Thursday

July 31, 2014

July 31, 2014

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 workerâ€™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**

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