Monday
September 22, 2014

# Posts by sammy

Total # Posts: 454

ecology
The Nile perch population explosion has been accompanied by: a decrease in the dissolved oxygen in the shallowest portions of Lake Victoria. a decrease in the dissolved oxygen in the deepest portions of Lake Victoria. an increase in the dissolved oxygen in the deepest portions...
September 21, 2014

simple interest
Jimmy invests 15,000 coins in a bank and earns simple interest. After 2 years he withdraws all his money from the bank .If the amount that he receives is 17,000 coins ,calculate. (a)the interest received (b)the rate at which bank pays interest.
September 20, 2014

Physics
An object has a initial velocity of 10 m/s in the positive x direction. Under a constant acceleration it stops after undergoing a displacement of 148.3 m in the positive x direction. Because it is still under the same acceleration it then travels back in the negative in the x ...
September 4, 2014

Math
A student goes through seven class periods in school. Each period lasts 55 minutes. How many hours does he spend in class per week?
August 29, 2014

Excel Macro Question
Question has been solved. Please remove if possible!
May 20, 2014

physic angular momentum and torque
What is the angular momentum of a figure skater spinning at 2.7rev/s with arms in close to her body, assuming her to be a uniform cylinder with a height of 1.6m , a radius of 14cm , and a mass of 50kg How much torque is required to slow her to a stop in 4.4s , assuming she ...
March 29, 2014

Physics
The Lamborghini Murcielago can accelerate from 0 to 27.8 m/s (100 km/hr or 62.2 mi/hr) in a time of 3.40 seconds. How fast will the car be traveling (m/s) after 5.1 seconds.
February 22, 2014

Geometry.
can you imply something if you are given that two altitudes intersect in a triangle?
December 19, 2013

Geometry.
prove that the distance between any two points inside triangle abc is not greater than half the perimeter of triangle abc my teacher said to try doing this proof by contradiction. can someone please help??
December 19, 2013

Social Studies
i don a lot of research but yes they won
December 17, 2013

science
Why are liners laid down at the bottom of a landfill before waste in the landfill?
December 11, 2013

science
That is what it said in the book. What is the right answer?
December 11, 2013

science
No wait it is A
December 11, 2013

science
which of the following would be most likely to lead to increase biodiversity? A.clear-cutting B.oil drilling C.national park planning D.farming
December 11, 2013

Early Childhood Education
A disadvantage of large group times is: A. language is enjoyed as a group. B. children develop an understanding of being a group member. C. the difficulty of having intimate conversations. D. they are often seen as sharing times. In a study about kindergarten readiness, which ...
December 11, 2013

Algebra
Thank guys :)
December 5, 2013

Algebra
What are the zeroes of y = x2 – 2x – 15? –3, –5 3, 5 –3, 5 3, –5
December 5, 2013

Math
1. What is the vertex of each of these parabolas? a. y = (x –7)2 +4 b. y = 3(x + 7)2 – 4
November 13, 2013

Math HELP
If log a = 3, what is log a4?
November 4, 2013

math
Assume you have \$1,000 and find a place to invest it that will give you 5% compounded annually. a. How long will it take your investment to be worth \$1,500? b. Is it worth your while to run around and find another place which will give you 5% interest compounded daily? Explain...
November 4, 2013

MatH HELP
Kensin longs to own a Maserati. He can afford \$40,000 for a car. If this year’s model sells for \$135,000 and will depreciate at 10% a year, in how many years will he be able to afford this model Maserati?
November 4, 2013

Alegbra Help
Find the domain of: 6/(9-4x) 7/(x^2-8x) (x^2+9x)/(x^3-13x^2+40x)
October 26, 2013

MATH HELP
Derrick is investing \$1,000 at 5% interest and Anna is investing \$750 at 7% interest. Both interest rates are compounded annually. When will they have the same amount saved? (Hint: 1.05t/1.07t =(1.05/1.07)t )
October 24, 2013

Math HELP
When a Superball bounces it is claimed that the height of any bounce is 90% of the height of the last bounce. If a Superball is dropped out of a second story window at the height of 200 feet. On which bounce would it bounce just one foot?
October 21, 2013

MATH HELP
Log 1000 =a Log a =1 Log a = -1 What is the vaule of A
October 21, 2013

math
find the product to (2x+4y)(8x+3y)
October 16, 2013

Math PLEASE HELP ME!!
How would you solve this inequality -3(n+8)<-17-3n
September 30, 2013

Math
How would you solve this inequality -3(n+8)<-17-3n
September 30, 2013

Math
A room contains 8 crates. Each crate contains 8 boxes. Each box contains 8 bags. Each bag contains 8 balloons. a) How many balloons are in the room? b) Express the numbers of balloons as a power. Identify the base and the exponent. please help i understand a) that u have to ...
September 9, 2013

algebra 1A
What's 35ab/105bc simplified
September 3, 2013

physics
A spring lies on a horizontal table, and the left end of the spring is attached to a wall. The other end is connected to a box. The box is pulled to the right, stretching the spring. Static friction exists between the box and the table, so when the spring is stretched only by ...
July 16, 2013

College Physics
Sorry, I meant 250 not 225. Either way its still not the correct answer..
July 13, 2013

College Physics
A 7 kg mass hangs on a 10 meter long weightless cord. To the nearest cm, what should the new length of the pendulum be in order that the new frequency be 1.8 times its current value? The correct answer is 309 but I got 250. Heres what I did.. (1/2pi)(sqrt g/L2) = (2/2pi)(sqrt ...
July 13, 2013

College Physics
7 Moles of a gas initially at temperature 300 K is compressed adiabatically from a volume of 1000 cm3 to a volume of 316 cm3.  To the nearest tenth of a kJ what is the work done by the piston? (It is a monatomic ideal gas.) I have W = (3/2)nRT1(V1^(gamma-1) V2^(1-gamma) ...
July 13, 2013

physics
A 950-kg race car can drive around an unbanked turn at a maximum speed of 46 m/s without slipping. The turn has a radius of 120 m. Air flowing over the car's wing exerts a downward-pointing force (called the downforce) of 12000 N on the car. (a) What is the coefficient of ...
July 1, 2013

Trigonometric Functions! (Ferris Wheel)
Thank you very much Steve!
May 21, 2013

Trigonometric Functions! (Ferris Wheel)
The Ferris wheel at a carnival has a diameter of 18m and descends to 2m above the ground at its lowest point. Assume that a rider enters a car at this point and rides the wheel for two revolutions My main problem is how to get the phase shift. (The answer says its 270 degrees)
May 21, 2013

Periodic Function (Trigonometric Fuctions)
A lighthouse beacon rotates through 360 degrees every 12 seconds, it is located 100 m off the shore of an island with a coastline of steep cliffs running north and south. As the light beam sweeps clockwise, starting from the north (direction of 0 degrees), it strikes some part...
May 20, 2013

math
Will someone please help me with this problem. Simplify the expression, if possible. log 1.
May 5, 2013

math
Any of the ten digits 0 through 9 may be used in a 6-digit code, but no digit may be used more than once. If the first two digits are 1 and 7, what is the largest possible average of all 6 digits? a)4 b)6 c)6.5 d) 7
April 18, 2013

English
Thank you This what I have but I'm not sure if it's correct. 1. A ; 2. C ;
April 16, 2013

English
I need help with these questions. Which of the following options best demonstrates sentence fluency? A. The city looked beautiful in that it was lit by the sun while I was walking down the street. B. Walking down the street in the sunshine, the city looked beautiful. C. The ...
April 16, 2013

math
Solve negative five-ninths equals negative two v minus one-third for v. choices four-ninths negative one-eighteenth one-ninth five-sixths
April 7, 2013

Chemeistry
when 4.50 g of fe2o3 is reduced with excess h2 in a furnace, 2.6 g of iron metal is recovered. What is the percent yield when molar mass of Fe2O3 is 159.7
March 25, 2013

Pre-Algebra
Can U Just Check My Answer Please! Thank You Guys :D Complete the sentence below. Scatter plots are used to look for a pattern of association, or trend, between ____________ A) one set of values. B) two sets of values. C) three sets of values. D) four sets of values. My Answer...
March 25, 2013

Pre-Algebra
Thank You So Much Linzy :)
March 25, 2013

Pre-Algebra
Can U Just Check My Answer Please! Thank You Guys :D Complete the sentence below. Scatter plots are used to look for a pattern of association, or trend, between ____________ A) one set of values. B) two sets of values. C) three sets of values. D) four sets of values. My Answer...
March 25, 2013

social studies
OK,I will thank you so much Ms. Sue !!!!! :D !!!! HAVE A NICE DAY :D
March 11, 2013

social studies
Compare and contrast how the United States and Canada achieved independence. Why do you think the United States has 10 times more people than Canada? Explain one way that ethnic groups in the U.S. and Canada are similar and one way that they are different.
March 11, 2013

Math
Find the area for a triangle: base 14 cm, height 5.5 cm. 19.5 cm² 77 cm² 38.5 cm² 770 cm²
February 25, 2013

math
I only need help with B. I have already figured out A and C
February 18, 2013

math
q = 350 − 5p (a) Enter the equation for revenue R as a function of price p. R = (b) What is the (instantaneous) rate of change of revenue with respect to price when the price is \$6? (c) At what price is the derivative of revenue with respect to price exactly zero?
February 18, 2013

languagge/french
thank you
February 17, 2013

languagge/french
i saw it on google but for the other sports i don't seem to find the right vocbulary
February 17, 2013

languagge/french
what are some winter sports written in french like for example skiing is "ski du faire". please help
February 17, 2013

ENG1511
This is great news indeed, I can't believe I made it!
February 15, 2013

Calculus
Given a function f(x)=sqrt(100-x^2) Evaluate the integral xsqrt(100-x^2dx) for the interval (0,10)
February 10, 2013

math
7 3/5 ft = how many yards?? How do I do this??
January 27, 2013

Math 6 help ??????
Thanks! I understand it clearly !
January 27, 2013

Math help Thanks!
Yeah! Thanks!
January 27, 2013

Math help
You buy sneakers at 2/3 of their original prioce of \$60 = \$40 A sweater at 7/10 of its oreginal price of \$35 = 24.5 And a jacket at 5/6 of its oreginal price of \$45 = \$37.5 So you spent \$ 102 Saved (origianl cost - buying cost) ( 60+35+45) - (102) = \$38 The fraction is 38/140 ...
January 27, 2013

Math help
You buy clothing at a sale. You buy sneakers at 2/3 of their original price of \$60, a sweater at 7/10 of its original price of \$35, and a jacket at 5/6 of its original price of \$45. Answer each question and show all your work. a. How much money did you spend? b. How much money...
January 27, 2013

Math
Jennifer started with \$50 in her savings account. Each week she withdrew \$10. The amount of money in her savings account after x weeks is represented by the function f(x) = 50 - 10x. Find the intercepts.
January 25, 2013

Math PLEASE HELP!!!
Part 1: A rectangular box is 2 inches high, 3.5 inches wide amd 4 inches long. A cyliner box is 3.5 inches high and has a diameter of 3.2 inches. Use 3.14 for pi. Round to the nearest tenth. Part 2: whWhich box has a larger volume. How much bigger is the larger box?
January 10, 2013

Math I REALLY NEED HELP!!!!!!!!!
A refrigerator has inside measuremnets of 50 cm by 118 cm by 44 cm. What is the capacity of the refrigerator?
January 10, 2013

Math PLEASE HELP!!!
A contractor pours a sidewalk that is 4 inches deep, 1 yard wide, and 20 yards long. How many cubic yards of concrete will be need? (Hint: 36 inches = 1 yard)
January 10, 2013

Math PLEASE HELP!!!
A figure is dilated by a scale factor of 4. If the origin is the center of dilation, what are the coordinated in the original figure of a vertex located at (8,8) in the enlarged figure? A/(2,2) B/(4,4) No one has answered
January 9, 2013

Math I REALLY NEED HELP!!!!!!!!!
A figure is dilated by a scale factor of 4. If the origin is the center of dilation, what are the coordinated in the original figure of a vertex located at (8,8) in the enlarged figure? A/(2,2) B/(4,4)
January 9, 2013

Math I REALLY NEED HELP!!!!!!!!!
Which of the following rectangles is similar to a rectangle that measures 12 units by 16 units? A/18x24 B/9x14 C/6x10 D/16x20
January 9, 2013

Math
Which of the following rectangles is similar to a rectangle that measures 12 units by 16 units? A/18x24 B/9x14 C/6x10 D/16x20
January 9, 2013

Math
John has 11 more quarters than dimes. He has a total of \$7.65. How many quarters and dimes does he have?
December 7, 2012

Math (trigonometry)
MONDAY  December 3, 2012 SCHOOL SUBJECTS Art Business Computers English Foreign Languages Health Home Economics Math Music Physical Education Science Social Studies GRADE LEVELS Preschool Kindergarten Elementary School 1st Grade 2nd Grade 3rd Grade 4th Grade 5th Grade 6th...
December 3, 2012

Math (trigonometry)
From the top* of a cliff, not from the drop of a cliff.
December 3, 2012

Math (trigonometry)
From a boat on the water, the angle of elevation of the drop of a cliff is 31°. From a point 300 m closer, the angle of elevation is 33°. Find the height of the cliff. the answer should be 2411 m. I had tan31° = h/x+(x-300) tan33° = h/x-300 -> (x-300)tan33&...
December 3, 2012

Math (trigonometry)
How do you get the second triangle when you have an ambiguous case of sine law? For example, if you are given the following information for a triangle: a = 7.2 mm, b = 9.3 mm, <A = 35° I can solve for one triangle: Find <B, <C, side c. <B: sinB/9.3 = sin35°...
December 2, 2012

Math (trigonometry)
But in the triangle I was thinking of/the one I drew, the mountain is inside triangle ABC...? I don't really understand why I would have to take the supplementary angle of 22.3; I'm not disagreeing with you, I can see that you're right, I just don't understand ...
December 2, 2012

Math (trigonometry)
Sorry, a) should say, "calculate the distance to the top of the mountain from point A," not point B.
December 2, 2012

Math (trigonometry)
A surveyor wishes to find the height of a mountain. He selects points A and B on level ground along the same line of sight to the mountain. He measures the distance AB to be 1503 m and the angles of elevation of the top of the mountain from the points to be 16.9° from A ...
December 2, 2012

Math 8R
You're welcome.
December 2, 2012

Math 8R
The square root of 1/16 is 0.25 which is a real number. When the number under the square root is negative , that's when you have a number that is not real.
December 2, 2012

Math 8R
Sorry, completely misread the order of the letters. No, b is correct. Because 13/0 is undefined.
December 2, 2012

Math (trigonometry)
Oh! Wait, sorry, again. Never mind. That was really stupid of me. I don't know how I didn't see it, but I realise what was wrong now, thank you
December 2, 2012

Math (trigonometry)
Oh, never mind about not being able to visualise your proof at the end, I completely misread that, wow. But my diagram is still incorrect somehow because 27.4 is the adjacent side..
December 2, 2012

Math (trigonometry)
I think I may need to rethink this question because in the diagram I drew, 27.4 m is adjacent to the 45° angle. And the proof you showed me at the end cannot be visualised in my diagram.. Would it be possible for you to explain in words (I know it's really hard..) what...
December 2, 2012

Math (trigonometry)
A baseball diamond is actually a square with each side approximately 27.4 m. The pitcher's mound is 18.4 m from home plate on the diagonal of the square - note that the pitcher's mound is NOT located at the centre of the diamond! a) How far (to 3 decimal places) from ...
December 2, 2012

Math
no problem sorry again have a nice day =)
November 30, 2012

Math
ohh Sorry :( my bad
November 30, 2012

Math
Maybe.
November 30, 2012

Math
I think Side 2? I think. Your Welcome :)
November 30, 2012

math
7.9% Is the Answer :-)
November 30, 2012

Spanish III
1. comenzar ---> 1. start 2. practicar ---> 2. practice 3. jugar ---> 3. play 4. almorzar ---> 4. lunch 5. tocar ---> 5. touch 6. buscar ---> 6. search 7. llegar ---> 7. get 8. pagar ---> 8. pay 9. cruzar ---> 9. cross 10. empezar ---> 10. Start
November 29, 2012

Trigonometry
How do you solve this trig identity? Using @ as theta: Sin@-1/sin@+1 = -cos@/(sin@+1)^2 I've tried it multiple times but I can't seem to arrive at the answer.
November 27, 2012

Math (trigonometry)
Didn't you just factor that? (perfect square trinomial) I'm looking for a way to solve it without factoring..
November 27, 2012

Math (trigonometry)
How do you solve this trig identity problem without factoring? I just used @ to represent theta: sin^4@ + 2sin^2@cos^2@ + cos^4@ = 1
November 27, 2012

math
No, because 3x_ can NEVER equal to 16 so 16 divided by 3 has no answer. There will be one left out.
November 8, 2012

Physics
A 35 kg box rest in the bed of a truck. The coefficient of static friction between the box and the truck bed is 0.30 and the coefficient of friction of kinetic friction is 0.10. A) Calculate the maximum acceleration the truck can have before the box slides backwards. B) The ...
October 27, 2012

Physics
How do you know how long you need to draw the vectors? Like if the gravity vector line is longer than the normal force, or if the friction line is longer than the applied force or whatever..?
October 27, 2012

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