# Posts by David

Total # Posts: 2,277

**Trigonometry**

find the exact value of sin 2α if cos α=4/5 (α in quadrant I)

**Trigonometry**

find the exact value of tan 2β if sin β=5/13 (β in quadrant II)

**Trigonometry**

evaluate cot 2x = 5/12 with 0<=2x<=pi find cos x and sin x and tan x?

**Trigonometry**

if cot 2θ = 5/12 with 0≤2θ≤π find cos θ, sin θ, tan θ

**Trigonometry**

if cot 2x = 5/12 with 0<=2x<=pi

**Trigonometry**

Write sin(125°) in terms of its cofunction. Make sure your answer is a function of a positive angle.

**pre-alg**

Oh, I get it. The question is asking you what scale you are going to use for your scale drawing. Here is the definition from my Geometry Book: Scale- a ratio that describes how the dimensions in a scale drawing are related to the dimensions of the actual object. An example of ...

**Finance**

If the bank holds $65 million in deposits and currently holds bank reserves such that excess reserves are zero, what required reserves ratio is implied?

**Science**

What is the structure that directs chromosome movement during mitosis and aids in the formation of the microtubule scaffolding that pulls on the chromosomes? a. Centrosome (maybe) b. Nucleosome (don't think so) c. Spindle (maybe) d. Cytokinesis(don't think so)

**Math**

Thank you so much lilly!

**basic rigging trade terms quiz**

an eyeabolt is a piece of rigging hardware wiht a ------ which means it has a series of spiral grooves cut into it.

**basic rigging trade terms quiz**

if the ----- is showing, the sling is not safe for use.

**Math**

26-17+15

**Mythology**

Where did the box with Perseus and Danae float to?

**Mythology**

According to some stories, Daedalus had a talented nephew who was pushed off a tower. Minerva/Athena caught him and changed him into a Perdix. What kind of bird is a Perdix?

**Science**

Thanks.

**Science**

I don't know I think B.

**Science**

So what is the answer?

**Science**

Ribosome: protein synthesis: mitochondria: What comes next? a. cell support b. energy release (don't think so) c. nutrient storage (don't think so) d. protein transport

**Science**

What plant cell organelle contains its own DNA and ribosomes?

**Biology**

What happens when a substance dissolves in the watery solution outside of a cell and equilibrium is disrupted. a. Water from the cell will move into the solution b. water from the solution will move into the cell c. the pores in the cell membrane will become clogged with the ...

**History**

Thanks for all your help Ms. Sue!

**History**

What are the midway islands, Ms. Sue?

**History**

Also, I have another question: During World War I what is a place that has strategic value in the middle of the Pacific Ocean? a. Hawaii b. Midway Islands

**History**

Ms.Sue I am wondering if you know where the Titanic left in Great Britain?

**History**

Well, I asked in class today and the teacher said the questions were right. So, I was thinking that the titanic was sailing between the US and England. I think the 3 countries that make up the triple entente are france, russia, and great britain

**History**

The Titanic was a ship that sailed between which 2 countries? a.Britain b.United States c.England What 3 countries make up the triple entente? a.France b.Russia c.Great Britain d.England Each word can only be used once for each question.

**History**

What 3 slogans used by the government to try to get people to conserve? What law makes it a crime to help the enemy during war? What law makes it a crime to criticize the government during wartime?

**quantum physics**

doing 8b

**quantum physics**

ya, this time

**quantum physics**

got my error 8d ƒÆ= 0 and ϕ = 2bt check and tell me if i am right? 8a ƒÆ = pi/3 and ϕ = 0

**quantum physics**

sorry for that @ss01 your phi is wrong that i am for sure it cannot be 0

**quantum physics**

D ƒÆ = 2Bt phi = pi/2 C - pi/3; 2*B*t do you need explanation ?

**vocabulary**

Shortly before the Russian Revolution, an eccentric man namen Rasputin became (1)

**Biology**

What role do vesicles play in processing the proteins in the Golgi Apparatus? a. They create the proteins.(No) b. They modify the proteins. (No) c. They store the proteins. (Maybe) d.They transport the proteins. (Maybe)

**Biology**

What role do vesicles play in processing the proteins in the Golgi Apparatus? a. They create the proteins.(No) b. They modify the proteins. (No) c. They store the proteins. (Maybe) d.They transport the proteins. (Maybe)

**Geometry**

Write an equation of the line that pass through point P and is perpendicular to the line with the given equation. P(3,5); y=4

**Geometry**

The actual question is : Write an equation of the line that pass through point P and is perpendicular to the line with the given equation. P(3,5); y=4

**Geometry**

Sorry, I meant to say perpendicular instead of parallel.

**Geometry**

Write an equation of the line that pass through point P and is parallel to the line with the given equation. P(3,5); y=4

**Quantum Physics**

seems you are doing a nice deal out here

**Quantum Physics**

jason what happened?

**math**

32

**physics**

A police car, whose siren has a natural frequency of 620Hz, moves away from a wall and towards a stationary observer at a speed of 30km/h. What is the beat frequency perceived by the observer? If the observer stands between the car and the wall, what beat frequency does he ...

**Physics**

That answer is incorrect if in MyPearson

**Physics**

The coefficient of static friction between the 2.90 kg crate and the 35.0° incline of Figure P4.41 is 0.260. What minimum force F must be applied to the crate perpendicular to the incline to prevent the crate from sliding down the incline?

**italian**

se mangi troppi zuccheri puoi avere mal di denti.

**geography (ms. sue)**

why might workers be unwilling to take jobs in siberia?

**physics**

Car a with a mass of 1250kg is travelling at 30m/s to the east. Car b is a truck with a mass of 2000kg, travelling to the west at 25m/s. Assume these two vehicles experienc an inelastic collision but do not stick together and car a goes off 10m/s to the west what will be the ...

**Geometry**

Yes a is equal to b. Thanks for your help!

**Geometry**

But is 5a equal to 5b?

**Geometry**

Substitution Property of Equality: If a=20, then 5a= _____. The substitution rule states that If a=b then a can be substituted for b in any equation or expression. So I think that 5a=5b but the number answer is 100. Am I correct?

**chemistry**

Nope, just working in a study group. Each person asking a question. Thanks for the help. I thought about doing something like that but I was writing them with the noble gas first and that was making it difficult to see the pattern.

**chemistry**

Sort these elements into isoelectronic groups. Into three different boxes/sections. Elements: F- O2- Al3+ S2- Ti4+ K+ He Li+ B3+

**chemistry**

it says "how many joules of energy would be required to heat 29.8 grams of carbon from 25.5 C to 79.3 C. (s= .71 Joules / grams times carbon) & the formula is Q= M x C x delta T .

**chemistry**

it says "how many joules of energy would be required to heat 29.8 grams of carbon from 25.5 C to 79.3 C. (s= .71 Joules / grams times carbon) & the formula is Q= M x C x delta T .

**chemistry**

1138.3004?

**chemistry**

Yeah. What did you get?

**chemistry**

So the answer would be 1233.5 joules?

**chemistry**

How?

**chemistry**

it says "how many joules of energy would be required to heat 29.8 grams of carbon from 25.5 C to 79.3 C. (s= .71 Joules / grams times carbon) & the formula is Q= M x C x delta T .

**Biology**

Glucose + Fructose=__________________. I am thinking it is sucrose or table sugar but I am not sure.

**Math**

In a certain Library, there are r bookcases with s shelves in each book case. If a total of b books is to be distributed among the shelves, What is the number of books per shelf? a) b/rs b) rb/s c) rsb d) r/s-b e) b/s-r

**math**

what is 1/3 of 1/2?

**math**

Total invested = 10,000 X = 4500/10000 = 45% y = 3500/10000 = 35% z = 2500/10000 = 255 1500 profits equally + 500 each As percentage of investment X = 45% X 1500 = 675 675 - 500 = 175 LESS

**Lincoln middle**

What does it mean when # are in () for instance (12)(3)=

**pol 125 - American National Government**

what extent the war on terror justifies the President's indefinite detention of "enemy combatants" without the possibility of the minimal judicial review protected by habeas corpus?

**calculus**

Solve the DE by using the Laplace transform: x''+x=cos(3t), x(0)=x'(0)=0

**math**

29th september

**physics**

A board that is 20 cm wide, 5 cm thick, and 3 m long has a density of 350 kg/m^3. The board is floating partially submerged in water do density 100 kg/m^3. What fraction of the volume of the board is floating above water?;

**Elementary mechanics**

(Q1) 2 forces act on a point object as follows: 100 at 170 and 100 at 50.Find the resultant force (a)110N at 50 (b)110N at 100 (c)100N at 110 (d) 100N at 50 (Q2) given 3 vectors a=-i-4j+2k,b=3i+2j-2k,c=2i-3j+k,Calculate a-(b-c) (a)-6(b)6(d)9(d)-9 (Q3)The resultant of vectors A...

**Math**

(2/25 +13/25) - (2/5 - 14/15)

**(pls help) algebra**

4x+y-32=1, 6x-y-4z=7, 10x+2y-6z=5 pls show me how to solve for x,y,z. Ans:xx=1.5,y=-2,z=1

**(pls help) Trig**

point P and Q are respectively 24m north and 7m east of point R. What is bearing of Q and P to the nearest whole degree.(a)52(b)164(c)134(d)159

**Physics (Stress & Strain)**

That is correct. perimeter of circle x thickness (pi x d) x 0.08m pi x 0.03 m x 0.08 m = 0.0075396 m2 stress = load / area load = stress x area = 670 GPa x 0.0075396 m2 = 670 GN/m2 x 0.0075396 m2 = 5.051532 GN or 5051.532 MN

**statistics**

6. According to the records of Enersource, an electric company serving the Mississauga area, the mean electricity consumption for all households during winter is 1650 kilowatt-hours per month. Assume that the monthly electricity consumption during winter by all households in ...

**statistics**

The pucks used by the National Hockey League for ice hockey must weigh between 5.5 and 6.0 ounces. Suppose the weights of pucks produced at a factory are normally distributed with a mean of 5.75 ounces and a standard deviation of 0.11 ounce. What percentage of the pucks ...

**statistics**

Page 1 of 2 4. Despite all efforts by the quality control department, the fabric made at Benton Corporation always contains a few defects. A certain type of fabric made at this corporation contains an average of .5 defects per 500 yards. Using the Poisson formula, find the ...

**statistics**

3. Magnetic resonance imaging (MRI) is a process that produces internal body images using a strong magnetic field. Some patients become claustrophobic and require sedation because they are required to lie within a small, enclosed space during the MRI test. Suppose 29% of all ...

**statistics**

2. Bender electronics buys keyboards for its computers from another company. The keyboards are received in shipments of 100 boxes, each box containing 20 keyboards. The quality control department at Bender Electronics first randomly selects one box from each shipment and then ...

**Statistics**

1. Let x be the number of heads obtained in two tosses of a coin. The following table lists the probability distribution of x. x 0 1 2 P(x) .25 .50 .25 Calculate the mean and standard deviation of x. Give a brief interpretation of the value of the mean.

**physics PLEASE HELP!**

what are three possible thicknesses that a soap film should be to transmit yellow light ? (Lambda=590nm)

**Statistics**

4. An environmental agency will randomly select 4 houses from a block containing 25 houses for a radon check. a) How many total selections are possible? b) How many permutations are possible?

**Statistics**

3. The following table gives a two-way classification of all basketball players at a university who began their college careers between 2004 and 2008, based on gender and whether or nor they graduated. Graduated Did Not Graduate Male 126 55 Female 133 32 a) P(female or did not...

**Statistics**

. Two thousand randomly selected adults were asked whether or not they have ever shopped on the internet. The following table gives a two-way classification of the responses obtained. Have shopped Have never shopped Male 500 700 Female 300 500 Suppose one adult is selected at ...

**Statistics**

1. The mean monthly mortgage paid by all home owners in a town is $2365 with a standard deviation of $340. a) Using Chebyshev’s theorem, find at least what percentage of all home owners in this town pay a monthly mortgage of (i) $1685 to $3045 & (ii) $1345 to $3385 b) ...

**Accounting**

A = 500000 b = 40

**fundamentals**

Calculate the total constant force needed to accelerate a vehicle with mass 1400kg and tractive resistance of 320N from 19km/h to 95km/h over a distance of 0.8km on a horizontal plane.show working?

**fundamentals**

A playground has its highest point 2.2m above the lowest point, and the slide is 4.9m long. If the average resistance to motion is one-fifth of the weight of the child(mass 40kg), find the speed at which the child reaches the bottom show working?

**9/11**

What was your response to the 9/11 attacks when you first found out about it? I need to interview some people and get their answers to this question.

**Phyics Toughest question on earth**

Dude Can`t Understand Please Help

**physics**

why does it take a longer time for a kilogram of water than a kilogram of copper to reach the same temperature?

**Physics**

Two forces act on a 55-kg object. One force has the magnitude 65 N directed 59 clockwise from the positive x-axis, and the other has a magnitude ofm35 N at 32 clockwise from the positive y axis. What is the magnitude of acceleration?

**Ethics**

HIPAA, GLB, and COPPA laws can help ensure people's privacy. What is their ethical justification? Is there gray area in these laws? How do some businesses try to find their way around these laws

**math**

If 1/cos - cos=a^3 and 1/sin - sin=b^3 Show that tan=a/b

**Accounting**

B) $6; $3

**ethics**

ok well I'm just confused about the whole idea of "human moral predicament" and meta-ethical... I get that Nietzsche and Wittgenstein both have ways of showing what is good and bad, and they both have there reasons. But again, when it comes to the human moral ...

**ethics**

Both Nietzche and Wittgenstein raise the issue of the morality of morality. In other words, they ask "Why should someone be good?" Describe the different ways in which Wittgenstein and Nietzsche understand the human moral predicament i.e. the challenge of asserting ...

**CHEMISTRY**

how would a chemistry student make a 600 mL of 1.5 M solution of NaBr?

**CHEMISTRY**

how would a chemistry student make a 600 mL of 1.5 M solution of NaBr?