Math
Need help understanding half-life/decay problem for upcoming test. A water filter is constructed to form a foam that removes 25% of the particulate impurities for each inch of foam. 1.What percentage of the particulate impurities will be removed by a filter consisting of two i...
science
an areroplane flies to the destination 600km west of its starting point. A wind is blowing from the North-west at 75 m/s. The pilot wants to complete the flight in 55 minutes. Calculate the direction to be taken by the pilot.
Trig/Math
RST is a triangle with right angle S. If s- 21.3 Angstroms and t=8.71 Angstroms, find the measure of the larger acute angle.
arithmetic
In a survey of 300 students,96 of them said that math is their favorite subject.
construction
well you are trying to fill inside of a rectangle with water so unless you already tried this I would find the volume of the pool(120x45x10)which gives us 54000. Then you would divide the volume of the pool by the rate at which it is filled so 54000/15(gal. per min.)= 3600. Th...
Geometery
I am ask to write a two column proof. Given that AD is the diameter of circle O, and DC is tangent to O at D. Prove that Triangle ABD ~ (congruent) to triangle ADC
College Bio
Imagine you are conducting fieldwork and discover two groups of mice living on opposite sides of the river. Assuming that you will not disturb the mice, design a study to determine whether these two groups belong to the same species. If you could capture some of the mice and b...
Tangu
how long does it takes for 1000 pounds to melt in 12 feet of snow at 39 degrees
Chemistry
What is the maximum amount of sodium chloride that will dissolve in 250 mL of water at zero degrees celsius?
statistics
A population of N=8 scores has a mean of M =20. If one score is changed from X=14to X=30 , what would be the value for the new mean.
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