Sunday

February 19, 2017
Total # Posts: 2,421

**Chem**

How do peroxides differ from other group of oxide?

*February 17, 2017*

**basic calculus**

A page is to contain 54 square centimeters of printed material. If the margins are 1 cm at the top and bottom and 0.5 cm at the sides, find the most economical width of the page (in cm).

*February 11, 2017*

**Physics**

Explain in detail how you would find the density of an unknown high-density object if you had only the objects listed below.If you show calculations, make sure you define your variables.Assume all containers are large enough to hold the object.... You have: 1. - A spring scale...

*February 6, 2017*

**Physics**

V=m/d I understand how to solve for volume but there doesn't seem to be a definitive mass for air and helium in this answer, can I get some more help please? Or should I just do two equations (1.25=800/v and .18=800/v) but then what do I do? Im a little confused

*February 6, 2017*

**Physics**

You want to carry an 800kg object into the air using a helium balloon. What size of a helium balloon (I'm looking for volume) would be required to accomplish such a task? Assume the density of air is 1.25 kg/m3 and the density of helium is 0.18 kg/m3.

*February 6, 2017*

**Math**

The formula for the volume of a cube is V equals S3 where X represents the side length of the cube find the volume of a cube with side length of 0.5 millimeters

*February 6, 2017*

**physics**

Calculate the rotational inertia of a wheel that has a kinetic energy of 24,400 J when rotating at 677 rev/min. I know that I = mr^2 and that T = Ia; also I calculated 677rpm to be 70.9 radians/sec. But I don't understand how to integrate KE into this.

*February 5, 2017*

**Math**

fred is more than 3 years more than twice the age of jane. the sum of their ages is 48. how old is each?

*January 29, 2017*

**Physics**

A car mass of 900kg travelling at 15m/s crashes into a wall and comes to rest in 0.3s. Calculate the average decelaration. Calculate the average force exerted

*January 27, 2017*

**social studies**

The answer are D, C, D, and A

*January 23, 2017*

**science **

Calculate the work done in each of the following situations. (a) A horse pulls a wagon with a force of 1200 N and moves it 15 m. (b) A cable lifts an elevator 16 m by using a cable with a tension force of 2500 N. -How much work is required to lift a 35-kg object from the ...

*January 18, 2017*

**Math- Inequalities**

Hey, how would I start off solving (x-5)(x+2)<0???

*January 17, 2017*

**U.S history**

what are the powers of Maryland General Assembly and Baltimore city council.

*January 17, 2017*

**Computing **

Pseudocode to describe how to get the information and output the area of a triangle. How do integrated development environment(IDE) help to create maintainable code? Thank you.

*January 13, 2017*

**Computing **

Pseudocode using a repeat-until loop to output the first five square numbers. Thank you.

*January 12, 2017*

**Computing **

Pseudocode to describe how to get the information and output of a triangle. Thank you.

*January 12, 2017*

**C**

Pseudocode: Write a pseudocode to describe how to calculate the average of 10 numbers. Thank you.

*January 12, 2017*

**Computing **

How do features of ide help to create machinable code?

*January 12, 2017*

**Computing **

What is the importance of file standards when including external files on a website page. Thank you.

*January 12, 2017*

**Physics**

An empty bottle weighs 20g and 60g when filled completely with water.What will it weigh when filled completely with mercury? 20÷60=0.3

*January 7, 2017*

**pre-algebra**

6 blank 3 divided by 9 blank 4 + 4=12 what are the blanks

*January 6, 2017*

**4th Grade Math**

Ben is helping plant tulips. He plants bulbs in two rows and has one bulb left over. So he tries again. He plants bulbs in three rows and has one bulb left over. So he tries again. He plants bulbs in four rows and has one bulb left over. So he tries again. He plants bulbs in ...

*January 4, 2017*

**Social studies**

Hey is right

*December 31, 2016*

**MATH 2**

It is found that the number of raisins in a box of a popular cereal is normally distributed, with a mean of 133 raisins per box and a standard deviation of 10 raisins. My cereal box has 147 raisins. What is the z-score for this box of cereal?

*December 15, 2016*

**science**

What was the answer?

*December 12, 2016*

**Math**

what times 35 to make 50

*December 9, 2016*

**Business Finance**

1. What is the actual present value of the lien ($8,000, 30 yrs @ 12% interest – do not calculate simple interest!)? 2. How much will the conservator have after the sale of the property closes?

*December 8, 2016*

**math**

A sphere of radius 7 m is circumscribed about a regular triangular prism. If the base edge of the prism is 1 m, find the volume of the prism (in m3). Round off your answer to four decimal places.

*December 5, 2016*

**Math**

Find the volume of the solid of revolution obtained by revolving the plane region R bounded by y= x^5, the y-axis, and the line y=3 about the x-axis I've gotten 15/7(3^(2/5))pi, but it's not right. Please help

*December 2, 2016*

**Calculus**

Find the volume of the solid of revolution obtained by revolving the plane region R bounded by y= x^5, the y-axis, and the line y=3 about the x-axis So far: y=x^5 is equal to x=5th root y. I've plugged that in to pi(r^2)h, and got V = pi ?[0,3] y^(2/5) dy. so far I've ...

*December 2, 2016*

**CHECKA Math!**

32.4%

*November 29, 2016*

**Math**

Please help someone

*November 27, 2016*

**Math**

I'm rounding to nearest hundred

*November 27, 2016*

**Math**

Four ways to round to 400

*November 27, 2016*

**Math**

what two numbers rounds to 600

*November 27, 2016*

**Math**

I am rounding to nearest 100

*November 27, 2016*

**Math**

What two numbers round to 700

*November 27, 2016*

**Calculus - Fundamental Thm of Calc**

Suppose F(t) is an antiderivative of t^{3}. Then F'(t)= t^3. According to the Second Fundamental Theorem of Calculus, x ? (t^3)dt = ??? 1 Answer using the function F

*November 23, 2016*

**math**

1/2 < -7/10 is this a true statement

*November 18, 2016*

**Physics**

An object is projected from a satellite orbiting 200 km above the surface of the earth. The object has a speed relative to the Earth of 2.85×104 m/s. What is its speed when it is very far from the earth?

*November 17, 2016*

**Psychics**

Super man lived on Krypton where acceleration due to gravity is 23.6 m/s^2. If a woman falls from a building that is 88.3 meters tall, how long does he have to save her before she hits the ground?

*November 16, 2016*

**Calc**

Find the values of C guaranteed by the mean value theorem for integrals. f(x)=x^3 [0,3]

*November 16, 2016*

**Math**

Rectangle perimeter and area length =2ft width =14in

*November 14, 2016*

**Physics**

A force of 123 N acts on a 10.0kg object for 45.6 meters. If the objects starts at rest, and the surface is flat and frictionless, how fast is the object moving after the force is removed. I got acceleration to be 12.3, but I am not sure how to move on with the problem.

*November 13, 2016*

**Calculus**

True/false: x^2-3 is concave up on the interval (-1,1) The second derivative of x^2-3 is just 2. How do I determine concavity of a function when I can't set it equal to 0? And then how do I answer this question when it's asking for a specific interval?

*November 11, 2016*

**Spanish**

D A A C B

*November 7, 2016*

**Chemistry**

In a similar experiment, a sample of tin metal was dissolved in nitric acid to produce 23.00 mL of solution containing Sn2+. Titration analysis resulted in the calculation that the concentration of Sn2+ in this solution was 0.65 mol/L. b. What mass of tin was used to make the ...

*November 5, 2016*

**Calculus - Special sum formulas**

Find a formula for Sum_{j=1}^n (j+3) (j-4) So far, I have foiled to j^2-j-12. Thus,Sum_{j=1}^n(j^2) - Sum_{j=1}^n(j) - Sum_{j=1}^n(12). From Special Sum formulas, I have gotten to n(n+1)(2n+1)/6 - n(n+1)/2 - 12n What do I do from here?

*November 4, 2016*

**Calculus - Differential Equations**

Use separation of variables to find the solution to the differential equation: 4 (du/dt) = u^2, subject to the initial condition u(0)=6.

*November 4, 2016*

**Calculus**

Find the xy-equation of the curve that passes through (-2, -2) and whose slope at any point on the curve is equal to 5 times the x-coordinate of that point

*November 4, 2016*

**Calc**

A rectangular package to be sent by a postal service can have a maximum combined length and girth (perimeter of a cross section) of 90 inches (see figure). Find the dimensions of the package of maximum volume that can be sent. (Assume the cross section is square.)

*November 3, 2016*

**Calculus**

True or False If F(x) and G(x) are antiderivatives of f(x), then F(x)=G(x)+C If f'(x) = g(x) then integral g(x) dx = f(x) + C Integral f(x) * g(x)dx = integral f(x)dx * integral g(x)dx I have a feeling it's False True True

*November 2, 2016*

**Math**

Kate cycles the first 350 km of a 470 km journey at a certain average speed and the remaining distance at an average speed that is 15 km/h less than that for the first part of the journey. If the time taken for her to travel each part of her journey is the same, find the ...

*November 2, 2016*

**Calc**

If a car is driving in a straight line with constant acceleration a, initial velocity v0, and initial position s0, find a formula for the position function of the car. How would I solve this equation?

*November 1, 2016*

**chemistry**

what is the name of this coordination compound [CoSO4(NH3)5]Br?

*October 31, 2016*

**Math**

Ten analog measurements whose bandwidth is 4 kHz are to be transmitted simultaneously through a cable by time division multiplexing using PCM. Each message is sampled at a 10 kHz rate and amplitude quantized into 128 levels. The pulses are shaped with a near-ideal low pass ...

*October 31, 2016*

**Math**

We are given the problem of communicating a series of symbols, each of which can take on one of 512 values at a rate of f_s =〖10〗^5 symbols/s. A) What is the required bandwidth if PCM is used with m=1? B) Repeat for PAM with m=2, if each pulse can take on 8 ...

*October 31, 2016*

**Math**

A sausage sample was found to contain 65% moisture, based on fresh weight. The sausage was dried in an oven until its moisture content was 10%. A 2.0 g portion of the dried sausage was extracted with the Soxhlet method to determine the amount of crude fat. A clean Soxhlet ...

*October 29, 2016*

**History**

Thanks Ms.sue

*October 22, 2016*

**History**

How did George Mason influence the creation of Bill of Rights? A.He refused to sign the United States Constitution. B.He encouraged others to opposed the ratification of the Constitution. C.He assembled a anti-federalist convention in Virginia to discuss the matter. D.He wrote...

*October 22, 2016*

**chemistry**

0.350 L of 0.470 M H2SO4 is mixed with 0.300 L of 0.250 M KOH. What concentration of sulfuric acid remains after neutralization?

*October 18, 2016*

**Maths**

A plane flies a course of 346 degrees and then turns through 30 degrees in the clockwise direction. Find its new bearing. Since the plane from starting point covers a bearing of 346 degrees it's now going to be in the NW direction but going 30 more degrees clockwise that...

*October 18, 2016*

**Math**

the towns highway department marks a new road with reflective markers the road is 6 3/4 miles in length the markers are spaced every length 1/8 of a mile

*October 14, 2016*

**econ**

given p=68-4qd-qd^2 p=12+2qs+qs^2 where p is the price qd is the quantity demanded qs is the quantity supplied determine the uquilibrium and the quantity of the commodity

*October 13, 2016*

**Basic math**

A ladder 10 feet long leans against a building the base of the ladder is 6 feet how high is the paint where the ladder touches the building

*October 13, 2016*

**Basic math**

A 15 foot ladder propped against a wall the base of the ladder is 3 feet from the wall how far up the wall does the ladder reach.

*October 13, 2016*

**math 1**

What is the value of the expression below? (2^-4)(3^0)(7)/(5^-2)(4^-2)(175) Remember: Negative exponents in the denominator move to the top with its base, and negative exponents in the numerator move to the bottom with its base. In both cases you should drop the negative sign...

*October 12, 2016*

**math 1**

How do i put a pitcure because the problem is a picture

*October 12, 2016*

**math 1**

Please help with this i don't under stand it at all Hint: Copy and paste in in the search bar.

*October 12, 2016*

**math 1**

file:///C:/Users/Elvis/Downloads/34c349524b928a5f67768aa8eb6e1c02.png

*October 12, 2016*

**math**

Answer is -16 :)

*October 12, 2016*

**math**

ive got it ive seen my mistake

*October 12, 2016*

**math**

Find the values of x and y in the two equations below then answer the question that follows. 2^-3=1/x 7^y=1/49 What is the value of xy ? For the first problem i got 8. For the second one i got 1/343 I don't know what im doing wrong or right. Can you please show me with work.

*October 12, 2016*

**Chemistry**

Based on the standard reduction potentials given below, which species is most likely to be oxidized? Ag+ + e- → Ag, Eo= 0.80 V Cu2+ + 2e- → Cu, Eo= 0.34 V Zn2+ + 2e- → Zn, Eo= -0.76 V Cd2+ + 2e- → Cd, Eo= -0.40 V I thought the answer would be Zn2+ that...

*October 12, 2016*

**Chemistery**

Calculate the concentration of O 2 if K c = 270 for the reaction 2SO 2 (g)+O 2 (g)⇌2SO 3 (g) .

*October 10, 2016*

**College Algebra**

Tammy can do a certain job in 6 hours. Kris can do the same job in 8 hours. If Tammy and Kris work together to complete the same job, how many hours will it take for them to complete it?

*October 8, 2016*

**Calculus - Approximation**

Use linear approximation, i.e. the tangent line, to approximate cubed root { 1.1 }. The equation of the tangent line to f(x) at x = 1 can be written in the form y = mx+b. Show your work. Do not use a calculator.

*October 7, 2016*

**Math - Calculus 1**

Approximate using derivatives. (Must show work using derivatives!) Do not use a calculator: (1.1)^4 - (1.1)^2

*October 7, 2016*

**Calculus - Related Rates**

Suppose that you are watching a spaceship take off. You are 100 meters from the launch pad, and you measure the angle made by the rocket and the ground to be increasing at a rate of (d)(theta)/dt = 0.1 radians per second. What is the velocity of the rocket when theta = pi/4?

*October 7, 2016*

**Physics**

usain bolt set the world record for the 100m dash, proving to be the fastest man in history, with a time of 9.58s. what was bolt's average speed in miles per hour? (his initial speed was 100m/9.58s I got 23.35 mph for this I need help with this. VVVVVVVVVVVVVV assume that ...

*October 4, 2016*

**math**

Joe is playing a game with a regular die. if the number that turns up is even he will gain 5 times the number that comes up. if it is odd, he will lose 10 times the number that comes up. he tosses a 3. express the results as an integer

*October 4, 2016*

**College math**

A bag contains 9 white 7yellow marbles,8 green marbles. If one marble is drawn from the bag then replaced, what is the probability of drawing a white marble then a green marble?

*October 1, 2016*

**Help with compute probability**

Compute the probability of randomly drawing five cards from a deck and getting 3 Aces and 2 Kings. (Give your answer as a fraction.) Probability

*October 1, 2016*

**Chemistry**

So I've done as you said and have come up with the following: C (g) = 0.0437g H (g) = 0.00583g O (g) = 0.01167g C(mol)=0.00364mol H(mol)=0.00578mol O(mol)=0.000729 I then divide for the ratio (Mm=m/n) and get 12 for C, 1 for H, and 16 for O, making the formula: C12HO16, ...

*September 22, 2016*

**Chemistry**

Sorry, it's 0.06120 g produced 0.1601 g of CO2 and 0.05243 g of H2O

*September 22, 2016*

**Chemistry**

Hey, can someone help me with this? A compound containing only C, H and O was subjected to combustion analysis. A sample of 6.120Ã—10^-2 g produced 1.601Ã—10^-1 g of CO2 and 5.243Ã—10^-2 g of H2O. Determine the empirical formula of the ...

*September 22, 2016*

**Precalculus**

Thank you so much!!! I see what I was doing wrong now. PS: You have good handwriting :)

*September 19, 2016*

**Precalculus**

Yeah, I tried drawing a diagram, but I just keep getting confused.

*September 19, 2016*

**Precalculus**

In triangle ABC, we have AB=3 and AC=4. Side BC and the median from A to BC have the same length. What is BC? Please help, I have no idea where to start.

*September 19, 2016*

**math**

a man sleeps 8 hours a day. how many hours can he sleep in a year?

*September 19, 2016*

**math**

Sara is thinking of a number when she rounds her number to the nearest hundred,she gets 700.What is the greatest number Sara can be thinking of?Explain

*September 13, 2016*

**Please check my answer(Social Studies)**

So what's the answers

*September 13, 2016*

**Physics**

A drag racer starts her car from rest and accelerates at 4.8 m/s 2 for the entire distance of 409 m. How long did it take the car to travel this distance?

*September 13, 2016*

**Science**

Which of the following means using specific observations to make generalizations? A: BIAS B: Subjective C: Deductive Reasoning D: Inductive resoning is the answer c?

*September 12, 2016*

**Social Studies**

yes he is correct 5 is c

*September 12, 2016*

**home economics**

what are the branches of fibre

*September 11, 2016*

**Physics**

A block of mass m1= 3.70kg rests on a 30degree incline and is held stationary by a mass of 1.3kg hanging vertically over a frictionaless pulley at the top. Calculate the value of u (coefficent of friction)

*September 8, 2016*

**Physics**

56.7 m

*September 7, 2016*

**Math**

How do you write 4,000,000,000 + 20,000,000 + 500,000 + 60,000 + 1,000 + 300 + 40

*August 30, 2016*

**Chemistry**

24.332

*August 28, 2016*