Jacob

This page lists questions and answers that were posted by visitors named Jacob.

Questions

The following questions were asked by visitors named Jacob.

If a base is added to water, the pH will increase, decrease, stay the same, or increase sometimes and decrease sometimes. I have asked several friends and the two answers I get is increase from 3 of them and stay the same from 2 of them. I am confused. An...

I'm not sure how to calculate limits from graphs. I've tried many times but I can't figure it out. Are there any sites or tips you can give me? Thank you very much, I really appreciate it.

My teacher showed our class how to find the graph of a derivative using tangent lines. I can not figure this out. I would really appreciate it if someone could help me or explain it to me. Thank you very much for your help.

One student says you can only use the mode to describe categorical data, but you can use the mode, median, and mean to describe numerical data. Is the student correct? Why?

A rectangle has a width if 10 inches and an area of 5 square inches. What is the length of the rectangle?

what is: 9,436 x 7 ------

How do you find the median?

What are some phrases similar to "Case in point"? Thank you very much.

what is a number that divied by 3 has a remainder of 2 also that smae number divided by 4 has a remainder 3 and that same number divided by 5 has a remainder of 4

What would be the uncertainty in velocity (miles/hr) of a neutron beam particle if the position can be measured within +/- 25 angstroms. The rest mass of a neutron = 1.67493 X 10^-27 kg or 1.008664904(14) amu. I know you have to use the heisenberg uncerta...

What are some examples of the principles of mechanics in car crashes and car safety? I can only think of one, friction reducing the traction of the tires. Can you help me come up with two or three more examples? Thank you.

Can you please help me rephrase this? I have completed over 150 volunteer hours at {name} Hospital. Delivering and filing medical transcriptions is one of my favorite jobs. Through this work, I was able to explore every part of the hospital while having t...

Am I missing any important punctuation in this sentence: Scientists and doctors alike have only come up with one sound conclusion to date: based on what they’ve seen yet, the Ram is a creature which will no doubt affect the environment it lives in greatly...

A student throws a ball vertically upward such that it travels 9.0 m to its maximum height. If the ball is caught at the initial height 2.4s after being thrown, what is the ball's average speed? I know average speed is change in distance over change in ti...

sammy goes out to play. his mother tells him to be home by 5:00. Sammy is almost an hour late, but he has an excuse. He says that he got lost. He tells his mother that when he checked his compass, it was pointing west,so he followed a path in that directi...

Wha are the roots of x to the second power divided by x minus six equals Zero?

A jet leaves the airport traveling at an average rate of 564km/h. Another jet leaves the same airport traveling at a rate of 744km/h in the same direction. How long will it take for the second jet to reach the first jet

How much iron (II) sulfide would be needed to prepare 15L of hydrogen sulfide? My balanced equation is 2HCl + FeS --> H2S + FeCl2. I have converted 15L H2S to mols, but I have no idea where to go from here.

What is a maerial that was recently alive?

If a triangle has angles 35 and 65 degrees, what is the measurment of the third angle? Is it a right triangle?

Find all angles of a right triangle RST given that r = 18cm and s=20 cm

Name a tool that you can use to measure the circumference of an object.

Name a tool that you can use to measure the volume of an object.

What are improper factors? How do we find improper factors for any given numbers?

Find the equation of the straight line joining a)(4, 4) and ( 2, 0) b)(3, -1), (5, 4) i also need to know how you went about solving this problem so i can understand.. many thanks

Caused the isrealites to leave Canaan and go to egypt

Jasmine's quarters total $2.80 more than her nickels, of which she has half as many as she has dimes, which total 80 cents more than her quarters.

were solving absolute value equations \can you help me out in 1 8-|3x-2|=3 i don't know if we distribute the negative or make it into -1 or its a no value something like that theirs no possible answer

how could you identify a pure metal if you have a balance, a graduated cylinder and a table of densities for metals?

For my final exam I must build a paper tower that stands at least 60+ inches. These are what I can use. -One sheet of paper (8.5x11) -Two feet of tape -Pencil -Ruler I can't seem to find the correct way to do this anywhere on the internet, so can I get so...

How do I evaluate log base 8 of 4?

If x is a natural number, then (x +4)^2 =x +16

If x is a natural number then,(x+5)/5=x+1

A 69 kg roller blader, is on a frictionless surface at rest, he then tosses a 4.0 kg rock that has a velocity given by v=3i+4jm/s, the axes are both in the horizontal plane. Find the x component and y component of the subsequent velocity of the roller bla...

Find the force on a hollow dome that is 1000 feet in diameter, that is a mile below the surface. HOw large can the dome be expanded and not surpass 600 billion pounds. I know the height will be 500, and i think that the intergral is 5280 to 4780 int 64,00...

Two rollerbladers throw a frisbie back and forth on a frictionless surface. Which does not change? a. Momentum of an individual rollerblader b. Momentum of the frisbie c. Momentum of the system consisting of the frisbie and rollerbladers throwing the ball...

Two trucks approach at the same speed and undergo an inelastic collision. Their total momentum? a. becomes zero b. remains unchanged c. doubles d. I need to know the masses of the two cars I say B.

Object A crashes into object B. A is more massive than B. Which is a true statement? a. A experiences an impulse b. B experiences an impulse c. Both A and B experience an impulse of equal magnitude d. Both A and B experience an impulse, but the impulse on...

A 150g fircracker is thrown at 66km/h . It explodes in the air into two pieces, with a 42g piece continuing ahead at 93km/h.How much energy is gained in the explosion by the two pieces. I know you use k=1/2mv^2 though, do you use m1v1+m2v2=(m1+m2)vf I am...

A 32-u oxygen molecule (O2) moving in the +x direction at 580 m/s collides with an oxygen atom (mass 16 u) moving at 870 m/s at 27 degrees to the x axis. The particles stick together to form an ozone molecule. Find the velocity of the ozone. Express your...

Find a number X such that the error is less than X (The error is 14593/2340 for the sequence, 7n/(n^3+1). How would you start to solve this problem?

In the story Alexander Who Used To Be Rich Last Sunday what did Nicky tell him to do with his dollar?

Hi, i have to right a research paper about the origins and history of a cancer. I do not know where to find this information. We can choose any type of cancer, but i do not know where to find this information(who first diagnosed it, when was it first diag...

Name one land and ocean animal that migrate.

Nikki lives near the deepest ocean trench in the world.What country does she live in .

Im a Danish student, and I've written this summary which I would like someone to correct. Thanks in advance! In the short story”Beyond the pale”, published in 1888, author Rudyard Kipling states via his narrator that one should stick to its caste. Trejago...

Determine the mass of 3.16 ×1023 atoms Cl. Answer in units of g. How do you do this? Need to get it done really fast. Thanks for help.

The three smallest bones in the human body are located in the middle ear. What are they called?

How many stars form the bowl of the Big Dipper and What part of a carrot plant could be considered a wedge?

I hate to read and I did not read the book THe Guns of Navarone. I have to answer one question for four categories; Comprehension, Extending Understanding, Text Analysis, and Context Analysis. Help?

Which one of the following is NOT a Lewis acid-base reaction? 1. ) Ca + S --> Ca2+ + S2- 2. ) BeF2 + 2 F- --> BeF42- 3. ) H+ + -O-H --> H-O-H 4. ) NH3 + BF3 --> H3N-BF3 i thought it was 1...but im not sure...but i know that 3 & 4 are definatly right.

Is it true that when you put together unequal groups, you can only add/

The following forces act on a hockey puck (round, rubber disk) sitting on a frictionless surface: F_1 = 12 N at 15 degrees; F_2 = 28 N at 125 degrees; and F_3 = 33.3 N at 235 degrees. All the forces are in the plane of the ice. Determine the net force on...

Two mountains are 1.00 km apart. If their masses are identical (2.00 × 1010 kg), what is the force due to gravity between the mountains? Fg=(GMm)/ r^2 =(6.67x10^-11 N*m^2/kg^2)(1010kg) (1010kg)/ (1000m)^2 =6.80x10^-11 N But the possible answers are: 2.67x...

triangle with side lengths 172m, 155m, and 155m. calculate the area.

We are proof reading phrases for errors. aunt rose, one of my favorite aunts This is my corrected phrase: Aunt Rose, one of my favorite aunts

The heat of reaction for burning 1 mole of a certain compound X is known to be -477.7 kJ. The calorimeter constant of the bomb being used is 2500 j/degree celsius and the initial temperature of the water is 23.2 degrees celsius. a) if 22.54 g of compound...

looking for help with find the slope and the y intercept for y = 5 please help

Which of the following are strong electrolytes? BaCl2 AgNO3 PbI2 Pb(NO3)2 KI I think they are all strong electrolytes. Is this correct?

For each of the following water-soluble compounds, indicate the ions present in an aqueous solution: NaI K2SO4 NaCN Ba(OH)2 (NH4)2SO4 would the answer to NaI be Na+ I-? Should there be more to my answer? Would K2SO4 be K+ SO-? Thanks for the explanation.

Sucrose, C12H22O11, is burned to produce carbon dioxide and water. What is the balanced formula and reaction type?

Hey I need some help with this problem. Any ideas on how to solve it? Thanks lots. : A hardware supplier manufactures three kinds of clamps, types A, B and C. Production restrictions require them to make 10 units more type C clamps than the total of the o...

What did the 100 year war do the economy?

Who was the 100 year war between? I honestly have no idea.

Who was the 21 president?

What events led up to the Civil War? A State's Rights B Slavery C All of the above

How do you draw a net duagram for a group of cubes???!!!

A 1.50 M solution containing 25 Grams of Al(OH)3 would occupy what volume in liters?

A physics student of mass mm = 100 kg gets a summer job painting houses. On his first project, he builds a platform using large pine board with a mass of mb = 60 kg The board has an overall length of L = 8.5 meters and set on two 1 meter tall saw horses s...

A student throws a 9 gram of gum is thrown across the physics lab from a distance of 2.5 m. When the gum has a horizontal velocity of vo it connects with a mass on the end of 1.62 kg simple pendulum which is initially at rest. The pendulum has a length of...

A student gets a 2.9 kg mass to oscillate up and down on bottom of a light vertical spring by pulling her hand up and down on the top end of the spring. The spring is a real spring with a spring constant of 93 N/m and a damping constant of 0.7 N sec/m. (a...

A box is pulled across a horizontal surface at a constant speed by a horizontal rope with tension T=30N. The coefficient of friction between the box and surface is uk = 0.05. 1. Calculate the work done by friction as the box moves 4 meters to the right. i...

Wong is standing on a turntable in class holding a weight in each hand a distance .75 meters from the center of his body. He is originally rotating with an angular frequency w=0.3 rad/s. He pulls the weights in so they are only .25 meters from the axis of...

A uniform thin sheet of metal is cut in the shape of a semicircle of radius R and lies in the xy plane with its center at the origin and diameter lying along the x axis. Find the position of the Center of Mass using polar coordinates.

What is the area and perimeter of a quadrilateral that has a width of 4m and length of 14m

does a raw score less than the mean correspond to a positive or negative score? what about a raw score greater than the mean.

What are the values of the mean and standard deviation of a normal standard deviation

fawnsbetween one and five months old have a approx body weight of u=27.2 kilograms and a standard deviation of o= 4.3 kilograms let x be the the weight of the fawn in kilograms convert the following x intervals to z intervals. x=<30 19<x 32<z<35

how to sketch the areas under the standard normal curveover the indicated intervals and find the specified areas to the left z=0 to the left z=-0.47 to the left of z=0.45

A football team’s coach predicts that his team will win 9 out of 10, or 90%, of its games. Which method did he most likely use to make this prediction my answer to this is relative frequency is this correct equally likely outcomes intuition law of large n...

How many sequences contain exactly three heads when you flip a coin five times? 2 15 10 8 12 my answer was 15 ,but that was incorrect

Richard has been given a 5-question multiple-choice quiz in his history class. Each question has four answers, of which only one is correct. Since Richard has not attended the class recently, he does not know any of the answers. The success occurs if Rich...

Which of the following can be classified as Discrete and Quantitative data. The acceleration of your car as you drive to school. my answer was number of neighbors still unsure of this though The different colors of the eyes of your classmates. The number...

In a random sample of 508 judges, it was found that 281 were introverts. Let p represent the proportion of all judges who are introverts. Find a point estimate for p. Round your answer to four decimal places. I am needing assitance in trying to figure out...

Suppose a certain species bird has an average weight ofx=3.55 grams. Based on previous studies, we can assume that the weights of these birds have a normal distribution with 0=0.37 grams. For a small group of 15 birds, find the margin of error for a 70% c...

Suppose I am using the t-distribution to estimate or test the mean of a sample from a single population. If the sample size is 25, then the degrees of freedom are ____? I have an answer of 26 is this correct

. A certain company makes 12-volt car batteries. After many years of product testing, the company knows that the average life of a battery is normally distributed, with a mean of 45 months and a standard deviation of 7 months. If the company does not want...

Suppose that x has a distribution with = 10 and = 5. If a random sample is taken of size n = 44, find . 10.00 my answer was 0.75 is this correct 0.75 1.51 0.11 5.00

What is meant by the 95% confidence interval of the mean ? That 95% of my sample is OK to do more tests. That I am 95% confident that the confidence interval will contain the parameter being estimated. That 5% of my sample is not OK. That I am 95% sure th...

. As the sample size increases The confidence interval also increases (gets larger) The confidence interval decreases (gets smaller) The confidence interval stays the same The population mean increases.

. Suppose that about 20% of those called will find an excuse (work, poor health, travel out of town, etc.) to avoid jury duty. If 14 people are called for jury duty, what is the probability that all 14 will be available to serve on the jury? Round your an...

A 16-ft ladder is sliding down a wall as shown in the figures below. The variable h is the height of the ladder's top at time t, and x is the distance from the wall to the ladder's bottom. Suppose that the top is sliding down the wall at a rate 5 ft/s. Ca...

how do you find the fractional notation for the ratio of 54.28 to 89.69

How does Anne use imagery to describe both the environment of her hiding place and the people in it?

Kate cut a 100-foot rope into two pieces. One piece was 5 feet longer than 4 times the length of the other. Find the length of each piece.

How did the Confederation Congress attempt to colve the problem of staus of western territory that the states had ceded to it? Which interest groups favored which plans for the sale and distribution of land?

pythagorean theorema=13 b=9 c=?

Yes or no. To have a favorable balance of trade, a country must sell fewer goods to other countries than it buys from other countries. Yes or no.Money is an example of an capital resource. Yes or no.In our economic system, people receive wages for produci...

Find: Re[1/(2+j)] Im[2+j/(3+4j)]

The drawing shows an elastic cord attatched to two back teeth and stretched across a front tooth. The purpose of the arrangement is to apply a force to the front tooth. If the tension in the cord is 1.2N what are the magnitude and direction of the force a...

Answers

The following answers were posted by visitors named Jacob.

That's what I was looking for. Thank you very much.

Thank you very much, drwls. I actually understand it now! (You saved me in Calculus!) :-)

The student is correct because the median is used to find the middle numeric value of a data set, the mean balances out the data so all numbers in a data set are the same. This means that the mean and median can only be used for a numeric data, so this st...

waves crush shells and stones to create sand

thank you very much Ms.Sue!!!!!!!!

you're very welcome!!!!!

i ment what is a number that divied by 3 has a remainder of 2 also that same number divided by 4 has a remainder 3 and that same number divided by 5 has a remainder of 4

Thank you very much! It conveys exactly what I was trying to say.

Thank you very much.

Thank you Ms Sue.

Thank you Ms. Sue. You really helped me.

i have a question with my algebra hw about (7Xto the6*ytothe9)to the4/3xtothe 10*y to the 4

no the second one left a half an hour later sorry i forgot to include that

564t=744(t-.5) 564t=744t-372 564t-564t=744t-372-564t 0=180t-372 0+372=180t-372+372 372=180t 372/180=180t/180 2.07=t Is that correct?

ok thank you for all of your help

false, has to be connected to the internet

wHAT DO I DO WITH THESE VALUES THEN...

Area of the house to be painted = A Bill pains "B" area per hour John pains "J" area per hour So, A/B = 4 hours, and A/J = 7 hours => B = A/4 and J = a/7 B and J says how much area they can paint per hour. When both of them work together, assume it takes...

Are you sure you wrote the question correctly? I do not understand how g which is a function of x is written as a function of t, and especially with the dt.

dD/dt = A(2pi/365)*cos [(2pi/365)*(t-80)] =0 for maximum or minimum (2pi/365)*(t-80) = n*pi/2 when n=1 gives maximum , then (t-80) = 365/4, for minimum n = 3 and t-80 = 3*365/4 (3) = dD/dt = +2/60 (4) = dD/dt = -2/60

Our teacher told us that the fourth partial sum approximates the sum of the sequence 7n/(n^3+1). The fourth partial sum is also the error of the sequence and our teacher asks us to find a number X such that the error is less than X.

plot it on a graph in your calculator. then see the number where the line continues to stay on for a y value. for example, lets say it will go up and down but when it hits x=4 the y value is 2 and every y value after that is 2, then the limit for infinity...

Ok, I got that, but what do I do with the 3.16 ×10^23?

so it would be 6.02 x 10^23 x 50? then whattt?

Is there anyway you could work this one out for me and explain what you did? I would probably learn a lot better than all of this reasoning and proportions. It's greatly appreciated.

ahhh, I get it now. thanks a lot, I actually did learn how to do it now, believe it or not.

WITH A(0,2),B(6,2)AND C(4,4) APPLY THE RULE (1.5X,1.5Y) TO THE VERTICLES OF TRIANGLE ABC TO GET TRIANGLE PQR. COMPARE THE CORRESPONDING MEASUREMENTS(SIDE LENGHTS,PERIMETER,AREA, AND ANGLE MEASURES) OF THE TWO TRIANGLES? THIS IS THE 1ST QUESTION OF 5 I HAV...

No,you can also multiply.

our cat katie usually drags its food out of the dish when its happy -Capital at the beginning of the sentence -Comma after cat -Capital for the noun's name -Apostrophe on both 'its' to show posession -Period at the end of the sentence so: Our cat, Katie u...

Neither sides are involved in a war perhaps.

if you are using APA, then its the (author, p. 4-9) I believe.

If 12.5 mL of 8.6 multiplied by 10-2 M NaOH is added to 32.5 mL of 6.0 multiplied by 10-4 M NaOH, what is the pH of the solution?

can you write me some kind of a equation or explain to me in a way which i can understand. because what they wrote is just flying over my head and i have already spent a good amount of time trying to figure these out. so please help

nvm i got it, thanks for the help guys.

It would be 2pi/6 because period (1 oscillation) = 2pi/b

momentum is p=mv so p(brother)=(35.6)(9.50)and p(skateboard)= (1.3)(9.50) solve and add them.

ok formula L=Iw i know I=5kgm^2 and i am finding w. How would i go about finding L give me a hint.

I do not see how Reiny went from: cosx(2sin^2x-1)/sinx TO (cosx/sinx)(-cos2x) if you break it up you get (cosx/sinx)((2sin^2x-1)/sinx) help im doing a take home exam lol

still questionable not understanding how to get the problem with the correct answer

It should be D. If the hypotenuse and leg of a right triangle are congruent to the hypotenuse and leg of another right triangle, then the triangles are congruent

Thank you Jen. U r great

Yes, thank you. I was doing it that way, but didn't know if I was correct.

I agree with SraJMcGin, that will give you the answers.

so than... 70's to 80's - 265000 increase 265000/124000=2.137= 213.7% Right?

how did you get 114???

just wondering...

i'm guessing to Megan that it is 717.7%???

the percent i think is because in the early days the price wasn't that high or expensive as today. my bad, heres my other, i think, ummm.... to start 10000 so if you add 10000 to 25000= 35000 then, 35000+89000=124000 nest, 124000+265000=389000 i'm guessin...

man than i must such at math than...oh well sorry megan .

no really were all just in the library helping each other get ready for a bug chem test

The example we were given was - He was a fine doctor, but he was growing old. My assignment was to find 5 sentences that use this pattern.

Thanks for your help.

2a) (4,1)x(4,4)/ (8,5)=4/56 For 2a, why is student 4,4? I don't understand that. I know that for 1 teacher, there is 4 student because there is 5-person committee. I don't know question b.

So, for b it is (4,3)(4,4) + (4,2)(4,1)/(8,5)= 28/56= 1/2?

If possible, can you help me with this question also? From a group of 10 girls and 10 boys, 10 will be chosen to form a committee. Find the probability that atleast ONE GIRL is chosen. I did it like this At least 1 girl so therefore I separated more than...

Thanks! T___T another question (Last one I promise, lol) The probability of a household subscribing to The Economist is 0.4 while the probability of subscribing to National Geographic is 0.6, and the probability of subscribing to NEITHER magazine is 0.2....

Thank you! I think I did this before but I forgot... How do you know whether or not to use those formulas in these kind of questions? rearrange formulas? P(A U B) = P(A) + P(B) - P(A and B) and P(A U B) = P(A) + P(B)

Ah, ok thank you!

Do you suggest any other topics that has a lot of information?

Not really having trouble with this one for some reason

6*6+6*6-6=24 Where would the parenthesis go?

Woops sorry and thanks lol

I don't understand? Can you please explain?

What i got was : a) K = (3.0x10^-6)(0.12)/(0.12)(0.12)= 0.6 b) i got 1.90%

i got K= (HOBr2)(OH)/(HOBr) 2.0x10^-9 = (x)(x)/0.18M x= 11x10^-6 (OH-) =11x10^-6 (H3O)= 1.0x10^-14/11x10^-6 =9.0x10^-8

K is the chemical symbol for which element?

Last one. What is the first element on the periodic table? I already answered these questions but I'm making sure they are correct:D Thanks

Because DeVry is asking you this question in this week's discussion...seriously, do the research yourself...see you in the threads!

1/2 is the same as .5 and 50% 2/5 is the same as .4 and 40% fractions, decimals and percentages are all interchangeable, however percentages are generally just used in charts for a marketing group to understand (they like percents better).

metals have lots of free or lose electrons that allows the energy to move freely while insulators electrons are tightly bound and don't allow for lots of energy movement

x^2 +6x+9=24+9 (X+3)^2=33 x+3=sqrt(33) x=+-sqrt(33)-3 or look up Quadratic formula

Thanks-got it cubic trinomial. Here's another one when I have to change signs of negatives and positives for addition and subtraction. How do I do for example 5w^2-4w-7-8w^2+3w-3?

No I do not want the Name I want to know how to figure it out once the numbers are all lined up and it is very confusing when signs need to be switched. Can you please explain that?

Thanks. There was ( ) on the 8 and the rest because your answer is not one of the answers

stratified sampling

Thank you, it worked... I was diving the wrong way

Is this the thesis: "Let every nation know, whether it wishes us well or ill, that we shall pay any price, bear any burden, meet any hardship, support any friend, oppose any foe to assure the survival and the success of liberty." ?

I think it woul be 1400 tickets because you are only making 1 dollar per ticket and you are shelling out 2500 to workers and players subtract 1100 you have 1400 dollars you have to add.

4.5 × 10−12 m

6/7 because 7/8 and 6/7

Seven was correct. Political culture is defined as a commonly shared set of beliefs and values about politics and government. The culture affects how people believe that politics should be carried out. Most countries have a unique political culture affect...

Yeah, what I accidently did was I tried to solve it further, but I completely over thought that. Thank you Bob!

Yeah, I was forgetful and forgot it was the Quotient Rule. Thank you all, I got it!

I believe B is correct :)

I had to miss my last week of Calculus due to some personal things, so I had not been through any lectures of optimization. It hurt me greatly, now I have a few of these that I don't know how to set up at all.

I know how to solve it to get .21, but I need to write it using positive exponents only. I know this isn't technically Calculus, but it is what we are reviewing currently. I am a bit rusty with this one, can't quite remember how to do it. I am trying some...

That's interesting you say that, listed under my professor's list of things we need to study, he has that listed. Do you believe it to be a mistake? Should I email him perhaps? I see what you are saying here. Thank you Bob.

Actually not because the problem is asking for 3 digits such as 100

Sorry made a mistake you are right