Tuesday
October 25, 2016

# Posts by Bob

Total # Posts: 3,074

Calculus
Thank you so just to clarify for a) all you did was take the integral of the acceleration to get your v(t) function. Then for b) do you set v=2+3t equal to 14? c)You just take the integral of v(t) to get position function I think.
July 6, 2014

Calculus
A particle moves with a fixed acceleration of 3 m/s^2. If its initial velocity is v(0)= 2 m/s, and its initial displacement is s(0)= 0 A)Find its velocity function v(t) B)How long does it take for the particle to reach the velocity 14 m/s? C)Find the distance traveled when its...
July 6, 2014

math
convert y=2x^2+5x-5 into vertex form
July 4, 2014

AP Macroeconomics
nobody likes you :(
July 3, 2014

physics
The force applied to the bar is 34*9,8 = 333.2 N. The extension of the wire ∆L = 0.0145 m, so the bar stiffness is F/∆L = 2.30*10^4 N/m The number of atoms in one layer of cross section is area of the bar divided by the area of one atom =0.0012²/(2.84*10^-10)&...
June 26, 2014

Calculus
Given f(x) = csc^4(5x^2-3x+1), find f'(x). Show all work.
June 23, 2014

English
I need to find a sensationalised news article homework a and then highlight sensational parts please help'!!!
June 21, 2014

math
Perform a one-way ANOVA analysis, testing at the 0.05 level. Also, calculate the mean number of sick days for each group. Describe your results. . Group Sick days per year Placebo: 7, 4, 6, 8, 6, 6, 2, 9 Flu Shot 1: 5, 3, 3, 5, 4, 7, 3, 3 Flu Shot 2: 2, 4, 1, 2, 2, 1, 2, 5
June 21, 2014

Statistics
I began to think of the binomial distribution with the common heads or tails coin flipping experiment example...I believe my question in #3 is related to that, and in fact I think the generalization is what applies, the "multinomial" distribution...any thoughts from ...
June 12, 2014

Statistics
You have these 10 observations of some event X: 1.03 1.022 1.022 1.01 1.026 1.02 0.95 1.005 1.05 1.023 Here is the sorted list from least to greatest: 0.95 1.005 1.01 1.02 1.022 1.022 1.023 1.026 1.03 1.05 Based on this data alone: 1) It makes sense to say P(X <= 0.95) = 1/...
June 12, 2014

Pre algebra
Sophie has 5 pieces of string that are 4 yards each. She uses 3 pieces that are each 3 feet long. How much string does Sophie have left?
June 8, 2014

Physics
. A rock is thrown up into the air with an initial velocity of 15m/s up. What is the rock's velocity after 0.40 seconds?
June 8, 2014

Chemistry
a) Which of the following reagents would oxidize Zn to Zn2 , but not Ag to Ag ? Answers are: Co2+ Ca2+ Br2- Br2 Co or Ca b) Which of the following reagents would oxidize Ag to Ag , but not Cl– to Cl2? Answers are: Co Br- Br2 Co2+ Ca2+ or Ca
June 2, 2014

Geometry
Need help solving this problem so confused The tries of an automobile have a diameter of 22 inches. If the wheels revolve ten times, how far does the automobile move? Round your answer to the nearest tenth of a foot and show your work
May 29, 2014

geography
B. 200,000
May 26, 2014

Chemistry
The mechanism for the reaction described by No2+CO--->CO2+NO is suggested to be (1)2NO2--->NO3+NO (2)NO3+CO--->NO2+CO2 Assuming that [NO3] is governed by steady-state conditions, derive the rate law for the production of CO2(g) and enter it in the space below. rate of...
May 23, 2014

Algebra
Participants in a study of a new medication received either medication A or a placebo. Find P(placebo and improvement). You may find it helpful to make a tree diagram of the problem on a separate piece of paper. Of all those who participated in the study, 80% received ...
May 21, 2014

algebra
i'm thinking of two numbers, x and y. The sum of 4x and 1 is y. The sum of y and twice x is 13. Find x and y.
May 21, 2014

Science
The foreskin, a loose fold of skin that covers the penis is also called the ________. A. Spongiosum B. Androgen C. Prepuce D. Scrotum I think C 99% sure, but my book says its preouce, not prepuce. (Maybe it's a typo?)
May 20, 2014

Science
Thanks :)
May 20, 2014

Science
The filtered out word is org(a)sm. (Not sure why it's filtered out as it isn't a bad word......)
May 20, 2014

Science
The male sexual response includes erection and orgasm accompanied by ________. A. Ejaculation of semen B. Relaxation C. Restoration D. Stimulation I think it's B,but I also think it is A. Not sure which is the best choice.
May 20, 2014

Math
A biologist has determined that a particular osprey has a 70% chance of catching a fish on any given day. Carry out a simulation of 20 trials using the random number table below to find the probability that the osprey will actually catch a fish on all of the next three days. ...
May 20, 2014

Algebra 2
A biologist has determined that a particular osprey has a 70% chance of catching a fish on any given day. Carry out a simulation of 20 trials using the random number table below to find the probability that the osprey will actually catch a fish on all of the next three days. ...
May 20, 2014

physics
A fire hose exerts a force on the person holding it. This is because the water accelerates as it goes from the hose through the nozzle. How much force is required to hold a 7.5 cm diameter hose delivering 450 L/min through a 0.80cm diameter nozzle?
May 20, 2014

algebra
I have 8 cups of a juice drink consisdting of 25% oj and 75% apple juice. I want to make a mix with 40% oj. how many cups of oj must I add?
May 19, 2014

Physics
A yo-yo is spun from rest by pulling on the string with a constant tension of 2.0 N. The radius of the inner rod on which the string is strung round is 0.50 cm. The tension is applied for 5.0 seconds after which the yo-yo is observed to spin with an angular velocity of 15 rad/...
May 18, 2014

MAT 201
The number of vacation days taken by employees of a company is normally distributed with a mean of 14 days and a standard deviation of 3 days. For the next employee, what is the probability that the number of days of vacation taken is less than 10 days? More than 21 days?
May 15, 2014

statistics
The number of vacation days taken by employees of a company is normally distributed with a mean of 14 days and a standard deviation of 3 days. For the next employee, what is the probability that the number of days of vacation taken is less than 10 days? More than 21 days?
May 15, 2014

Geometry
How to foil 2xsquared - x - 15=0
May 14, 2014

pre cal
For a normal curve, what percentage of values falls beyond two standard deviations from the mean?
May 12, 2014

Maths
Find the exact value of cos^2(15°)-cos^2(30°)+cos^2(45°)-cos^2(60°)+cos^2(75°)
May 9, 2014

chemistry
1.06L
May 8, 2014

Chemistry
Nevermind I figured it out its: 2SO3^2- + 2H2O + 2e^- ---> S2O4^2- + 4OH^-
May 4, 2014

Chemistry
Is it: H2O + SO3^2- ---> SO4^2- +2H^+ + 3e^-
May 4, 2014

Chemistry
Balance the following equation for a half reaction that occurs in basic solution. Use e– as the symbol for an electron. SO3^2- ---> S2O4^2-
May 4, 2014

Chemistry
Thanks a lot i figured this one out too its: 2H2O + MnO2 + 3Cu^2+ ----> MnO4^- + 3Cu^+ + 4H^+
May 4, 2014

Chemistry
This is how I am doing it: 1. break up into half reactions MnO2--->MnO4 and Cu^2+ ---> Cu^+ 2. add H20, H+, and e- to both sides and I get: 2H2O + MnO2 ---> MnO4 + 4H + 8e^- and e^- + Cu^2+ ----> Cu^+ then adding them I get: 2H2O + MnO2 + Cu^2+ ---> MnO4 + Cu...
May 4, 2014

Chemistry
In a particular redox reaction, MnO2 is oxidized to MnO4– and Cu2 is reduced to Cu . Complete and balance the equation for this reaction in acidic solution. Phases are optional. MnO2 + Cu^2+ ---> MnO4^- + Cu^+
May 4, 2014

English Literature
THANK YOU SO MUCH
May 1, 2014

English Literature
We have just finished reading Poe's "The Fall of the House of Usher" and I need to explain, in a paragraph what "Roderick is all mind in a weak body" means. I think it's somehere along the lines of his spirit being alive but his exterior being dead...
May 1, 2014

chemistry
if 7 moles O2 are used, houch energy is produced?
April 30, 2014

french
unscramble - qobusteiu
April 29, 2014

Chemistry
How do you calculate ΔSfus and ΔSvap for HCl given melting point,ΔHfus, boiling point, and ΔHvap also how do you determine the entropy change when 5.20 mol of HCl(l) freezes at atmospheric pressure.
April 25, 2014

Chemistry
The following equation represents the decomposition of a generic diatomic element in its standard state. (1/2)X2(g)--->X(g) Assume that the standard molar Gibbs energy of formation of X(g) is 5.45 kJ·mol–1 at 2000. K and –64.30 kJ·mol–1 at 3000...
April 25, 2014

Chemistry
Ok thanks a bunch!
April 24, 2014

Chemistry
how do you find lnQ?
April 24, 2014

Chemistry
For a gaseous reaction, standard conditions are 298 K and a partial pressure of 1 bar for all species. For the reaction C2H6(g)+H2(g)---->2CH4 the standard change in Gibbs free energy is ΔG° = -32.8 kJ/mol. What is ΔG for this reaction at 298 K when the ...
April 24, 2014

Chemistry
A critical reaction in the production of energy to do work or drive chemical reactions in biological systems is the hydrolysis of adenosine triphosphate, ATP, to adenosine diphosphate, ADP, as described by ATP(aq) +H2O (l) --->ADP(aq) +HPO4^2- for which ΔG°rxn = &#...
April 24, 2014

math
the drawing below measures 7.8 cm by 6.2 cm what is the perimeter in meters? scale 1cm=10m the drawing is square
April 24, 2014

Social Studies
who i right?
April 24, 2014

science 1 question
ocean trenches are formed when the denser oceanic plate sinks
April 23, 2014

health
April 19, 2014

econ
You want to determine the profit-maximizing production quantity for a monopolist. You can ask the firm's consultant to draw the firm's revenue and cost curves, but each curve would cost you \$1,000. From the following list indicate which curves you will request and why...
April 12, 2014

Macroeconomics
I need help to answer this question? You want to determine the profit-maximizing production quantity for a monopolist. You can ask the firm's consultant to draw the firm's revenue and cost curves, but each curve would cost you \$1,000. From the following list indicate ...
April 12, 2014

physics help!
a!!! It's A!
April 10, 2014

Health
A pound of butter since butter has more fat than lean meat does.
April 3, 2014

Health
Which would produce a greater number of Calories- a pound of lean meat or a pound of butter? Why is it so?
April 3, 2014

Math
The entrance hall to the Louvre Museum in Paris is a glass and metal pyramid with a surface area of approximately 1980 square on each side . The base of the pyramid is a square that is 35.4 meters on each side. What is the slant height of the pyramid ? Round to the nearest ...
April 2, 2014

health
April 2, 2014

Science
a certain object has a volume of 25.0 mL and a mass of 100 g. What is the density of the object
March 31, 2014

4 is C. and 5 is true.
March 31, 2014

educational technology
March 30, 2014

math
I need help
March 24, 2014

Algebra 1
Hi! I'm doing my math homework, but I got confused. Can someone please help me how to solve simplest radical forms with an example? With square roots?
March 20, 2014

Computers
System A consists of a single ring with 100 stations, one per repeater. System B consists of four 25 stations rings linked by a bridge. If the probability of a link failure is , a repeater failure is , and a bridge failure is , derive an expression for parts (a) to (e). 50 ...
March 17, 2014

Calculusmath
what is an equation of the conic section x^2+y^2=16 after a rotation of 45 degrees about the origin. A. (x')^2+(y')^2=16 B. (x')^2- (y')^2=16 C. (x')^2- 2x'y'+(y')^2=16 D. (x')^2+ 2x'y'+(y')^2=16
March 12, 2014

chemistry
Phosphoric acid is a triprotic acid, so H3PO4, H2PO4 -, and HPO4 2- are all acids. Which of the solutions below would have the lowest pH? 0.1 M NaH2PO4 0.1 M Na2HPO4 0.1 M Na3PO4
March 10, 2014

World Geography
If I were elected an official, I'd first of all be totally freaked out. That's because fifteen year old shouldn't be elected any type of office until their old enough to get a job. But second of all I'd try to fulfill whatever duty I was elected to do. I would...
March 6, 2014

Physics
A train 500 m long is moving on a straight track with a speed of 84.2 km/h. The engineer applies the brakes at a crossing, and later the last car passes the crossing with a speed of 16.4 km/h. Assuming constant acceleration, determine how long the train blocked the crossing....
March 5, 2014

Physics
Does it take twice the work to stretch a spring 2cm from its equilibrium position as it does to stretch it 1cm from its equilibrium position?
March 5, 2014

Science
1.a 9.d 10.c
March 5, 2014

Math
150 + 50 x 17 = 1000 (1 km)
March 4, 2014

math 4
40 cm and 40 in
March 3, 2014

computers
1. It is important to include voice and point of view in writing because (1 point) A. It helps the reader understand the characters feelings and emotions B. It adds more words to the story C. It makes the information stand out D. It makes the story more important 2. A venn ...
March 3, 2014

Finance
940=34.5(PIVIFAr%,n)1,000(PVIFr%,n)
February 25, 2014

social studies
do ur own homwurk
February 23, 2014

ecology
If you observe no changes in gene frequencies in a population over several generations, can you conclude that the population is not subject to natural selection?
February 20, 2014

English
If I wanted to search romanticism I would have done it, but I was hoping someone who already knows about it could help push me in the right direction/give me something to go on.
February 20, 2014

English
What was poetry like during the Romantic period? Discuss three characteristics of Romanticism. I'm looking for 1-2 sentences for the first question, and maybe 3-6 for the second question. Thank you so much to anyone who helps. Any help is appreciated. :)
February 20, 2014

Chemistry
A 150.0 mL sample of a 1.50 M solution of CuSO4 is mixed with a 150.0 mL sample of 3.00 M KOH in a coffee cup calorimeter. The temperature of both solutions and the calorimeter was 25.2°C before mixing and 31.3°C after mixing. The heat capacity of the calorimeter is 24...
February 18, 2014

math
A manufacturer produces a 4-cup and 8-cup coffee maker. The 4-cup maker takes 6 hours to produce and the 8-cup takes 9 hours. The manufacturer has at most 500 hours of labor per week. a. Write an inequality to represent the number of each type of coffee makers they can produce...
February 17, 2014

Wave
Rebecca is wrong, but Henry is right.
February 8, 2014

science
1.What two things happen to particles in a substance when the substance is heated? 2. What are the three most common states of matter on Earth? 3. Why does a liquid take the shape of whatever container it is in but does not expand to fill the container completely? 4. A certain...
February 8, 2014

math
Oregon is about 400 miles from west to east, and 300 miles from north to south. If the image of Oregon on a map is 15 inches tall (form north to south), about how wide is the image of Oregon on the map?
February 6, 2014

physics
ind the force of gravity between a newborn baby (mass = 2.9kg ) and the planet Mars (mass = 6.4×10^23kg), when Mars is at its closest to Earth (distance = 5.6×10^10m).
February 2, 2014

physics
Find the force of gravity between a newborn baby (mass = 2.9kg ) and the planet Mars (mass = 6.4×1023kg), when Mars is at its closest to Earth (distance = 5.6×1010m).
February 2, 2014

algebra
The perimeter of a pool is 64 feet and has a width of x and a length of x-4. Write an equation and find both the width and length of the pool.
February 1, 2014

Chemistry
Calculate the enthalpy change of formation for the following reactions using Hess's law, and the enthalpies of formation given in Figure 4: b) MgO +2HCl --> MgCl2 +H2O c)NaOH+ HCl -->NaCl +H20 Figure4: the given enthalpies of formation compound values are: Mg(OH)2 is...
January 30, 2014

Physics
For a rotating object the equation for acceleration is a = v^2 / r. The force is F = m*a = m*v^2 / r. The force in this problem is the coulomb force. F = k*3q*q / r^2 = m*v^2 / r Since the kinetic energy is just m*v^2 / 2, and that's all we need, let's multiply both ...
January 27, 2014