# Posts by Bob

Total # Posts: 3,462

Math
100 is right i got a 100

Math
I'm in sixth grade and I need help on 3(12w+8)+17+9w

Algebra
You travel with a boat 90 km downstream with the current in 6 hours and back upstream in 10 hours. Find the speed of the stream and the speed of the boat in still water, assuming that the motion is uniform.

Math
How much percent do you get if use @Steve

chemistry
How to solve this problem in counting atoms 2 pb(CN)2

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

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

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 ...

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.

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

Physics
see other post.

chemistry
what reaction?

chem.
how many g of Fe2O3 are produced if 3.00 g of Fe reacts?

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?

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?

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?

math
9 by 6

Math
24

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.

Language Arts HELP NEED !!!!!!!
the answers are: 1 part a:a 1 part b:b 2:c 4:c 5:b 6:b 7:a 8:b

Social Studies, Ms. Sue, Reed, Check My Work
I just took the test for connections 1. organize information.

Social Studies
b;saratoga

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?

Chemistry
anyone have a clue how to do this?

Physics
Woah

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?

thx you a great person

math
A simple random sample of 800 individuals provides 250 Yes responses.

100% Thank you correct

health

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...

Chemistry
its supposed to be C+D-B-C

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

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

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

Algebra 2
LIFE SAVER^

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!

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 ...

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).

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?

math
9 cm

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.

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?

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

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?

where did they get the 11ft?

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

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.

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?

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?

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?

english
how do i spell english?

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.

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 ?

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 ...

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

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 ...

Science
thx @red wolf

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...

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...

Physics
ayy lmao

Physics
help

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 ...

algebra
i dont know

math
all multiples of 12

Social Studies
I think its a

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.

physics
12.254

Vpe
Estimate to 70+146 and got 300 her estimate reasonable explain

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

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 ...

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...

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

Geometry
I am a kindergarten janitor

Geometry
What about the last three c by the 180???

Math
21

so i divide it by 60?

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

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...

math
Theseareredbottoms is correct

Physics
6.6m/s

Elementary Mathematics
2/5*7/10*9/10

Physics
115.256 cm

Genetics
Well educational parents providing environment that do not foster children learning Abilities.

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

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.

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

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.

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

financial literary
this helped me none

Spanish
what did u get?

Algebra
123

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 ...

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

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 ?