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Posts by jaime

Total # Posts: 123

Math - Calculus
Compute the sum: 81 ? (2i-1) i=1

Calculus
The point on the parabola y=x^2 that is closest to the point (2,1/2) is (___,___). The distance between the two points is _______.

Calculus - Newton's Method
Use the Newton's Method to approximate the real root of the equation: f(x)=x-2+cosx=0 a) What is the iterative equation of Newton's method of the given equation? b) Iterate the equation with starting point x1=5 until you get a repetition of the four digits after the ...

geometry
The diagonal of a rectangle is 25 meters long makes an angle of 36 ° with one of the rectangle. Find the area and the perimeter of the parallelogram. how to find the b to arrive to the area?

geometry
The diagonal of a rectangle is 25 meters long makes an angle of 36° with one side of the rectangle. Find the area and the perimeter of the parallelogram.

Calculus
Let F(x) = (x+1) / (x^2-16). Use the definition of the derivative to compute f'(x) and give its domain. Show all steps.

calculus
find the limit without using L'Hopital's Rule Lim(X->-4) (16-x^2 / x+4)

social studies - WW1
in 1914, which neutral nations joined allies later? Also, which neutral nations joined central powers later? Why would Germany worry about the alliance between France and Russia? Based on the map, which alliance had a greater advantage in 1914? Explain

Math
Cheryl does a 2 mile warm up trail run at one rate for half of her workout. In the same amount of time she runs an additional 3 miles at a rate that is 2 mph faster. Find Cheryl's rate for her 2 mile warm-up run and for the 3 mile portion of her run.

Math
Which is greater, the greatest whole number with 4 digits or least whole number with 5 digits

Chemistry
How do can you find the difference between these acids/bases with only one indicator? We have 0.1M NaOH, H2SO4, HCl, AlCl3, and Na2CO3. We know the pH of all the solutions (AlCl3 = 2.9, H2SO4 = 0.7, HCl = 1, Na2CO3 = 11.8, NaOH = 13). We only can use 1 indicator to determine ...

Science
25 g of Iron (II) Oxide reacts with 25 g of Chloric acid to produce Iron (II) chlorate and water. a. Determine the limiting reactant b. Determine the excess reactant c. Determine the theoretical yield of water d. Determine how much excess reactant is left e. Determine the ...

Science
18 g of hydrochloric acid reacts with 15 g of calcium hydroxide produce calcium chloride and water.

algebra
One sixth of a certain number and three-eighths of the same number total 13. What is the number

math
Rebecca has a lanyard that is 16.4 inches long. She cuts the lanyard in 3.5 inch pieces. How many whole pieces did she cut?

Physics
A pilot maintains a heading due west with an air speed of 240 km/h. After flying for 30 min, he finds himself over a town that he knows is 150 km west and 40 km south of his starting point. a) What is the wind velocity, in magnitude and direction? b) What heading should he now...

Physics
The university skydiving club has asked you to plan a stunt for an air show. In this stunt, two skydivers will step out of opposite sides of a stationary hot air balloon 2,500m above the ground. the second skydiver will leave the ballon 20 seconds after the first skydiver but ...

LA
Lucia Vendales IS RIGHT!!!!!!!!!!!! TYSM !!!!

alegebra
I am a senior failing this class last chance to make it up by graduation. Can't do diploma plus either. Thanks anyway. Lost cause I guess

alegebra
Totally lost.

alegebra
A cup of coffee milk is 35% coffee syrup with a second cup of coffee milk that is 65% coffee syrup. How many kilograms of each cup of coffee milk must be combined to get 20 kilograms of coffee milk that is 41% coffee syrup

English
What is one example of the Gothic characteristic morbidity ? Please help me

science
An athlete executing a long jump leaves the ground at a 27.7∘ angle and travels 7.60m.If this speed were increased by just 5.0%, how much longer would the jump be?

Trig
I need to the steps to get (1-sinx)(1+sinx)=cos^2 x

physics
A superhero is running toward a skyscraper to stop a villain from getting away. As he is moving, he looks up at the top of the building and his line of sight makes a 33.0° angle with the ground. After having moved 300 m, he looks at the top of the building again, and ...

Government
economic status.

Physict
This question is similar to some on driver's-license exams: A car moving at 50 km/h skids 15 m with locked brakes. Show that with locked brakes at 150 km/h the car will skid 135 m.

Physics
2. Boxcar A, with mass of 1500 kg, is travelling at 25 m/s to the east. Boxcar B has a mass of 2000 kg, and is initially at rest. The box cars collide inelastically and move together after they get stuck. What is their combined velocity?

Physics
1. Car A, with mass of 1250 kg, is travelling at 30 m/s to the east. Car B is a truck with mass of 2000 kg, travelling to the west at 25 m/s. Assume these two vehicles experience an inelastic collision but do not stick together, and Car A goes off 10 m/s to the west. What will...

Math
taxi company has 31 drivers and now has 43 how to find the percentage increase or decrease.

calculus area between three curves
also help with Find c>0 such that the area of the region enclosed by the parabolas y=x^2-c^2 and y=c^2-x^2 is 430.

calculus area between three curves
find the area of the region for 2y=4sqrt(x) , y=3, and 2y+3x=7

language arts
What would a flow map look like on the book The Hunger Games?

Math
(5x+1)/7-(2x-6)/4>_-4

Math
Y=2x^2 ;(1,2) ,(3,18)

Math
5x/7+1/7-2x/4-6/4

Math
5x/7+1/7-2x/4-6/4

Math
5x+1/7 -2x-6/4

logic
what is the truth value of the sentence "P v ~ P"

Physics
A roller-coaster car is moving at 20.0 m/s along a straight horizontal track. What is its speed after climbing a 15.0 m hill?

Chemistry
Solution A is 2.40M. 20mLs of solution A is transferred to a 250mL volumetric flask and diliuted to volume with water. What is the concentration of the diluted solution?

math
(4x^3+5x^2-2x-1)-(3x^2+7x-4)

Calculus II
x^2

Calculus II
x^2

math
What is (-2)^2 What is (-2)^3

algebra
*simplifying rational expressions a. 6x+12/4-x b. 3x^2/12-2x

algebra
traveling fromchicago to kansas city is a 540 mile trip. A small plane, facing a headwind (going against the wind), took 9 hours to get to kansas city. on the return trip to chicago the plane had a tailwind ( going with the wind) and the trip took only 6 hours. What was the ...

algebra
A 40 inch board is cut into two pieces so that the shorter piece is two-thirds of the length of the longer piece. What are the lengths of the two cut pieces?

algebra
A: 7x+7y=-77 B: 20x-5y=-35

Math
In a right triangle, the middle angle is 12 more than twice the smallest angle. What are the measures of the smallest and middle angles?

Math
76

math
jenny's company has two photocopying machines, one of which is older and slower than the other. In fact, the newer machine can put out four-thirds as many copies as the older machine in the same amount of time. If, while running at the same time, together they produce 560 ...

math
Roberto and Luisa Barron Lopez each work full time jobs, and Luisa's mother, Carmena, collects a monthly pension of $628. Between the three of them, their total household income is $4238 each month. If Luisa earns $1772, how much does Roberto earn each month?

math
on her first two math tests, Gracie has an average score of 86. If she got a score of 92 on the first test, what is her score on the second test?

Macro Eco
The belief that monetary policy can be effective in changing aggregate demand and that the money supply is the critical monetary variable is associated with: Answer a Modern Keynesians. b Monetarists. c Supply-side economists. d New classical economists.

Chemistry
In a coffee cup calorimeter, 50.00 mL of HNO3 (aq) and 50.00 mL of KOH(aq) were mixed. The temperature of the resultant solution increased 6.5 C. What is the Delta H of this reaction?

trig
What is cosx=1/2?

Statistics/Chi Square
I have a question to do in which the efficacy of a drug used to treat panic disorder is tested. Patients are given a placebo for one week and then the drug for one week, and the number of panic attacks is measured for each week. The data looks like this: Placebo Drug 0 0 2 1 0...

Statistics
For a math assignment we need to design a dice roll game with different expected values of winning. The game should require a player to make a bet on the sum of one roll of two dice. If the dice sum to that number, the player wins; otherwise, he loses. We need to create a fair...

Linear Algebra
Let W be the set of all polynomials p(t) in P3 such that p(0)=0. Show that W is a subsapce of P3 and find a basis.

world history
ebfliv

Math
A cafe holds 300 coffee mugs. 175 of those coffee mugs do not have handles. Estimate the percent of mugs that have handles.

SCIENCE
Craig sees a glass with ice tea sitting on the table. He notices that there is a great deal of moisture on the outside of the glass and a puddle of water on the table. He asks his family what they think causes the water to form on the outside of the glass. This is what they ...

Geometryy
given that sec theta = radical13/whole number 3, and csctheta<0 find sin theta using the 2different methods; 1)using the "x-y-r" definition 2) using identities only

Geometry
Use the special triangles to find the exact values of the following: 1) csc45degrees 2)sec30degrees 3)longest side of a 30-60-90 triangle if the side opposite the 60degree angle is 5radical3

Physics
17

Calculus AB
Let R be the region bounded by the graphs of y=sin(pi x) and y=(x^3)-4x, as shown in the figure above. (a) Find the area of R. (b) The horizontal line y=-2, x=2, x=-1. Write, but do not evaluate, an integral expression for the area.

Chemistry
What is the balanced equation of HClO4(aq)+Sr(OH)2(aq)

algebra
12x-6=9x

math/ measurment
What is the measure of the point angle for a star-shaped polygon with 8 points and a dent angle of 130 degrees? Is there a formula to figure this?

math/probability
I was on that line of thinking as well but there are four possible answers and that doesn't match any of them. The four possible answers are: A) 0.00000003 ; B) 0.1000 ; C) 0.00000025 ; and D) 0.00000028 I really want to understand how to work these problems but I am so lost.

math/probability
For some reason I can not get my head around probability. Please show me how to work the problem not just the answers. A class has 11 students who are to be assigned seating by lot. What is the probability that the students will be arranged in order from shortest to tallest? (...

Math / Probability
In a certian lottery, 4 differnt numbers between 1 and 11 inclusive are drawn. These are the winning numbers. A player selects 4 different numbers between 1 and 11. What is the probability that the player has all winning numbers?

math
find the volume of a tent having the shape of a rectangular solid of length 13 ft, width 12 ft, and heihght 8 ft topped by a rectangular pyramid of the same width and length with height 5 ft

math
how may polygon arrangments does a semi-regular tessellation have? a) exactly three, b) exactly two or three, c) exactly four, d) exactly two of four

Math
A standard deck of cards is made up of four suits with 13 cards in each suit (total of 52 cards). If we randomly sample five cards from a standard poker deck, find the probability that all five cards selected are clubs.

Math
Expected value = (20,000 x 0.7) - (3,000 x 0.3) 14,000 - 900 13100

chemistry
The answer is C).015 Find x through the quadratic equation x^2^ +(1.4E-3)x - (2.8E-5)=0

Business Law
Dale Emerson served as the chief financial officer for Reliant Electric Company, a distributor of electricity serving portions of Montana and North Dakota. Reliant was in the final stages of planning a takeover of Dakota Gasworks, Inc. a natural gas distributor that operated ...

Calculus
sed

chem
how do i write a balanced equation for the reaction for Calcium Carbide, CaC2, acetylene gas, C2H2, and calcium hydroxide, Ca(OH)2 are produced

chem
if you cann get 5candies for 7dollars, then how many candies will 33 dollars get you?

4th grade
65

His115
What political events and social viewpoints made a federal constitution and government essential?

spanish
*No, estoy cansado. *Donde esta la escuela? *Es muy romantico?

spanish 2
Mi musica favorita es hip hop. Or Mi musica favorita es el hip hop.

spanish 2
Because you are asking "Where are we?" and you would answer "We are". "We are" in spanish is Estamos.

English 3
I'm writing an essay comparing and contrasting two of Edgar Allan Poe's poems, "Annabel Lee" and "The Raven". I'll be comparing and contrasting the theme, rhyme scheme, irony and the use of figurative language. I have an idea of what I will be ...

math
What is the product of 65.5 ' 0.2?

critical thinking
This looks like hasty generlization

critical thinking
I know it is a statistical fallacy, and it represents a false causality, I just can't seem to pinpoint the specific fallacy.Thank you for your time and help. I appreciated it.

critical thinking
I am confused then, I originally thought it was an ad hominem...but then I moved to a smokescreen, but after reading a couple of inserts they did not make sense...I read the cite, and it (post hoc) defiantly does not fit. Maybe I am overanalyzing the definitions. When you say ...

critical thinking
Is it a proof surrogate(for rhetoric) and for fallacies is it a post hoc

critical thinking
I have 4 out of 50 questions left...I cannot figure out the last two rhetorical questions, or the last two fallacy questions. What type of rhetorical device are these? 1. Very little research has been done using properly matched groups with a control group, the gold standard ...

Biochem
Describe the one dehydration reaction in glycolysis. Include reactants, products, enzyme, and which step it is. I know that it is step 6 and I believe that the reaction uses glyceraldehyde-3-phosphate dehydrogenase to convert glyceraldehyde-3-phosphate into 1,3-...

physics
Air streams horizontally past a small airplane's wings such that the speed is 70.0m/s over the top surface and 60.0m/s past the bottom surface. If the plane has a wing area of 16.2m^2 on the top and on the bottom, what is the net vertical force that the air exerts on the ...

physics
sorry repeat. not needed

physics
a solid aluminum ingot weighs 89N in the air. what is its volume? (b) the ingot is suspended from a rope and totally immersed in water. What is the tension in the rope?

Physics
a solid aluminum ingot weighs 89N in the air. what is its volume? (b) the ingot is suspended from a rope and totally immersed in water. What is the tension in the rope?

science
since the plants and animals are flooded by the saltwater, the presence of so much salt would put them in a "hypertonic" environment, meaning that there is more solute present (in this case salt) than water. Plants and animals have to have a certain balance of salt ...

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