Saturday
December 10, 2016

# Posts by jb

Total # Posts: 80

math
Sarah bought 2 boxes of pencils. There were 58 pencils in each box. In the first box, 23 of the pencils were red, 18 were blue, and the rest were yellow.
December 1, 2016

math
if m set of 22 mathematics teachers and p is the set of 25 physics teachers and if 2 teachers both mathematics and physics, how many elements has MUP.
July 5, 2016

physics
A space station consists of two donut-shaped living chambers, A and B, that have the radii shown in the drawing. As the station rotates, an astronaut in chamber A is moved 1.99 102 m along a circular arc. How far along a circular arc is an astronaut in chamber B moved during ...
April 4, 2016

PRECALC
4. REVIEW: Let f(x) = 2^x and g(x) = √(x − 7). Find and simplify completely. a. )( f(3+h)-f(3) )/8h b.) (g ◦ f)(5) / (f ◦ f)(3)
March 26, 2016

precalc
Solve the equation. (Enter your answers as a comma-separated list.) 5x^2e^(−2x) − 3x^3e^(−2x) = 0
March 15, 2016

precalc
Solve the equation. (Enter your answers as a comma-separated list. Round your answers to four decimal places.) 2^x − 8(2^−x) + 2 = 0
March 15, 2016

precalc
2^(3x + 1) = 3^(x − 2) (a) Find the exact solution of the exponential equation in terms of logarithms.
March 7, 2016

precalc
Solve the logarithmic equation for x. (Enter your answers as a comma-separated list.) log2(x + 17) − log2(x − 2) = 1 2 is the base for the log.
March 7, 2016

chem
Calculate the amount of heat required to raise the temperature of a 65-g sample of water from 32∘C to 65∘C. (The specific heat capacity of copper is 4.184 J/g∘C.) Q=M*C*delta T 65g*4.184*(65-32) 89.7 J
January 31, 2016

AP Physics
A car traveling in a straight line has a velocity of 3.24 m/s at some instant. After 3.28 s, its velocity is 8.18 m/s. What is its average acceleration in this time interval? Answer in units of m/s 2 .
November 6, 2015

physics
how do you plot T2 2.14, 2.10, 2.08, 2.03, 2,20 and 2.30 and length .445, .54m, .497m, .50m, .53m and .555m on a graph and how do you find the gradient
October 25, 2015

English
Which sentence most clearly exhibits bias? A. The professor’s points appear to be based on outdated research. B. If my argument is true, Blake’s argument is clearly false. C. Few would disagree that poor people are incapable of rational thinking. D. When a major ...
March 7, 2015

English
“Nature is bountiful, which is why logging should be strictly regulated.” Which logical fallacy is illustrated in this sentence? A. Ad hominem B. Non sequitur C. Post hoc ergo propter hoc D. Red herring
March 7, 2015

public speaking
Demographics is important to know your: A. speech. B. topic. C. audience. D. location of speaking event.
December 20, 2014

chemistry
An aqueous solution of cobalt(II) nitrate has a concentration of 0.471 molal. The percent by mass of cobalt(II) nitrate in the solution is %.
August 21, 2014

chemistry
How many grams of NiI2 are there in 263 grams of an aqueous solution that is 33.5 % by weight NiI2.
August 21, 2014

chemistry
How many grams of NaOH are there in 187 grams of an aqueous solution that is 7.06 % by weight NaOH.
August 21, 2014

English
All of these are ways to correct comma splices, run-ons, and fused sentences except A. join two independent clauses with a coordinating conjunction. B. separate the two clauses with a period. C. join two independent clauses with a subordinating conjunction. D. join the two ...
May 29, 2014

science pls help
March 13, 2014

physics
A 58.2 g object is attached to a horizontal spring with a spring constant of 11.8 N/m and released from rest with an amplitude of 24.4 cm. What is the velocity of the object when it is halfway to the equilibrium position if the surface is frictionless?
February 24, 2014

grammar
The carriage has crossed the bridge and arrived at the mansion. The carriage crossed the bridge and has arrived at the mansion. ???
December 10, 2013

grammar
directions: rewrite the 2 sentences as 1 sentence by combining the main verbs and helping verbs...The carriage has crossed the bridge. The carriage has arrived at the mansion.
December 10, 2013

Which of the following statements about the money invested in a traditional IRA account is correct? A.it isn't taxed until it's withdrawn. B.it's subject to double taxation. C.it's taxed as you make deposits. D.it isn't taxed.
November 21, 2013

Public speaking
no 2 is B
March 28, 2013

College Physics
A block weighing 70.0 N rests on a plane inclined at 25.0° to the horizontal. A force F is applied to the object at 50.0° to the horizontal, pushing it upward on the plane. The coefficients of static and kinetic friction between the block and the plane are, ...
October 9, 2012

College Physics
A rifle bullet with a mass of 17.5 g traveling toward the right at 293 m/s strikes a large bag of sand and penetrates it to a depth of 23.6 cm. Determine the magnitude and direction of the friction force (assumed constant) that acts on the bullet.
October 9, 2012

public speaking
D is wrong
September 27, 2012

Physics
please help me if you can. I have no values, just diagrams. the first diagram: a box is attached to a rope and pulled along a floor with the rope parallel to the floor. The second diagram: a box is attached to a rope and pulled along a floor with the rope at an angle (upwards...
September 24, 2012

Physics
well I have 3 diagrams and I'm supposed to rank them in order of strongest normal force to weakest normal force, so I'm just not sure how to tell which is the strongest.
September 24, 2012

Physics
How can you tell which force diagrams have a strong normal force and which ones have a weak normal force?
September 24, 2012

physics
if the reaction time is 10.0s, how far will the car travel before hitting the brakes? Vf = 27.42 m initial speed = 80 km/hr coefficient of friction = 1.00
June 25, 2012

Number 8 is D
May 25, 2012

AAT
those are supposed to be square root symbols. I'm not sure what happened...
April 8, 2012

AAT
ã3tanx=3tanxcscx-ã3tanx
April 8, 2012

Chemistry
Thank you so much! Another question, the directions say, Determine the [H3O] and [OH] of each of the following solutions. Lime Juice, pH= 1.9 Kitchen Cleaner, pOH= 4.75 Tomato Juice, pH= 4.23 How do I do this?
April 4, 2012

Chemistry
I think i figured it out, would the pH be .9?
April 4, 2012

Chemistry
hi DrBob222, thanks for your help. I understand that part, but how do you solve it using only the molarity?
April 4, 2012

Chemistry
what are the pH and the pOH of 0.125M HCIO4?
April 4, 2012

math
solve for sine theta of 3.14/3
March 21, 2012

statistics
about 13% of the population is nervous around strangers. If 2 people are randomally seclected, what is the probability that both are nervous around strangers?
January 21, 2012

College Algebra
Verify the function f and g, are inverses of each other by showing that f(g(x))=x and g(f(x))=x Graph the functions. f(x)=6/(1-x) g(x)=(1-6/x)
January 3, 2012

Rational Zeros
List all possible rational zeros for the polynomial below. Find all real zeros of the polynomial and factor f(x)=2x^4+19x^3+37x^2-55x-75
January 2, 2012

Functions/End behavior
f(x)=x^2(x^2-2)(x+2) Determine the end behavior, find the power function that the graph of f resembles for large values of |x| Find the maximum number of turning points
January 2, 2012

Functions of f(x)
Given the two functions f(x)and g(x)‚0 for all x, explain how to find (f+g)(x),(f-g)(x),(f*g)(x), and (f€g)(x).Demonstrate examples for all: f(x)=(-x)/(6)-3(5+3x)/(8)-3x f(0)=-15/8
January 1, 2012

Living Environment
having a hard time finding this information on google and i really need help for some questions. What are 3 abiotic factors that influence the: Highlands of Ethiopia Patagonia The Rockies Pakistan and the Himalayas Forests of Eastern China
November 8, 2011

Chemistry
I'm trying to figure out the formula for one liter of 1M K2HPO4 (Potassium Phosphate Dibasic). I know the amount of K2HPO4 is 174.18grams and you make it to equal one liter with dH2O, but I can't find where anyone has actually written the amount of dH2O to use. Without...
June 6, 2011

history
thanks really just trying to get my thesis statement straightened out its a very broad subject
May 9, 2011

history
how has "liberty and justice for all" changes from 1492 to 1865? may include race, class, religion, politics, gender, economics, culture
May 9, 2011

English
Casual Wear is popular with American teenagers for sure.
March 30, 2011

literature
summarize the major similarities and differences between the forms of drama, poetry, and the short story. Demonstrate your ideas with textual examples from the course readings. In your response, include at least one example of each literary form.
March 22, 2011

Science
Thank you, J-B-
March 7, 2011

Science
March 7, 2011

Science
how long does it take for one water molecule to complete the water cycle?
March 7, 2011

physics
A ball is thrown straight upward and then returns to the earth. choosing the positive direction to be upward, sketch a graph of the velocity of this ball against time. where does the velocity change direction? Explain?
February 24, 2011

physics
a rock is dropped from the top of diving platform into the swimming pool below. will the distance traveled by the rock in a 0.1 second interval near the top of the flights be the same as the distance covered in a 1.1 second interval just before it hits the water? Explain?
February 24, 2011

chemistry
when you add manganese dioxide to hydrogen peroxide does the temperature decrease or does it form a precipitate?
September 24, 2010

algebra
x=150 electric tower
August 22, 2010

science
Can someone explain to me using a formula, why an increase in carbon dioxide makes the blood more acidic.
April 28, 2010

bio
the systemtic system of the heart sends oxygenated blood and nutrients to all body cells. If the questions were does it send oxygenated blood and nutrients to all body tissue would the answer be yes or no. cells make tissues so would it be yes?
February 1, 2010

english
January 20, 2010

english
Where should the commas be placed in this sentence? Players came from places such as Red Hill Pennsylvania and Popular Point Manitoba Canada.
January 20, 2010

precalculus
the vertex of y^2 - 8y + 24 = x is... (9,3) (24,0) (8,4) (4,8) or none of these
December 6, 2009

precalculus
which conic section is this the equation for? 3x^2 - 9x + 2y^2 = 15
December 6, 2009

physics
It has been suggested that rotating cylinders about 12 mi long and 5.4 mi in diameter be placed in space and used as colonies. What angular speed must such a cylinder have so that the centripetal acceleration at its surface equals the free-fall acceleration on Earth?
November 21, 2009

Algebra
Great explanation. I totally get it now. I think I can actually finish the rest. Thanks for your help!
November 13, 2009

Algebra
A total of 475 tickets were sold for the school play. There were 75 fewer student tickets sold than adult tickets. How many adult tickets were sold?
November 13, 2009

PreCalc (Just Can't Comprehend)
If P = 2x + 2y and xy=400, then the perimeter is P(x)=2x + 800/x. In a pre-calc course you could only be expected to find the minimum value of P(x) by inspection of a graph. See the "graph of p = 2x + 800/x from 0 to 40" at wolfram alpha. OR, by creativity ... The ...
November 1, 2009

English
Calm Thank you for your help
October 22, 2009

English
What are the predicate adjectives in this sentence? The charmer must remain calm as the cobra flares its hood menacingly.
October 22, 2009

Language
Are these two sentences complete or incomplete? A large red fox with its young. A day sunbathing on the beach.
August 22, 2009

science
CellTheory
October 7, 2008

Chemistry
Hi there. I'm doing a paper on Biology (yes I know, will explain the chem link in a sec) and in it am trying to find the best pH level for Slaters, using limewater and filtered water to change concentrations. I have done experiments and using bunch of ratios (eg 2 parts ...
May 7, 2008

social studies
Britain I believe
May 6, 2008

Physics EM
Physics2212 students... lets all protest against mastering physics.
March 10, 2008

Medical
It was discovered that a medical assistant discussed the medical condition of a high-profile individual in public. This resulted in the condition becoming publicized information. What were the influential factors in this situation for the medical assistant? Thanks in advanced JB
January 23, 2008

1. Pages:
2. 1