# Posts by Dylan

Total # Posts: 513

**Math**

Simplify and write the trigonometric expression in terms of sine and cosine: ((2+tan^2 x)/(sec^2 x))-1 = (f(x))^2 f(x)= ??

**Chemistry**

If you dilute 12.5 mL of a 3.5 M solution to make 213.8 mL of solution, what is the molarity of the dilute solution?

**Math**

Factor 4xsquared-36x+81=0

**Math/Physics**

Two kg of water at a temperature of 50 degrees C have 485.3 kJ of heat transferred from them, resulting in a mixture of ice/water at 0 degrees C. What is the composition of the mixture? This is what I did and would like verification of my answer. 2*4.183*-50 = -418.3 kJ I then...

**Math/Physics**

A quantity of water at 87 degrees C is cooled at a rate of 2844 MJ/h. After 40 minutes, the water has changed to ice, having a temperature of 243K. Calculate the mass of the water/ice. I know 243K = -30 degrees C I'm assuming I have to use my sensible and latent heat ...

**Math/Physics**

If 55034.175 kJ of heat are transferred to 150 kg of ice at a temperature of -12.15 degrees C, calculate the temperature of the resulting water. I know my formulas for sensible and latent heat but don't know how to approach this.

**CALCULUS**

For some positive constant C, a patient's temperature change, T , due to a dose,D , of a drug is given by T=(c/2-D/3)D^2 What dosage maximizes the temperature change The sensitivity of the body to the drug is defined as . What dosage maximizes sensitivity?

**Calculus**

Find constants a and b in the function f(x)=axe^(bX) such that f(1/8)=1 and the function has a local maximum at x=1/8.

**Physics**

A boat is pulled through a canal by horses walking parallel to the canal and exerting a force of 1000 N on a tow rope 40 meters long. If the distance from the boat to the horse track is 15 meters, what is the magnitude of the effective component pulling the boat forward?

**consumer math**

amy miller's insurance policy has a $218.00 premium for 25/100 bodily injury limits and $25,000.00 property damage limits. the collision premium is $74.00. amy's driving-rating factor is 2.4. what is her annual premium?

**Chemistry**

A compound of Tin Sulfate is decomposed in the lab to give 1.91g of Tin, 1.03 grams of Sulfur, and 2.06g Oxygen. Determine if this is a compound of Tin(II) Sulfate or Tin(IV) Sulfate.

**Physics**

A person standing at the edge of a seaside cliﬀ kicks a stone over the edge with a speed of 21 m/s. The cliﬀ is 52 m above the water’s surface. How long does it take for the stone to fall to the water? The acceleration of gravity is 9.81 m/s^2. Thanks!

**algebra**

Ahh makes much more sense when Reiny did it. I remember learning this in algebra. I have a tendency to give everything its own variable, which makes the problem impossible to solve i guess.

**algebra**

x + y = 1,100 a + b = 49 (x+5%) + (y+2%) = 1,149 That's all I could take from the question. Now how you solve and get the answer is beyond me.

**Proportions**

It just depends on how the problem is actually written. Is 3y-8 all over 12 or is 8 just over 12? Because I solved 3y - (8/12) = (y/5), not [(3y-8)/12]= (y/5)...its just all in how you type your question.

**Proportions**

y=5/21

**Literature**

Makes so much more sense now! Thank you! I looked up the definition of connotation, even though I thought I knew it, and that made it much easier to understand when I re-read it. You're right, storm is the big "problem" word!

**Literature**

Hmm, that's interesting how no teacher of mine ever thought to tell me that. So now my problem is how do I consider it as a 'whole'? and should i be looking at the words literally or figuratively?

**Literature**

The question is asking about problems in her life, so yes 'where the storm is over' could mean where the problems end when she dies, but i could also show that the other answers could say something about challenges in her life. "On this wondrous sea" could be...

**Literature**

Well if I had not read online that Emily Dickinson wrote a lot of poems about death, then I probably wouldn't have a clue to what it implies. However, I'll say it implies that "the storm" or the bad parts of her life is "o'er" or over or finished.

**Literature**

I just can't seem to figure this out. In the poem "On this wondrous sea" by Emily Dickinson, which live indicates that the speaker has encountered challenges in her life? A. On this wondrous sea B. Sailing silently c. Their anchors fast d. Where the storm is o&#...

**Math**

What is the three digit mystery number? Clues: It is less than 300, the tens digit is 4 more than the hundreds digit, the sum of the digits is 9, the hundreds digit is 2 less than the ones digit.

**This needs tobe turned in in 10min AT MOST URGENT!**

1.) 24 2.) q = -3 3.) 3 (x - 10) = 15 4.) x - 14.5 = 156.5 5) 50 weeks

**Msth**

Okay, so this utterly confused me... The real answers are: 1.) C 2.) B 3.) D 4.) A 5.) C

**math**

look at the table of 9s facts. Is there another number pattern in the multiples of 9? Explain

**Science**

Why are pi and pi* (anti-pi) transitions on conjugated double bonds such good absorbers of visible light?

**math**

A man is six feet tall and casts a shadow 4 feet long. At the same time a child is 4.5 feet tall, how long is her shadow?

**Math for Steve**

1.) C 2.) B 3.) D 4.) A 5.) B

**ALGERBRA,PLEASE HELP!!!!!!**

It's 1.) (-2,4) and (6,-6) 2.) (0,0), (0,1), (2,0) 3.) 2.25 4.) 2

**algebra 1**

micheal earns 6% commission on his sales. If he earned $1,800 in commission, how much equipment did he sell?

**physics**

A ferry is crossing a river. The ferry is headed due north with a speed of 1.1 m/s relative to the water and the river’s velocity is 4.2 m/s to the east.Find the direction in which the ferry is moving (measured from due east, with coun- terclockwise positive)

**algebra 1**

find the length of the following segment created by these pairs of endpoints: (0,1), (6,6)

**algebra**

how do I solve 10x198=(10xM)-(10x2)

**math**

9!/(1!*3!*3!) you take the total amount of letters you have factorial, divided by each of you different types of letters factorial. the reason that there is a 1! in the beginning is because you have the first two A's in the front, so they won't be going anywhere, ...

**Synonym**

A synonym for "contrivance" will be spontaneity penance or strategy?

**Math**

Three fair dice are rolled, and all outcomes are equally likely. What is the probability that the sum of all the numbers on the dice is at most 6?

**Math**

Three fair dice are rolled, and all outcomes are equally likely. What is the probability that the sum of all the numbers on the dice is at most 6?

**C# Programming**

There are three seating categories at an athletic stadium. For a baseball game, Class A seats cost $15 dollars each, Class B seats cost $12 each, and Class C seats cost $9 each. Create an application that allows the user to enter the number of tickets sold for each class. The ...

**math**

998877665544332211

**Math**

Al the answers for the worksheet d-30 pizzazz for all math problems

**Physics**

A helicopter traveling upward at 106 m/s drops a package from a height of 500 meters. To the nearest second how long does it take to hit the ground? I'm not sure what numbers to use. What formula to use or anything.. I think 106 m/s is the Vo^2 and 500 m is the h? I had a ...

**College Physics I**

A helicopter traveling upward at 120 m/s drops a package from a height of 500 meters. To the nearest second how long does it take to hit the ground?

**english III**

Who loved his charge but never loved to lead; One whose meek flock the people loved to be, Not lured by any cheat of birth. Which other type of substitute foot is used?I am having a hard time with poetry.

**HEALTH**

thank you

**math**

johnny at 1/2 of a pizza, sue has 1/2 of another pizza, johnny said he ate more than sue, but sue says they both at the same amount, is johnny right?

**math**

Find the balance in an account that has $700 invested at 5.5% for 4 years compounded semi-annually.

**Grammas and Composition 11th grade**

I PURCHASED A USED BOOK TO COMPLETE A CORRESPONDENCE COURSE. PAGE 291 AND 292 IS MISSSING AND I NEED QUESTIONS 15-20. CAN SOMEONE HELP ME?

**Grammar and composition**

on page 807, Exercise B it wants me to amswer the questions and name the reference book I used to find the answer. Question 10 is "What is the number of Buddhists in North America?

**writing essay**

is the answer D?

**Calc**

a fast food place sells 425 large orders of fries per week at price $2.75 each. A market survey indicates that for each $0.10 decrease, sales will increase by 20 orders of fires a) Determine the ,marginal revenue function b) With what price with marginal revenue be equal to ...

**Health**

No it just occurred to me as something intriguing. I don't see how anyone can argue that it's ok for waiters and waitresses to not wear hats/hairnets or gloves but apparently it's ok because restaurants pass health inspections. I have eaten at many restaurants and ...

**Health**

At the dining halls I work out all employees must wear hats or hairnets and gloves at all times no exceptions! At all the restaurants I have ever eaten at I have never seen waiters or waitresses wear gloves or hairnets/hats ever! I feel as if this a huge sanitation violation ...

**Math Models**

Are the functions y-5=6(x-3) and y=6x-13 equal?

**Math**

Given two points for a graph: max=3.224 and min=4.664 find the midline and amplitude.

**chemistry**

The reaction described by the equation Zn + Hg2Cl2 <--> 2Hg +Zn+2 + 2Cl is run on electrochemical cell. The E^0 of the cell at 25 degrees C is 1.03V. In the same cell, [Cl-]=.10 M and [Zn+2] is unknown, and the measured cell voltage is 1.21V. Compute the value of [Zn+2] ...

**algebra**

write an expression in simple form to represent the perimeter of a rectangle whose length is represented by 3x+1 and width is represented by 5x-6

**Chemistry 1201**

An unknown compound contains only carbon, hydrogen, and oxygen (C?H?O?). Combustion of 6.50 of this compound produced 9.53 g of carbon dioxide and 3.90 g of water. 1) How many moles of Carbon? 2) How many moles of Hydrogen?

**adding fractions**

what does one half plus one third equal?

**CALCULUS**

I'm currently on the same question after spending over 2 hours on it... What did you get?

**Chemistry**

consider the following reaction: 2CH3OH(g) yields 2CH4(g) + O2(g) change in enthalpy= 252.8kJ How many kilojoules of heat are released when 38.4 g of CH_4 g) reacts completely with O2 (g) to form CH3OH (g) at constant pressure?

**geometry**

how long is a stage that is 6 meters wide with an area of 48 sq meters?

**geom/trig**

i believe that you set it up like cos(x)= a/h a= 11 feet h= 40 feet then you take the inverse cos of 11/40

**Chemistry**

yes all of these parts are derived from the same problem How many kilojoules of heat are released when 38.4 g of CH4 (g) reacts completely with O2 (g) to form CH3OH (g) at constant pressure?

**Chemistry**

For a given sample of CH3OH, the enthalpy change during the reaction is 82.6 kJ. How many grams of methane gas are produced?

**Chemistry**

consider the following reaction: 2CH3OH(g) yields 2CH4(g) + O2(g) change in enthalpy= 252.8kJ Calculate the amount of heat transferred when 26.0 g of {\rm CH_3OH} (g) is decomposed by this reaction at constant pressure.

**CHEMISTRY**

which of the following represent a buffer system? A.) NaOH and NaBr B.) HF and NaF C.) HC2H3O2 and C12H22O11 D.) HCl and KOH

**CHEMISTRY**

write the conjugate acid for the following: A.) NO3- = B.) HPO4^2- = C.) Br- = D.) S2- =

**chemistry**

write the conjugate base for the following: A.) HCN= B.) HPO4^2- = C.) NH4+ = D.) HC2H3O2=

**Physics**

A satellite has a mass of 6000 kg and is in a circular orbit 3.30 105 m above the surface of a planet. The period of the orbit is two hours. The radius of the planet is 4.20 106 m. What is the true weight of the satellite when it is at rest on the planet's surface? I know ...

**Physics**

If a shoe is dropped from a height of 40m, what is its speed after falling for two seconds?

**math**

Two fractions have the same denominator. Which is the greater fraction: the fraction with the greater numerator or the lesser numerator?

**Math**

just do 120 divided by 20 the answer you get will be the number of hours it took him.

**science**

i need to find a website that has a picture of hafnium lamp filaments

**science**

on what website can i find info on things made of the element hafnium:a picture,how it's made, and why it is made with hafnium.

**SCIENCE**

pretend that the pattern is 1212312123. you would label it 12123.

**College Physics**

On planet Z, the standard unit of length is the foose. Ann the Astronaut is 5.90 feet tall on earth. She lands on planet Z and is measured to be 94 foosi tall. Her partner Rachael is 88 foosi tall. How tall is Rachael on Earth?

**Chemistry**

1050 grams

**Physics**

An astronaut of mass 70 kg carries an empty oxygen tank of mass 14 kg. He throws the tank away from himself with a speed of 3 m/s. With what velocity does the astronaut start to move through space?

**math**

if a hexagon has two right angles, what is the sum of the measures of the remaining angles?

**algebra**

A bag contains 4 orange marbles, 11 blue marbles and 1 yellow marble. What is the probability of drawing a blue followed by another blue without replacement? Not sure what to do?

**calculus**

F(x)=e^(-3x/2) Let R be the region between the graph of f and the x-axis on the interval 0 to 1 . Find the volume V of the solid of revolution generated by revolving R about the x-axis. Give both exact (symbolic) and approximate (numeric) answers.

**english**

what is the adverb in the sentence They are always late for ballgames. is it always

**English**

A good writer makes events in a story occur plausibly. The action should be consistent with the characters; if the author forces them into uncharacteristic behavior in order to advance the plot, the story will seem artificial. In "Thank You, M'am, " by Langston ...

**Science (Chemistry)**

I'm not sure how to do a couple of problems on my chemistry worksheet. Can you please help me? You dissolve 0.00902 g of naOH in enough water to make 1000 mL. What is the Ph of this soultion. What is the molarity, pH, and pOH of 5.00 of naOH in 750.0 mL of soultion. I know...

**Math**

Robert gave one-half of his marbles to Dean. Then he gave two-thirds of the remaining ones to Mark. If he ended up with 10, how many did he have when he stsrted?

**Geometry**

7x-54+180-8x+180-8x=180 The answer comes out to 14.

**Physics**

A crow is flying horizontally with a constant speed of 2.50 m/s when it releases a clam from its beak. The clam lands on the rocky beach 2.20 s later. Consider the moment just before the clam lands. (Neglect air resistance.) A) What is its horizontal component of velocity? B) ...

**Physics**

In Denver, children bring their old jack-o-lanterns to the top of a tower and compete for accuracy in hitting a target on the ground. Suppose that the tower height is h = 9.80 m, and that the bulls-eye is a horizontal distance of d = 3.2 m from the launch point. If the pumpkin...

**math**

What i think is Samuel because he gets 6 DVDs and he's only paying a little bit more

**physics**

hiuhuifj20mijioorz

**Math**

If you jog for half an hour everyday for nine days. Write an improper fraction that shows the total number of hours you jogged.

**Math**

If you jog for half an hour everyday for nine days. Write an improper fraction that shows the total number of hours you jogged.

**Math**

If you jog for half an hour everyday for nine days. Write an improper fraction that shows the total number of hours you jogged.

**chemistry**

N2 (g) + 3H2 (g) → 2NH3 (g)ΔH = -92.6 Calculate ΔH (in kJ) for the decomposition of 30.5 g NH3 (g) into N2 (g) and H2 (g)

**Science**

D?

**Science**

I tried but I cant find it.:O

**Science**

Which of the following quickly changes the land when gravity pulls loose rocks and soil down the side of a hill? A)a volcanic eruption B) an earthquake C) a fault D) a landslide

**Pre-Algebra**

Make a table with all the whole number pairs of length and width values that give an area of 24 square meters.

**math**

graph the points in each group and connect each point with the next point using straight line segments. Do not connect the last point in one group with the first point in the next group.

**Physics**

Its C because its moving