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Posts by tre

Total # Posts: 41

Math
-1/2+2=-2 1/2

Math
-2/5+3/5= 1/5

Geometry
In circle O, PQ = 20, RS = 20, and the measure of arc PT is 35. Find the measure of arc RS.

Chemistry
Aqueous sulfuric acid H2SO4 will react with solid sodium hydroxide NaOH to produce aqueous sodium sulfate Na2SO4 and liquid water H2O . Suppose 31. g of sulfuric acid is mixed with 11.5 g of sodium hydroxide. Calculate the maximum mass of sodium sulfate that could be produced ...

Language Arts
part b a

Math
b

science
What is the form of the graph, and what is the approximate distance traveled by the aircraft in 7.5 seconds

math
Last summer,at camp okey-fun okey, the ratio of the number of boy campers to the number of girl campers was 8:7. If there were a total of 195 campers how many boy campers were there?____girls campers___

Math
At country concert, the ratio of the number of boys to the number of girls is 2:7. If there are 250 more girls than boys, how many boys were at the concert?

Math
jack was one third as young as her grandmother 15 years ago if the sum of their ages is now 110 how old is jacqueline grandmother

Monatomic ion Oxygen
the formation of which monatomic ion oxygen is the most energetically favorable

Economics
The key feature of a market system is A. competition. B. profit. C. demand. D. supply.

Physics
Two Train whistles, A and B each have a frequency of 408Hz. A is stationary and B is moving toward the right (away from A) at a speed of 35.0m/s. A listener is between the two whistles and is moving toward the right at a speed of 15.0m/s. What is the frequency from A and B as ...

Philosphy
Mrs. Orlof teaches two history classes, one in the morning and one in the afternoon. Yesterday she gave the same test to both classes. Anyone who failed the test must take a retest. Since a greater percentage of students who took the morning test failed the test than students ...

Physics
A body moving with uniform acceleration has a velocity of 11.1 cm/s when its x coordinate is 4.6 cm. If its x coordinate 1.75 s later is −4.29 cm, what is the x-component of its acceleration? Answer in units of cm/s2. How would I set this up?

Physics
A young woman named Kathy Kool buys a sports car that can accelerate at the rate of 5.14 m/s 2 . She decides to test the car by drag racing with another speedster, Stan Speedy. Both start from rest, but experienced Stan leaves the starting line 0.78 s before Kathy. Stan moves ...

Mathematics
4,200,000

calculus
If f(3) =4 g(3)=2 f'(3)=6 and g'(3)=5 find the following number (f+g)' (3)

chemistry
is this set up correct? ln(760torr/23.8torr) = -delta Hvap/ 8.31447 (1/373K - 1/298K)

chemistry
so technically (P1, T1) is 25 °C 23.8 Torr and (P1, T2) is 100 °C is 760 Torr? Or is it the other way around? so what is R?

chemistry
what is the heat of vaporization if the vapor pressure of liquid water at 25 °C is 23.8 Torr and at a boiling point of 100 °C is 760 Torr.

CHEMISTRY
if a pure liquid in a sealed container is in equilibrium with its own vapor, the dependence of the vapor pressure on the temperature and the heat of vaporization is governed by the Clausius-Clapeyron equation. what is the heat of vaporization if the vapor pressure of liquid ...

physics
For a given velocity of projection in a projectile motion, the maximum horizontal distance is possible only at ө = 45°. Substantiate your answer with mathematical support. 20.5 m/s

Finite Matematics
The quantity demanded x each month of Russo Espresso Makers is 250 when the unit price p is $170; the quantity demanded each month is 1000 when the unit price is $140. The suppliers will market 750 espresso makers if the unit price is $90. At a unit price of $110, they are ...

stat
Assume that a population is normally distributed with a mean of 100 and a standard deviation of 15. Would it be unusual for the mean of a sample of 3 to be 115 or more? Why or why not?

Biology
1.The four rows of data below show the boiling points for a solution with no solute, sucrose (C12H22O11), sodium chloride (NaCl), and calcium chloride (CaCl2) (not in that order). Which boiling point corresponds to calcium chloride?

geometry
if AB=2PB, then P is the midpoint of AB

Math
Triangle GHI has i= 19 m, H=137 degrees, and I=51degrees. Find g. Happy Thanksgiving.

math
Thx :)

math
I have a question that says one rectangle has a 3x4 centimeter area. If I make another rectangle, what's the area if the scale factor is 4?

consumer math
Luis Giron works at the Pancake Palace from 3:00 p.m. until 12:15 a.m. 5 nights a week. If he takes a 30-minute break each evening, how many hours per week does he work? 46.25 hrs 44.75 hrs. 43.75 hrs.

Spanish crossword
in _________, school begins around March 1 and ends in December (2 words)

chemistry
How many moles are in 1,000,000,000 molecules of H2 02?

unit rate
6 eggs in 7 days

business
As an IHRM why would recruitment, selection and staffing be problematic.

Calculus
afdaf

5th grade
name each number in two different ways 90,000,000 40,000

Geometry
THANKS

Geometry
Is it always true, sometimes true, or never true that the circumcenter is outside its associated triangle? Is it sometime true?

college
LIST 5 TYPE OF CHEMICAL EXPLOSIONS

math (unit rate)
6 eggs in 7 days

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