# Posts by blake

Total # Posts: 283

AP Chemistry
If the heat of combustion of 1-butanol (C4H9OH) is 2,710 kJ/mol, what mass of oxygen is consumed when enough 1-butanol is burned to yield 26,400 kJ of energy? I have no clue where to begin I thought to use enthalpy but it didnt work

AP Chemistry
If the heat of combustion of 1-butanol (C4H9OH) is 2,710 kJ/mol, what mass of oxygen is consumed when enough 1-butanol is burned to yield 26,400 kJ of energy? I have no clue where to begin I thought to use enthalpy but it didnt work

arithmetic
Elise does not like sorbet so she omits that ingredient and adds 5 percent of each of the other ingredients how many cup of punch will she have if she uses 6 cups of orange juice?

arithmetic
how many cups of sorbet are used in 8 cups of punch? Ginger Ale- 40% Orange Juice- 25% Pineapple Juice- 20% Sorbet- 15%

geometry
Find the area of the region between a regular hexagon with sides of 6" and its inscribed circle.

math
Two ships leave a port at 9 a.m. One travels at a bearing of N 53° W at 12 miles per hour, and the other travels at a bearing of S 67° W at 19 miles per hour. Approximate how far apart they are at noon that day. (Round your answer to one decimal place.)

Physics
A 30-W led bulb and a 90-W led bulb are wired in the parallel to a 120-V source. You plug in a third bulb in parallel with the other two and the current increases to a 4.5-A, what is the wattage of the bulb you added? Please explain how you got the answer in steps.

Science
When the temperature equals the dew point, what is the relative humidity? A.zero B.10% C.50% D.100%

counseling
Which test is among the most commonly used intelligence instruments?

chemistry
How many grams of potassium iodide, KI, are required to make 2.0 L of a 0.1M solution?

MATH
R = u2/u1 = u2/u2 = u4/u3 6/3-x = 7-5x/6

MATH
if (3-x)=6, (7-5x) are consecutive terms of GP with common ratio r>0, fing d value of (x) and d common ratio. thanks

English
What is the simple subject of the following sentence? Several sites on the internet give information about extreme sports. I believe the simple subject is: sites

Algebra
Charlie's wallet contains 3 ones, 2 fives, 2 tens, and 4 twenty dollar bills. ?Charlie randomly grabs a bill from his wallet, replaces it, and grabs another bill. What is the probability that the sum of the two bills is \$25? Maybe 6/25 or 6/110. I am confusing myself now ...

Chemistry
50 L of your 0.05M sodium. chloride solution, what volume of 1.25M solution would be necessary?

Algebra
PLEASE HELP ME :( Brandon flips two fair coins multiple times and records the frequency of the results in the following table. 50 trials|125trials|150trials HH 10 33 37 TH 9 31 38 HT 13 28 38 TT 18 33 37 DETERMINE THE EXPERIMENTAL PROBABILITY AND THEORETICAL PROBABILITY FOR ...

Algebra

Algebra
Brandon flips two fair coins multiple times and records the frequency of the results in the following table. 50 trials|125trials|150trials HH 10 33 37 TH 9 31 38 HT 13 28 38 TT 18 33 37 DETERMINE THE EXPERIMENTAL PROBABILITY AND THEORETICAL PROBABILITY FOR EACH OUTCOME IN EACH...

I think the first question, A six sided number cube is rolled and a coin is flipped. What is e probability that the number on the cube is less than 4 and the coin lands on heads? I think the answer is 1/4. 1/2 * 1/2 is .25 which is 1/4 I think I got it :O

Algebra
Brandon flips two fair coins multiple times and records the frequency of the results in the following table. 50 trials|125trials|150trials HH 10 33 37 TH 9 31 38 HT 13 28 38 TT 18 33 37 DETERMINE THE EXPERIMENTAL PROBABILITY AND THEORETICAL PROBABILITY FOR EACH OUTCOME IN EACH...

A six sided number cube is rolled and a coin is flipped. What is e probability that the number on the cube is less than 4 and the coin lands on heads? I think the answer might be 1/3. Heads and tails is 1 and less than 4 is 3. I am not sure.

Algebra
CORRECTION ON THE QUESTION: THE QUESTION WAS SUPPOSE TO SAY 2 RED MARBLES, NOT 3 RED MARBLES SEE CORRECT QUESTION BELOW, A bag of marbles contains 3 yellow marble, 2 red marbles, and 5 green marbles. If a marble is chosen, put back in the bag and then a second marble is chosen...

Algebra
A bag of marbles contains 3 yellow marble, 3 red marbles, and 5 green marbles. If a marble is chosen, put back in the bag and then a second marble is chosen, what is the probability that both marbles will be red? I think it is 2 red 10 all together 2:10 2/10 = 1/5 But I am not...

Algebra
how would you solve (3_/8)(2_/6) using multiply and simplifying.

Math
What does a curved surface and a circle make? a. sphere b. cone *** c. cylinder d. The two shapes won't form a geometric solid.

Algebra
A silo is filled at a constant rate for a total of 10 hours. Number of Hours---Amt of Corn(cu ft) 0----------------- 0------------- 3------------------2475--------- 5------------------4125---------- 8------------------6600---------- Enter the "percent" of the silo ...

Algebra
HOURS STUDYING AVG GRADE 0 62 1 78 2 85 5 74 WHICH TYPE OF FUNCTION IS MOST LIKELY TO MODEL THESE DATA? A. LINEAR FUNCTION W/POSITIVE SLOPE B. LINEAR FUNCTION W/NEGATIVE SLOPE C. NON-LINEAR THAT DECREASE THE INCREASE D. NON LINEAR FUNCTION THAT INCREASES THEN DECREASES

Algebra
Given the explicit formula, find the 15th term of the sequence: a(n) = -4n + 1

Algebra
Solve using substitution 5x-2y= 0 and 3x=y =-1

social studies
To which system of government is the federal system most similar? A - The Unitary system B - The confederal system C - The Unitary System D - The confenderal System ******

Physics
An Alaskan rescue plane traveling 38 m/s drops a package of emergency rations from a height of 105 m to a stranded party of explorers. The acceleration of gravity is 9.8 m/s2. Where does the package strike the ground relative to the point directly below where it was released? ...

Chemistry
i'm not sure, but it wants to combine the two half reactions into a full reaction.

Chemistry
Yes, I understand how to split it up with the e-, but what is the final overall balanced equation?

Chemistry
Write an overall balanced equation for these unbalanced half-reactions: In --> In3+ Cd2+ --> Cd I multiplied both sides by integers to get the electrons to be equal on both sides but I don't know what the final overall balanced equation looks like.

Science
Which of the following land regions should show the greatest similarities in fossil types?

Math
How do you find the slope of -5x+3y-8=0

History
so its Great Britain

Math
1.A scientist is studying the growth of a particular species of plant. He writes the following equation to show the height of the plant f(n), in cm, after n days: f(n) = 12(1.03)n Part A: When the scientist concluded his study, the height of the plant was approximately 16.13 ...

Physics
The mass of the heavier block is 22 kg and the mass of the lighter blocks is 11 kg and the magnitude of the force of the connecting string on the smaller block is 13 N. Assume: g = 9.8 m/s 2 and the horizontal surface on which the objects slide is frictionless. Determine the ...

Algebra
A student keeps track of his target heart rate when he is exercising. The range for the number of heart beats per minute R for someone his age is /R-136/ less than or equal to 20. Determine the solution to the inequality. I believe the answer is: (116,156). Am I correct? /R-...

Math
Solve t+1-4t+8=21

Chem
You have 25.00 mL of 3% by mass solution of hydrogen peroxide. Assume the density of this solution is 1.00 g/mL. If all of the hydrogen peroxide decomposes to water and oxygen according to the reaction below: 2H2O2 (aq) <--> 2H2O (l) + O2 (g) What is the total volume of ...

Physics
Ball A is kicked at 40° above the horizontal. Ball B is kicked with the same horizontal component of velocity but at 55°. The speed of A is ( >or< ) the speed of B. The time A is in the air is ( >or< ) the time B is in the air. The range of A is ( >or&...

Science
If it is snowing in Great Neck, what type of air mass must be present?

Science
WHICH SYSTEM HAS THE GREATEST TIDAL EFFECT? EARTH-SUN OR EARTH-MOON?

Math
Women make up 5% of all film directors. There are 122,500 film directors working. How many women are directing films?

math
Two towns on a map are 2 1/4 inches apart. The actual distance between the two towns is 45 miles. what does one inch on the map represent?

english
A?

english
20. Which of the following statements would be considered a hasty generalization? The sun is at its highest point between 10 a.m. and 2 p.m. The elderly are often resistant to advances in technology. When it snows, bridges tend to freeze before the roads do. Children should ...

calculus trigonometric substitution
∫ dx/ (x^2+9)^2 dx set x = 3tan u dx = 3 sec^2 u du I = 3 sec^2 u du / ( 9 tan^2 u + 9)^2 = 3 sec^2 u du / ( 81 ( tan^2 u + 1)^2 = sec^2 u du / ( 27 ( sec^2 u )^2 = du / ( 27 sec^2 u = 2 cos^2 u du / 54 = ( 1 + cos 2u) du / 54 = ( u + sin 2u / 2) / 54 = ( arctan x/3 + ...

physics
A projectile of mass 0.803 kg is shot straight up with an initial speed of 24.8 m/s. (a) How high would it go if there were no air resistance? (b) If the projectile rises to a maximum height of only 9.36 m, determine the magnitude of the average force due to air resistance

Physics
Chinook salmon are able to move through water especially fast by jumping out of the water periodically. This behavior is called porpoising. Suppose a salmon swimming in still water jumps out of the water with velocity 6.41 m/s at 44.1° above the horizontal, sails through ...

Ms. Sue
okayy! I know Writeacher haven't read it

Ms. Sue
it's ok (: Happy new year !! :D

Ms. Sue
have u read the book "the little prince" by Antoine de Saint-Exupéry

novel question
thanks for the help! (: & happy new year !! :D

novel question
it just talks about how the businessman only cares about owning the stars and getting rich so he could buy more , but i don't exactly know what the little prince learns from that So could you help ??

novel question

novel question
in the book "the little prince" by Antoine de Saint-Exupéry what did the little prince learn from the businessman ??

Comm Arts
3 differences between the book and the movie "The Prince and the Pauper".

I have a business project with entrepreneurs. And one of the entrepreneurs was perceptive. We have to use a body part to represent it. Which would you use? And why?

A restaurant says their sales are \$650000. Would that (sales) mean revenue or profit?

chemistry
The density of pure copper is 8.96 at 20°C. If 6.50 g of pure copper pellets is added to a graduated cylinder containing 13.4 mL of water, to what volume level will the water in the cylinder rise

Psychology
Can someone reword this for me? I am having problems comprehending the question. The question is: If psychological needs have presumptive brain or physiological correlates, are they still psychological needs?

physics
A person of mass M lies on the floor doing leg raises. His leg is 0.85m long and pivots at the hip. Treat his legs (including feet) as uniform cylinders, with both legs comprising 34.5% of body mass, and the rest of his body as a uniform cylinder comprising the rest of his ...

physics
Cheetahs can sustain speeds of 25 m/s over short distances. One of their prey is Thomson's gazelle, with top speed about 22 m/s. If a 52kg cheetah running southward at top speed grabs and holds onto a 23kg gazelle running westward at 22 m/s, find the velocity of these ...

Histroy
Its not A, I know that it was definitely not D either. So have fun!

geometry
In a triangle MNO with altitude NP with MP of 15 and NP of 9 what is the length of PO? MNO creates a right angle!

physics
it is pretty simple. to find the magnitude use the pythagorean theorem to find the resultant and then to the tangent inverse to find your angle

English
All answers given are 100% correcct

Chemistry
A gaseous mixture contains 413.0 Torr of H2(g), 372.1 Torr of N2(g), and 70.1 Torr of Ar(g). Calculate the mole fraction, X, of each of these gases.

Chemistry
I don't know why this posted again. Sorry and I have some questions. How do I find the Ph2 and PN2?

Chemistry
A gaseous mixture contains 413.0 Torr of H2(g), 372.1 Torr of N2(g), and 70.1 Torr of Ar(g). Calculate the mole fraction, X, of each of these gases.

Chemistry
If an ideal gas has a pressure of 5.63 × 105 Pa, a temperature of 401 K, and a volume of 0.0313 m3, how many moles of gas are in the sample?

Chemistry
An aerosol can is empty, except for the propellant gas which exerts a pressure of 1.20 atm at 21 °C. If the can is thrown into a fire and heated to a temperature of 565 °C, what will be the pressure inside the hot can?

science
I need to make an acrostic for the word kinetic

Boston Tea Party
another question: This was Governor Hutchinson's fault right? because Sam Adams and the Sons of Liberty demanded that the ships leave the harbor.

Boston Tea Party
With the Boston Tea Party was it a group of British colonists who boarded the ships and destroyed the tea by dumping it in the Boston Habor?

bio/animals
Do cows give birth to ox's? I was reading that an ox is just a castrated bull.

Angular Resolution
An astronomer wants to determine whether or not he or she can photograph Castor and Pollux at the same time on a 5 x 8 inch plate using a lens system with a 1200 mm focal length. If the two stars are approximately 5 degrees apart, will it be possible to make the photograph?

Optics/Physics
Predict the size of the image of Jupiter if photographed at opposition with a lens having a focal length of 9600 mm. (Assume Jupiter is a disk of 1.43 x 10^5 km and is 6.29 x 10^8 km from the Earth.)

Physics/Optics
What would the image size of the moon be if you photographed it at Cassegrain focus of a 24-inch telescope with a focal length of 9600mm?

Optics
Predict the size of the image of Jupiter if photographed at opposition with a lens having a focal length of 9600 mm ( Assume Jupiter is a disk of 1.43 x 10^5 km and is 6.29 x 10^8 km from the earth).

Physics/Astronomy
Predict the size of the image of Jupiter if photographed at opposition with a lens having a focal length of 9600 mm ( Assume Jupiter is a disk of 1.43 x 10^5 km and is 6.29 x 10^8 km from the earth).

physics
An object whose height is 0.670 meters is located 2.00 meters from the face of a thin convex lens with a focal length of 0.780 meters. The image will be located ______ meters away from the lens.

The answer to thie problem is 84/100

Math
3. -5 + -2

Math
3. (-5)-(-2)

Math
2. -18 + 2

math
-_- I will stare at u foever.

math
U all are terrible. I'm a uneducated professer.

math
Wronge! ,,!,,,,!!!!!!!!!!!!!!!

math
write the simplest form 2.30

Physics
a plane is 521 meters horizontally from its intended target traveling at 62.5 m/s in order to hit the intended target from that distance how high is the plane in meters

biochemistry
2. Given the following data, calculate the Keq for the denaturation reaction of β-lactoglobin at 25 oC. Δ Ho = -88 kJ/mol, Δ So = 0.3 kJ/mol

biochemistry
1. Walking consumes approximately 100 kcal/mi. In the hydrolysis of ATP (ATP → ADP + Pi), the reaction that drives the muscle contraction, ΔGo’ is -7.3 kcal/mol (-30.5 kJ/mol). Calculate how many grams of ATP must be produced to walk a mile. ATP synthesis is ...

literature
An author of a detective novel is most likely to use figurative language to

Chemistry
1.What is the pH of a solution containing 0.042 M NaH2PO4 and 0.058 M Na2HPO4 ? The pKa of sodium phosphate is 6.86. pH = 6.86 + log [0.058] / [0.042]; pH = 6.86 + 0.14; pH = 7.00 That is my answer to the above question. The following question is what I am having trouble with...

math
if you buy 30 apple for 47 dollars how much does 1 apple cost

Math
Prove 1+sec2x / tan2x = cotx

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