Sunday

March 1, 2015

March 1, 2015

Total # Posts: 272

**Math Help**

Hi! Can someone help check this for me and see if I'm doing it right? Thanks!! :) Directions: Use the Half-Angle formulas to determine the exact value of sin(pi/12). Here's what I have: π/12 = ( 180° ) / 12 = 15°. = sin ( π/12 ) = sin 15° = sin ( ...
*February 3, 2015*

**Math**

Thanks doll
*December 29, 2014*

**Math**

The edge of a cube was found to have a length of 50 cm with a possible error in measurement of 0.1 cm. Based on the measurement, you determine that the volume is 125,000 cm3. Use tangent line approximation to estimate the percentage error in volume.
*December 29, 2014*

**math**

Ken uses 6 apples and 2 bananas to make a fruit salad. He puts twice as many oranges as bananas in the salad. How many pieces of fruit will Ken use to make 2 fruit salads?
*December 2, 2014*

**Physics- formula help**

Well the question never mentioned it if it was at a constant speed, the weight of the object is 1.42N and the acceleration is 4.9m/s^2 how would I calculate that?
*December 1, 2014*

**Physics- formula help**

How do you calculate air resistance on an object if you have how much the object weighs and the acceleration?
*December 1, 2014*

**Chemistry **

A sample of lithium sulfate, LiSO4, contains 6.78 x 10^23 formula units. a) How many moles of Li+ ions are there in the sample? b) How many moles of ions are there in the sample? My work: I think a) is 2.26 moles And b i am not sure
*November 24, 2014*

**Chemistry **

A sample of lithium sulfate, Li2SO4, contains 6.78 x 10^23 formula units a) How many moles of Li+ ions are there in the sample b) How many moles of ions are there in the sample
*November 24, 2014*

**Math HELP!**

2/3
*November 6, 2014*

**Calculus**

Match the rule with the title: ____ 3. d/dx [f(x)/g(x) ]=(g(x) f^' (x)-f(x) g^' (x))/[g(x)]^2 ____ 4. d/dx [f(g(x))]=f^' (g(x))∙g'(x) ____ 5. d/dx [f(x)∙g(x)]= f(x) g^' (x)+g(x) f^' (x) ____ 6.d/dx [x]=1 ____ 7. d/dx [f(x)+g(x)]= f^' (x...
*November 6, 2014*

**chemistry**

Calculate the Calorimeter Constant (Ccal) if 25.00 g of water at 50.21°C was added to 25.00 g of water at 25.00 °C, resulting in an equilibrium temperature of 35.00 °C?
*November 2, 2014*

**Science PLEASE HELP!**

So basically the reason why Lithium is more reactive than Neon is because, Reactivity increases for metals as you go down a group, and for nonmetals the reactivity increases as you go up on a group. BUT AS YOU SEE, on the periodic table it seems as if Neon would have a ...
*October 17, 2014*

**Biology**

There are many reasons how human activities can lead to an imbalance of biochemical cycling, anything that the natural environment is not familiar with can damage or throw off biochemical balance One of the negative impacts of eutrophication and increased algal growth is a ...
*October 17, 2014*

**science**

Your welcome, I hope I explained it well enough :)
*October 17, 2014*

**science**

Here's and example; Hot water vs. Cold water. When you mix sugar in hot water it dissolves faster and better then it would in a cold water because of the temperature. When the temperature of water is higher(hot) the water molecules move faster so they are able collide with...
*October 17, 2014*

**7th grade math**

No, the question is asking for the FEWEST account of magazines sold to make $200 for the school. -So we know that in order to make $200 for the school they must make an actually $400 profit because the company will take half of the money. But we must include the $18 fee. So in...
*October 17, 2014*

**Bio**

Peripheral protein
*October 16, 2014*

**Science**

1. yes because earth's revolution around the sun along with spinning on its axis gives us our seasons and depending where we are on earth, the sun may be more intense depending on where are in our revolution around the sun. this creates the different climates around the ...
*October 5, 2014*

**chemistry**

What is the percent mass of calcium in a calcium supplement if 1.06 g of calcium carbonate is extracted from a 2.82 g pill
*October 5, 2014*

**math**

If you know the order from least to greatest of 5 negative rational numbers, how can you use the information to order the absolute values of those numbers from least to greatest
*September 17, 2014*

**trigonomety**

FIND THE HEIGHT OF A TREE,IF 120 FT. FROM ITS BASE THE ANGLE OF ELEVATION OF ITS TOP IS 10 DEGREE 18 MINUTES
*June 30, 2014*

**grade 3 math**

1) what is the greates perimeter of a rectangle with an area of 39 square feet? 2) What is the least perimeter of a rectangle with an area of 32 square feet? 3) A rectangle has an area of 42 square inches. Which has a greater perimeter, the rectangle with the dimensions 21 x2 ...
*April 29, 2014*

**grade 3 math**

two rectangles have an area of 36 square inches. Name two possible perimeters for the rectangles.
*April 29, 2014*

**Math 3rd grade**

Lee wants to cut this piece of canvas into two rectangles that are 3 x 2 and 3 x 5. He wants the sum of the areas of the two small rectangles to be the same as the area of the large rectangle. Can he do this? explain.
*April 28, 2014*

**geometry**

ee wants to cut this piece of canvas into two rectangles that are 3 x 2 and 3 x 5. He wants the sum of the areas of the two small rectangles to be the same as the area of the large. Can he do this? explain.
*April 28, 2014*

**math**

Suppose Maya made another sign with an area of 48 square inches. would this sign be larger or smaller than the sign with an area of 48 square centimeters? Explain how you know.
*April 14, 2014*

**managerialaccounting**

Describe how total variable costs and unit variable costs behave with changes in the level of activity.
*March 4, 2014*

**physics**

A string under a tension of 42.6 N is used to whirl a rock in a horizontal circle of radius 2.47 m at a speed of 19.7 m/s. The string is pulled in and the speed of the rock increases. When the string is 1.13 m long and the speed of the rock is 46.9 m/s, the string breaks. What...
*February 22, 2014*

**physics**

A block M1 of mass 16.5 kg sits on top of a larger block M2 of mass 26.5 kg which sits on a flat surface. The kinetic friction coefficient between the upper and lower block is 0.425. The kinetic friction coefficient between the lower block and the flat surface is 0.125. A ...
*February 22, 2014*

**physics**

A 33.3- kg block (m1) is on a horizontal surface, connected to a 5.1- kg block (m2) by a massless string. The pulley is massless and frictionless. A force of 220.1 N acts on m1 at an angle of 32.p deg. The coefficient of kinetic friction between m1 and the surface is 0.201. ...
*February 20, 2014*

**physics**

A 33.3- kg block (m1) is on a horizontal surface, connected to a 5.1- $kg$ block (m2) by a massless string. The pulley is massless and frictionless. A force of 220.1 N acts on m1 at an angle of 32.p deg. The coefficient of kinetic friction between m1 and the surface is 0.201. ...
*February 20, 2014*

**Statistics **

Explaining confidence. A student reads that a 95% confidence interval for the mean ideal weight given by adult American women is 140 ± 1.4 pounds. Asked to explain the meaning of this interval, the student says, “95% of all adult American women would say that ...
*December 1, 2013*

**KINDERGARTEN**

HOMEWORK HAVE CHILDREN WRITE A ROW OF EACH LETTER AND THEN WRITE THE WORDS
*November 14, 2013*

**science**

how do the words matter element atom crystal compound and molacule relate
*September 19, 2013*

**Algebra**

I need help with solving these absolute value inequalities. I have to graph them as well. y< |x+2|+4 and y>|x+5|+3 I just don't know what to do without a coefficient in front of the absolute value!
*September 12, 2013*

**childcare**

write a letter to day care center supervisor requesting written permission to observe a child at the center
*August 26, 2013*

**Early childhood**

Teachers usually ask more of this type of question even if it is NOT recommended: A. convergent. B. divergent. C. open-ended. D. recall.
*August 25, 2013*

**chemistry**

1.64
*June 12, 2013*

**math**

question 1 use the laws of logarithms to simplify the expression Inx(x+2)(x+1) question 2 (18m^2n+6m^3n+12m^4n^2)/ (6m^2n)
*May 6, 2013*

**Chemistry**

A student determined the H of neutralization of nitric acid (HN03) mixed with NaOH solution, using the procedure described in this experiment. Fifty milliliters of 1.00M HN03 was added to 50.5 mL of 1.00M NaOH solution, and the following time-temperature data were recorded. A ...
*May 1, 2013*

**College Physics**

A uniform meter stick of mass M has an empty paint can of mass m hanging from one end. The meter stick and the can balance at a point 19.9 cm from the end of the stick where the can is attached. When the balanced stick-can system is suspended from a scale, the reading on the ...
*April 27, 2013*

**Calculus**

In a test run, a new train travels along a straight-line track. Data obtained from the speedometer indicate that the velocity of the train at any time t can be described by the velocity function v(t) = 8t (0 _< t _< 30) a. Find the position function of the train. b. Find...
*April 26, 2013*

**Calculus**

In a test run, a new train travels along a straight-line track. Data obtained from the speedometer indicate that the velocity of the train at any time t can be described by the velocity function v(t) = 8t (0 ¡Ü t ¡Ü 30) a. Find the position function of ...
*April 26, 2013*

**chemistry**

br ne s
*April 2, 2013*

**algebra1**

mr jones estimates his profit starting in 2006 will be given by the formula p=7t^2-14t+10 where t is number of years and p is the profit.if this formula is correct,when will mr.jones have a profit of more than $1000
*March 28, 2013*

**physics**

After 35 minutes of running, at the 8-{\rm km} point in a 9-{\rm km} race, you find yourself 200m behind the leader and moving at the same speed. What should your acceleration be if you are to catch up by the finish line? Assume that the leader maintains a constant speed ...
*March 20, 2013*

**english**

are there any figurative language in the book Witch hunt the mysteries of salem?
*March 2, 2013*

**math**

the first term of a linear sequence is 5,nd d common difference is -3 find the 15 term
*February 24, 2013*

**Math**

If 2 cups of rice requires 4.5 cups of water, what is the total number of cups of water needed to prepare 5 cups of the same rice?
*December 13, 2012*

**science**

a toy car is traveling .5 meters per second.It goes 3.5 seconds. how far did it travel.
*November 20, 2012*

**Math**

12/42=4w/14
*November 11, 2012*

**trigonometry**

Dwight Howard is playing center for the Los Angeles Lakers. During the game, he blocks a shot. When Howard blocks the ball, he is 12 feet off of the ground (including his height). The ball is hit down at an angle of depression of 63°. Find the distance that the ball ...
*October 18, 2012*

**physical sicence**

if a gives a force 2kg object an acceleration 1.6,/s2 what does the smae force give to an object of 4kg
*October 12, 2012*

**anatomy/physiology I**

In physiology, it's all about the function of cell and tissue and you need a good background in histology to reason properly. Skin is the best example. If you know what type of cell all the layers are made of it's easy to figure out some dermatology pathologies.
*October 8, 2012*

**anatomy/physiology I**

Not really, its more for histology. But between the two, its more important for the physiology component.
*October 8, 2012*

**math**

8+2y-3+9y
*October 3, 2012*

**physics**

a) 9.8 * .36 = max a b) 9.8 * .16 = relative a a) Reasoning. Friction prevents sliding and the only acceleration it has thus far is gravity. b) Reasoning. K friction is used when the vehicle is moving, which in b, it is
*September 29, 2012*

**geometry**

[1.04] If B is between A and C, AB=8x, BC=3x and AC=33, what is the value of AB?
*September 11, 2012*

**chemistry**

Zinc reacts with hydrochloric acid according to the reaction equation Zn(s)+2HCL(aq)=>ZnCl2(aq)+H2(g). How many mm of 1.50M HCL(aq) are required to react with 9.05 g of ZN?
*August 9, 2012*

**Theory and reserch in child development **

During the middle of the twentieth century, North America psychology was dominated by
*May 31, 2012*

**chemistry**

if 250ml of nitrogen dioxide were collected over mercury at 72 degrees celsious and under pressure 675mm of mercury, how many grams of nickel reacted?
*May 31, 2012*

**Algebra 2**

Write a recursive formula for the sequence 15, 26, 48, 92, 180, ... Then find the next term.
*May 17, 2012*

**Algebra 2**

Find the arithmetic mean a n-1=3.9, a n+1=7.1
*May 17, 2012*

**Algebra**

find the arithmetic mean A_n-1_-3.9, A_n+1_=7.1
*May 17, 2012*

**Physics**

A cylindrical tank has a tight-fitting piston that allows the volume of the tank to be changed. The tank originally contains 0.140 m3 of air at a pressure of 3.20 atm. The piston is slowly pulled out until the volume of the gas is increased to 0.440 m3. If the temperature ...
*April 17, 2012*

**physics**

yes. you conclude that original asteroid had a similar composition.
*February 29, 2012*

**physics**

Radiometric
*February 29, 2012*

**Accounting**

Give an example where product and period costs are the same and a separate example where they are different.
*February 19, 2012*

**statistics**

PROBLEM 4: PREFERENCE FOR CAN (a) What is the probability of preferring a glass bottle? b) What is the probability of preferring a glass bottle given that one lives in Region A? c) What is the probability of preferring a can given that one lives in Region C or B? Region A ...
*February 16, 2012*

**algebra**

Hong goes running Monday, Wednesday, and Friday of each week. Each Monday he runs miles, each Wednesday he runs miles, and each Friday he runs miles. How many total miles does he run in weeks?
*February 11, 2012*

**program planning and evaluation**

please answer the question above
*January 29, 2012*

**math **

What is the value of |-3-10|? -13, -7, 7 or 13
*January 24, 2012*

**chemistry**

What are the materials used to create a free standing atomic model of iodine?
*January 3, 2012*

**physics**

1. A ball moving horizontally clears a net 2 meters high. What maximum speed can it have if it is to fall within 5 meters of the net? 2.A pulley system lifts a load of 800 Newtons, 20 centimeters while the rope pulling it moves 100 cm. a. How much force must be applied to lift...
*October 18, 2011*

**physics**

A small steel ball rolls off a table (1 meter high) with a speed of 2 m/s. Where should they place a can (15 cm high; diameter 10 cm) to catch the ball?
*October 18, 2011*

**physics**

1. A jet is flying with an air speed of 500 m/s. A parcel is dropped out of the plane. Assume that it takes 40 seconds for the parcel to hit the ground.. Assume no air resistance. a. How high is the jet? b. How far forward horizontally from the spot where it leaves the jet, ...
*October 18, 2011*

**physics**

1. A jet is flying with an air speed of 500 m/s. A parcel is dropped out of the plane. Assume that it takes 40 seconds for the parcel to hit the ground.. Assume no air resistance. a. How high is the jet? b. How far forward horizontally from the spot where it leaves the jet, ...
*October 18, 2011*

**chem**

How many moles of chloroethylene contain 5.47X10^26 molecules
*October 1, 2011*

**math**

A man agrees to pay $450 per month for 48 months to pay off a car loan. If interest of is charged at 12% compounded monthly, how much did the car originally cost?
*September 12, 2011*

**Reading **

For this question,i think her mother's words inspire her daughter.That's my explaination£¬hope it will help u.
*June 16, 2011*

**Chemistry**

The molar heat capacity of silver is 25.35 . How much energy would it take to raise the temperature of 9.50 of silver by 10.5?
*June 7, 2011*

**calculus**

Use the demoivre's theorem to find the answer? (1+i)^8
*May 20, 2011*

**calculus**

write it in the form of a+ib (1+i)^2 (1-i)^3
*May 18, 2011*

**physics**

Consider the system shown in the figure below with m1 = 30.0 kg, m2 = 13.7 kg, R = 0.110 m, and the mass of the pulley M = 5.00 kg. Object m2 is resting on the floor, and object m1 is 4.60 m above the floor when it is released from rest. The pulley axis is frictionless. The ...
*May 14, 2011*

**Math**

Find the product. (5a+2)³
*May 3, 2011*

**Math**

Mutliply. (9t² - t- 7)(4t²+9t-1) AND Find the product. (5a+2)³
*May 3, 2011*

**Math**

Find the product. (5a+2)³
*May 3, 2011*

**Math**

Multiply. (9t²t-7)(4t²+9t-1)
*May 3, 2011*

**physics - i need A.S.A.P**

An object of mass 1.5 kg is placed on a rough horizontal surface, as shown in Figure 1. Force F acts on the object. When the magnitude of F is 10 N, the object just begins to slide. Determine the coefficient of static friction between the object and the surface. i do not know ...
*May 2, 2011*

**math**

240 feet of fencing material is going to be used. What should the dimensions be to produce a maximum enclosed area.
*April 28, 2011*

**Math**

12 congruent individual plots 8ydx7=56yd 18ydx3=54yd 56yd+54yd=110yd Total length: 110yd -------------------------------- 6 congruent congruent rectangles 4ydx2=8yd 3ydx2=6yd 8ydx4=32yd 6ydx3=18yd 18ydx3=54yd 32yd+54yd=86yd Total length: 86yd
*April 20, 2011*

**physics**

what is cross product or vector product plz explain it in detail.....
*April 18, 2011*

**information systems**

how can we say that a data should be relevant and verifiable?
*April 17, 2011*

**fizik**

b) A ball of mass 3.5 kg starts from rest and slides down a rough inclined plane 60 cm long in 0.6 s. i) Calculate the net force acting on the object along the inclined plane
*April 11, 2011*

**algebra**

Shelly has $175 to shop for jeans and sweaters, Each pair of jeans costs $25, each sweater costs $20, and she buys 8 items. Determine the number of pairs of jeans and sweaters Shelly bought.
*March 30, 2011*

**Math**

Thank you.
*March 21, 2011*

**Math**

Do I add them together, have the answer and then divide by 7 ?
*March 21, 2011*