiently (en- abling her factories to sell several older machines) was the reason why. Joanna ...
March 14, 2015

lifes orientation
To what extent can intrapersonal conflict affect choice of a career
March 8, 2015

chemistry
How many grams of water will be produced by the reaction of 7.00g NH3 of 9.00g of NO?
March 5, 2015

chemistry
how do i find a name and formula for a combination of an anion and a cation? ex: Na2CO3 + Ba(NO3)2
March 5, 2015

chemistry
how do i find a name and formula for a combination of an anion and a cation? ex: Na2CO3 + Ba(NO3)2 please help!
March 5, 2015

physics
A child on a beach tosses a walnut straight upward. it reaches the peak of its trajectory and then falls straight downward retracing its path when a hungry seagull grabs the walnut 10.1m above the release point at a time of 1.6s after it was thrown. find the initial velocity ...
March 5, 2015

Physics
A 100kg object moving at 20 m/s comes to a stop over distance of 40 m. What is the coefficient of dynamic fiction between the object and the ground? I tried to work it out with the formula, but I'm really confused. Please help.
March 2, 2015

geometry
The diameter and height of this cylinder are equal to the side length, S, of the cube in which the cylinder is inscribed. What is the expression for the cylinder's volume?
March 2, 2015

geometry
A cylinder has a height of 16 cm and a radius of 5 cm. A cone has a height of 12 cm and a radius of 4 cm. If the cone is placed inside the cylinder as shown, what is the volume of the air space surrounding the cone inside the cylinder? (Use 3.14 as an approximation of ð.)
March 2, 2015

math
jake has 6 cards. 4 of his cards are red and 2 cards are blue. Alicia also has 6 cards. half of her cards are red. who has more red cards.
February 26, 2015

Math
A library has fiction and nonfiction books. 2/5 of the library books are fiction. Of these 1/5 are mysteries. 1/3 of the nonfiction books are mysteries. What fraction of all the books are mysteries?
February 26, 2015

macroeconomics
GDP rises from $4 trillion in 2006, the base year, to $5 trillion in 2012. The GDP deflator in 2012 is 120. Find real GDP in 2012. Find the percentage increase in real GDP between 2006 and 2012.
February 25, 2015

Math
If 8 students eat apples and 12 students eat bananas, how many students eat apples or bananas?
February 23, 2015

math
Problem 6-1 Bank Reconciliation The following information is available to assist you in preparing a bank reconciliation for Calico Corners on May 31, 2012: a. The balance on the May 31, 2012, bank statement is $8,432.11. b. Not included on the bank statement is a $1,250 ...
February 22, 2015

Physics
The spring on a popgun obeys Hooke's law and requires a force of 220 N to compress it 12.0 cm to its cocked position. How much energy is stores in the cocked spring?
February 22, 2015

World history
How was life before/after the telephone was invented in Brazil?
February 18, 2015

social problems
. Which of the following social structures is NOT reflected in the act of a wife adopting her husband’s name and foregoing her father’s (her maiden) name? (Points : 1) Patriarchy Heteronormativity Hierarchy Classism
February 12, 2015

Math
Makala made 32 of 60 free throws. What is the experimental probability that Makala will not make the next free throw she attempts. Would it be 8 out of 15 and do u divide
February 9, 2015

3 rd grade Math
this my sons home work. I myself didnt understand . please help me
February 9, 2015

3 rd grade Math
how are perimeter and area? When building your club house did you have a more difficult time finding the perimeter or area? why?
February 9, 2015

Chemistry
How many joules of energy are released when 45.0g of water cools from 18.0C to 70.0C? Specific heat of water is 4.184J/gC.
February 8, 2015

Chemistry
If you had a mixture of sodium chloride and sodium bromide, could you use its conductance to determine the concentration of each solute? Explain.
February 1, 2015

Physics
Particles of charge +65, +48, and −95 μC are placed in a line. The center one is L = 60cm from each of the others.Calculate the net force on the left charge due to the other two.
January 31, 2015

College interview
Hi! I was just wondering if one of the teachers could tell me whether or not it is unprofessional to wear colored contact lenses to a college interview? The colors aren't drastic colors but they are contact lenses nonetheless. thanks!
January 30, 2015

chemistry
I have to calculate the vapor pressure of water at 25.0 degrees celicus. The heat of vaporization of water is 40.65 kj/mol and the vapor pressure of water is 92.7 Torr at 50 degrees celcius. I know I should use log10 P=A- B/C+T but I don't know how to work it out.
January 30, 2015

combination probability
Thank you!
January 24, 2015

combination probability
I am looking for the number of ways you can draw 4 marbles to have an equal number of red and white marbles after the draw. I was using combination probability set up as 6C2*7C2 = 315 but this doesn't include the probability of the 5 blue marbles. I'm not sure how to ...
January 24, 2015

combination probability
A bag contains 6 red, 7 white and 5 blue marbles, how many ways can four marbles be picked where there are an equal number of red and white marbles? Is it 315 ways?
January 24, 2015

math
if I save 3200 for 40 years with 9% interest rate how much will I have saved
January 24, 2015

English Riddle
THANK YOU!!
January 20, 2015

English Riddle
my hands constitute my career. when i was young, i practiced for hours to master the great composers. I decided long ago that "tickling the ivories" would be the key to my success. Who am I? Please help! I came up with "piano" but im not sure...
January 20, 2015

SCIENCE
IF THERE WAS A ZERO CHANGE IN EARTHS ECCENTRICTY, HOW MIGHT THAT AFFECT THE POSSIBILTY OF AN ICE AGE/
January 20, 2015

math
the average annual rainfall for a town is 43.2 inches. I know the monthly rainfall has to be 3.6 inches. the difference of a given month's rainfall from the average monthly rainfall is called the deviation. what is the deviation for each month shown? may 2 3/5 inches, june...
January 17, 2015

math
earned $296.00 and worked for $8.00 per hour. how many hours did she work?
January 12, 2015

History
Legacies (Short and long term impacts/consequences) in history regarding Nelson Mandela
January 11, 2015

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