Saturday
December 3, 2016

Posts by bob

Total # Posts: 3,134

mathmatics
As I read this ((.8R)-5000).75=7500 solve for R, the initial amount. The amount spend is .2 of that R.
December 5, 2015

calculus
I just saw Prof Damon's response. I had the same thought, it was CalTech, Georgia Tech, or MIT. Review his outline first.
December 5, 2015

calculus
The satellite can see to the horizon. So along the surface, let the horizon be a distance r from the upcoming inmpact point. Then in basic geometry, one can reduce this to (d+y)^2=y^2+r^2 (with sherical trig, it is more complicated, but it at small d reduces to the simple ...
December 5, 2015

Mathematics
yes, of course. What you are ignoring is what units is the gradient. For instance 12375 nanometers/mile is a pretty level road. However, 12375meters/mile is a rather steep road.
December 5, 2015

Physics
The pressure goes from 290 to 102 kPa. V=800cm^3*290/102
December 5, 2015

Physics
see other post.
December 5, 2015

chemistry
what reaction?
December 5, 2015

chem.
how many g of Fe2O3 are produced if 3.00 g of Fe reacts?
December 2, 2015

Algebra
Mr. Pilgram needs fencing for his turkey coop. The perimeter is 240 yards. The length is 16 yards longer than the width. What are the dimensions? What is the area?
December 1, 2015

Chemistry
A substance undergoes a first-order decomposition. After 40.0 min at 500 degrees C, only 12.5% of the original sample remains. What is the half-life of the decomposition? If the original sample weighted 243 g, how much would remain after 2 hours?
November 30, 2015

math
a radiator holds 5 gallons. how much of the 30% antifreeze solution should be drained and replaced with pure water to reduce the solution to 9% antifreeze?
November 30, 2015

Math
24
November 29, 2015

math
The diagonal of a rectangular storage room is 4 yards long. If its length is 2 times its width, find the dimensions of the room.
November 29, 2015

Social Studies
b;saratoga
November 23, 2015

science
A cube of density 12kg/m cubed is placed in a Eureka tub and releases 0.40m cubed of water. A) What is the edge length of the cube? B) What is the mass of the cube?
November 23, 2015

Chemistry
anyone have a clue how to do this?
November 21, 2015

Writing
does anyone know the answers to the unit test, i'm stuck and need help
November 20, 2015

Math
Megan has 9 yards of fabric. If she uses 5/8 of the fabric to make a quilt, how much fabric does she have left?
November 17, 2015

math
A simple random sample of 800 individuals provides 250 Yes responses.
November 17, 2015

health
hello can anyone answer these question please?
November 17, 2015

health
PLEASE HELP 1. One of your friends plays video games for at least six hours each day and gets upset when he has to eat dinner with his family. This is a sign of? a. An anxiety disorder. b. A phobia c. Bipolar disorder d. An impulse-control disorder 2. A phobia is an example of...
November 17, 2015

Science
my answer would have to be (A) Mrs.Sue do you agree?
November 13, 2015

Science
here's the real question and then answers The search for identity usually occurs during? a) early childhood b) middle childhood c) late adulthood d) adolescence
November 13, 2015

Chemistry
how much heat is required to warm 225 grams of water from -50c to 200 c
November 9, 2015

Algebra 2
LIFE SAVER^
November 8, 2015

Algebra
How do I solve: Translate "y more than 4 is -36". Then solve the problem. Hope someone could help me out with this annoying question!
November 8, 2015

Calculus
In a right triangle, the hypotenuse is of fixed length of 15 units, one side is increasing in length by 4 units per second while the third side is decreasing in size. At a certain instant the increasing side is of length 9 units. Find the rate of change of the third side at ...
November 7, 2015

Physics
A golf ball has a mass of 0.05 kg. It is initially at rest, but after being struck by a golf club it is given a speed of 30 m/s. The club and the ball are in contact for 2 ms (.002 seconds).
November 6, 2015

SCIENCE
.) Iodine 131 is a radioactive waste product generated in nuclear power plants. It has a half life of 8 days. If 16 grams was released from the Fukushima power plant 32 days ago, how much is left now?
November 4, 2015

math
9 cm
November 3, 2015

trig
An airplane is flying in the direction 148° with an airspeed of u = 920 kilometers per hour. Because of the wind, its groundspeed and direction are v = 820 kilometers per hour and 140°, respectively (see figure). Find the direction and speed of the wind.
November 2, 2015

math
Breanne and Alison finished a 5 km fun run. Alison finished 400 m ahead of Breanne. Breanne ran at an average speed of 7.2 km/h. What was Alison’s time for the race if she ran at a constant rate for the whole race?
November 1, 2015

HEALTH PLZ ITS OVERDUE
The answers are A, B, B, B, and again, B. Trust me, I did the assessment and got everything right.
November 1, 2015

Trigonometry
Rusty has a photograph that is 8 inches wide x 10 inches long. She wants to enlarge the photograph to make a poster that is 3 feet wide. How long will the poster be?
October 30, 2015

Math Can Someone explain me about this question
where did they get the 11ft?
October 28, 2015

Math Can Someone explain me about this question
Danika has a board that is 4 yards long. How much needs to be sawn off to make the board 2 feet 8 inches long? A) 1ft 4in B)9ft 4in C)8ft 6in D)2ft 6in
October 28, 2015

Vector resultant angles
F1 has a magnitude of 9N acting due west, and F2 has a magnitude of 12 N. I know the magnitude is 15 but I don't know the angle and how to calculate it. I need a lot of help for calculating resultant angles.
October 21, 2015

probability
Ivan rolls a dice he the rolls it again what is the probability that the first roll will be odd or the sum will be odd?
October 20, 2015

physics
A duck waddles 2.3m east and 7.0m north. what are the magnitude and direction of the ducks displacement with respect to its original position?
October 19, 2015

Physics
A child stands on a balcony directly above a friend 5.00 m below. Each throws a ball toward the other with the same initial speed of 10.0 m/s. If each catches a ball at the same instant, which child threw a ball first? How much later was the second ball thrown?
October 19, 2015

english
how do i spell english?
October 16, 2015

civics
In every stage of these Oppressions We have Petitioned for Redress in the most humble terms: Our repeated Petitions have been answered only by repeated injury.
October 15, 2015

Math
Brock has a 2 L bottle of iced tea. He poured an equal amount of the iced tea into 8 containers. How many milliliters did rob pour into each container ?
October 8, 2015

math
The middle school band has 56 members. The high school band has 96 members. the bands are going to march one after the other in a parade. the director wants to arrange the bands into the same number of columns. What is the greatest number of columns in which the two bands can ...
October 7, 2015

English assignment
Is there any lying to friend articles? I can't find anything.
October 6, 2015

English assignment
I'm trying to introduce dishonesty around the world in my first sentence of this paragraph. Around the world, there are many cases of dishonesty being committed in the form of lying, cheating and stealing. Is this sentence correct? Is it a good sentence to use as an ...
October 6, 2015

Pre Calculas
7. For the function defined by: f(x)= {x^2, x<=1} {2x+1, x>1} a. evaluate f(0) 8. Solve the following system of equations algebraically. Verify your solution either graphically or by using matrices. 3x-y=0 5x+2y=22 9. Solve the following system of equations algebraically...
October 6, 2015

English assignment
We have to write a one page reflection on honesty, I need help. What are some real world situations in which this value is being violated? What actions does your conscience call you to take to respond to real world situations in which this value is being violated (knowing that...
October 4, 2015

Physics
ayy lmao
October 3, 2015

Physics
help
October 1, 2015

Physics
Two stones are thrown simultaneously, one straight upward from the base of a cliff and the other straight downward from the top of the cliff. The height of the cliff is 6.41 m. The stones are thrown with the same speed of 8.35 m/s. Find the location (above the base of the ...
October 1, 2015

algebra
i dont know
September 30, 2015

math
all multiples of 12
September 29, 2015

Physics
A car, moving along a straight stretch of high- way, begins to accelerate at 0.014 m/s2. It takes the car 23.2 s to cover 1 km. How fast was the car going when it first began to accelerate? Answer in units of m/s.
September 24, 2015

physics
12.254
September 23, 2015

Vpe
Estimate to 70+146 and got 300 her estimate reasonable explain
September 21, 2015

Logarithm help
Write each expression as a single logarithm I need help really fast. I have to finish this by today. log4^3 + 1/2log4^8 - log4^2
September 19, 2015

Chemistry
I am really lost with this. Calculate the amount of energy released in kJ/mol for the fusion reaction of two 1H atoms to yield a 2H atom and electron: 1/1H+1/1H→2/1H+0/1e The atomic masses are 0/1e (0.0005486 u), 1H (1.00783 u), 2H (2.01410 u), and 3He (3.01603 u). I ...
September 19, 2015

Logarithm help
Use logarithms for these questions After every 10 pages of painting, the ribbon in the dot matrix printer loses about 0.5% of its ink. A) What percent of the ink is left in the ribbon after printing 100 pages and 1000 pages B) write an equation which expresses the percent p of...
September 18, 2015

Logarithm help
Solve to the nearest thousandth. 5^1+x = 2^1-x
September 18, 2015

Geometry
What about the last three c by the 180???
September 17, 2015

Math
21
September 17, 2015


so i divide it by 60?
September 16, 2015

algebra
The wheels of a moving bicycle have 27-inch diameters, and they are spinning at 200 revolutions per minute. How fast is the bike traveling in miles per hour? 27*π*200=16964.6 1mi=63360in 63360/16964.6=3.73 I am not sure if i did it right
September 16, 2015

Math
So 10.25=0.05n+0.1d+0.25q n=3d q=4*d+1 Substitute d and q to the top equation So 10.25=0.05(3d)+0.1d+0.25(4*d+1) Distribute 10.25=0.15d+0.1d+1d+0.25 Simplify 10.25=1.25d+0.25 10.25-0.25=1.25d --> 10/1.25=d--> d=8 plug 8 back into the equations 3*8=n --> n=24 4*8+1=q...
September 16, 2015

Biology

September 16, 2015

Physics
6.6m/s
September 13, 2015

Elementary Mathematics
2/5*7/10*9/10
September 12, 2015

Physics
115.256 cm
September 11, 2015

Genetics
Well educational parents providing environment that do not foster children learning Abilities.
September 11, 2015

Math
Solve this radical equation algebraically: 2x-5(sqrtx)-3=0
September 11, 2015

Pre Cal
Let me try again, because I keep getting something different. This is the problem: ( (2x^-4y-1)(2y^4z^-1) )^-2/2yx^3z^0 Can you please help me simply this. I didn't get what you got. Thanks.
September 7, 2015

pre cal
Can you simplify (2x^-4 y^-1 times 2y^4 z^-1)^-2/ 2yx^3 z^0 I got the numerator to be 16x^16 y^17 z and then divided by the denominator to get 8x^13y^16z
September 7, 2015

Pre cal
I didn't ask for the problem to be solved, just simplified. I know I shouldn't have used an x for a multiplication sign, sorry. My bad. Thank you. I found my error.
September 6, 2015

Pre cal
Simply the equation: 2x^4y^0z^2/(yz^2)^-2 x 2zx^2y^-4 Can you help? I got the denominator to be y^-6 x 2z^5 x x^2 When I solved it, I got x^2y^6/z^3
September 6, 2015

financial literary
this helped me none
September 6, 2015

Spanish
what did u get?
September 4, 2015

Physics
A speeding motorists passes a stopped police car. At the moment he passes, the police car begins accelerating at a constant rate of 4.4 m/s^2. The motorist unaware that he is being chased, continues at a constant speed until the police car catches him 12s later. How fast was ...
August 23, 2015

Algebra
while turning a city, you see a skyscrape and wonder how tall it is. You see that it is clearly divided into floors . You estimate that each floor is 20 feet high . You kill that the skyscraper as 112 floors .how tall is the skyscraper
August 22, 2015

Algebra
You go to a forest and measure the shadow of a tree as being 6 m long. The shadow of your meter stick is 2 m long .How tall is the tree ?
August 22, 2015

PleaseHelp! Geometry!
Ditto and COPYCAT!
August 22, 2015

physics
boob
August 18, 2015

reading and literature
simile
August 17, 2015

PHYSIC
148cal
August 14, 2015

Math
its actually 15/52 because there are only 12 other hearts and 3 other aces.
August 10, 2015

History
james madison
July 23, 2015

History
Prior to 1954, if a state wanted to enact a program that separated individuals based on their race, but still provide both sets of persons equal services, what would the government have to demonstrate for this program to be deemed constitutional? A. it was necessary to promote...
July 23, 2015

algebra
A country's population in 1995 was 175 million. In 2000 it was 181 million. Estimate the population in 2020 using the exponential growth formula. Round you answer to the nearest million. P=Ae^kt
July 15, 2015

Math
Thank you Steve
July 13, 2015

Math
Barry is 6 yrs old.Larry is twice as old as Barry.Terry is the same number of years older than Barry as he is younger than Larry.How many years old is Terry?
July 13, 2015

Algebra 2
65
July 10, 2015

physics
This one is bookwork. Google "Electric field generated by two point charges utexas" and the first link will help.
July 8, 2015

Physics
I want to calibrate a barometer using current pressure. I live in a town with altitude 540m (at the top of an escarpment) but the closest internet pressure readings are from a town which is 50m above sea level(at the bottom of the escarpment). Assuming the temperature varies ...
July 8, 2015

PHYSICS PLS HELP
What is her weight force? Use Newton's 2nd Law to find the unbalanced force which she will need to make her 50kg mass accelerate upwards. (remember, the acceleration is only upwards because it's caused by the unbalanced force acting on her in the opposite direction in ...
July 7, 2015

math
Sam is four years younger than Jo. But in five years' time Jo will be twice Sam's age now. How old are they now?
July 7, 2015

Math
Thank You.
July 2, 2015

Math
Mary is getting paid $383.00 every two weeks at her job. How much does she make hourly? How would I figure this out?
July 2, 2015

Math
I think it's A. 15,000(0.986975)^10(12)
June 28, 2015

Math
You have a balance of $15,000 for your tuition on your American Express credit card. If your APR is 21%, you make no further charges, and each month you make only the minimum payment of 3% of your balance, then the formula for the balance after t monthly payments is given by ...
June 28, 2015

Government
Iowa has to honor a marriage that was granted in Indiana. True False Im so confuse
June 16, 2015

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