Saturday

April 19, 2014

April 19, 2014

Total # Posts: 472

**Geometry**

a hemispherical bowl with radius 25cm contains water whose depth is 10cm. what is the water's surface area

**Geometry**

thank very much Steve

**Geometry**

I need help in this question!!! CD has an endpoint at (2,-1) and a midpoint at (8,3). which measure is closest to the length of CD? A. 20.4 units B. 8.4 units C. 14.4 units D. 11.7 units

**Geometry**

thanks Steve

**Geometry**

do I use the distance formula

**Geometry**

CD has an endpoint at (2,-1)and a midpoint at (8,3). which measure is closest to the length of CD?

**introductory to physics**

A pendulum bob is released from some initial height such that the speed of the bob at the bottom of the swing is 4.0 m/s. The acceleration of gravity is 9.81 m/s 2 . What is the initial height of the bob? Answer in units of m

**Accounting**

Suppose you want to have $5,000 saved at the end of five years. The bank will pay 2% interest on your money. How much would you have to deposit today to have the $5,000 you want at the end of five years?

**Math**

Mariko has an 80 inches = 1 inch scale- drawing of the floor of her house. On the floor plan, the dimension of her rectangular living room are 1 7/8 inches by 2 1/2 inches. What is the area of her real living room in square feet?

**Math**

A scale drawing of a rectangular field is 10 cm by 8.5 cm. if the actual field has dimensions of 40 meters by 34 meters, which could be the scale used for the drawing?

**Chemistry**

calculate the minimum concentration of ag+ ion that must be added to (or built up in) a 0.140 m Na2CrO4 solution in order to initiate a precipitation of silver chromate. The ksp of ag2cro4 is 1.2 × 10^-12.

**Physics**

1/q + 1/p = 1/f f=r/2 p=15.1 f= 8.55/2= 4.275 1/q= 1/f+1/p= 1/4.275 + 1/15.1 = 19.375/64.5525 take inverse to get q q= 3.33

**Physics**

An object 6.70 cm high is placed 15.1 cm in front of a convex mirror with radius of curvature of 8.55 cm. Where is the image formed?

**math**

3/4(-2x+3)+7x/2=11/4

**Math**

An elevator moves at a rate of -5.8 feet per second from a height of 300 feet above the ground. It takes 3 seconds for the elevator to make its first stop. How many feet above the ground is the elevator now?

**Math**

A builder wants to construct a cube-shaped diving pool with a water volume of 1800 cubic feet. . Approximate the edge length of the pool to the nearest foot

**speeches**

in conducting a personal interview,setting limits on what will be covered should occur?

**algebra**

B=1/3h(q+z) solve for q

**math**

its $51.58

**photo**

I have to write my Artist Statement on obsessions I am am kind of lost on what to write about.

**CHEMISTRY**

The two half-reactions for the LeClanche dry cell battery are shown below. Describe the direction of spontaneous electron flow in this electrochemical cell. Zn(s) ---> Zn2+(aq) + 2e- 2NH4+(aq) + 2e- ---> 2NH3(g) + H2(g)

**math**

Thank yu so much!

**math**

Please simplify and explain to me how to do each of these. Greatly appreciated. x = multiply sign (not a variable) a)((9)^(1/2) (4)^2) / 24 b) (16)(2)^(x+2) The x here is a variable, not multiplication sign) c) (3)^(-8)/ (3)^(-6) (3)^(-5) d) ((4)^(-2) + (2)^(-4))^(-1) Thank yo...

**math**

ur amazing !

**math**

With reference to the right triangle,, explain why the expressions y = sin x and y = cos ((pi/2) - (x)) give the same results for all the values of x. Discuss whether or not this same relationship exists for angles greater than (pi/2).

**math**

With reference to the right triangle,, explain why the expressions y = sin x and y = cos ((pi/2) - (x)) give the same results for all the values of x. Discuss whether or not this same relationship exists for angles greater than (pi/2).

**political science**

what is ''reasonable search''?

**math**

identify all real roots of x^3-9x^2+16x-8=0

**Chemistry**

Using the balanced equation of: HCl+NaOH-->H20+NaCl, how many moles of HCl could be neutralized with 13.2 mL of 3.00 M NaOH?

**algebra**

explain how you solve 11x=3y=12 using 3x=9 as subsitution

**physics**

In a specific region of interstellar space the atomic composition of gaseous matter is 89.1% atomic hydrogen and 10.9% helium, the temperature is 27K and the pressure is 2.58x10^-15Pa. What is the density of matter in this region? What is the particle density?

**math**

If the digits of a number may be any one of 0 through 9 (except the first digit cannot be zero), and the system of alternating signs of coefficients is used to create a polynomial, what is the least number m of real zeros the polynomial can have? What is the greatest number M ...

**math**

If the digits of a number may be any one of 0 through 9 (except the first digit cannot be zero), and the system of alternating signs of coefficients is used to create a polynomial, what is the least number m of real zeros the polynomial can have? What is the greatest number M ...

**math **

How do you evaluate i to large powers such as i^1992, i^1993, and i^2000 without a calculator?

**math**

What is the general pattern when you divide each polynomial (x^3-Y^3, x^5-y^5, x^7-y^7, x^9-y^9) by x-y?

**math **

write y= -.5(x+6)(x+3)(x-3) in standard form.

**math**

Thks Ms. Sue the answer for the second part is 6 inches.

**math**

A map indicates that two cities are 160 miles apart. The scale of the map is 1/2 inch= 20 miles. 1. how many inches apart are the cities on the map. 2. Another map show the two cities has a scale of 3/4 inch =20 miles. How many inches apart are the two cities in the map?

**math**

It cost $15.00 to buy 150 sheets of brand A's paper. it cost $19.25 to buy 175 sheets of brand B's paper. Which brand has the better value and by how much?

**math**

thks

**math**

what is the relative error of a distance given as 550cm plus or minus 24.2cm?

**Physics**

A spring has a constant of 2.4 x 10^2 n/m. What force does it take to stretchmit .8m? How much PE is stored in the spring? Make a graph of the constant from .1 to 1.0 meters.

**Physics**

Wen an oxygen nucleus at rest is struck by a neutron moving at a speed of 1.2 x 10^8 m/s in a head on elastic collision crazy things happen. If the oxygen nucoeus is 8 times the mass if the neutrin, what us the velocity of each particle after the collision?

**Physics**

If a pendulum bob has a mass of 25 kg and is set in motion from a point .2m from the lowest point swing, what is the KE at the lowest point in the pendulums motion?

**business statistics**

Assume that X is a binomial random variable with n = 5 and p = 0.35. Calculate the following probabilities?

**business**

what is Australia's finance sector competitive issues?

**Math**

Sarah is following a recipe that calls for 1 1/4 cups of flour. About how many cup of flour would she need to make 4/9 batch of the recipe?

**Calculus**

Find the equation of the tangent plane at the given point. 1)x^2+y^2-z=1 at the point (1,3,9) 2)x^2*y^2+z-40=0 at x=2, y=3 3) x^2+ln(xy)+z=6 at point (4,0.25,2) For the first one I got the partial fraction in terms of x, y and z and my final answer was -2x+6y-z+2. I don't ...

**elementary and intermediate algebra**

how to write the equation for the following problem: The Post office charges extra for packages that must be processed by hand. Find an equation for the nonmachinable cost n in terms of the machinable cost m. 1 pound is $ 2.74( machinable cost, nonmachinable cost is $ 4.95

**Physics**

D= ViT + 1/2aT^2 D= (60)4.3+4.9(4.3^2) D= 348.6 M

**College physics**

y=r sin theta y= 40*sin315 y=-28.3 units x=r cos theta x= 40*cos315 x=28.3 units

**college biology**

LDL is considered bad because it has a lower density, or weight per mass, and therefore tends to settle and accumulate along with excess cholesterol in the blood. HDL sweeps through to keep everything moving along and prevent clogging.

**math**

How do I do this calculation on a calculator... A=$4000(1+.035/12)raise 12*10

**health**

Lol me to... Thanks guys :)

**physics**

A bicycle has wheels of radius 0.3 m. Each wheel has a rotational inertia of 0.088 kg× m2 about its axle. The total mass of the bicycle including the wheels and the rider is 79 kg. When coasting at constant speed, what fraction of the total kinetic energy of the bicycle ...

**physics**

An oil drop is stationary within an electric field of 490 V/m that is set up between two parallel plates. If the volume of the oil drop is 4 X 10 (-19) m3, how many excess electrons does it carry? (I'll give ya'll just one hint: the fundamental unit of charge e = 1.6 X...

**Math**

Suppose that you want to purchase a home for $450,000 with a 30 year mortgage at 6% interest. Suppose that you can put 20% down. Assume that the monthly cost to finance $1,000 is $6.00. What are the monthly payments

**Chemistry**

A 125-g piece of metal is heated to 288 degrees celsius and dropped into 85.0 g of water at 26 degrees celsius. If the final temperature of water and metal is 58 degrees celsius, what is the specific heat of the metal?

**chemistry**

A gas sample in a sealed vial originally at 0.6 atm and 300 K, was heated at 450 K. What other property of the gas has changed? What is the value of this property after heating?

**Business English**

Our short memory can only hold about seven bits of information at a time. This means you should: a,use words with six letters or less b,use sentences of six letters or less c,never write a document with more than seven points d,group large amounts of information into three to ...

**Chemistry**

You mix 1.00 L of 2.00 M BaCl2 with 1.00 L of 2.00 M AgNO3. What compounds remain in solution, and what are their concentrations?

**Trig**

How do you do this? 1-sin^2x/csc^2 x-1

**Art**

You really should do your own homework. 1. Alexander Calder invented this type of art. () fiber art (*) mobiles () stabiles () public art 2. Today, decisions in planning, selecting, and/or creating an artwork for public display are made in the following way. () They are the de...

**Math**

Solve the following problem. The owner of a toy store is taking inventory of bicycles and tricycles in an unusual way. He said he counted 50 wheels and 40 pedals.How many bicycles and how many tricycles did he have?

**Physics**

While sitting on a tree branch 12m above the ground, you drop a chestnut. When the chestnut has fallen 2.5m, you throw a second chestnut straight down. What initial speed must you give the second chestnut if they are both to reach the ground at the same time?

**Geometry**

help?

**algebra**

h(t) = -16t2 + 50t + 6, where t is the time in seconds since the ball was thrown. It takes the ball approximately _____ seconds to reach its maximum height. (Round to the nearest tenth of a second and enter only the number.)

**chemistry**

A piper delivers 10.04, 10.02, 10.08, and mL in consecutive trails. Find the mean volume and the average deviation from the mean.

**chemistry**

A piper delivers 9.97 g of water at 20c. what volume does piper deliver?

**math**

i got 5

**math**

I don't know how to make 14/9 into a mixed number please help? Thanks

**math**

5/2 has to be made into a mixed number but I'm having problems because i forgot how to do it please help me?

**Math**

If Jillian must average at last 90 on two quiz scores before she can move on the next skill level. Jillian got a 92 on her first quiz. What scores could jillian get on her second quiz in order to move to the next skill level

**Math**

If Jillian must average at last 90 on two quiz scores before she can move on the next skill level. Jillian got a 92 on her first quiz. What scores could jillian get on her second quiz in order to move to the next skill level

**Math**

Circle it has a larger area by 3 more

**7th grade social studies**

Just a say what was the population in 1650 and compare it to the population in 1700

**math**

How many groups of 5 can i make with 2? Subject:Math

**math**

What's your question?

**math**

There are three types of bones in the inner part of your ear which are called malleus,incus, and stapes.

**math**

How may groups of 14 can you make with 9?

**math**

How many groups of 14 can you make with 9?

**6th grade math**

How many groups of 14 can you make with 9 its a question on my math homework and i need to make it into a mixed number???? please help me?

**4th grade Math Help**

No he can't because if he did which 23x3=69 but he only has 66 acorns so then he should give each student two acorns because see below. So then he would have 20 more acorns. 23x2=46

**math**

Find the 265th term of an arithmetic sequence whose second term is 5/8 and whose 9th term is 71/24 pls help asap

**math**

Rodney need 3/4 of a roll of wrapping paper to wrap 5 gifts. How much wrapping paper does it take to wrap two gifts?

**math**

Julian baked m cookies. Each baking pan holds 12 cookies. How many baking pans were needed to bake the cookies? Please help I need a complete answer!!!

**social studies**

the group of the same as subordinate group.A defining feature of this group is that its members have less control or power over their lives than do members of dominant groups.

**math**

what is the factor of 8 and 16

**math**

im in sixth grade and im confused with this question.there are 44,000 people living in salem.(16,000~workers :2,000~preschoolers : 13,000~students : 4,000~retirees : 8,000~homemakers : 1,000~unemployed) *what fraction of the population has jobs outside home?

**8th grade math**

ANSWER: ABOUT 42.2222....(MILES A HOUR) SO I GUESS ABOUT 42 MILES CAUSE 760 DIVIDED BY 18 IS 42.222... MEANING 42 MILES A HOUR DEPENDS IF YOU BELIEVE ME CAUSE IM 11 SO AIN'T THAT SURPRISING.PLUS YOU COULDA USED A CALCULATER

**AP chemistry**

A flask weighs 76.83 g when filled with Br and 55.63 g when filled with water (d- 1.00 g/cm3) How much does the flask weigh empty?

**physical science**

A magnet is plunged into and out of a coil of wire 2 times per second. This induces 5 volts. If the number of coils in the wire is doubled from 100 to 200, and the original rate 2 times per second is kept the same, what will be the new voltage induced.

**physics**

A ray of light is incident on a plane mirror at an angle of 40o with the mirror surface. What will be the angle of reflection?

**physics**

15 beats are heard in 5 seconds when a piano key and a tuning fork of slightly higher frequency (440 Hz) are struck at the same time. What is the frequency of the sound emitted by the piano key?

**algebra 2**

a research station in antartica is at approximately 75 degreess latitude. how many miles is the station from the equator, given that the radius of the earth is approximately 4000 miles? round your answer to the nearest mile.

**physics**

A spelunker (cave explorer) drops a stone from rest into a hole. The speed of sound is 343 m/s in air, and the sound of the stone striking the bottom is heard 3.87 s after the stone is dropped. How deep is the hole?

**music**

106 beats per minute

**science**

from the point of view of a environmentalist , which is probably the most significant argument against offshore drillin for oil ?

**Physics**

You are explaining to a cousin what it really means to het something up in reference to a handshake and what term means and why it never ends (micro wise)

**Active physics**

How much hear must be added to 1.5kg of water at -25degC to raise it up to 119degC?

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