Wednesday

April 16, 2014

April 16, 2014

Total # Posts: 217

**Chemistry**

A column of mercury in a barometer is 767.3 mm Hg high. Note, that in order for the pressures to be equal, density and height of a column are inversely proportional, therefore, (den1)(h1)=(den2)(h2). The density of mercury is 13.6 g/mL and the density of water is 1.00g/mL. a) ...

**Physics**

A 2050 kg truck is traveling east through an intersection at 2.3 m/s when it is hit simultaneously from the side and the rear. (Some people have all the luck!) One car is a 1200 kg compact traveling north at 4.5 m/s. The other is a 1600 kg midsize traveling east at 10 m/s. The...

**bobpursley**

yes it is

**physics**

Three blocks on a frictionless surface are connected by massless strings, with M1 = 1.40 kg, M2 = 2.40 kg, and M3 = 3.60 kg. Due to the force F acting on M3, as shown, the system accelerates to the right. Given that T1 is 3.50 N, calculate T2

**Math**

A rectangular enclosure is to be constructed with 800 feet of fence in order to have four sections. What should be the dimensions in order to maximize the area enclosed? What is the maximum area?

**math**

For all x greater than 2, let *x be defined as the sum of the positive integers less than x. What is the value of *16 - *13?

**math**

7√x +16=79, What is the value of x? a. 3 b. 6 c. 9 d. 27 e. 81

**Statistics**

A carload of stone taken from a quarry by the plug-and-feather method contains pieces of stone have a mean weight of 1,500 pounds and a total weight of 36,000 pounds. Another carload of stone produced by the explosive method (where stone is blasted into random shapes by explos...

**math**

Simply each expression. Use only positive exponents. (2t)^6 r^5/g^-3

**algebra**

Given a set of data pairs, how would you decide whether to use interpolation or extrapolation to find a certain value?

**math**

Describe how the slope of a line relates to a trend line.

**statistics**

if a test has a mean of 150 and a standard deviation of 30, we know that: a)50% of the respondents scored between 180 and 210 b)68% of the responents scored above 120 c)50% of the respondents scored between 120 and 210 d) 96% of the respondents scored between 90 and 210

**Math**

Not inequality I meant equation.

**Math**

How do I solve this absolute value inequality? Should I add two to both sides first? | -3n | - 2 = 4

**Math**

What is 6x minus 6x? 0x or just 0?

**math**

solve each equation /y/=17 /s/=0 -x=-4 -y=6 help!!!!

**math**

find each absolute value /14/... p.s the lines are suppose to be straight.

**Math**

For the second one I have this but I'm not sure what to do next Add 4x to both sides, so you would have 2y+6a=4x Then I divided 2y by 2 and 4x by 2 and got y+6a=4x Next I subtracted 6a from both sides and got y=2x-6a Am I right so far? If so what do I do next?

**Math**

slope and y intercept form of these two problems? Y-5=1/3(x-9) 2y+6a-4x=0

**Math.. please helpp!**

A female moth lays nearly 150 eggs. In on year there may live up to five generations. Each larva eats about 20mg of wool. Assume that 2/3 of the eggs die and that 50% of the remaining moths are females. Estimate the amount of wool that may be destroyed b the descendants of one...

**Math**

A female moth lays nearly 150 eggs. In on year there may live up to five generations. Each larva eats about 20mg of wool. Assume that 2/3 of the eggs die and that 50% of the remaining moths are females. Estimate the amount of wool that may be destroyed b the descendants of one...

**Math**

What is the independent and dependent variable in the situation. And what is the rate of change for the situation? Hannah delivered 12 newspapers after 20 minutes and 36 papers after 60 minutes

**math**

a chef can bake 15 cakes in one hour. what is the rate in pies per mintue

**Geometry**

The surface area of the sides of a right cylinder can be found by multiplying twice the number pie by the radius times the height. If a circular cylinder has radius (r) and height (h), write an expression that represents the surface area of its size.

**Math**

A used bookstore sells paperback fiction books in excellent condition for 2.50$ and In fair conditions for 0.50$. Write an expression for the cost of buying (e) excellent condition paperback and (f) fair condition paperback.

**English**

I feel stupid for not knowing these but I can't figure it out! So in the sentence we have "underline the verb be (and its various forms) and decide how it's used. Circle the verb its helping or linking to and Write linking verb or helping verb on the line" s...

**math**

the world record for the 100 meter butterfly swim set in 1999 was 51.81 sec. What was the average rate per second?

**math**

tell whether the given rates are equilivent... 32 ft/sec; 192 ft/min. ________________________________ 8.4 gal/day; 2 qt/hr..

**math**

complete each equation.. 1.5mi/min=________ mi/hr $1.92 per lb=________ per oz $18,500 salary per year=______ per week 42 hr/week=________ hr/day

**math**

so ms. Sue the answer is what u put on top?

**math**

442 mi in 8.5 hr.... now name the units in each rate then write a unit rate.

**Math**

You decide to build a pyramid out of wooden blocks. Each block must rest on the corners off 4 other blocks. If there is one block on top and 36 on the bottom, what is the total number of blocks you will need to complete the pyramid?

**English **

So for the summer I had to read cat's eye by Margaret Atwood and this happened to be a hard book to understand for me. I need help writing an essay in which I have to write an analytical essay detailing 3 events in the story where the author notably develops specific chara...

**English**

I would like some ideas or suggestions on how to approach this essay. Thanks.

**English**

After reading cat's eye by margaret Atwood, I had to write a essay. the essay required me to write an analytical essay detailing 3 events in the story where Atwood notably develops specific character traits in elaine Risley so that the reader can Identify with very human a...

**Math**

Find two numbers that have 2,3 and 5 as factors. What other factors do the two have in common?

**Math**

Find two numbers that have 2,3 and 5 as factors. What other factors do the two have in common?

**Geomerty**

Write the equation of the line with the slope 3/7 passing through the point (9,-2)

**math**

susan, joanne, and diane are triplets. susan has red, blue, green, and yellow sweaters. janne has green, red, purple, and white sweaters. diane's sweaters are red, blue, purple, and mauve. each girl has only one sweater of each color, and will pic a sweater t wear at rando...

**english**

What grammatical structure is the italicized portion of the sentence? We walked along the mountain path looking for unusual flowers.

**Physics **

For long range communication an elephant uses a low frequency rumble that is undetectable to human ears. One elephant can pick up another elephant's call from a distance of 10 km. The frequency of this rumble is about 13 Hz. How fast does the rumble travel? my teacher said...

**Physics **

For long range communication an elephant uses a low frequency rumble that is undetectable to human ears. One elephant can pick up another elephant's call from a distance of 10 km. The frequency of this rumble is about 13 Hz. How fast does the rumble travel?

**History**

no the open door policy granted equal trade opportunities to all countries

**World History**

yup a

**math**

use pascals triangle 1 5 10 10 5 1 for example Expand (2 + 3x)5. Applying the general rule of ascending and descending indexes and the coefficients from Pascal we can immediately expand the above equation (if we set a to 2 and b to 3): 25 + 5(24)(3x) + 10(23)(3x)2 + 10(22)(3x)...

**Science**

1. An electric space heater draws 15.0 A from a 120 V source. It is operated, on average, for 5.0h (hours) each day. a) How much power does the heater use and b) At $.10 per kWh, what does it cost to operate the heater for 30 days? 2. Suppose each person in the United States u...

**Math**

Can you please explain to me how to change them into decimals? The fractions i used are just made up so you can use any fraction you would like to show me. Thank you.

**Math**

I am trying to remember how to figure out which fraction is the greatest/least. Do i have to find the common denominator? An example would be 1/4, 3/8, 6/10, 1/7 ... kind of like this, only many more ... Thank you.

**physics**

A vertical tube with a tap at the base is filled with water, and a tuning fork vibrates over its mouth. As the water level is lowered in the tube, resonance is heard when the water level has dropped 18 cm, and again after 54 cm of distance exists from the water to the top of t...

**statistics**

customer arrive at alocal ice cream stand at an average rate of 16 perhour. what is the probability that 2 customer will arrive during the next 15 minutes?

**math**

4,149 miles

**Math**

Robin cross- stitches bookmarks and wall hangings . A bookmark takes her 1 1/2 days, and a wall hanging takes her 4 days. Robin recently spent 18 days cross- stitching 7 items. Solve the system of equations to find the number of bookmarks b and the number of wall hangings w th...

**Math**

3k/5+44=12k/25+8 Please help me solve this and show your work thanks

**english**

14. cat \kat\ n. 1. a carnivorous mammal (Felis catus) long domesticated as a pet and for catching rats and mice; 2. any of a family of carnivorous mammals (as the domestic cat, lion, tiger, leopard, jaguar, cougar, wildcat, lynx, and cheetah) What do the italicized words Feli...

**math**

a ladder 39 ft long leans against a building and reaches the ledge of a window if the foot of the ladder is 15 ft from the foot of the building how high is the window ledge above the ground tot the nearest foot.

**math**

approximate to the nearest inch the lenght of a rectangle whose diagnol measures 25.0 inches and whose width is 18.0

**math**

a 3ft tall boy casts a 4ft shawdow at the same time a tree casts a 72 foot shawdow using the pythagorean therem find the distance from the top of the tree to the tip of the shawdow

**alegebra**

if i bought 4 pairs of shoes for $325.50 and later bought another pair of shoes for $35, what was the mean cost of all the pairs of shoes?? thanks!(:

**alegebra**

if a rectangular pen for dogs has an area of 480 square meters, and the length of the pen is 2.4 meters, what is the width of the pen??

**geometry**

in quadrilateral ABCD AC is a diagonol, m<ACD=2x+4 and m<ACB=5x-11 what proves ABCD a rhombus

**chemistry**

for the list of chemicals below, write complete, balanced equations for all possible reactions that would lead to an insoluable salt. KCl, BaCl2, AgNO3, Pb(NO3)2, K2SO4, HNO3

**chemistry**

1. How many grams of P4 will react with 35.0 grams of H2O according to the balanced equation P4+5O2+6H2O=4H3PO4? 2. If you have 50 grams of P4, 40 grams of H2O, and an unlimited supply of O2, which reactant (according to the above balanced equation) is the limiting reactant? H...

**chemistry**

Refer to 3CuCl2 (aq)+2Na3PO4 (aq) = Cu3(PO4)2+6NaCl (aq) If a student started with 18 grams of CuCl2 and enough Na3PO4 to completely react, how many grams of Cu3(PO4)2 will (theoretically) be produced?

**Organzie **

Sorry about the name my sister wrote that. She ask me to ask you for the ideas.

**Organzie **

How do you organzie binders? Also I'm making a homework binder. I need some ideas. Please Thank You !!! :)

**Calculus. Please help!**

Would I then plug in x and y into the original equation to find the minimum value? When I do that I get approximately 19.472, but my webwork homework says that is incorrect.

**Calculus. Please help!**

Find the minimum value of the function f(x,y= 25x^2+3y^2+20xy+10x+4y+10 subject to the constraint 5x^2+4xy=1. I solved fx=50x+20y+10 fy=6y+20x+4 gx=10x+4y gy=4x Then what?

**Calculus**

Solve the separable differential equation: dy/dt=4y^6 and find the particular solution satisfying the initial condition y(0)=-3 y(t)=?

**Calculus**

A cost function is given by: A'(x)= 2x^2/x^2-211/x^2. For what values is A(x) increasing and decreasing? Any help would be appreciated

**Calculus**

A manufacturer can produce digital recorders at a cost of 60 dollars each. It is estimated that if the recorders are sold for P dollars a piece, consumers will buy q= 150-p recorders each month. What is the average rate of profit obtained as the level of production increases ...

**Calculus**

Find the derivative of: y= 5^x + 15/x^6 I'm assuming I need to take the natural log of each side, but I get stuck after that part.

**Another Calculus**

Sorry I have been trying to figure this out all day. Find the largest and smallest values of the given function over the prescribed closed, bounded interval. g(t)= (t^3/2)(e^-2t) for 0<t<1.

**Calculus**

Using logarithmic differentiation find the derivative of f(x)=2x/x. I can't seem to figure this out.

**Calculus**

How did you get (3x-4) from (3x-1) when you took the first derivative?

**Calculus**

Find the largest and smallest values of the given function over the prescribed closed, bounded interval of: f(x)=(3x-1)e^-x for 0<x<2

**calculus**

Find the second derivative of: h(t)= (t^2 + 5)^8

**calculus**

Please disregard. I solved the problem. Thank you anyways.

**calculus**

A stone is dropped from a height of 144 feet. a. When will the stone hit the ground? b. With what velocity does it hit the ground?

**calculus**

I believe we have to express it as a function using f(x) and g(x)....not sure.

**calculus**

At age 15, Nan is twice as tall as her 5-year-old brother Dan, but on Dan's 21st birthday, they find that he is 6 inches taller. Explain why there must have been a time when they were exactly the same height

**math**

a map is drawn to the scale of 3/4 inch = 50 miles. WHat is the actual distance between two towns that are 1 1/2 inches apart on the map?

**chemistry**

Under certain conditions, neon (Ne) gas diffuses at a rate of 4.5 centimeters per second. Under the same conditions, an unknown gas diffuses at a rate of 10.1 centimeters per second. What is the approximate molar mass of the unknown gas?

**math**

how do you calculate the maximum volume of a cylinder?

**math**

What is the area of the trapezoid given top is 14, one side is 7, and bottom corner is 65°?

**math probability**

there are 3 nickles 2 dimes and 5 quarters in a purse. the three coins are selected in succession at random. find the probability of selecting2 nickles , then a quarter.

**precalc**

How do I calculate the number of images in a particular iteration for a transformation?

**CRIMINOLOGY**

thank you

**CRIMINOLOGY**

when it comes to a crime such as extortion, could it be said that greed, fame and/or revenge might be a motivating factor?

**algebra**

I have to find the square footage of my kitchen floor with the length of one side being 8 inches. So, now I know I can make X=8. f(x)=x^2 is the template needed for this solution. If f(8)= the square footage of my kitchen floor, what will my answer be? f(8)=8^2 f(8)=64 8 was m...

**Chemistry**

Calculate the mass of silver metal (Ag) produced from the reaction of 5.58 grams of copper metal (Cu) according to the following reaction: Cu(s) + 2AgNO3(aq) --> Cu(NO3)2(aq) + 2Ag(s)

**algebra**

is -4 a solution of the inequality? x≥ 4

**CRIMINOLOGY**

What are some examples of non-monetary restitution?

**algebra**

You are planning to spend no less than $6,000 and no more than $10,000 on your landscaping project. Write an inequality that demonstrates how much money you will are willing to spend on the project.

**algebra please help**

If you enter Interstate 40 at mile marker 23 in Sayre, Oklahoma, how far would you need to travel to reach mile marker 125 in El Reno, Oklahoma? After reaching El Reno, you might worry that your vehicle is running low on fuel. You know that your vehicle can travel 32 miles per...

**algebra**

. If you enter Interstate 40 at mile marker 23 in Sayre, Oklahoma, how far would you need to travel to reach mile marker 125 in El Reno, Oklahoma? After reaching El Reno, you might worry that your vehicle is running low on fuel. You know that your vehicle can travel 32 miles p...

**math**

y=-2x+64

**algebra**

9x2e+4xe+1 ---- xe

**Math**

i dont know

**Math**

i dont know

**Biology**

If bird DNA is more similar to crocodile DNA than turtle DNA is to crocodile DNA, then... A)birds should be included amoung reptiles B)turtles and birds should be excluded from the reptiles C)the reptiles should be replaced by several new classes D)each of the above represents...