Wednesday
December 4, 2013

# Posts by peter

Total # Posts: 733

Math
Ok...I get it. Thanks.

Math
The percent decrease from 5 to 4 is how much less than the percent increase from 4 to 5? A. 0% B. 5% C. 15% D. 20% E. 25%

Pre-Calculus
Oh...okay. Thanks for the help.

Pre-Calculus
If θ represents an angle such that sin2θ = tanθ - cos2θ, then sin θ - cosθ = A. -√2 B. 0 C. 1 D. 2√2 What equation can I use to solve this problem?

math
174

Physics
A gas is sealed in a container with rigid walls that allow heat to flow through them. A thermal process takes place on the gas. What would be the best model for the type of process?

chemistry
how many gram of NaNO3 are in 25cm3 of 0.01m NaNO3 solution?

Physics
A large air-filled 0.1-kg plastic ball is thrown up into the air with an initial speed of 16 m/s. At a height of 4.7 m, the ball's speed is 5 m/s. What fraction of its original energy has been lost to air friction? (Note that the initial height is taken to be zero.)

statistics
„« If the city spends \$145,000 on promotional expenditures. What will be the projected attendance at 95% confidence level?

science
Please help. Concentrated hydrochloric acid is a 38% w/w solution of HCL in water and has a density of 1.18g/ml. How many millilitres of concentrated hydrochloric acid are needed to prepare 500ml of a 1:200 w/v HCL solution? My answer is 2.12ml. I'm not sure if its correct...

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