# Posts by taylor

Total # Posts: 1,920

**Algebra**

what?

**math**

How many real number solutions does the equation have? y=-5x^2+8x-7

**Physics**

If a proton in a proton beam experiences a downward force of 2.0X10-14N while traveling in a magnetic field of 8.3X10-2T west, what is the velocity?

**Science**

Electronic band structures are caused by electron-electron interactions between neighboring atoms. The greater the degree of interaction, the wider the band generally becomes. For this reason, atoms with high coordination numbers tend to form wider bands, since more bonds are ...

**Science**

“Strained silicon” technology is a technique where a silicon thin film is deposited onto a silicon-germanium (SiGe) film. Both Si and SiGe have the same crystal structure, but the lattice parameter of SiGe is larger than that of pure silicon. Therefore, when a film ...

**physics**

A plane is cruising at 155.00 km/h increases it speed to 285.1 km/h in just 11.5 s as it makes a dive. What was the acceleration of the plane? a = vf - vi / t

**Science**

Can someone please explain? This tool is called a McLeod rake, a tool commonly used in fighting forest fires or wild fires. It is used to clear vegetation in order to make firebreaks, and also to cut off stray branches. The metallic head part of the rake is often made out of ...

**Math**

A uniform width boardwalk is built around the inside edge of a rectangular parkland that is 30 m by 5 m. If the boardwalk takes up 20% of the lot, how wide is the boardwalk to the nearest cm?

**Grade 11 math**

A uniform-width boardwalk is built around the inside edge of a rectangular parkland that is 10m by 5m. If the boardwalk takes up 20% of the lot, how wide is the boardwalk to the nearest centimetre? I have no idea what to do after figuring out that: Total area= 150m^2 Boardwalk...

**World History**

Do you have the answers to the rest of the test? Unit 6: World War 1 and the Russian Revolution

**Physics**

HBO is concerned about injuries on the set of their award winning fantasy series Game of Thrones. Star characters are given real swords which have a point of balance (centre of mass) 5.0cm above the top of the handle. For safety reasons, you are given only the 15cm long, 0....

**College Algebra**

f(x)=3x^2+3x-3 if f(-x)=

**Algebra**

What is the general relationship between the degree of a polynomial function and the number of "bends" or relative maximum and minimum points in the graph?

**Math**

-3(5×-3)-5=(-15×9)-5 135-5=130

**Math**

The sum of two numbers is 9.twice their product gives 40.find the numbers. One number exceeds another by 4.the sum of their square is 208. What are the numbers. The area of a rectangular field is 108square .the perimeter is 42. Find the length.

**Math**

The store usually sells the baskets of fruit for 15 dollars but today they have a 5% discount which is the new price. Please help me i am totally confused on what is going on.

**math **

A boat traveled downstream a distance of 9090 mi and then came right back. If the speed of the current was 88 mph and the total trip took 66 hourscomma nbsp, find the average speed of the boat relative to the water.

**math**

2 pieces

**123**

on

**Physical science**

Explain whether the size of an object’s displacement could be greater than the distance the object travels.

**PE**

3. the fruit filled donut

**Reading Process LA Q**

NO he is not i just got a 0 THANK YOU VERY MUCH.

**Math**

12/56

**Math**

When Carla looked out at the school parking lot, she noticed that for every 2 minivans, there were 5 other types of vehicles. If there are 39 vehicles in the parking lot, how many of them are not minivans? I am confused on how to solve this problem. I need help solving the ...

**Math**

sqrt of 12r^7s^7 divide by sqrt of r^5s^2

**Math**

The diagonal of a square is 3 feet long. Find its perimeter. My answer: a^2+b^2=c^2 x^2+x^2=3^3 2x^2=9 divide both side by 2 x^2=4.5 x=?4.5 x=2.1 feet Is this right?

**chemistry**

how many grams of NaOh are needed to make 50 g of Na3PO4 according to the equation: 3NaOH+H3PO4=Na3PO4+3H2O (i'm not sure where to even start for this!)

**chemistry**

how many grams of NaOh are needed to make 50 g of Na3PO4 according to the equation: 3NaOH+H3PO4=Na3PO4+3H2O (i'm not sure where to even start for this!)

**Algebra**

A student has a mean score of 89 on 5 tests. what will be the new mean if she scores a 95 on the next test? (89+95)/6=X

**Algebra**

Oh okay. Thank you

**Algebra**

But I got 30.667 as my answer. So do I add that to the 89?

**Algebra**

A student has a mean score of 89 on 5 tests. what will be the new mean if she scores a 95 on the next test? (89+95)/6=X

**math**

Mileys music has a sale on music cds. All music Cds are discounTed 15%. mariana's receipt indicates that she saved $3 on her cd purchase. What is the full price of her music cd before discount

**physics**

Just like the efficiency can be used to tell how 'good' an engine is, the Coefficient of Performance can be used to compare refrigerators. If a refrigerator requires 1.21×104 J of work to remove 3.23×104 J of energy from the inside of a refrigerator, what ...

**Calc**

Use Stokes' Theorem to evaluate C F · dr where C is oriented counterclockwise as viewed from above. F(x, y, z) = xyi + 5zj + 7yk, C is the curve of intersection of the plane x + z = 8 and the cylinder x2 + y2 = 9.

**Calc**

Use Stokes' Theorem to evaluate C F · dr where C is oriented counterclockwise as viewed from above. F(x, y, z) = yzi + 9xzj + exyk, C is the circle x2 + y2 = 1, z = 3.

**Calc**

Evaluate the surface integral S F · dS for the given vector field F and the oriented surface S. In other words, find the flux of F across S. For closed surfaces, use the positive (outward) orientation. F(x, y, z) = xy i + yz j + zx k S is the part of the paraboloid z = ...

**American government**

How have NATO's operations changed over time ? A.) NATO only directs peacekeeping measures now B.) NATO no longer defends Western Europe C.) NATO has fewer member countries now than when it began D.) NATO's activities now include crisis management and peacekeeping ...

**physics**

A 3.35g lead bullet at 31.0°C is fired at a speed of 255 m/s into a large block of ice at 0°C, in which it embeds itself. What quantity of ice melts?

**MATH**

Find the area of the part of the plane with vector equation r(u, v) = <2 + v, u ? 7v, 5 ? 4u + v> that is given by 0 ? u ? 1, 0 ? v ? 1.

**MATH**

Find a parametric representation for the part of the cylinder y2 + z2 = 4 that lies between the planes x = 0 and x = 5. x = u y = 2cos(v) z = 0 ? v ? 2?

**MATH**

Find an equation of the tangent plane to the given parametric surface at the specified point. r(u, v) = u cos vi + u sin vj + vk; u = 7, v = ?/3

**MATH**

Its wrong Steve

**MATH**

Find the area of the surface. The part of the paraboloid z = x2 + y2 that lies inside the cylinder x2 + y2 = 4.

**chem**

A chemist is commissioned to produce twenty pallets of aspirin: C7H6O3 (salicylic acid) + C4H6O3 (acetic anhydride) ? C9H8O4 (aspirin) +C2H4O2 (acetic acid) Given a bottle contains 500 tablets (each containing 325 mg of aspirin). A case contains 144 bottles. A pallet contains...

**physics**

Blood flows in an aorta of radius 4.12mm at 35.0cm/s. Calculate the volume flow rate. Although the cross-sectional area of a capillary is much smaller than that of the aorta, there are many capillaries, so their total cross-sectional area is much larger. If all the blood from ...

**MATH *PLEASE HELP**

Use Green's Theorem to evaluate C F · dr. (Check the orientation of the curve before applying the theorem.) F(x, y) = y2 cos x, x2 + 2y sin x C is the triangle from (0, 0) to (1, 3) to (1, 0) to (0, 0)

**Math**

Consider F and C below. F(x, y, z) = (2xz + y2) i + 2xy j + (x2 + 15z2) k C: x = t2, y = t + 2, z = 3t ? 1, 0 ? t ? 1 (a) Find a function f such that F = ?f. f(x, y, z) = x2z+xy2+5z3+C Correct: Your answer is correct. (b) Use part (a) to evaluate C ?f · dr along the ...

**Math**

Determine whether or not F is a conservative vector field. If it is, find a function f such that F = ?f. If it is not, enter NONE. F(x, y) = (3x^2 ? 2y^2) i + (4xy + 2) j

**algebra**

you need an average of 88. you have scored an 85,90,80,94 on four out of five test. what must your score be on the 5th test to have an average of an 88??

**Calc**

A particle starts at the point (?3, 0), moves along the x-axis to (3, 0), and then along the semicircle y = sqrt(9 ? x^2) to the starting point. Use Green's Theorem to find the work done on this particle by the force field F(x, y) = <2x, x^3 + 3xy^2> .

**Math**

Use Green's Theorem to evaluate C (F · dr) (Check the orientation of the curve before applying the theorem.) F(x, y) = e^(2x) + x^(2)y, e^(2y) ? xy^2 C is the circle x^2 + y^2 = 4 oriented clockwise

**science**

what do mangroves ecosystem provide for organisms

**American Government**

How have NATO's operations changed over time ? A.) NATO only directs peacekeeping measures now B.) NATO no longer defends Western Europe C.) NATO has fewer member countries now than when it began D.) NATO's activities now include crisis management and peacekeeping ...

**Math**

Evaluate the line integral, where C is the given curve. (Integral)C z dx + x dy + y dz, C: x = t^4, y = t^5, z = t^4, 0 ? t ? 1

**Math**

Evaluate the line integral SC F · dr, where C is given by the vector function r(t). F(x, y, z) = sin x i + cos y j + xz k r(t) = t^4i ? t^3j + tk, 0 ? t ? 1

**Math**

Find the work done by the force field F(x, y, z) = <y + z, x + z, x + y> on a particle that moves along the line segment from (1, 0, 0) to (5, 2, 3).

**Science**

An object accelerates at 7.5m/s^2 with a force of 25N west being applied to it and there is a frictional force of 13N. What is the mass of the object

**Science**

If an object with a mass of 98kg at 2.5m/s^2, what amount of force is applied to it?

**Math**

STONE-GROUND FLOUR The radius of a milestone is 3 meters greater than the radius of another, and their areas differ by 15pi square meters. Find the radius of the larger milestone.

**American government**

I'm writing a paper explaining how the constitution and its european influences support our modern ideas about american citizenship and the rights and responsibilities of being a citizen Can someone help me like give me some ideas I'm stuck on this paper :/

**American government**

I really need help with these questions:( if anyone can I'd really appreciate it How have NATO's operations changed over time ? A.) NATO only directs peacekeeping measures now B.) NATO no longer defends Western Europe C.) NATO has fewer member countries now than when ...

**math**

the 12 oz can but I came out with a remainder when I divided not sure what I am suppose to do if I show a remainder

**math**

12 ounces of corn costs .59 16 ounces of corn costs .81 which is the better by .59/12=.04 .81/16-.05

**physics**

A block with a mass of 0.306 kg is attached to a spring of spring constant 444 N/m. It is sitting at equilibrium. You then pull the block down 4.50 cm from equilibrium and let go. What is the amplitude of the oscillation?

**math**

if a 12 ounce can of beans cost .59 how much does one ounce cost .59/12=.04

**physics**

A horizontal circular platform (m = 122.1 kg, r = 3.43m) rotates about a frictionless vertical axle. A student (m = 82.3kg) walks slowly from the rim of the platform toward the center. The angular velocity, omega, of the system is 2.9 rad/s when the student is at the rim. Find...

**Math**

How would you describe your understanding of rational numbers? (Select all that apply)

**physics**

A block of mass 0.49kg starts from rest at point A and slides down a frictionless hill of height h. At the bottom of the hill it slides across a horizontal piece of track where the coefficient of kinetic friction is 0.28. This section (from points B to C) is 3.60m in length. ...

**Physics**

A ball is thrown straight up at 45 m/s. How long will it take the ball to come back to its original height? Why?

**Algebra**

Solve the system by elimination -2x + 2y + 3z = 0 -2x - y + z = -3 2x + 3y + 3z = 5

**Algebra**

Can someone please help me I'd really appreciate it Solve the system by substitution -x - y - z = -8 -4x + 4y + 5z = 7 2x + 2z =4

**physics**

A 65.2 kg person jumps from rest off a 3.11 m-high tower straight down into the water. Neglect air resistance during the descent. She comes to rest 1.08 m under the surface of the water. Determine the magnitude of the average force that the water exerts on the diver. This ...

**physics**

On a frozen pond, a 13.9 kg sled is given a kick that imparts to it an initial speed of v0 = 1.81 m/s. The coefficient of kinetic friction between sled and ice is μk = 0.122. Use the work kinetic energy theorem to find the distance the sled moves before coming to rest.

**Algebra**

Solve the system by substitution: -4.5x-2y=-12.15 3.25x-y=-0.75

**Chemistry**

To prepare a solution of NaCl, you weigh out 2.634 (0.002)g and dissolve it in a volumetric flask whose volume is 100.00 (0.08) mL. Express the molarity of the solution, along with its uncertainty.

**Math**

In Cathy's garden 5/6 of the area is planted with flowers. Of the flowers, 3/10 of them are red. What fraction of Cathy's garden is planted with red flowers?

**Chemistry**

A 635 mL solution of HBr is titrated with 0.51 M KOH. If it takes 1569 mL of the base solution to reach the equivalence point, what is the pH when only 141 mL of the base has been added to the solution?

**physics**

Block A (Mass = 5.195 kg) and Block B (Mass = 3.330 kg) are attached by a massless string as shown in the diagram. Block A sits on a horizontal tabletop. There is friction between the surface and Block A. The string passes over (you guessed it) a frictionless, massless pulley...

**Science**

The density of steel metal is 7.81g/cm3.

**physics**

Two ropes are pulling upward on a large crate. The weight of the crate is 458 N. The tension in the left rope is the same as the tension in the right rope.If the crate is accelerating upward at a rate of 1.95 m/s2, and the tension in the two ropes is the same, what is the ...

**physics**

Determine the direction of frictional forces (left, right, up down) for the objects: 1) A cup resting on top of a car. The car is moving and accelerating to the right. 2) A block being pushed to the right up an incline. 3)A block being placed at the middle of an incline (slope...

**Math**

Create a story problem (scenario) that could be solved using the expression:1 1/2

**Alg**

A charter boat travels at a maximum rate of 25 mph. The function d(x) = 25x represents the distance d(x),in miles, that the boat can travel in x hours. The charter boat travels a maximum distance of 75 miles from the shore.

**Alg**

Find a reasonable domain and range for each function- A charter boat travels at a maximum rate of 25 mph. The function d(x) = 25x represents the distance d(x),in miles, that the boat can travel in x hours. The charter boat travels a maximum distance of 75 miles from the shore

**Alg**

A charter boat travels at a maximum rate of 25 mph. The function d(x) = 25x represents the distance d(x),in miles, that the boat can travel in x hours. The charter boat travels a maximum distance of 75 miles from the shore.

**Alg 1**

To earn a B in your Algebra class, you must achieve an unto under test average between 84 and 86 (inconclusive). You scored 86,85, and 80 on the first three tests of threading period. What possible scores can you earn on the fourth and final test to earn a B in the course?

**American Government**

Oh okay thank you

**American Government**

Or would it be A since the national and state share power

**American Government**

Would it be D?

**American Government**

why does federalism create tension between state and national governments? A.) Both national and state governments share power. B.) state and local governments have no support from national government C.) states are not able to work with each other D.) the national government ...

**American government**

How does the 10th amendment shown below demonstrate a constitutional provision for limiting government? The powers not delegated to the United States by the Constitution, nor prohibited by it to the states, are reserved to the states respectively, or to the people. A.) It ...

**American government**

1. Was c not D

**American government**

Thank you so much

**American government**

1.) Which of the following is true about the formal amendment process for the Constitution? A.) Any citizen may propose an amendment. B.) only Congress may propose an amendment. C.) both houses of Congress must pass a resolution to propose an amendment. D.) the president can ...

**social studies**

#4 is c (just took the test)

**college physics**

A student observes 30 waves traveling down a string in a lab experiment. It takes 10 seconds for the waves to all go by. What is the frequency of the waves (in Hz)?

**College physics**

Please help me... I have no idea where to begin...A tone of 4000 Hz is being played on a tuning fork. You run toward the tuning fork at 5 m/s. What frequency do you hear? Take the speed of sound to be 343 m/s.

**Economics - PLEASE HELP**

We don't have a text. It's an online class and we never learned any of this. Thanks, though.

**Economics - PLEASE HELP**

So.. Here's my second try: 1. C 2. A 3. B 4. A 5. B Are these right?