Tuesday
July 29, 2014

Posts by Kirsten


Total # Posts: 47

algebra
Train A leaves a station traveling at 80km/h. Two hours later, train B leaves the same direction at 90km/h. How long does it take train B to catch up to train A?

math
x 1 2 3 4 5 P(X=x) 0.1 0.2 a b 0.2 Given that E(X)=3.1, calculate the value of a and b

math
Find the value of p in each of these probability distributions x 5 7 9 11 13 P(X=x) p p p 0.12 0.04 x -2 0 1 3 P(X=x) 2/9 1/9 p 2/9 x -4 -1 2 5 8 P(X=x) 0.12 0.24 p 2p 0.07

math
In the game of roulette a ball rolls into one of 37 slots. All the slots are evenly likely. Eighteen of the slots are red, eighteen are white and 1 is green. the ball is rolled 10 times. Calculate the probability of exactly 6 reds? the answer is 0.l94

math
A fair six sided dice has the faces numbered from 1 to 6. The dice is thrown 4 time. Calculate the probability of exactly 2 fives. the answer is 25/216

Math (Please Help)
3. A hot air balloon is at a height of 2,250 feet. It descends 150 feet each minute. Find it's height after six, eight, and ten minutes. Make a table to show the pattern of heights. Write an expression for the balloon's height at "m" minutes. This one just ha...

MATH (urgent)
1. So I assume it's adding 1.5 + 1.75 • n, right? For the first taxi can service? Then, the NEXT one charges 1.9 + 1.6 • n, correct? So far, all I have is that. I don't know what to multiply it by, because it says "between 1 and 10 miles." Would it ...

MATH
1. The cost in dollars of an "n" mile trip with the Supreme Taxi Service is given by 1.5 + 1.75n. The cost of an "n" mile trip using Town Taxi Service is given by 1.9 + 1.6n. For rides between 1 and 10 miles, which service would you choose? Explain. 2. Peac...

Algebra
1. The cost in dollars of an "n" mile trip with the Supreme Taxi Service is given by 1.5 + 1.75n. The cost of an "n" mile trip using Twon Taxi Service is given by 1.9 + 1.6n. For rides between 1 and 10 miles, which service would you choose? Explain. 2. Peac...

physics
please answer it

6th grade math
1/4 * 1/2 =4D

Calculus
A farmer wishes to enclose a long rectangular pin that will then be divided into four separated, adjacent pins (all 4 pins are in a row) for different breeds of farm animals. He has 1100 feet of fencing available for use. What should the dimensions of the pin be so that he is ...

us history
How Did the Industrial Revolution impact American Society economically, socially, politically, and morally?

6th grade
I need help math.

chemistry
Calculate the ph for ch3co2h,3% dissociated at a concentration of 0.02 mol dm-3.

Physics
How many slices of pizza must you eat to walk for 1.0 h at a speed of 5.0 km/h? (Assume your mass is 68 kg). Our book provides: -One slice of pizza's energy content is 300 cal, or 1260 KJ. -To walk at 5 km/h= 380 W of a 68 kg individual. Thanks!!!

Chemistry
Assume that it is necessary to determine the [Fe3+] in a solution that may be in the .0001 to .0005 M range. Outline a spectrophotometric method that would accurately give the required data?

Chemistry
the limiting reagent is the SCN

Chemistry
the limiting reagent is the SCN

Chemistry
How would the absorbance of the standard solution have been affected if 0.00050 M NaSCN had been used in place of 0.00040 M NaSCN?

geography
what are the three things that describes what a map is

5th grade math
We did peel an orange. What a great visual!! Would not have thought to do that! Thank you so much!

5th grade math
The full question is: Why is a globe more accurate than a flat map in representing the earths surface?

math
Because you can't flatten it out and it is not a perfect square shape? Is that right? Thank you Ms. Sue

math
why is a globe more accurate than a flat map?

physics
I'm not sure, it says 4.5 m^-3

physics
The heating value of a Gas is 39MJm-3 a) If 4.5m-3 of the gas is burned how much energy is released? b) If the gas is burned in 5 minutes what is the power? c) If the burning occurs in an engine that converts the energy to forward motion and the engine is 20% efficient in conv...

Physics
An industrial worker accidentally inhaled a radioisotope with an activity of 0.200 kBq. The substance swallowed has a very long effective half-life and therefore the activity will not change significantly during the worker’s lifetime. Every decay of the isoto...

Physics
If a 5.40g bullet is fired horizontally into a suspended(hanging)10kg block of wood and causes the block, with bullet embedded, to move off with horizontal velocity of 0.30m/s, What is the impact velocity of the bullet?

Physics
Thank you.

Physics
A 1000kg car is traveling along a level road at 20.00ms, when the brakes are applied long enough to do 50000 J of work. 1) what is the initial kinetic energy of the car? 2) if the car moved 100m while the brakes where applied, what was the average force exerted on the brakes.

Chemistry
(1) Which of the following clusters of orbitals would form the shape trigonal bipyramidal and would also be possible within the valence shell of an atom? a.) one d orbital b.) five d orbitals c.) five sp^3 orbitals d.) five sp^3d orbitals e.) five sp^3d^2 orbitals f.) two sp o...

algebra
what is the largest multiple of 12 that can be written using each digit 0,1,2,3,4,5,6,7,8,9 exactly once?

4th grade Science
How are bacteria and virus similar and how are they different ?

Physics
Hi Guys! Need help with this physics problem, I have no idea how to set it up or how to visualize it but would appreciate any help. Instructions for finding a buried treasure include the following: Go 80 paces at 235°, turn to 130° and walk 115 paces, then travel 100 p...

Science
How do you model an atom?

Math
What is 19x7x3x83?

Math
How do you multiply decimals?

Physical Science
Use and aquarium filter, bieker, and cup. Figure the rest out on the own.

geography
how does airbus fit into the airbus industry

word unscramble in french
papier

Alegbra
i=p(1+r) solve for r

Biology
TRUE or FALSE? 1) A cell whose membrane potential is zero is in an ISOTONIC environment 2) Gases enter a cell FASTER than liquids at a given temperature 3) When a plasma membrane has a pressure of zero, passive transport STOPS

Ms. Sue, answer me please!
during the late 1700's and the aerly 1800's ,indians and white amercanscame to conflict.why?

science
why were sodium and magnesium not discovered until recent times?

smoking
when did the surgeon general issue the first report indictating that secondhand smoke is dangerous to nonsmokers http://www.surgeongeneral.gov/library/history/biokoop.htm See if this helps any. I see the date of 1964 as the beginning of the Public Health Service warning Americ...

science
endrottarts

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