Wednesday

January 18, 2017
Total # Posts: 5,088

**Physical Science**

A step-up transformer has primary coil with 15 turns. How many turns would be required in the secondary coil to increase the voltage from 60 v to 160 v? 15 x=160/80 x=80/15 x=?

*January 12, 2017*

**Math**

Convert $e^{-\pi i}$ to rectangular form. Not sure how to start this problem, should I use Euler's formula? Can anyone help provide the steps please? Thanks

*January 11, 2017*

**IPC**

The value of acceleration due to gravity (g) on a point 10,000 kilometers above sea level is about 1.49 meters/second2. How much will an object, which weighs 98 newtons on the surface of Earth, weigh on this point? The value of acceleration due to gravity on Earth is 9.8 ...

*January 11, 2017*

**Math**

Suppose that 32 feet of fencing is available to enclose a rectangular garden., one side of which will be against the side of a house. What dimensions of the garden will guarantee a maximum area?

*January 9, 2017*

**Math**

A shop owner blends three types of coffee,A,B,C.in the ratio 3:5:7 a) calculate the weight of each type of coffee in 45kg of three blended mixture. b) given that type A coffee cost $7 per kg, type B coffee costs $10 kg and type C coffee costs $13 per kg, calculate the cost per...

*December 31, 2016*

**micro economics I**

show the MRS for Cobb Douglass preference is ax2/bx1

*December 28, 2016*

**maths**

The line segment connecting A(-18,8) and B(-10,-8) is divided in the ratio 1:3 by point C. The coordinates of C are... Please show your working and thx for taking your time to answer this question.

*December 23, 2016*

**Algebra 1**

A square painting is surrounded by a frame. the outside edges of the frame are x inches in length, and the frame is 3 inches thick. What is the total area of the frame? A)-12x+36 B)12x-36 C)x^2+12x+36 D)x^2-12x-36 Is it C or D?

*December 22, 2016*

**Algebra**

Wait, nevermind my previous answer...is it B?

*December 22, 2016*

**Algebra**

What type of polynomial is this? 2 - 5x^3 + 6x A)not a polynomial B)cubic trinomial C)quadric trinomial D)fourth-degree trinomial Since the degree is 4, I think the answer is D. Is this correct?

*December 22, 2016*

**Algebra 1**

GCF*

*December 20, 2016*

**Algebra 1**

Find the GFC of the terms of the polynomial. 14z^5-70z^4+10z^3 Is the answer 14? I'm not really sure. Can someone please help?

*December 20, 2016*

**Management**

can you tell me the reason

*December 17, 2016*

**Management**

planning about the companys goal

*December 17, 2016*

**Management**

Is pressure of work barrier for planning

*December 17, 2016*

**Management**

Is pressure of work a barrier for planning?

*December 17, 2016*

**algerbra**

an object is projected upward at a rate of 96 feet per second. find the time when it is 144 feet above the ground

*December 15, 2016*

**algebra**

1/b(2b-10)=17 1/b*2b=2 1/b*10=10/b 2-10/b=17 -10/b=15 The answer is -2/3

*December 14, 2016*

**pre-calculus**

A rectangular box has a perimeter of 50 inches. Find the length and width of the box that would give the maximum area. Find the maximum possible area of the box.

*December 12, 2016*

**pre-calculus**

A rectangular box has a perimeter of 36 inches. Find the length and width of the box that would give the maximum area. e. l = 9, w = 9 f. l = 81, w = 9 g. l = 27, w = 9 h. l = 18, w = 18

*December 12, 2016*

**pre-calculus**

A rectangular box has a perimeter of 36 inches. Which of the following equations represents the area of the rectangular box in terms of its width, w? a. A = 36w - w2 b. A = 18w - w2 c. A = 36 - w2 d. A = 18 - w2

*December 12, 2016*

**Chemistry**

Thank you!

*December 12, 2016*

**Chemistry**

What is the concentration of Pb in mg/L , if you have 25 mg Pb in 5kg of seawater? (note: density of seawater is 1.025 kg/L)

*December 12, 2016*

**Chemistry**

Using the fact that fresh water has a density of 1000 kg/m3 , show that 5ppm Pb = 5 mg/L Pb .

*December 12, 2016*

**precalculus**

convert r sin? = 2 to rectangular form

*December 9, 2016*

**pre calculus**

what is the distance between the pole and the directrix of r = 4/-2-6sintheta

*December 9, 2016*

**precalculus**

Find the eccentricity of the function r = 4/-2-6sintheta

*December 9, 2016*

**LA**

How is Barrio Boy characteristic of nonfiction and "A Day's Wait" characteristic of fiction? Ernesto in Barrio Boy is a believable character, while the boy in "A Day's Wait" ...

*December 8, 2016*

**LA Help!**

we need help coming up with an idea.

*December 6, 2016*

**Language Arts**

Your answers are correct!

*December 5, 2016*

**English**

How do the themes like the will to live, the importance of storytelling, and the nature of religious belief help drive the plot forward? I don't really know how to answer this.

*December 4, 2016*

**Math**

Elena has 15 more dimes than nickels. If she has $2.55, how many nickels does she have?

*November 30, 2016*

**Environmental Science**

All is correct except for 9 which is false

*November 25, 2016*

**math**

(x+4)(x-3) x=-4 x=3

*November 24, 2016*

**Spanish**

Ok, thank you. (=

*November 22, 2016*

**Spanish**

Thanks! Can you answer another question? What is the difference between a plaza in a Spanish speaking country and one in Los Estados Unidos? A)in Los Estados Unidos, a plaza does not serve a social purpose*** B)in Los Estados Unidos, only small towns have plazas C)in Los ...

*November 22, 2016*

**Spanish**

**Image of girls at a cafe.** Donde estan las chicas? A)en el cafe*** B)a la cafe C)en la cafe D)en al cafe Am I correct?

*November 22, 2016*

**math**

Water is being pumped at a rate of 100L/H. How long will it take to pump 550L

*November 20, 2016*

**Spanish**

Which of the following best describes what a movie theater in a small Honduras town might be like? a) it would host an international festival b) it would show one movie per week c) it would be on the outskirts of town d) it would only open on weekends*** Pls, help!

*November 17, 2016*

**Spanish**

Please help, I would really appreciate it!

*November 17, 2016*

**Spanish**

Which word best completes the following sentence? The standard variety of Spanish is considered _______. a. natural b. colorful c. easy*** d. neutral I'm not really sure about this one, someone pls help!?

*November 17, 2016*

**Social Studies**

Come on Janelle, you could have googled it

*November 17, 2016*

**ALGEBRA**

A baseball team has 13 players; how many possible batting orders can the coach make if there are 9 players in the batting lineup?Hello can you help with this problem i try different ways to solve it but it is not match with my answers A. 235,368 B. 1,235,520 C. 879,523 D. 514,...

*November 16, 2016*

**math**

can somebody check this problem thank you.

*November 15, 2016*

**algebra**

4b/2 + 3 = 11 + b i know the answer is b=8 but i want to know how

*November 14, 2016*

**Spanish**

Writeacher?

*November 14, 2016*

**Spanish**

Ok. #1 ser and #2 is estar?

*November 14, 2016*

**Spanish**

So it would be ser?

*November 14, 2016*

**Spanish**

Sorry, just saw your reply, ok. The verb is "is", therefore in Spanish that would be estar or ser?

*November 14, 2016*

**Spanish**

Also, Which verb would you use to explain that the movie is being shown in the theater? A)deber B)estar C)ser*** D)hacer Am I correct on this one?

*November 14, 2016*

**Spanish**

Which Spanish verb would you use to ask the following question? "What is your name?" A)estar B)ser C)hacer D)tener Is it D? I'm not sure, can someone pls help?

*November 14, 2016*

**physics**

thank you

*November 13, 2016*

**physics**

What is the direction and magnitude of the net force acting on the hot air balloon? It has an arrow up with 6300, an arrow down with 3200, an arrow to the right of 1350 and an arrow left with 745. Is this how to do it and if so, how do I convert the sin of theta into degrees. ...

*November 13, 2016*

**physics**

vf2-vi2 /2deltaX (0-48)2( (103 m/km)2 (1 h/3600 s)2/2(14.9m) -4.8x103m/s2 is what I had so far. It didn't save when I posted.

*November 13, 2016*

**physics**

During a crash, a race car driver decelerates from 48.0 m/s to 0 m/s in a distance of 14.9 m. If the drivers mass is 70.0 kg, what is the average force acting on the driver during the crash? This is what I have so far. Am I starting right?

*November 13, 2016*

**Georgia State History**

Thank you. That's very helpful...(=

*November 10, 2016*

**Georgia State History**

I have to write an essay about MLK Jr. and I need to have a speech he made in Georgia. Can someone please help me and give me any suggestion of speeches made by MLK Jr. in Georgia.

*November 10, 2016*

**Maths**

A length of timber is to be cut into 7 pieces using a hand saw. How many cuts will need to be made

*November 9, 2016*

**phisics**

a car starts from rest and is accelerated uniformly and the rest of 2m/s2 for 6seconds it then maintaining a constant speed for half a minutes.The brake are then applied and then vehicles unifomly restarted to rest in 5seconds.find maxmum speed in km/h and the total distance ...

*November 8, 2016*

**math**

Ellie and Sara see 8 birds in the tree. Ellie see 2 fewer birds than Sara .sara sees 5 birds how many birds does Ellie see

*November 7, 2016*

**Science**

Ok, thanks. (=

*November 7, 2016*

**Science**

A metal from group 1 and a nonmetal from group 17 are? A. Not likely to bond. B. Likely to form a covalent bond. C. Likely to form an ionic bond.*** D. Likely to form a metalloid. Is this correct?

*November 7, 2016*

**Language Arts**

Please help!!!

*November 6, 2016*

**Language Arts**

Can someone please help me? I would really appreciate it.

*November 6, 2016*

**Language Arts**

Which of the following excerpts from the selection use the active voice in the first sentence and the passive voice in the second? A)There is little, if any, "storm" in the new movie Storm Fever. Aren't actors supposed to act, and aren't directors suppose to ...

*November 6, 2016*

**Spanish**

Am I correct?

*November 5, 2016*

**Spanish**

What is the correct way to say "I prefer milk" in Spanish? A. Yo prefero leche B. Yo prefiero leche*** C. Yo preferir leche D. Yo priefero leche

*November 5, 2016*

**Calculus**

A particle is moving with acceleration a(t) = 24 t + 4. Its position at time t =0 is s(0) = 15 and its velocity at time t =0 is v(0) = 11. What is its position at time t = 9?

*November 4, 2016*

**Teas 6**

I'm taking teas 6 soon can semeone help plz

*November 2, 2016*

**piedad elementary school**

Which of the given fractions is NOT equal to 1/3? a.) 100/300 b.) 10/30 c.) 3/10 d.) 2/6?

*November 2, 2016*

**Algebra**

here's the table: Number of | Perimeter | Ordered | Pentagons | (y) | Pair | (x) | | (x,y) | 1 | 15 | (1, 15) | 2 | 24 | (2, 24) | 3 | 33 | (3, 33) |

*November 1, 2016*

**History**

Ok, thanks.

*October 31, 2016*

**History**

Am I correct?

*October 31, 2016*

**History**

Which statement best explains the reason the Americans were never able to capture St. Augustine in Florida. A) A lack of cooperation among commanders led to poor execution.*** B) Poor planning and incompetent leaders led to disastrous outcomes. C) The Americans were not as ...

*October 31, 2016*

**Algebra**

Cindy bought a car for $14000. The car is depreciating every year at a rate of 2%. Write an equation and what is the value of her car after 5 years.

*October 30, 2016*

**chemistry**

An 80.0-gram sample of a gas was heated from 25 °C to 225 °C. During this process, 346 J of work was done by the system and its internal energy increased by 8305 J. What is the specific heat of the gas?

*October 27, 2016*

**chemistry**

Liquid sodium is being considered as an engine coolant. How many grams of liquid sodium (minimum) are needed to absorb 7.00 MJ of energy (in the form of heat) if the temperature of the sodium is not to increase by more than 10.0 °C? Use CP= 30.8 J/(K·mol) for Na(l) ...

*October 27, 2016*

**chemistry**

When 1367 J of heat energy is added to 44.1 g of hexane, C6H14, the temperature increases by 13.7 °C. Calculate the molar heat capacity of C6H14.

*October 27, 2016*

**chemistry**

In a constant-pressure calorimeter, 60.0 mL of 0.300 M Ba(OH)2 was added to 60.0 mL of 0.600 M HCl. The reaction caused the temperature of the solution to rise from 21.75 °C to 25.84 °C. If the solution has the same density and specific heat as water (1.00 g/mL and 4....

*October 27, 2016*

**chemistry**

An 80.0-gram sample of a gas was heated from 25 °C to 225 °C. During this process, 346 J of work was done by the system and its internal energy increased by 8305 J. What is the specific heat of the gas?

*October 27, 2016*

**chemistry**

If you combine 360.0 mL of water at 25.00 °C and 120.0 mL of water at 95.00 °C, what is the final temperature of the mixture? Use 1.00 g/mL as the density of water.

*October 27, 2016*

**Math**

A hemispherical tank has a diameter 10cm is fixed by water issuing from a pipe of radius 20cm at 2m per second. Calculate currently to 3.s.f the time in mind Tessa it take to fixed the tank.

*October 27, 2016*

**Calculus**

The measurement of the radius of a circle is 16 inches, with a possible error of .25 inches. Use differentials to approximate the possible propagated error in computing the area of the circle and find the percent error. I've gotten to 2Pi*16*.25 but don't know what to ...

*October 25, 2016*

**Social Studies**

He didn't try hard enough.

*October 24, 2016*

**algebra/AP physcis**

how do i solve for v in the equation: v^2/.6=1.2v^2/.6 +9.8

*October 20, 2016*

**Physics**

A stone is tied to a string (length = 0.600 m) and whirled in a circle at the same constant speed in two different ways. First, the circle is horizontal and the string is nearly parallel to the ground. Next, the circle is vertical. In the vertical case the maximum tension in ...

*October 20, 2016*

**All of math**

What are all the answers to unit 4 lesson 11

*October 20, 2016*

**Chemistry**

I have a 0.6573g mixture of NaHCO3 and Na2CO3. Calculate the mass of NaHCO3 and Na2CO3 in the unknown mixture.Also calculate the mass of NaCl formed in the reaction of the mixture and HCl.

*October 20, 2016*

**PHYSICS- PROJECTILE MOTION**

Crickets Chirpy and Milada jump from the top of a vertical cliff. Chirpy just drops and reaches the ground in 3.10 s , while Milada jumps horizontally with an initial speed of 89.0 cm/s. How far from the base of the cliff will Milada hit the ground? Ignore air resistance.

*October 20, 2016*

**PHYSICS- PROJECTILE MOTION**

A physics book slides off a horizontal table top with a speed of 1.90 m/s. It strikes the floor after a time of 0.410 s. Ignore air resistance. a) Find the magnitude of the horizontal component of the book's velocity just before the book reaches the floor. b) Find the ...

*October 20, 2016*

**chemistry**

what is the skeleton chemical equation of this? And Balanced equation. Copper (ii) chloride + Lithium --> Lithium Chloride + Copper

*October 18, 2016*

**chemistry**

what is the skeleton chemical equation of this? And Balanced equation. Copper (ii) chloride + Lithium --> Lithium Chloride + Copper

*October 18, 2016*

**Math**

nothing

*October 17, 2016*

**Math**

thank you and sorry damon

*October 17, 2016*

**Math**

Jean Claude equally shared a box of chocolates with two of his friends. The box weighed 9/5 pounds. How many pounds of chocolate did each person receive?

*October 17, 2016*

**Statistics**

A science teacher gives a test with 15 questions. This teacher is a hard grader. The teacher assigns points in the following manner: a correct answer = +1 point, an incorrect answer = -1 point, no answer = 0 points. So scores on the test could range from +15 to -15. The ...

*October 14, 2016*

**Statistics**

Suppose that 40 students take a quiz and everyone in the class scores an 80. The standard deviation of scores for this quiz is: 80 2 0

*October 14, 2016*

**Statistics**

A college statistics class conducted a survey of how students spend their money. They asked 25 students to estimate how much money they typically spend each week on fast food. They determined that the mean amount spent on fast food is $31.52 with a standard deviation of $21.60...

*October 14, 2016*

**maths**

A man buys lemon at 6 for rs 10 and sells at 8 for rs.15 find his gain percent

*October 10, 2016*

**chemistry**

Consider the following reaction. 4Fe + 3O2 2Fe2O3 a. How many moles of O2 are required to react completely with 46.7 mg of Fe? How many grams Fe2O3, are produced from the complete reaction of 20.1 g of Fe?

*October 9, 2016*