# Posts by anonymous

Total # Posts: 106,782

**MATHEMATICS**

at a farmers market you buy 4 lbs of tomatoes and 2 lbs. of sweet potatoes.

*March 20, 2017*

**Chemistry**

Calculate the wavelength, in nanometers, of the spectral line produced when an electron in a hydrogen atom undergoes the transition from the energy level n = 4 to the level n = 1.v

*March 20, 2017*

**Physics**

What is the direction of the displacement of a person who walks 10 km at 37 degrees south of east, then 14 km due west?

*March 19, 2017*

**math**

?_0^1??_1^2??(x^2+y^2)dxdy?using simpson's one third rule

*March 19, 2017*

**Trigonometry**

prove (sinx-tanx)^2=(tan^2x)(cosx-1)^2

*March 19, 2017*

**math**

One number is greater than another by 40/11. If the smaller number is less than 47/22 by 1/2, find the numbers.

*March 19, 2017*

**Math**

There was a sample of 550 milligrams of a radioactive substance to start a study. Since then, the sample has decayed by 5.2% each year. Let t be the number of years since the start of the study. Let y be the mass of the sample in milligrams. Write an exponential function ...

*March 19, 2017*

**math**

In a quadrilateral ABCD, AB || DC and AD||BC . Find the perimeter of ?COD if the diagonals of the quadrilateral intersect each other at pointOand AC = 20 in, BD = 20 in, AB = 13 in.

*March 19, 2017*

**Math**

One of the angles of a parallelogram is 36° greater then another one. Find the angles of the parallelogram.

*March 19, 2017*

**chemistry**

. What is the pH of a solution in which 15 mL of 0.10 M NaOH is added to 25 mL of 0.10 M HCl?

*March 19, 2017*

**micro economics theory 2**

a watch making firm operating in a competitive market.given by c= 100+ q2., where q is the level of output & c is total cost. a.the price of watches is birr is 60, how many watches produce to maximize profit? b.what will your profit level be? c.at what minimum price will you ...

*March 19, 2017*

**iqra**

. The equation for a demand curve has been estimated to be Q = 100 - 10P + 0.5Y, where Q is quantity, P is price, and Y is income. Assume P = 7 and Y = 50. a. Interpret the equation. b. At a price of 7, what is price elasticity? c. At an income level of 50, what is income ...

*March 19, 2017*

**Chemistry**

What mass of ammonia is necessary to produce 500 kJ of heat? 4 NH3(g) + 5 O2(g) ? 4 NO(g) + 6 H2O(g) ?rH = -906 kJ mol-1

*March 18, 2017*

**Science**

Mass of iron cube having edge length 1.8m is 70g.Find it's density.

*March 18, 2017*

**Human resource**

Why absolutely not?

*March 18, 2017*

**Human resource**

Suppose you are a staff nurse in a hospital that uses an incentive compensation system. Do you have an obligation to disclose the nature of the compensation arrangement to patients? if so, how should this information be communicating, and by whom?

*March 18, 2017*

**Educational Technology**

Of the following websites, the least trustworthy is the one that: A: Has the author's name and the current year as the date the site was posted. B: Has in-depth information and has a .gov URL. C: Has photographs and a copyright date of 1997. D: Has a company logo and the ...

*March 18, 2017*

**chemistry**

8/1=?1/8=8=1/8

*March 18, 2017*

**chemistry **

Under the same condition temperature and pressure hydrogen diffuses 8 times as fast as gas y calculate the rmm of gas y the rmm of h=2

*March 18, 2017*

**Chemistry**

O = 16 g/mol Mg = 24 g/mol so mass MgO/mass Mg = (24+16)/24 mass MgO = 24 (24+16)/24 = 40 grams

*March 18, 2017*

**physics**

(1/2) k x^2 = (1/2)(144)(.01) Joules

*March 18, 2017*

**Algebra**

Difference of two ninbers is 5 and difference of thier reciprocal is 1/10 find the numbers. Answer: X-Y=5 X=Y+5 1/X - 1/Y = 10 1/Y+5 - 1/Y =10 LCM ....

*March 17, 2017*

**Math**

7m long flagstaff is fixed on tower standing on horizontal plain . Frm a point on the ground angle of elevation of top and bottom of flag staff are 60 and 40 find height of tower

*March 17, 2017*

**chemistry**

Calculate the pH of a buffer solution prepared by mixing equal volumes of 0.20 M NaHCO3 and 0.10 M Na2CO3. (Ka = 4.3 x10-7)

*March 17, 2017*

**Math - Trigonometry**

When calculating the lengths for a square based pyramid, is there a way to calculate the length from a point to the point opposite of it, given the side length and height? Thanks in advanced.

*March 17, 2017*

**Physics**

A wire runs left to right and carries a current in the direction shown. What is the direction of the magnetic field at point Z?

*March 17, 2017*

**Physics**

A positive charge moving up enters a magnetic field pointing out of the screen. What is the direction of the magnetic force on the charge? up down right left

*March 17, 2017*

**Physics**

direction of the magnetic field?

*March 17, 2017*

**Physics**

What must be known to determine the direction of the magnetic force on a charge? the type of the charge the amount of the charge the direction of the magnetic field the velocity of the charge the strength of the magnetic field

*March 17, 2017*

**Physics**

Here are the choices: 0.01 T 0.05 T 0.1 T 0.2 T

*March 17, 2017*

**Physics**

that's not one of the choices

*March 17, 2017*

**Physics**

The magnetic field 0.02 m from a wire is 0.1 T. What is the magnitude of the magnetic field 0.01 m from the same wire?

*March 17, 2017*

**Language Arts**

Thank you!!

*March 17, 2017*

**Language Arts**

If I had to change my answer I would think 1 is C.

*March 17, 2017*

**Language Arts**

The Tide Rises, the Tide Falls by Henry Wadsworth Longfellow The tide rises, the tide falls, The twilight darkens, the curlew calls; Along the sea-sands damp and brown The traveller hastens toward the town, And the tide rises, the tide falls. Darkness settles on roofs and ...

*March 17, 2017*

**Language Arts**

Thank you!

*March 17, 2017*

**Language Arts**

1. Which of the following sentences has correct subject-verb agreement? A. A scarf or a hat keep you warm in the winter. B. Either Grandma or your brother pick your birthday gifts each year. C. Stacey and her sisters go to the beach every summer.** D. A dog or a cat are a good...

*March 17, 2017*

**Language Arts**

Thank you!!

*March 17, 2017*

**Language Arts**

1. what is the best way to correct the error in this sentence? Neither Tim nor Kristina go to the movies often A.delete the conjunction B.Change go to attend C.Change the verb to goes** D.Change neither to either 2. Which sentence below contains a dependant clause ? A. I know ...

*March 17, 2017*

**Math - Trigonometry**

A, B and C are three towns, the bearing of B and C from A being 295° and 205°, and their distances from A are 280km and 800km respectively. Find the bearing of C from B to the nearest minute.

*March 17, 2017*

**Math - Trigonometry**

Standing on top of a building 42 m high, an observer sights two objects at P and Q on opposite sides of the building. The angles of depression from the observer to P and Q are 23° 18' and 35° 33' respectively. What is the distance between P and Q to the nearest...

*March 17, 2017*

**Math - Trigonometry**

Ok, I know how to do this question, but I just don't get the apostrophe after 15. Supposedly, it means seconds but I don't know what that has to do with this.

*March 17, 2017*

**Math - Trigonometry**

The diagonal of a rectangle of width 3.8, makes an angle of 32° 15' with each of the longer sides. Find the length of the diagonal, and the length of the rectangle. Im not sure how to picture/draw the shape, which in term will tell me if it is cos, sin or tan. Also ...

*March 17, 2017*

**Math**

Same.

*March 17, 2017*

**Math**

area of a rectangle is length times width and 3/4 mile is width

*March 17, 2017*

**physical science**

2.0x10^19-protons is net electric charge since electrons are negative and protons are positive.Is the protons given also?

*March 17, 2017*

**math**

2/3=4/6 and 1/6=1 drop

*March 17, 2017*

**math**

in cooking 1 drop equal 1/6 of a dash. if a recipe calls for 2/3 of a dash, how many drops would that be.

*March 17, 2017*

**Math**

half of 4 is 2 and 4 1/2 is 2 1/4

*March 17, 2017*

**Math**

What is half of 4 and 4 1/2

*March 17, 2017*

**English**

dancing is an action verb not an adjective. Dance could be a noun or adjective depending what is used, so the first one is correct since its describing classes.

*March 17, 2017*

**world history**

how was the roman empire latinized? how did roman culture and politics spread?

*March 16, 2017*

**Math**

I have a rectangle with a semicircle on each end.the area of the rectangle is 5500 sqare meters. What is the perimeter of the track

*March 16, 2017*

**economics**

explain the role of moral considerations in policy selections

*March 16, 2017*

**Math**

I need some help on this function rule question please. 8.) Find the function rule. x: -2 -1 0 1 2 y: 9 4 -1 -6 -11 I'm having a really hard time figuring this out. Thanks to anyone that helps:)

*March 16, 2017*

**LA**

which line in the river poem contains a simile

*March 16, 2017*

**Chemistry**

You dissolve 2.35 g of sodium carbonate (Na2CO3) in sufficient water to produce a final solution volume of 100.0 mL. Assuming all of the solid dissolves, calculate the solution pH.

*March 16, 2017*

**Calculus**

How do you use u-substitution with 20sin(x^2/35)?

*March 16, 2017*

**Maths**

A car travels 240 km in 2 hours. How long will it take to travel 600 km at the same speed?

*March 16, 2017*

**Physics**

Given that charge of the electron is 1.6 x10^-19 C,What is the energy gained by the cathode ray particle when a voltage of 800 volts is applied between the electrodes of a cathode ray tube

*March 16, 2017*

**physics**

The answer is 22.3m for the maximum height.

*March 16, 2017*

**maths**

show that the radius of right circular cylinder of maximum volume that can be inacribed in a sphere of radius 18cm is 8?6

*March 16, 2017*

**probability **

Paul is vacationing in Monte Carlo. On any given night, he takes X dollars to the casino and returns with Y dollars. The random variable X has the PDF shown in the figure. Conditional on X=x, the continuous random variable Y is uniformly distributed between zero and 2x. ...

*March 16, 2017*

**algebra**

George goes to the supermarket to buy some canned tomatoes to make salsa for a party. The cans are on sale for $0.95 each. He has $4.75. Let x represent the number of cans that he can buy. Write the equation that models this situation.

*March 16, 2017*

**basic math**

how to write forty five thousand three hundred twelve

*March 15, 2017*

**math**

Thank you!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!:))):):):)))))))):):):):):):):):):):):D:D:D:D:D:D:D:D:D:D:D:D:D I seriously just guessed!

*March 15, 2017*

**math**

not sure. All I got was a line with 42 ft with a dot in the middle

*March 15, 2017*

**math**

find the circumference of the circle round to the nearest foot. it is 42 ft I got a but I'm not sure. A.132ft B.264ft C.1,320FT D.2,640FT

*March 15, 2017*

**Science**

How are the primary pigments related to the primary colors? The primary pigments are: A. Complementary to the primary colors B. Associated with the primary colors C. Unrelated to the primary colors Is the answer A?

*March 15, 2017*

**Math**

If the scale had been 2/3 inch: 4 feet , how many inches longer would the scale drawing of Quinta's bedroom have been?

*March 15, 2017*

**AP Physics**

A block and a spool have the same mass, and are each pulled across a level, frictionless surface by a string, as shown to the right. The string pulling the spool is wrapped around it many times, and the other string is fastened to the center of the block. Both hands pull with ...

*March 15, 2017*

**Language Arts**

In what marking period was Melinda suicidal. In the book Speak And please do not give me links to other sites.

*March 15, 2017*

**Physics**

A block and a spool have the same mass, and are each pulled across a level, frictionless surface by a string, as shown to the right. The string pulling the spool is wrapped around it many times, and the other string is fastened to the center of the block. Both hands pull with ...

*March 15, 2017*

**Physics**

A potter’s wheel with rotational inertia 24 kg m2 is spinning freely with no friction at 50 rpm. A piece of clay is dropped from above the wheel and sticks 0.5 m from the center of the wheel. Afterward, the rotational speed of the wheel and clay has dropped to 48 rpm. The...

*March 15, 2017*

**Physics**

The game of Jacks is played with pieces like those shown to the right, consisting of four small spheres at the ends of two perpendicular rods of length L and mass M. The piece is spun as shown about an axis through the third perpendicular rod of length L and mass M. Assume ...

*March 15, 2017*

**Physics**

A wheel with rotational inertia I initially rotates with a angular speed ?i . A torque is applied, speeding the wheel up to three times the angular speed in time ?t . A) Find the magnitude of the applied torque. B) Find the work done on the wheel during this time.

*March 15, 2017*

**Physics**

A hamster sits 0.10 m from the center of a lazy Susan of negligible mass. The wheel has an angular velocity of 1.0 rev/s. How will the angular velocity of the lazy Susan change if the hamster walks to 0.30 m from the center of rotation? Assume zero friction and no external ...

*March 15, 2017*

**Science**

post.

*March 15, 2017*

**Science**

V1 = -45 m/s. V2 = 30 m/s. a = (V2-V1)/t = (30-(-45))/1.2 =

*March 15, 2017*

**English**

In the poem silk weed which line from the exact rhyme with each other

*March 15, 2017*

**english answer check please, 4 questions**

1. To plan your time for a research project, it is best to (1 point) divide the time spent on each step evenly. keep your deadlines flexible. start at the beginning and plan from there.***** work backward. 2. Which of the following is not a guideline for choosing a research ...

*March 15, 2017*

**Science**

The image above shows the movement of a wave over three seconds. What is the frequency of the wave? A. 2 hz B. 5 hz C. 1 hz D. 3 hz

*March 15, 2017*

**World History**

Did you finish the test? What were the answers?

*March 15, 2017*

**World History**

Did you finish the test? What were the answers?

*March 15, 2017*

**English **

The students elected him secretary.

*March 15, 2017*

**physics help**

A 1.2-kg block slides on a horizontal surface with a speed of v=0.80m/s and an acceleration of magnitude a=3.2m/s2, as shown in (Figure 1) . a<__________ box _________>v What is the coefficient of kinetic friction between the block and the surface? Express your answer to...

*March 14, 2017*

**Science**

Which of the following boxes below represent a stable system? Describe how a disturbance to this box would affect it. Use the terms center of mass and equilibrium in your response. Box A: Shaped like a diamond on a flat surface with an arrow pointing downwards. Box B: A square...

*March 14, 2017*

**physics **

A 9.8-kg monkey hangs from a rope, as shown in (Figure 1) . The tension on the left side of the rope is T1 and the tension on the right side is T2. In the figure, ?=15? and ?=23?. Determine the tension T1. Express your answer to two significant figures and include appropriate ...

*March 14, 2017*

**physics**

please help The pulley system shown in the figure is used to lift a m= 67-kg crate. Note that one chain connects the upper pulley to the ceiling and a second chain connects the lower pulley to the crate. Assume the masses of the chains, pulleys, and ropes are negligible. ...

*March 14, 2017*

**physical science**

dsf

*March 14, 2017*

**Math**

C is correct Solution: 19/25*25000=19000

*March 14, 2017*

**algebra**

-1/5x+5/2=11/5

*March 14, 2017*

**math**

Given: ?ABC is isosceles m?ACB = 120° m?BMC = 60° CM = 12 Find: AB is it 15?

*March 14, 2017*

**Java**

Which of the following classes best represents rare and serious internal system errors? Error Throwable RuntimeException Exception I think it may be Error or Throwable. Been having alot of trouble with this class lately, help would be appreciated. ~Thank you.

*March 14, 2017*

**math**

A frame is 4in. tall and 3in. wide. It it is enlarged to a height of 16in., then how wide will it be?

*March 14, 2017*

**math**

3 in. wide

*March 14, 2017*

**math**

A frame is 4in. tall in wide. If it is enlarged to a height of 16in., then how wide will it be?

*March 14, 2017*

**math**

thank you ms sue

*March 14, 2017*

**math **

Conversions in the Metric System

*March 14, 2017*

**math **

the scale of a map is given as 1:20,000 two cities are 5cm apart on the map. find the actual distance between them

*March 14, 2017*