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lev888
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lev888
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Join Date
01-16-2018
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04:31 PM
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05-15-2018,
03:13 PM
lev888
replied to a thread
Determine Cubic Feet Used: For one quarter, a home owner's water bill was $9.38.
in
Arithmetic
See ksdhart2's reply, no need to add cubic feet to dollars.
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12 replies | 415 view(s)
05-15-2018,
10:05 AM
lev888
replied to a thread
Volume of sphere, after a hole has been drilled.
in
Geometry and Trig
It does state that the hole is a cylinder.
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12 replies | 284 view(s)
05-15-2018,
09:42 AM
lev888
replied to a thread
Volume of sphere, after a hole has been drilled.
in
Geometry and Trig
Not sure what you mean by "lower half". There is no lower half in a sphere. It's important that the resulting hole is a cylinder. Draw it in 2D -...
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12 replies | 284 view(s)
05-15-2018,
09:14 AM
lev888
replied to a thread
any ideas? sin[arccos(-sqrt[3]/2) + arctan(-sqrt[3]/3)] (easy angles)
in
Geometry and Trig
If arctan is an "easy angle", it should be easy to calculate sin(easy angle). Not sure why the second expression is more difficult than the first.
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2 replies | 86 view(s)
05-11-2018,
04:50 PM
lev888
replied to a thread
Find common hypotenuse for 2 triangles: boiled down to Y/sin(x) = Z/sin(A-x)
in
Geometry and Trig
sin(A+B)=sin A cos B + cos A sin B sin(A-B)=sin A cos B - cos A sin B cos(A+B)=cos A cos B - sin A sin B cos(A-B)=cos A cos B + sin A sin B
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4 replies | 218 view(s)
05-08-2018,
09:54 AM
lev888
replied to a thread
Developing a "Score" for the pricing of a used car
in
Intermediate/Advanced Algebra
I would try the following approach: 1. Find a reasonable range of values for each attribute. E.g. age: 0-10, mileage: 0-50,000, etc. 2. Figure out...
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3 replies | 128 view(s)
05-03-2018,
10:09 AM
lev888
replied to a thread
Is trigonometry a concept that is practical to use in DAILY-life?
in
Geometry and Trig
Anthony, do you have trigonometry homework for tomorrow? Yes, Mom. It's late, are you going to do it? Are you crazy? Didn't I give you the list...
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5 replies | 239 view(s)
05-01-2018,
12:54 PM
lev888
replied to a thread
applying exponential properties to (e^(x^b))^2
in
Intermediate/Advanced Algebra
(e^(x^b))^2 = (e^(x^b)) * (e^(x^b)) = ? Hint: xa * xb = ?
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3 replies | 167 view(s)
04-22-2018,
07:48 PM
lev888
replied to a thread
Difficulty Solving a Question on Volumes: concrete cube 10m x 10m x 10m & elephant
in
Geometry and Trig
I would try an equation: V1(x) - V2(x) = 1000, where x is the new edge length, V1 - volume of the cube, V2 - volume of the cylinder, as functions of...
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3 replies | 246 view(s)
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About lev888
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About lev888
Location:
Boston
Interests:
Photography, puzzles, reading
Occupation:
Software Development
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Total Posts
100
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Last Activity
Yesterday
04:31 PM
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01-16-2018
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