Wednesday

October 7, 2015
Total # Posts: 1,609

**Calculus**

A mass on a spring vibrates horizontally on a smooth level surface (see the figure). Its equation of motion is x(t) = 8 sin t, where t is in seconds and x is in centimeters. The first part of the question is to find the velocity and acceleration equations, which I got to be: v...
*October 6, 2015*

**Intro to Undergraduate Studies**

Does the sentences below need to be cited? Why or why not? Bill Gates is the founder of Microsoft. Students who studied two hours a day did 25% better in the final exam.
*October 6, 2015*

**Calculus**

The equation of motion of a particle is s = t3 − 12t, where s is in meters and t is in seconds. For the velocity function, I got v(t)=3t^2-12 and for acceleration, a(t)=6t. The final question is: Find the acceleration when the velocity is 0. How do I do that?
*September 29, 2015*

**Calculus**

Find the limit as x approaches infinity. sqrt(81x^2 + x)− 9x. I've worked this two different ways and have gotten 0 and 1/9, neither of which is the right answer according to the homework system??
*September 14, 2015*

**Calculus**

I misread the question!! I was thinking that setting it equal to 0 would be something completely different. Thank you so much!
*September 14, 2015*

**Calculus**

If a rock is thrown upward on the planet Mars with a velocity of 19 m/s, its height (in meters) after t seconds is given by H = 19t − 1.86t^2. When will the rock hit the surface?
*September 14, 2015*

**Algebra**

Find the domain of the function. (Write your answer using interval notation.) sqrt(x)/ (4x^2 + 3x − 1) If you set the bottom equal to zero, I got that x can't be -1 or 1/4. But I'm not sure if that's right, or how to write the answer in interval notation.
*September 12, 2015*

**Algebra**

Find the domain of the function. Write in interval notation. sqrt(x^2 − 64). For the answer, I got (-infinity, -8)u(8, infinity), but that's wrong, and I'm not sure what else to try?
*September 12, 2015*

**Calculus**

If a ball is thrown into the air with a velocity of 34 ft/s, its height (in feet) after t seconds is given by y = 34t − 16t^2. Find the velocity when t = 1.
*September 10, 2015*

**Calculus**

If a ball is thrown into the air with a velocity of 40 ft/s, its height in feet t seconds later is given by y = 40t − 16t^2. Find the average velocity for the time period beginning when t = 2 and lasting for each of the following. 1) 0.5 seconds.
*September 9, 2015*

**Calculus (limits)**

The question is to "state the value of each quantity, if it exists." We are given a piecewise function that is graphed, and no equation. What does it mean when we're asked to find f(2)?
*September 3, 2015*

**Math**

A rock is thrown upward with a velocity of 12 meters per sec from the top of a 25 meter high cliff and it misses on it's way back down. When will the rock be 3 meters from water
*September 1, 2015*

**Algebra-domain**

I had to find the domain of a function, and my answer is that x is all real numbers except -5 and 6. How do I write that in interval notation?
*August 31, 2015*

**math**

Factor the expression: x^3-4x^2-4x+16. I ended up getting x^3-4(x^2+x-4), but can I take it farther than that?
*August 31, 2015*

**Algebra**

I have another one What is the value of 42-2(3x5+1)? I thought you worked the parentheses first which would be 16, then subtract 42 from 2 and you get 39, you would then multiply 16x39 and you would get 624. But the answers I have to choose from are 8, 1, -16 and -21. What am ...
*August 26, 2015*

**Algebra**

Which equation represents "fifteen more than r is sixty-one? a. r + 61 = 15 b. r + 15 = 61 c. r - 15 = 61 d. r + 61 = 15 I think its b or c because b is 46 and c is 76
*August 26, 2015*

**Geometry**

Help! I don't understand this problem Find the angle of rotation that maps point P (1,0) on to P'. What are the x and y coordinates of point P' to the nearest thousandths? Determine a translation rule that maps point P onto P'.
*August 22, 2015*

**Language Arts**

What is the most important element of the plot of Lord of the Rings? a) the elves sailing away on ships b) Galadriel's gifts of magic c) the journey to destroy the ring or d) the journey to Rivendell. I think it is C) the journey to destroy the ring.
*August 18, 2015*

**physics**

500n and 100n
*July 7, 2015*

**Finance**

If a firm buys on trade credit terms of 3/10, net 50 and decides to forgo the trade credit discount and pay on the net day, what is annualized cost of forgoing the discount (assume a 360-day year)? The annualized cost of the trade credit terms of 3/10, net 50 is ___%
*June 15, 2015*

**math**

**Problem 3: Create a linear function (y=mx+b) and graph the line for the following set of data. x | y 2 | 1 4 | 2 6 | 3 First, use the slope formula to find slope: (y2-y1)/(x2-x1) Then, put the slope (m), a 'y' point, and matching 'x' point into the formula y=...
*May 15, 2015*

**English**

Where does the comma go in these sentences? 1. Usually castles sat on a hilltop, and had high stone walls. 2. Loo at this picture of a castle Cate.
*April 19, 2015*

**Redox Reaction**

In an acidic solution, manganese(II) ion is oxidized to permanganate ion by bismuthate ion, BiO3-. In the reaction, BiO3- is reduced to Bi3+. How many milligrams of NaBiO3 are needed to oxidize the manganese in 30.2 mg of manganese(II) sulfate?
*April 19, 2015*

**Stream Physics Hydrology - HELP!!!!**

1a) An aqueous solution containing 35 kg of endosuflan insecticide is accidentally released into a small stream. The stream dimensions are 17.5 meters wide and 1.15 meters deep. The stream velocity is 1.1 m/s. The stream channel drops 24m over a distance of 10 km. Endosuflan ...
*April 17, 2015*

**Science**

Which chemical equation shows that no atoms are lost during a chemical reaction? A. 8Fe+s8-->Fe5 B. 8Fe+8S8--> 8FeS C. Fe+8S8--->FeS D. 8Fe+S8--->8FeS Is the answer A?
*April 16, 2015*

**Math**

Alicia has a flat platter shaped like a square with a semicircle of diameter 10 inches on each edge, as pictured. What is the number of inches in the side length of the smallest square ABCD that can contain the platter? I drew a diagram so far, but I don't know what to do ...
*March 22, 2015*

**Chemistry **

What is the concentration of arsenate ions in 3.5 M solution of arsenic acid? The acid-dissociation constants of H3AsO4 are: Ka1 = 5.0 x 10-3 Ka2 = 9.3 x 10-8 Ka3 = 3.0 x 10-12 I can't figure out how to set up the question
*March 18, 2015*

**marketing research and method**

Topic: Measure the various factors that influence consumption of fast food among uni. students
*March 16, 2015*

**periodic functions(math)**

A vessel is crossing a channel. The depth of the water(measured in metres) varies with time and is represented by the following equation: d(t)=2.5sin(0.523t)+2.9 a. create a graph showing the depth of the water over 24 hours. b. what is the period of this function and what ...
*March 12, 2015*

**Spanish 1**

I am not really understanding how to do some of these. Need some guidance. Thanks!! Los verbos que terminan en -car, -gar y -zar What is special about the following verbs? Complete each of the sentences with the correct preterit form of the logical verb from the word bank. ...
*March 11, 2015*

**math**

The probability that Ryan chooses Spanish is 0.86 and the probability that Riley chooses Spanish is 0.73. State the probability that: a. they both chose Spanish b neither of them choose Spanish c. only one of them chooses Spanish d. at least one of them chooses Spanish
*March 9, 2015*

**math**

A boat is travelling south at a rate of 18 km/h. A man walks across the deck from east to west at a rate of 16 km/h. Find the magnitude and direction of his velocity.
*March 9, 2015*

**Math**

A ship leaves port and sails northwest for 2 hours, and then sails N35degreesE for three hours. If it does not change speed, what direction must the ship sail to return directly to port? How long will this return trip take?
*March 9, 2015*

**Physical science**

i push a 500n box up an inclined plane that is 4 m long and 1.2 m high. what force is applied to push the box up the ramp?
*March 4, 2015*

**Biochemistry**

Suppose that a mutant enzyme binds a substrate 100 times as tightly as does the native enzyme. What is the effect of this mutation on catalytic rate if the binding of the transition state is unaffected?
*February 13, 2015*

**science**

A marathon race is 26.22 miles. How many kilometers do the runners run?
*February 9, 2015*

**trig**

From post C, An airplane and a helicopter travel to different islands.The plane travels.415 km N 60degrees45minutes E to island A. and the helicopter travels to island B at S 19degrees5minutes E for 120 km. what is the distance between tthe two island
*February 9, 2015*

**Math**

Hi! My teacher told my class that the answer to this question is "1-sin x/cosx" but she wants us to figure out why. I tried solving it but I didn't end up with the answer given. Can someone help me? Thank you! Problem: cos x/1+sinx
*February 8, 2015*

**Math**

How would you solve this problem? cos x/1+sinx
*February 7, 2015*

**Physics**

A watermelon seed has the following coordinates: x = -8.7 m, y = 1.6 m, and z = 0 m. Find its position vector as (a) a magnitude and (b) an angle relative to the positive direction of the x axis. If the seed is moved to the xyz coordinates ( 3.4 m, 0 m, 0 m), what is its ...
*February 2, 2015*

**English**

8 Sentences, packed with descriptions, details, and examples. A verbal video of your room. i am trying to write about my daughters room. need help. my daughters room has a wide closet filled with clothes. frozen pink carpet in front of her white bed. medium oak brown wooded ...
*February 1, 2015*

**physics**

An athlete performing a long jump leaves the ground at a 27.1∘ angle and lands 7.72m away 1.What was the takeoff speed? 2.If this speed were increased by just 5.0%, how much longer would the jump be?
*January 31, 2015*

**physics- vectors **

In the sum Vector A plus Vector B equals vector C, vector A has a magnitude of 11.6 m and is angled 36.5° counterclockwise from the +x direction, and vector C has a magnitude of 14.0 m and is angled 17.1° counterclockwise from the -x direction. What are (a) the ...
*January 27, 2015*

**art**

What are the really answers
*January 23, 2015*

**Physics**

A dog running in an open field has components of velocity vx = 3.0m/s and vy = -1.1m/s at time t1 = 11.7s . For the time interval from t1 = 11.7s to t2 = 22.2s , the average acceleration of the dog has magnitude 0.55m/s2 and direction 34.5∘ measured from the +x−...
*January 22, 2015*

**6th Grade Math**

My son has to solve equations with mixed numbers in them. we are in dispute about the problem below: 6 3/8 = t - 4 3/4 - 2 1/16 I solved it by adding 2 1/16 to both sides, then adding 4 3/4 to both sides. My answer was 13. My son solved it by subtracting he mixed numbers on ...
*January 21, 2015*

**Math**

A 13.5 gallon tank is 4/5 full. How many gallons will it take to fill the tank?
*January 11, 2015*

**English**

NEVERMIND. What I mean by giving examples is I have to explain what he means by each of 1 a kind of measles of the spirit, 2 a mumps of the psyche, 3 a disfiguring chicken pox of the soul. I KNOW THAT THEY ARE ALLLL personification. ah thank you.. I can tell that you are ...
*January 3, 2015*

**English**

Because I didnt want to give examples for all three lines. I can do that however. and RHYTHM & RHYME, see i dont know..?
*January 3, 2015*

**English**

*then I have to
*January 3, 2015*

**English**

For personification I used "a kind of measles of the spirit" For metaphor I used "But now when I fall upon the sidewalks of life, I skin my knees" Then I explained them, now I just need one more and the I have to explain how he used the figurative language ...
*January 3, 2015*

**English**

The whole idea of it makes me feel like I'm coming down with something, something worse than any stomach ache or the headaches I get from reading in bad light-- a kind of measles of the spirit, a mumps of the psyche, a disfiguring chicken pox of the soul. You tell me it is...
*January 3, 2015*

**CAL**

Consider the function y = 3x5 – 25x3 + 60x + 1. Find the absolute maximum value of y on the interval [0, 3]. What do you get I got -322, but I'm not 100% on how to find the absolute maximum.. so is that right?
*December 9, 2014*

**marketing**

1.Which option did you choose for Our Town Photography? What rationale did you use to select the option you chose? I went with the second option Joe's proposal
*December 8, 2014*

**Business Mathmatics **

Fandango Furniture Manufacturing, Inc., has 40 employees on the assembly line, each with gross earnings of $325 per week. a. What are the total social security and Medicare taxes that should be withheld from the employees' paychecks each week? Social security: $806 ...
*December 7, 2014*

**English**

Astronauts are learned, taught to survive in space. I think learned? ?
*December 4, 2014*

**physics**

A 0.59 kg rubber ball has a speed of 1.50 m/s at point A and kinetic energy of 7.0 J at point B. (a) Determine the ball's kinetic energy at A Correct: Your answer is correct. J (b) Determine the ball's speed at B
*December 3, 2014*

**physics**

A 58.0 kg pole vaulter running at 8.9 m/s vaults over the bar. If the vaulter's horizontal component of velocity over the bar is 1.0 m/s and air resistance is disregarded, how high was the jump?
*December 3, 2014*

**Chemistry**

Given cell Cd | CdCl2 (0.55M) || NaBrO3 (0.34M), NaBr (0.12M), pH=1.20 | Pt 1. How many electrons are transferred? 2. What is E° for the cell? 3. What is E for the cell?
*December 2, 2014*

**physics**

A simple harmonic oscillator consists of a block of mass 1.20 kg attached to a spring of spring constant 190 N/m. When t = 1.80 s, the position and velocity of the block are x = 0.124 m and v = 3.190 m/s. (a) What is the amplitude of the oscillations? What were the (b) ...
*November 30, 2014*

**Microsoft Excel**

The order of precedence is very important when building formulas in Excel. Which of the following formulas will produce 778 as the result? A. =(25*(27/9)+5+309)*2 B.=25*((27/9+5)+309*2) C.=25*(27/9+5)+309*2 D. =25*27/9+5+309*2 Even understanding the basics of Excel was ...
*November 26, 2014*

**Biology*STUCK* **

A group of students was asked to list some of the similarities and differences between prokaryotic cells and eukaryotic cells. They created the table shown above. The students made a mistake in creating their table. Which statement best describes their mistake? a) Both ...
*November 20, 2014*

**Chemistry**

A beaker contains a solution that is 0.50 M in Au+3 ion and 0.25 M in Ag+ ion. A soultion of sodium chloride is slowly dripped into the beaker with stirring. Which ion will precipitate first, the gold or the silver? Clearly support your answer and write out your final ...
*November 19, 2014*

**English**

I did read it all, I don't understand it... I was gone to say B but yeah just don't understand.
*November 18, 2014*

**English**

Writers often use language and images to foreshadow events that are going to take place in a story. Consider these words and phrases from the passage: dank tropical night moonless Caribbean night moist black velvet From these the reader can predict that Whitney and/or ...
*November 18, 2014*

**Math**

What is an interquartile range? What is a mean absolute deviation?
*November 14, 2014*

**Chemistry**

20.0 ml of 1.00 M formic acid are combined with 10.0 ml of 1.00 M sodium formate. Calculate the expected pH. Ka for formic acid is 1.77 x 10^-4
*November 13, 2014*

**English**

In the sentence what did you have for dinner? Is have a linking verb? Is the word what an adverb, a direct object, or an indirect object?
*November 12, 2014*

**math**

what is the better buy one pack of aaa batteries for $5.49 and get a pack free or buy two packs for $2.9.
*November 11, 2014*

**Science**

List these from broadest to specific Organism Ecosystem Population Community Where would ecosystem fall Population, community, organism
*November 10, 2014*

**Check my physics answer**

When should you express a vector along the x-axis as a negative vector? when its magnitude is less than 1 when the arrow representing the vector would point toward negative x when the arrow representing the vector would point toward positive x when its magnitude is greater ...
*November 9, 2014*

**Chemistry**

You are given 21.0 mL of a 5.00% solution of NaOH. The solution has a density of 1.02 g/mL. What volume of 0.0895M H2SO4 will you need to completely and exactly react (neutralize) the NaOH?
*October 22, 2014*

**art**

to evaluate the success of this image you would do all of following except
*October 20, 2014*

**art**

what should the artist do first in order to draw this two point perspective image
*October 20, 2014*

**physics**

Five identical resistors, each of resistance R, are connected in series to a battery, and a total current of 9.74 A flows in the circuit. i. Now, another resistor of resistance R is added to the circuit, in series with the rest of the resistors. Find the new total current in ...
*October 8, 2014*

**physics**

Five identical resistors, each of resistance R, are connected in series to a battery, and a total current of 9.74 A flows in the circuit. i. Now, another resistor of resistance R is added to the circuit, in series with the rest of the resistors. Find the new total current in ...
*October 8, 2014*

**Earth Science**

Unlike most road maps, topographic maps can be used to find 1: the best route to a town 20 km away. 2: the temperature at any place on the map 3:the elevation above sea level. 4:the distance between two locations
*October 7, 2014*

**Math**

Julie is conducting an experiment where she placed 29.5 mL of water in a calorimeter at 15.0 °C. Then, 2.4 g of A (molar mass = 48.0 g/mol), also at 15.0°C, is added to the water in the calorimeter and the temperature of the solution increases to 28.0 °C. The ...
*October 5, 2014*

**Math**

For the function h(x) = 2cot(x/2) an expression for the value of all asymptotes is ________?
*October 3, 2014*

**Math**

The rotating light on a lighthouse is 400 feet from a cliff. It completes one rotation every 10 seconds. The equation representing the distance, d, in feet that the center of the circle of light is from the lighthouse is d(t) = 400sec (πt/5). What is the period of d(t)? (...
*October 3, 2014*

**English**

So singular
*September 29, 2014*

**English**

Every insect's behavior is instinctive; it knows how to act and what to do from the moment it is born. Is insect's singular or plural and why?
*September 29, 2014*

**Physics**

Find the pressure exerted by a waterbed with dimensions of 2 m x 2 m which is 30 cm thick. (hint: use density of water)
*September 22, 2014*

**math**

Find the pressure exerted by a waterbed with dimensions of 2 m x 2 m which is 30 cm thick. (hint: use density of water)
*September 22, 2014*

**MATH word prob!**

Together a baseball and a football weigh 2.25 pounds, the baseball and a soccer ball weigh 1.25 pounds, and the football and the soccer ball weigh 2.50 pounds. How much does each of the balls weigh?
*September 9, 2014*

**English**

so what exactly are biases?
*September 8, 2014*

**English**

If you are a non-smoker what are some biases you can have towards a smoker?
*September 8, 2014*

**MATH HELP**

thanks!!!
*September 8, 2014*

**MATH HELP**

a warehouse has 46 truckloads of recycled plastic. they use 8 truckloads each day. when there are a fewer than 16 truckloads, more needs to be ordered. figure out how many truckloads will be left after 2 days.. after 3 days when will more need to be ordered?
*September 8, 2014*

**English**

In the sentence In the past keepers operated all lighthouses. Is lighthouses the direct object? In this sentence Now, lighthouses are beacons run by computers. Is beacons neither a direct object or an indirect object?
*September 4, 2014*

**Spanish**

Can you say Como Le va to mean what's going on with you the formal way?
*September 1, 2014*

**math confused**

it took marty 42 min to write a book report. then he spent 18 min correcting this report. explain how can you use mental math to find how long marty spent on his report?
*August 22, 2014*

**Business law**

Benner imports Inc, an automobile dealership, placed an advertisemet in the chicago sun times to sell a station wagon. The advertisement displayed a price that was $700 lower than the dealership had indicated in the advertising copy sent to the newspaper. A customer wanted to ...
*August 14, 2014*

**Question**

thank you.
*August 11, 2014*

**Question**

yeah I understand that's why I was so confused because it just says write one page out, and since its not an exact proposal letter, its a proposal in a journal entry, I tried making it short and simple, to fit into the journal. In my goals I explained how to promote ...
*August 11, 2014*

**Question**

I also added facts in there too, not opinions. I gave exact organization names, laws, percentages of how many people were injured and killed each year, etc.
*August 11, 2014*

**Question**

Ok so I written out a page with my organizations name, what we aim to accomplish, the facts of distracted driving, what we can do as a community to prevent it, and the solution which was to help people understand the dangers of the cognitive distraction to the brain, to ...
*August 11, 2014*

**Question**

ok so i should take out the state the facts and put the facts in the objective?
*August 11, 2014*

**Question**

Ok so I start off and put at the top the objective, then next I put the facts, then next I put the goals, and lastly the solution. And I set it up like this: The objective: blah blah blah The facts: blah blah blah
*August 11, 2014*

**Question**

how do you write a proposal? I am working on a journal entry, and it says to write a proposal in your journal for a volunteer service project that you would like to create to address the problem of your choice such as a problem in my community, which I chose distracted driving.
*August 11, 2014*