Friday
December 19, 2014

Posts by BOB


Total # Posts: 2,499

math
t(n)
December 17, 2014

math
the third term of a geometric sequence is 25 and the eighth term is 25/32. find a, r, and t
December 17, 2014

math
that's dumb is there a different way to do it? with a formula?
December 17, 2014

math
an employee is paid $3600 for the first month. she is paid an additional 1% at the end of the second month, which means a total of $3636. she continues to receive a 1% raise each month for a full year. what is her total salary at the end of the year?
December 17, 2014

Stat
Assume that a procedure yields a binomial distribution with a trial repeated n times. Use a binomial probabilities table to find the probability of x successes given the probability p of the success on a given trial N=9 X=0 p=0.30
December 17, 2014

math help
thank you !
December 16, 2014

chemistry. please help drboz222
Calculate the oxygen ppm concentration of a 3.50 kg sample of lake water that comtains 2.34 mg of dissolved oxygen
December 16, 2014

Economics
What are two reasons why the values of corporations fluctuate? Explain. My answer: Competition and events in the world
December 15, 2014

Math
A fence 12ft high runs parallel to a tall building at a distance of 2ft from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?
December 13, 2014

Algebra
James, Karen, and Lou are hiking. Lou forgot to bring any water. James brought 2 gallons of water and Karen brought 1 and 3/4 gallons of water. The three of them agree to divide all the water equally among them. Lou gives $2 for the water he receives, which James and Karen ...
December 11, 2014

Algebra
Our basketball team has finished 80% of its season, during which we won 40% of the games we played. What percent of the remainder of our games must we win in order to finish the season with the same number of wins as losses?
December 7, 2014

ratio and rates
Gina's art teacher mixes 9 pints of yellow paint with 6 pints of blue paint to create green paint. Gina mixes 4 pints of yellow paint with 3 pints of blue paint.
December 7, 2014

math
no
December 7, 2014

physics
Three blocks A, B, and C are connected by two massless strings passing over smooth pulleys as shown below, with the 3.4-kg block on a smooth horizontal surface. Calculate the tension in the strings connecting A and B, and, B and C.
December 5, 2014

Chemistry
Kc is 1.67 × 1020 at 25°C for the formation of iron(III) oxalate complex ion: Fe3+(aq) + 3 C2O42-(aq) [Fe(C2O4)3]3-(aq). If 0.0200 M Fe3+ is initially mixed with 1.00 M oxalate ion, what is the concentration of Fe3+ ion at equilibrium?
December 2, 2014

Chemistry
The equilibrium constant, Kp, equals 3.40 for the isomerization reaction: cis-2-butene trans-2-butene. If a flask initially contains 0.250 atm of cis-2-butene and 0.145 atm of trans-2-butene, what is the equilibrium pressure of each gas?
December 2, 2014

Algebra
(7.8*10 to the 12th power)*800=(7.8*10 to the 10th power)*80,000 Directions:tell whether each equation is true or false. if false, write the inequality in like terms I don't remember how to start multiplying.
November 30, 2014

Math
ASHLEY BORROWED 3 BOOKS FROM THE LIBRARY. THIS WAS 25% SHE CHECKED OUT. HOW MANY BOOKS DID SHE CHECK OUT
November 26, 2014

Physics
A 85-Kg firefighter climbs up a ladder at a constant speed of 2.5 m/s. What average power does the firefighter expend to overcome gravity?
November 25, 2014

math
what are the steps in determining how to maximize the area of a rectangle given a specific perimeter?
November 23, 2014

math
what is 1/3 divide 5/8
November 22, 2014

physics
A solid disk rotates in the horizontal plane at an angular velocity of 0.040 rad/s with respect to an axis perpendicular to the disk at its center. The moment of inertia of the disk is 0.13 kg·m2. From above, sand is dropped straight down onto this rotating disk, so ...
November 16, 2014

Chemistry Buffers
Write reactions showing how each of the following buffers would neutralize added HCl. HF and NaF Express your answer as a balanced chemical equation. Identify all of the phases in your answer. HC2H3O2 and KC2H3O2 Express your answer as a balanced chemical equation. Identify ...
November 16, 2014

physics
A ball with radius 12cm rolls on a level surface, and the translational speed of the center of mass is 0.35 m/s. What is the angular speed about the center of mass if the ball rolls without slipping?
November 16, 2014

math fractions
•math - Ms. Sue, Sunday, November 16, 2014 at 12:39pm 12 •math - bob, Sunday, November 16, 2014 at 12:56pm Ms. Sue can you tell me how you got that answer please. •math - Ms. Sue, Sunday, November 16, 2014 at 1:09pm Multiples of 6: 6, 12, 18, 24 Multiples of 4: ...
November 16, 2014

math
thanks mrs. sue. I understand now how I should get the lcm but how do I figure out how many pounds of meat will be in the meat loaf? when I multiply do I work the problem like this.... 3/4 *5/6 =9/12*10/12 =90/12 =7 6/12 =7 1/2 is this correct?
November 16, 2014

math
Ms. Sue can you tell me how you got that answer please.
November 16, 2014

math
Tom is making meatloaf with 3/4 pound of turkey and 5/6 pound of ground beef. What is the LCM he should use to find the total number of pounds of meat? How many pounds of meat will be in the meat loaf? Show your work Completely.
November 16, 2014

physics
A piece of putty of mass m = 0.75 kg and velocity v = 2.5 m/s moves on a horizontal frictionless surface. It collides with and sticks to a rod of mass M = 2 kg and length L = 0.9 m which pivots about a fixed vertical axis at the opposite end of the rod as shown. What fration ...
November 14, 2014

algebra
Andy hit three less field goals than three times the number of field goals Gary hit. Together, they scored 17 field goals. Write and Solve an equation to find how many field goals Gary and Andy scored.
November 11, 2014

Chemistry
What is the approximate ΔH in kJ for the following reaction as written: 2NH3(g) --> 3H2(g) + N2(g) Careful, what kind of bond does the nitrogen molecule make?
November 10, 2014

Chemistry
Arrange the following diatomic molecules in order of weakest to strongest bond: HF, HCl, HBr, and HI.
November 10, 2014

Chemistry
Which of the following ionic compounds has the highest melting point? Help: Lattice energy Select one: a. Cs2O b. K2O c. BeO d. SrO e. LiF f. CsI
November 10, 2014

physics
Sum of forces is F=mg-2.3N F=9.8*2.7N-2.3N F= 26.46-2.3 F=24.16 But F=ma 24.16N=2.7kg*a a= 8.96m/s^2
November 8, 2014

chemistry
How many atoms of oxygen are there in 5.00g of copper(II) sulfate pentahydrate?
November 4, 2014

Engineering
Have a new tutor who has failed to teach us most of his assignment, I've finally got stuck on derivation of the formula G=E/2(1+v). any help would be much appreciated!
November 3, 2014

Chemistry
If ununseptium (element 117) reacts with oxygen what would be equation of the product? Thanks so much!
November 2, 2014

Math
5/6=1/3-x
November 1, 2014

engineering
I've answered it myself i think. The liquid is being compressed therefore the change in volume should be negative. if someone could verify that'd be great
November 1, 2014

engineering
should my calculated bulk modulus of a liquid be (-)? the lookup tables i'm comparing the results too have positive values, or is it written without the (-) as a negative bulk modulus is impossible?
November 1, 2014

English
substitute the given words in and see if it makes sense the answer is when
November 1, 2014

Math
21
October 29, 2014

math
Try setting up a proportion.
October 27, 2014

math
Why would you add 2+5?
October 27, 2014

math
Where did you get the 7 from? Check again. I'll be glad to check your work.
October 27, 2014

algebra
The slope of a horizontal line is 1. The equation of the horizontal line passing through (4, 5)is _______?
October 24, 2014

algebra
Find an equation of the line that satisfies the given conditions. Through (5, 3) and (4, 7)
October 24, 2014

calc
A water trough is 7 m long and has a cross-section in the shape of an isosceles trapezoid that is 40 cm wide at the bottom, 100 cm wide at the top, and has height 60 cm. If the trough is being filled with water at the rate of 0.3 m3/min how fast is the water level rising when ...
October 23, 2014

stats
The probability that a football game will go into overtime is 18%. In 140 randomly selected football games, what is the mean and the standard deviation of the number that went into overtime?
October 21, 2014

Science
xciojiovjeio
October 21, 2014

Math
Suppose that water is pouring into a swimming pool in the shape of a right circular cylinder at a constant rate of 3 cubic feet per minute. If the pool has radius 6 feet and height 10 feet, what is the rate of change of the height of the water in the pool when the depth of the...
October 21, 2014

Math
A sphere has a volume of 200m3 . What is the volume of the smallest cube that this sphere would fit inside of? (Hint: try drawing a diagram of a side or top view of this situation)
October 14, 2014

pre cal
i;fo:OI jfiiejf ;soiej ;si edjis s;i ijd;si s;id dji s;ijaiwej faiw f ;wijf ;aeij fiaejd ;aie ; eiwfj ;awie eij;ije aweinrr r fkr rr;IEJR JREI rjir; rj W JIRJ R;RJ RF ZIRJ F; ZERJIFSE; TS GDR H SR TH RYHSRTHB DFV dfvszdf dv svsf vefv zf Figure out my code...-_- ...
October 13, 2014

pre cal
How fast is the tire traveling in mph if it does 2 rotations in 2 seconds with a diameter of 27 inches for the tire?
October 13, 2014

statistics
.4332
October 12, 2014

statistics
A congressional committie has of 8 senators and 7 representatives. How many ways can a subcomittie of 6 be formed from the full committee if exactly 5 of the members must be senators?
October 10, 2014

Math
A cylinder has a surface area of 250cm2 . The height is twice as big as the radius. What is the height of the cylinder?
October 3, 2014

algebra
5 (x + 10) + x ?? 6x + 15 5x + 15 6x + 50 4x - 50
October 1, 2014

chemistry
A solution contains an unknown amount of dissolved magnesium. Addition of 5.34×10−2mol of Na2CO3 causes complete precipitation of all of the magnesium. What mass of magnesium was dissolved in the solution.
September 30, 2014

biology
there just fill in a blank questions
September 30, 2014

biology
_______ is the tendency for the fluids to resist flow.______________ water is more vicious than warmer water, allowing floating organisms to use less energy to keep from sinking.
September 30, 2014

history
They all how a part in reform. I would have to change to Plessy v. Ferguson because of it was just between the races and not everyone
September 27, 2014

history
Muckrackers
September 27, 2014

history
There were many examples that inspired the reform-minded spirit after 1900. Which was not an example? Muckrakers Plessy v. Ferguson Triangle Shirtwaist Factory fire The Jungle
September 27, 2014

Trigonometry
The wheels of a scooter have a diameter of 4.5 inches. If the person riding the scooter is traveling down hill at 15.0 mph. what is the approximate angular speed of the wheels in radians per second
September 25, 2014

chemistry
A mothball, composed of naphthalene (C10H8), has a mass of 1.10g
September 24, 2014

chemistry
A helium balloon contains 0.30g of helium. Given the molecular weight of helium is 4.0 g/mol, how many moles of helium does it contain?
September 24, 2014

Physics
A projectile of mass 0.377 kg is shot from a cannon, at height 6.6 m, as shown in the figure, with an initial velocity vi having a horizontal component of 6.1 m/s. The projectile rises to a maximum height of y above the end of the cannon’s barrel and strikes the ...
September 23, 2014

Physics
An ice skater skates 13.3 m southwest, then 26.6 m east, and finally 39.9 m in a direction 51.5◦ north of east. Find the magnitude of the displacement required to bring the skater back to her starting point. Answer in units of m
September 22, 2014

physics
A child rides a toboggan down a hill that descends at an angle of 20.7◦ to the horizontal. The hill is 18.2 m long. What is the horizontal component of the child’s displacement?
September 21, 2014

math
thank you so much i get it now !! :)
September 13, 2014

math
simplify and state any restrictions: 1. x+3/x^2+11x+24 - 2x+10/x^2+11x+30 answer: -x-10/(x+8)(x+6) 2. x-4/x^2-8x+16 + 3x+21/x^2+12x+35 answer: 4x-7/(x-4)(x+5) i dont uderstand how to do it. can you please show me the steps. thanks
September 13, 2014

math
-10+8=8+(-10) name the property illustrated
September 12, 2014

algebra
mr darwin who is found of gardening is pushing a wheelbarrow with a force of 5.0 newtons. there are 11.4 newtons worth of horse manure in the wheelbarrow. the length from the wheel to the end of the handles is 1.6m and the length of the wheel to the center of the bucket is 0....
September 10, 2014

Math
mr darwin who is found of gardening is pushing a wheelbarrow with a force of 5.0 newtons. there are 11.4 newtons worth of horse manure in the wheelbarrow. the length from the wheel to the end of the handles is 1.6m and the length of the wheel to the center of the bucket is 0....
September 9, 2014

government
Judges espousing a philosophy of original understanding maintain that school desegregation cases decided on the basis of the Fourteenth Amendment were wrongly decided because? 1 he original intent of the framers was to defer to the will of legislative bodies. 2 we do not know ...
September 5, 2014

government
laws that discriminate must be said to reflect the will of the majority.
September 5, 2014

government
Originalists often hold that it is incorrect to use the Equal Protection Clause of the Fourteenth Amendment to strike down laws that discriminate because
September 5, 2014

Math
A recipe that makes 4 servings calls for 3 / 4 cup of apple juice and 2 / 3 cup of cranberry juice. How many cups of juice are there per serving?
September 4, 2014

Math
Perfect, well done!
August 31, 2014

statstics
a report says 65% of vechiles sold were SUV's. A random sample of 100 vechiles sold in last month is taken. Use the central limit theorem, find the probability that most 70% of the vechiles in the sample were SUV's
August 25, 2014

algebra
what is the equation of a parabola whose vertex is (6,0) and whose graph is half as tall as y=x^2 and opens upside down
August 23, 2014

log 101
a
August 15, 2014

statistics
You want to estimate the difference in grade point averages between two groups of university students to be accurate within 0.2 grade point, with probability approximately equal to 0.95. If the standard deviation of the grade point measurements is approximately equal to 0.6, ...
August 13, 2014

College English
disunity or lack of confederation amongst various tribes caused considerable weakness in their profile as "THE" indian nation as WHOLE... thus they were dismembered and placed on reservations.. by 1825 the last major tribes were sent across the MISSISSIPPI RIVER.. ...
July 28, 2014

statistics
the daily milk production for a certain type of dairy cow has a mean of 43 pounds per day with a standard diviation of 5 pounds per day. Suppose this daily mild production has a normal distribution. Calculate the probability that a randomly selected cow of this type has a ...
July 17, 2014

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

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

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

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