Sunday

August 2, 2015

August 2, 2015

Total # Posts: 83,044

**Math**

a straight section of railroad track crosses two highways at points that are 400m and 600m, respectively, from an intersection. determine the dimensions of the largest rectangular lot that can be laid out in the triangle formed by the railroad and highways.
*May 4, 2015*

**Chemistry**

1. What is the molar of a sodium bicarbonate solution prepared from 150 g of NaHCO3 in 150 mL solution? 2. What mass of glucose (C6H12O6) is needed to prepare a solution of 10 M, 5 L solution? 3. What volume in liters of a 4.0 M Ca(NO3)2 is needed to provide 50 g Ca(NO3)2?
*May 4, 2015*

**American Goverment**

Yup. You're correct.
*May 4, 2015*

**Math**

Thank you Ms. Sue :).
*May 4, 2015*

**Math**

Do I have to square root 49 and 64?
*May 4, 2015*

**Math**

If a^2 = 49 and b^2 = 64, which of the following CANNOT be a value of a + b? F. -15 G. -1 H. 1 J. 15 K. 113
*May 4, 2015*

**math**

Which hill described in the table is the steepest? (Table) Street: Horizontal (ft): Vertical Rise (ft): Dixie Hill 60 20 Bell Hill 60 40 Liberty Hill 60 30 A. Bell Hill; it rises 2/3 foot for every 1 foot of horizontal travel. B. Dixie Hill; it rises 1 foot for every 3 feet of...
*May 4, 2015*

**Math**

2: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20 3: 3, 6, 9, 12, 15, 18, 21, 24, 27, 30 9: 9, 18, 27, 36, 45, 54, 63, 72, 81, 90 15: 15, 30, 45, 60, 75, 90, 105, 120, 135, 150 so the LCD is 90
*May 4, 2015*

**Math**

I'm sorry. I don't know what I'm doing.
*May 4, 2015*

**Math**

2 x 9 x 5 = 90. I realized my mistake.
*May 4, 2015*

**Math**

Oh. I apologize.
*May 4, 2015*

**Math**

Because 2 x 9 x 15 = 90
*May 4, 2015*

**Math**

Will it be 90?
*May 4, 2015*

**Math**

What is the least common denominator when adding the fractions a / 2, b / 3, c / 9, and d / 15? A. 45 B. 90 C. 135 D. 270 E. 810
*May 4, 2015*

**math**

I don't think they all do??
*May 4, 2015*

**math**

Which quadratic rule represents the data in the table? x: -1 | 0 | 1 | 2 | 3 Y: 4 | 5 | 4 | 1 | -4 A. y= -2x^2 + 5 B. y= -x^2 + 5 C. y= x^2 - 4 D. y= x^2 + 5 Is it A or C?
*May 4, 2015*

**acting**

I've wanted to do acting for about a year, I did a lot of research so I may know a little of what to do. Just so you know this is a website to help with home work, not acting, but I can help just a little. You need to take acting classes/lessons. Plays can be the start, if...
*May 4, 2015*

**math**

idk either
*May 4, 2015*

**Math.**

Which quadratic rule represents the data in the table? x: -1 | 0 | 1 | 2 | 3 Y: 4 | 5 | 4 | 1 | -4 A. y= -2x^2 + 5 B. y= -x^2 + 5 C. y= x^2 - 4 D. y= x^2 + 5 Is it A or C?
*May 4, 2015*

**Math**

Which hill described in the table is the steepest? (Table) Street: Horizontal (ft): Vertical Rise (ft): Dixie Hill 60 20 Bell Hill 60 40 Liberty Hill 60 30 A. Bell Hill; it rises 2/3 foot for every 1 foot of horizontal travel. B. Dixie Hill; it rises 1 foot for every 3 feet of...
*May 4, 2015*

**computer**

thanks
*May 4, 2015*

**computer**

plz helpz
*May 4, 2015*

**computer**

Why do we need information?
*May 4, 2015*

**math**

the answer is $2.22. you can get the answer by adding how much Dan spent on the berries, $4.53, and peaches, 13.25 all together, and subtracting that number from the $20 dollars he paid. :-)
*May 4, 2015*

**chemistry**

a 12ml sample of 0.4m silver nitrate solution is mixed with 8 ml of 0.8m sodium chloride solution. determine the identity of precipitate and the number of grams produced.
*May 4, 2015*

**Math**

Carmen and Susan are members of their school’s running club. The length of the circular track at the school is 1/10 of a mile. In the time it takes Carmen to run 3 times around the track, Susan runs 4 times around the track. A. In the time it takes Carmen to run 12 times ...
*May 4, 2015*

**physics**

Find the total change in the internal energy of a gas that is subjected to the following two-step process. In the first step the gas is made to go through isochoric heating until it gains 5963 J and its pressure is 3.12 105 Pa. In the second step it is subjected to isobaric ...
*May 4, 2015*

**science**

correct, thank you
*May 4, 2015*

**science**

When a tennis ball smashes into a tennis racket, the ball temporarily changes shape as it compresses against the racket. Which type of energy is temporarily stored with the ball as it is compressed? (1 point) elastic potential kinetic electrical potential
*May 4, 2015*

**English**

no :)
*May 4, 2015*

**science**

3. A 10.0-kg animal is running at a rate of 3.0 m/s. What is the kinetic energy of the animal? (1 point) a. 3.3 J b. 30.0 J c. 45.0 J d. 90.0 J
*May 4, 2015*

**science**

that was correct, thank you:)
*May 4, 2015*

**science**

Two identical masses are moving down a slope. One mass is traveling twice as fast as the other mass. How does the kinetic energy of one mass compare to the other? a. The faster object has the same kinetic energy as the slower object. b. The faster object has less kinetic ...
*May 4, 2015*

**Ms. Sue PLZ HELP!!!(science)**

Levi Ackerman IT IS Y,Z,X/ I checked my book!!
*May 4, 2015*

**Ms. Sue PLZ HELP!!!(science)**

THX!!
*May 4, 2015*

**Ms. Sue PLZ HELP!!!(science)**

A portion of the amino acid sequence of an enzyme from a worm is shown below: -Q-Q-Q-Q-N-N-N-C-C Analyze the same potion of the same enzyme taken from several other organisms. Place them in order from most closely related to the worm to most distantly related to the worm. -Q-...
*May 4, 2015*

**math**

Joe starts a gym. In the first year, 300 people join. If the membership grows at an annual rate of 4%, how many members will there be after 5 years?
*May 4, 2015*

**math**

1. A(-3;4) is a point on a circle with centre at the origin. a.determine the coordinates of B, if AB is a diameter. b. Show that point C(0;5) lies on this circle. c.show that ACB has a magnitude of 90degrees. 2.a.ddetermine the equation of the circle with AC as diameter, if A ...
*May 4, 2015*

**Precal **

Evaluate the limit of f(g(x)) as x approaches 0. F(x)= 4x-4 G(x)= 8x+1
*May 4, 2015*

**creative expression and play**

i think that it is a
*May 4, 2015*

**creative expression and play **

Historically, toys have reflected the times in which they have been created. today's children sometimes play with media related figures taht: A. limit the imaginative possibilities of creative play B. develop the range of visual parameters C. encourage technological ...
*May 4, 2015*

**math**

The side of a square is measured to be 16 ft with a possible error of ±0.1 ft. Use differentials to estimate the error in the calculated area. Include units in your answer.
*May 4, 2015*

**Art and Creative Development**

i think A
*May 4, 2015*

**Art and Creative Development **

it is appropriate for teachers to comment on mass or volume when discussing: A.clay work B. collage C. pictures D. colored patterns
*May 4, 2015*

**Art and Creative Development**

i think it is B or D
*May 4, 2015*

**Art and Creative Development **

most three dimensional creation will require some sort of: A. clay or play-dough B. props C.paper bases D. fixative or fastener
*May 4, 2015*

**math**

What is the maximum volume in cubic inches of an open box to be made from a 12-inch by 16-inch piece of cardboard by cutting out squares of equal sides from the four corners and bending up the sides? Your work must include a statement of the function and its derivative. Give ...
*May 4, 2015*

**Stoichiometry **

2H2O(l) O2(g) 2SO2(g) → 2H2SO4(aq) If 50.0 g of sulfur dioxide from pollutants reacts with water and oxygen found in the air, how many grams of sulfuric acid can be produced? How many grams of oxygen are used in the process?
*May 4, 2015*

**english**

Zorros lemon tree produce too much fruit she gave them away therefore to have friends and neighbors
*May 4, 2015*

**english**

David asked “if the Week 4 assignment needed to be uploaded to Waypoint.”
*May 4, 2015*

**math**

The position function of a particle in rectilinear motion is given by s(t) s(t) = t3 – 9t2 + 24t + 1 for t ≥ 0. Find the position and acceleration of the particle at the instant the when the particle reverses direction. Include units in your answer.
*May 4, 2015*

**PHYSICS**

Please help me, I don't understand how to solve this: When some stars use up their fuel, they undergo a catastrophic explosion called a supernova. This explosion blows much or all of a star's mass outward, in the form of a rapidly expanding spherical shell. As a simple...
*May 4, 2015*

**maths**

solve the following systems of equation 5x+3y+z=-34 x-3y+2z=13 14x-2y+3z=-53
*May 3, 2015*

**chemistry**

What volume of 3.00M HCl in liters is needed to react completely (with nothing left over) with 0.750L of 0.400M Na2CO3?
*May 3, 2015*

**physics**

A cube has a density of 2200kg/m3 while at rest in the laboratory. What is the cube's density as measured by an experimenter in the laboratory as the cube moves through the laboratory at 81.0{\rm \\%} of the speed of light in a direction perpendicular to one of its faces?
*May 3, 2015*

**Math--ONE QUESTION**

Use arrow notation to describe the translation of point P(-9 , 8) to point (-14, 0). (x,y) -> (x + 5,y -8) (x,y) - > ( x - 8, y + 5) (x,y) -> (x - 5, y + 8) (x,y) -> (x - 5, y - 8 )
*May 3, 2015*

**Math Trigonometric Identities**

1/sinx - sinx = cosx/tanx
*May 3, 2015*

**Math HELPPP!**

Andrew's dog Bubba has an exercise area behind the house. A stake in the ground has a 12 foot rope tied to it. The other end of the rope is fastened to Bubba's collar. If Bubba travels in a circular path around the stake. What is the largest Circumference allowed by ...
*May 3, 2015*

**Math**

That leaves me with x > 6
*May 3, 2015*

**Math**

The solution set of radical(x - 1) (is greater than sign) 5 is the set of all real numbers x such that: F. x (is greater than sign) 4 G. x (is greater than sign) 6 H. x (is greater than sign) 24 J. x (is greater than sign) 25 K. x (is greater than sign) 26
*May 3, 2015*

**Math**

The measure of each interior angle of a regular polygon with n sides is [(n - 2)180 / n] degrees. What is the measure of each interior angle of a regular polygon with n sides, in radians? A. (n - 2)pi / 4n B. (n - 2)pi / 2n C. (n - 2)pi / n D. (n - 2)2pi / n E. (n - 2)4pi / n
*May 3, 2015*

**Physics**

Prove that if an object is at a distance of twice the focal length from a lens the image is the same size as the object. Show this using an algabraic method.
*May 3, 2015*

**Math**

If tan A = a / b, a (is greater than sign) 0, b (is greater than sign) 0, and 0 is (less than sign) A (is less than sign) pi / 2, then what is cos A? a. a / b B. b / a C. a / radical(a^2 + b^2) D. b / radical(a^2 + b^2) E. radical(a^2 + b^2) / b
*May 3, 2015*

**Math trigonometric Identities**

Is this correct? (sinx - cosx)^2 = 1 - 2sinxcosx LS = sin^2x - 2sinxcosx + cos^2x = 1 - cos^2x - 2sinxcosx + cos^2x = 1 - cos^2x + cos^2x - 2sinxcosx = 1 - 2sinxcosx LS = RS
*May 3, 2015*

**Algebra **

Robert needs to cut for shelves from a board that is 2.5 m long. the second shelf is 18 cm longer than twice the length of the first shelf. the third shelf is 12 cm shorter than the first shelf. the remaining shelf is 4 cm longer than the first shelf. if Robert must use the ...
*May 3, 2015*

**PHYSICS**

When some stars use up their fuel, they undergo a catastrophic explosion called a supernova. This explosion blows much or all of a star's mass outward, in the form of a rapidly expanding spherical shell. As a simple model of the supernova process, assume that the star is a...
*May 3, 2015*

**Math**

Thank you Steve :).
*May 3, 2015*

**Math**

The ratio of a to b is 3 to 4, and the ratio of c to b is 1 to 2. What is the ration of a to c? F. 1 to 1 G. 3 to 1 H. 3 to 2 J. 3 to 8 K. 6 to 1
*May 3, 2015*

**Math**

Thomas and Jonelle are playing darts in their garage using the board with the point values for each region shown below. The radius of the outside circle is 10 inches, and each of the other circles has a radius 2 inches smaller than the next larger circle. All of the circles ...
*May 3, 2015*

**Math**

Thanks!!
*May 3, 2015*

**Math**

What would the grapg of 10/x look like? A. a straight line B. a parabola C. a curve*** D. none of the above What would the graph of y=3/4x - 7/8 look like? A. a straight line*** B. a parabola C. a curve D. none of the above y=x2 + 1 look like? A. straight line B. a parabola...
*May 3, 2015*

**math**

which function has the greater rate of change? x-axix: -1 | 0 | 1 | 2 | y-axis: 0 | 1 | 2 | 3 | the graph has a line and 3 dots on the line. the first dot is 0, -1 the second dot is 0, 1 the third dot is 1, 2 A. the rates of change are equal B. the graph has a greater rate of ...
*May 3, 2015*

**Math**

Thank you Ms. Sue :).
*May 3, 2015*

**Math**

40%
*May 3, 2015*

**Math**

On September 1, a dress was priced at $90. On October 1, the price was reduced by 20%. On November 1, the price was further reduced by 25% of the October 1 price and marked FINAL. What percent of the original price was the FINAL price? F. 40% G. 45% H. 55% J. 60% K. 77.5%
*May 3, 2015*

**physics**

vibrating a long spring with a succession of pulses with a frequency of 50Hz produces adjacent nodes that are separated by 3.5cm. what is the velocity of the longitudinal waves formed?
*May 3, 2015*

**Math**

I'm a little confused. Is the right equal to 2sin to the power of 2x-1?
*May 3, 2015*

**Math**

(sinx - cosx)(sinx + cosx) = 2sin^2x -1 I need some tips on trigonometric identities. Why shouldn't I just turn (sinx + cosx) into 1 and would it still have the same identity?
*May 3, 2015*

**mth121**

mth 121(solve the linear equation:2x+3y=3, x-2y=5 and 3x+2y=7.)
*May 3, 2015*

**trigonometry**

Solve cos(x)=0.07 on 0≤x<2π
*May 3, 2015*

**Sociology**

I need help choosing an object to describe me for a sociology project.
*May 3, 2015*

**English**

Why is it that Ray Bradbury wrote Fahrenheit 451 during the 1950s?
*May 3, 2015*

**Math**

There is more to it... Find the exact value tan^-1(tan(-22/15pi)) I just could not figure out how to find an exact value for tan(-22/15pi)
*May 3, 2015*

**Math**

Evaluate the following expressions tan(−22/15π)
*May 3, 2015*

**Math**

Is 8x^2 + x^2 - 7x - x + 2x + 5y - 3y equal to 9x^2 - 8x + 2y or 9x^2 - 6x + 2y?
*May 3, 2015*

**math**

55
*May 3, 2015*

**ANT101 **

Sir Edward Burnett Tylor’s concept of survivals is best defined by which of the following? (Points : 1) Cultural traits change the least because they are the means by which a society copes with its environment. Primitive cultures have avoided extinction as more complex ...
*May 2, 2015*

**PHYSICS**

When some stars use up their fuel, they undergo a catastrophic explosion called a supernova. This explosion blows much or all of a star's mass outward, in the form of a rapidly expanding spherical shell. As a simple model of the supernova process, assume that the star is a...
*May 2, 2015*

**Math**

I need help proving this identity 1/cosx - cosx = sinxtanx
*May 2, 2015*

**PHYSICS**

A pipe 0.42 m long and closed at one end is filled with an unknown gas. The third lowest harmonic frequency for the pipe is 780 Hz. (a) What is the speed of sound in the unknown gas? (b) What is the fundamental frequency for this pipe when it is filled with the unknown gas?
*May 2, 2015*

**PHYSICS**

A uniform board is leaning against a smooth vertical wall. The board is at an angle above the horizontal ground. The coefficient of static friction between the ground and the lower end of the board is 0.750. Find the smallest value for the angle , such that the lower end of ...
*May 2, 2015*

**ANT101 **

The ___ method of anthropology is useful in many different work settings. (Points : 1) marketing pedagogical statistical participant observation
*May 2, 2015*

**PHYSICS**

A hiker, who weighs 977 N, is strolling through the woods and crosses a small horizontal bridge. The bridge is uniform, weighs 4500 N, and rests on two concrete supports, one on each end. He stops 1/6 of the way along the bridge. What is the magnitude of the force that a ...
*May 2, 2015*

**PHYSICS**

The figure shows a jet engine suspended beneath the wing of an airplane. The weight of the engine is 14600 N and acts as shown in the figure. In flight the engine produces a thrust of 55100 N that is parallel to the ground. The rotational axis in the figure is perpendicular to...
*May 2, 2015*

**Math - Trigonometry**

Reiny, are you still here. I need help quick. I'm really bad at trigonometric identities. I need help.
*May 2, 2015*

**Math - Trigonometry**

LS = 1/cosx - cosx/cosx = 1-cosx/cosx = sinx/cosx I know this answer is extremely wrong. I have no idea what to do.
*May 2, 2015*

**Math - Trigonometry**

I need help proving this identity 1/cosx - cosx = sinxtanx
*May 2, 2015*

**Math - Trigonometry**

I need help proving this identity 2sin^2x - 1 = sin^2x - cos^2x
*May 2, 2015*

**Math - Trigonometry**

I need help proving this identity cscx + secx = (cosx + sinx)(secx)(cscx)
*May 2, 2015*