Friday

March 6, 2015

March 6, 2015

Total # Posts: 923

**math**

if the speed of a comet at perihelion (the closest orbital point to the sun) is 98000 mi/h. How far will the comet travel in 30 sec?
*August 9, 2012*

**maths**

a ladder 15 meters long just reaches the top of a vertical wall. if the ladder makes an angle of 60 degrees with the wall. find the height of wall.....
*August 7, 2012*

**math ( pre algebra )**

It makes a capital h
*July 6, 2012*

**pre cal**

Verify each identity sin^x+siny/sinx-siny=tan(x+y/2) (times) cot(x-y/2)
*June 30, 2012*

**Finance**

a client comes to you for an investment advice on his 500,000 winnings from the lottery. he has been offered the following options. what would be the best option 6% compounded interest quarterly for 5 years or 8% compounded annually for 5 years or 14.5% simple interest for 10 ...
*June 29, 2012*

**Math**

Tom needs a pipe that is 21/24 of an inch in diameter. The store has 7/8 inch pipe. Should he buy it?
*June 27, 2012*

**Math**

Mr. Munoz has a 1/16 inch drill bit and a 3/32 inch drill bit. Which will make a bigger hole?
*June 27, 2012*

**english**

Choose the sentence in which the verb has a direct object. A. George was furious. B. I walked away. C. They won the game. D. She is insecure.
*June 26, 2012*

**english**

Which sentence below contains a correctly used modifier in italics? A. Joe looked sad at his broken bike. B. The sauce tasted bitterly, and I couldn't swallow it. C. He spoke sharply to his sister. D. I feel badly because I lost the race.
*June 26, 2012*

**English**

Which of the following sentences uses a preposition properly? A. Connor waited in line while Ava parked the car. B. Where is David at? C. There was a big argument between Megan, Abira, and Lena. D. I might of lent him the book, if he had asked
*June 26, 2012*

**help please :)**

those are the only choices
*June 20, 2012*

**help please :)**

The U.S. Congress added disability insurance to the Social Security Act in 19____. A. 35 B. 54 C. 65 D. 72 i got A.
*June 20, 2012*

**algebra**

go to hell
*June 20, 2012*

**math**

Which one of the following statements best describes what a budget is? A. A method of figuring out the inflation rate. B. An organized plan for spending money. C. A way to keep people from really enjoying life. D. A plan for saving money.
*June 14, 2012*

**budgeting**

thanks
*June 14, 2012*

**budgeting**

A. net B. disposable C. budgeted D. taxable
*June 14, 2012*

**budgeting**

Emilio is employed as full-time mechanic in the service department of an auto dealer. In his spare time, he draws political cartoons and sells them to the weekly newspaper in his home town. He is paid $35 for each cartoon, which amounts to an additional $1,820. The newspaper ...
*June 14, 2012*

**physics**

A girl throws a water-filled balloon at an angle of 50.0 degree(s) above the horizontal with a speed of 12.0 m/s. The horizontal component of the balloon's velocity is directed toward a car that is approaching the girl at a constant speed of 8.00 m/s. (See figure) (a) If ...
*May 17, 2012*

**Algebra- MAT 116**

I need Help with this question: Find the value 0.2y(y to the second power)+ o.3y (y to the second power)-0.1y (y to the second power)
*May 14, 2012*

**MAT 116**

thank you!
*May 14, 2012*

**MAT 116**

Please HELP!! traslate six times a number subtract three the number then simplified the expression
*May 14, 2012*

**MAT 116**

Use the distributive property to rewrite the expression (a+8)4= (simplify answer)
*May 14, 2012*

**Global History**

Thanks for trying to help, however a five year old could write a wikipedia article and therefore it is not realiable and banned at my school. It's fine, though, because a friend pointed me elsewhere (an edu) so thanks again.
*May 14, 2012*

**Global History**

Definition and importance in Japanese history: • Ethnocentrism • Zaibatsu I have already looked in my textbook, without success. Please no links. My computer is extremely slow and links screw it up. Thanks!
*May 14, 2012*

**Global History**

What was the effect of Japanese imperialism in the early 1900s?
*May 14, 2012*

**Phizzics....**

A ball is thrown straight up from ground level. After a time 4.1 s, it passes a height of 157.1 m. What was its initial speed? The accelera- tion due to gravity is 9.8 m/s2 . what is its initial speed
*May 10, 2012*

**Parts of speech**

People express thoughts mainly by using
*May 8, 2012*

**Chemistry**

how many grams of solute is in 64.3 mL of 0.0238 molarity KOH?
*May 2, 2012*

**Physics**

A small cork with an excess charge of +6.0 µC is placed 0.25 m from another cork, which carries a charge of −3.2 µC. What is the magnitude of the electric force between the corks? The Coulomb constant is 8.98755 × 10 9 N · m2 /C 2 . Answer in ...
*April 29, 2012*

**Physics**

Where did you get 210?
*April 29, 2012*

**Physics**

It says its wrong.
*April 29, 2012*

**Physics**

A balloon rubbed against denim gains a charge of −2.0 µC. What is the electric force between the balloon and the denim when the two are separated by a distance of 5.0 cm? (Assume that the charges are located at a point.) The value of the Coulomb constant is 8.98755...
*April 29, 2012*

**MATH**

The cumulative number of car accidents from 2000 to 2010 can be modeled by the quadratic expression, C=-42x^2+924x+14,112, where x=1 corresponds to 2001, and so on until x=11 corresponds to 2010. Find the number of cumulative car accidents in 2003. Use the table of values to ...
*April 29, 2012*

**MATH**

If C dollars are deposited in an account paying r percent annual interest, the amount after x years is A+C(1+r)*. Approximate the amount in the account after x years, when C=$100.00, r=19%, and x-15 years.
*April 29, 2012*

**MATH**

The cumulative number of car accidents from 2000 to 2010 can be modeled by the quadratic expression, C=-42x^2+924x+14,112, where x=1 corresponds to 2001, and so on until x=11 corresponds to 2010. Find the number of cumulative car accidents in 2003. Use the table of values to ...
*April 29, 2012*

**MATH**

A rectangle pen for a pet is 5 feet longer than it is wide. Give possible values for the width W of the pen if its area must be between 266 and 750 square feet, inclusively. The width of the pen from the smaller value of the width is how many feet to the larger value of the ...
*April 29, 2012*

**math**

If C dollars are deposited in an account paying r percent annual interest, approximate the amount in the account after X years if c=$250, r=2.4% and x=23 years?
*April 20, 2012*

**math**

The population P in 1995 for a state is given along with r, its annual percentage3 rate of a continuous growth. P=16 millions, r=1.2% Write the formula f(x) =Pe^yx, where r is in a decimal notation, that models the population in millions x years in 1995.
*April 19, 2012*

**math**

In 2000 the population of a state was 5 million and growing continuously at a rate of 3.4% per year. a) Write a function that models the state’s population in millions x years after 200. b) Graph f in 0,10,1 by 4,7,1 c) Estimate the state’s population in 2007.
*April 19, 2012*

**math**

Biologist have have found that the weight W of a bird and the length L of it’s wing span are related by L=kW1/3, where k is a constant. The following list L and W for one species of bird. What is the value of k? W kilograms0.1 0.4 0.8 1.1 L meters 0.399 0.634 0.798 0.888
*April 19, 2012*

**math**

The total hang time T in seconds, is given by T(h)=^h/2. Where h is the maximum height. If a person jumps 6 ft off the ground, determine for how many seconds the person is in the air.
*April 19, 2012*

**math**

find function values f(x)=9x^2+10x-8
*April 19, 2012*

**word problem**

A farmer decides to enclose a rectangular garden, using the side of a barn as one side of the rectangle. What is the maximum area that the farmer can enclose with 80 feet of fence? What should the dimensions of the garden be to give the area?
*April 18, 2012*

**Algebra**

For what values of x is x/[x(3x-4)] undefined?
*April 16, 2012*

**Physics**

Light falls on a double slit with slit separation of 2.19 × 10 −6 m, and the ﬁrst bright fringe is seen at an angle of 12.7 ◦ relative to the central maximum. What is the wavelength of the light? Answer in units of nm Can the person post the steps and ...
*April 10, 2012*

**Physics**

It says incorrect. Can you explain the process?
*April 10, 2012*

**Physics**

Light falls on a double slit with slit separation of 2.19 × 10 −6 m, and the ﬁrst bright fringe is seen at an angle of 12.7 ◦ relative to the central maximum. What is the wavelength of the light? Answer in units of nm
*April 10, 2012*

**Physics**

Im sorry to ask again but what equation did you use? Can you list the steps you did please? So I can answer the next few questions by myself.
*April 10, 2012*

**Physics**

A pair of narrow parallel slits separated by a distance of 0.253 mm are illuminated by the green component from a mercury vapor lamp (λ = 545.1 nm). What is the angle from the central maximum to the ﬁrst bright fringe on either side of the central maximum? Answer ...
*April 10, 2012*

**Physics**

And where did you get those numbers?
*April 10, 2012*

**Physics**

Excuse me what was the equation you used? Because the answer is wrong.
*April 10, 2012*

**Physics**

A double-slit interference experiment is performed with light from a laser. The separation between the slits is 0.58 mm, and the ﬁrst-order maximum of the interference pattern is at an angle of 0.060 ◦ from the center of the pattern. What is the wavelength of the ...
*April 10, 2012*

**calc**

Let f(x)=x^3-3x^2 find the absolute maximum value of f(x) on the interval [1,4]? 22 hours ago - 3 days left to answer
*April 5, 2012*

**calc**

A____________B 9 miles is between A and B? at 3pm Andy began travelling South at a rate of 4mi/hr from point A at the same time Bill began travelling West at a rate of 5mi/hr from point B to A both stop wlking when Bill reaches point A What time will the distance between Bill ...
*April 5, 2012*

**11th grade algebra 2**

(1-7) write each function in vertex form (8-10) write each funtion in standard form? 1) Y=x^2+3x-10 2) Y=x^2-9x 3) Y=X^2+x 4) Y=x^2+5x+4 5) Y=4x^2+8x-3 6) Y=(3/4)x^2+9x 7) Y=-2x^2+2x+1 8) Y=(x-3)^2+1 9) Y=2(x-1)^2-3 10)Y=-3(x+4)^2+1
*April 5, 2012*

**Algebra 2**

(1-7) write each function in vertex form (8-10) write each funtion in standard form? 1) Y=x^2+3x-10 2) Y=x^2-9x 3) Y=X^2+x 4) Y=x^2+5x+4 5) Y=4x^2+8x-3 6) Y=(3/4)x^2+9x 7) Y=-2x^2+2x+1 8) Y=(x-3)^2+1 9) Y=2(x-1)^2-3 10)Y=-3(x+4)^2+1
*April 5, 2012*

**Physics**

Sherlock Holmes examines a clue by holding his magnifying glass (with a focal length of 29.8 cm) 10.4 cm away from an object. Find the image distance. Answer in units of cm Find the magniﬁcation.
*April 1, 2012*

**physics**

disregard
*April 1, 2012*

**physics**

A ray of light of vacuum wavelength 550 nm traveling in air enters a slab of transparent material. The incoming ray makes an angle of 37.4◦ with the normal, and the refracted ray makes an angle of 22.0◦ with the normal. Find the index of refraction of the ...
*April 1, 2012*

**Physics**

An object 3.35 cm tall is placed 10.8 cm in front of a mirror, which creates an upright image that is 5.61 cm in height. a) What is the magniﬁcation of the image?
*April 1, 2012*

**Physics**

disregard
*April 1, 2012*

**Physics**

The image of a crayon appears to be 20.6 cm behind the surface of a convex mirror and is 1.64 cm tall. The mirror’s focal length is 54.3 cm. a) How far in front of the mirror is the crayon positioned? Answer in units of cm I keep on getting it wrong so the answer & ...
*April 1, 2012*

**physics**

I keep getting error
*April 1, 2012*

**physics**

do I put my calculator in degrees?
*April 1, 2012*

**physics**

A ray of light traveling in air strikes the surface of a liquid. If the angle of incidence is 33.5◦ and the angle of refraction is 19.8◦, ﬁnd the critical angle for light traveling from the liquid back into the air. Answer in units of◦
*April 1, 2012*

**Physics**

do I have to convert GHz?
*April 1, 2012*

**Physics**

What is the wavelength of a radar signal that has a frequency of 30 GHz? The speed of light is 3 × 10^8 m/s. Answer in units of m Giving me the formula is just fine
*April 1, 2012*

**Physics**

Consider a concave mirror with a focal length of 14.04 cm. b) Find the image distance when the object distance is 7.02 cm c) Find the magniﬁcation of the image for part b Giving me the formulas is just fine
*April 1, 2012*

**Global History**

Sorry this is not very detailed...I checked my textbook but couldn't find any information. How did the Islamic Conquest impact India? Thanks so much in advance :)
*March 31, 2012*

**Physics**

A spherical glass ornament is 7.00 cm in diameter. An object is placed 11.8 cm away from the ornament. a) Where will its image form? b) What is the magniﬁcation of the image
*March 29, 2012*

**Physics**

A concave makeup mirror is designed so that a person 25.3 cm in front of it sees an upright image at a distance of 54.0 cm behind the mirror. a) What is the radius of curvature of the mirror? Answer in units of cm
*March 29, 2012*

**physics**

How did you get 20.6?
*March 28, 2012*

**Physics**

The image of a crayon appears to be 20.6 cm behind the surface of a convex mirror and is 3.32 cm tall. The mirror’s focal length is 52.6 cm. a) How far in front of the mirror is the crayon positioned? b) Calculate the magniﬁcation of the image
*March 27, 2012*

**Physics**

Consider a concave mirror with a focal length of 14.98 cm. a) Find the image distance when the object distance is 14.98 cm. (Answer with −1000 if the image does not exist.) That's the whole question..
*March 27, 2012*

**Physics**

Why is it infinity?
*March 27, 2012*

**Physics**

Consider a concave mirror with a focal length of 14.98 cm. a) Find the image distance when the object distance is 14.98 cm
*March 27, 2012*

**Physics**

Gamma-ray bursters are objects in the universe that emit pulses of gamma rays with high energies. The frequency of the most energetic bursts has been measured at around 3.0 × 10 21 Hz. The speed of light is 3 × 10 8 m/s. What is the wavelength of these gamma rays?
*March 27, 2012*

**Physics**

What is the frequency of an electromagnetic wave if it has a wavelength of 1.4 km? The speed of light is 3 × 10 8 m
*March 27, 2012*

**English**

what kind of sentence is this? Arabic numbers were being used for the first time the concept "0" was baffling to many they wondered how a zero could for standing.
*March 27, 2012*

**math**

google it
*March 20, 2012*

**AP History**

What was the Talented Tenth? Who proposed it & why?
*March 20, 2012*

**AP History**

What was the impact of Eli Whitney's interchangeable parts concept and what impact did Eli Whitney's cotton gin have? Why was the cotton gin so important?
*March 20, 2012*

**math**

20 divided by 4
*March 20, 2012*

**math**

one fourth of the childern in room 20 have dogs how many kids have dogs
*March 20, 2012*

**Chemistry**

Dinitrogen tetroxide decomposes according to N2O4 (g) = 2NO2 (g) In a certain experiment, N2O4(g) at an initial pressure of 0.554 bar is introduced into an empty reaction container; after equilibrium is established, the total pressure is 0.770 bar. A quantity of NO2(g) is ...
*March 19, 2012*

**6 grade math**

120lb _ _ $15 = $1
*March 19, 2012*

**geometry**

she probably meant bases
*March 18, 2012*

**Political Science**

True.
*March 14, 2012*

**chemistry**

what type of reaction is Al+S8=Al2S3
*March 14, 2012*

**geometry**

Well, across line L, it would be just the opposite. It would basically be a backwards D. Then across line M it would be a regular looking D again.
*March 13, 2012*

**rosemont**

a pizza was sliced 10 pieces. bill ate 2/10 of the pizza how much of the pizza was left?
*March 10, 2012*

**math**

The answer is D 5ft by 6ft.
*March 6, 2012*

**13**

c. is wrong!
*March 4, 2012*

**Statistics **

Suppose that the birth weight of newborn babies in the U.S is normally distributed with a mean of 7 pounds and a standard deviation of 1.6 pounds. Let the random variable X be the birth weight of a randomly selected record of live birth. a) What is the distribution of X? b) ...
*March 2, 2012*

**Statistics **

Suppose it is observed that, on average, 35 people are admitted to the intensive care unit of a particular hospital every week. Let the random variable X represent the number of people admitted to this intensive care unit on any particular day. a) What is the distribution of X...
*March 2, 2012*

**Statistics**

Suppose a basketball player, Player A, made 80% of her free throw attempts last season and that she continues to shoot free throws at the same rate. Assume that free throw attempts are independent. Let the random variable X be the number of free throws that player A makes in ...
*March 2, 2012*

**Statistics**

a) What is the distribution of X? b) Find the mean and standard deviation of X. c) Find the probability that player A makes exactly 10 free throws. d) Find the probability that player A makes at least 8 free throws.
*March 2, 2012*

**Statistics **

Suppose a basketball player, Player A, made 80% of her free throw attempts last season and that she continues to shoot free throws at the same rate. Assume that free throw attempts are independent. Let the random variable X be the number of free throws that player A makes in ...
*March 2, 2012*

**physics please help :/**

A 0.50-kg block, starting at rest, slides down a 30.0° incline with kinetic friction coefficient 0.30 (the figure below). After sliding 84 cm down the incline, it slides across a frictionless horizontal surface and encounters a spring (k = 33 N/m). (a) What is the maximum ...
*March 1, 2012*

**physics**

A 0.50-kg block, starting at rest, slides down a 30.0° incline with kinetic friction coefficient 0.30 (the figure below). After sliding 84 cm down the incline, it slides across a frictionless horizontal surface and encounters a spring (k = 33 N/m). (a) What is the maximum ...
*February 29, 2012*

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