Tuesday

February 28, 2017
Total # Posts: 118

**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.

*February 3, 2017*

**calculus **

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

*January 25, 2017*

**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

*November 30, 2016*

**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.

*November 22, 2016*

**Math**

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

*August 29, 2016*

**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 ...

*May 11, 2016*

**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 ...

*April 26, 2016*

**Science**

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

*April 26, 2016*

**algebra**

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

*January 12, 2016*

**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?

*October 12, 2015*

**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...

*May 18, 2015*

**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 ...

*April 6, 2015*

**LA**

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

*January 23, 2015*

**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

*January 19, 2015*

**alegebra**

Totally lost.

*January 19, 2015*

**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

*January 19, 2015*

**English**

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

*November 28, 2014*

**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?

*November 23, 2014*

**Trig**

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

*October 28, 2014*

**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 ...

*August 9, 2014*

**Government**

economic status.

*May 2, 2014*

**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.

*April 8, 2014*

**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?

*April 8, 2014*

**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...

*April 8, 2014*

**Math**

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

*March 5, 2014*

**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.

*December 2, 2013*

**calculus area between three curves**

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

*December 2, 2013*

**language arts**

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

*September 22, 2013*

**Math**

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

*September 15, 2013*

**Math**

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

*September 15, 2013*

**Math**

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

*September 15, 2013*

**Math**

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

*September 12, 2013*

**Math**

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

*September 11, 2013*

**logic**

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

*June 26, 2013*

**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?

*May 5, 2013*

**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?

*April 25, 2013*

**math**

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

*January 24, 2013*

**Calculus II**

x^2

*December 30, 2012*

**Calculus II**

x^2

*December 30, 2012*

**math**

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

*December 12, 2012*

**algebra**

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

*November 13, 2012*

**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 ...

*October 28, 2012*

**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?

*October 28, 2012*

**algebra**

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

*October 28, 2012*

**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?

*October 9, 2012*

**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 ...

*October 1, 2012*

**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?

*October 1, 2012*

**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?

*September 29, 2012*

**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.

*April 26, 2012*

**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?

*April 8, 2012*

**trig**

What is cosx=1/2?

*March 22, 2012*

**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...

*February 29, 2012*

**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...

*February 1, 2012*

**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.

*November 19, 2011*

**world history**

ebfliv

*November 15, 2011*

**Math**

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

*October 30, 2011*

**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 ...

*October 20, 2011*

**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

*September 2, 2011*

**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

*September 2, 2011*

**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.

*March 11, 2011*

**Chemistry**

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

*December 21, 2010*

**algebra**

12x-6=9x

*September 9, 2010*

**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?

*July 24, 2010*

**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.

*July 24, 2010*

**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? (...

*July 24, 2010*

**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?

*July 24, 2010*

**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

*July 2, 2010*

**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

*July 2, 2010*

**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.

*June 21, 2010*

**Math**

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

*June 21, 2010*

**chemistry**

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

*May 13, 2010*

**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 ...

*April 27, 2010*

**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

*April 13, 2010*

**chem**

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

*February 10, 2010*

**His115**

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

*December 2, 2009*

**spanish**

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

*September 23, 2009*

**spanish 2**

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

*September 23, 2009*

**spanish 2**

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

*September 23, 2009*

**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 ...

*August 18, 2009*

**math**

What is the product of 65.5 ' 0.2?

*August 2, 2009*

**critical thinking**

This looks like hasty generlization

*May 31, 2009*

**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.

*May 31, 2009*

**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 ...

*May 31, 2009*

**critical thinking**

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

*May 31, 2009*

**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 ...

*May 31, 2009*

**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-...

*April 6, 2009*

**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 ...

*January 29, 2009*

**physics**

sorry repeat. not needed

*January 27, 2009*

**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?

*January 27, 2009*

**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?

*January 27, 2009*

**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 ...

*January 20, 2009*

**Physics**

For the radius it is supposed to be r^2. Would I use 10.0cm^2 or 5cm^2? and would I convert that value to meters? Also where did the 1.41s come from? Thank you

*January 20, 2009*

**Physics**

Four identical masses of 800kg each are placed at the corners of a square whose side length is 10.0cm. What is the net gravitational force (magnitude and direction) on one of the masses, due to the other three? I think I have to separate the four masses but I'm not sure ...

*January 20, 2009*

**Physics**

In a Cavendish balance apparatus suppose that M1= 1.10Kg, M2= 25.0Kg, and the rod connecting the M1 pairs is 30.0cm long. If, in each pair, M1 and M2 are 12.0cm apart center-to-center, find (a) the net force and (b) the net torque (about the rotation axis) on the rotating part...

*January 19, 2009*

**Statistics**

X = 7 and SX2 = 21. A new variable Y is created by multiplying each X by 3. What are SY and SY2 equal to ? I do not understand.

*January 17, 2009*

**Chemistry**

How do you convert umol/m3 to umol/m2?

*October 28, 2008*