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lev888
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lev888
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Join Date
01-16-2018
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Yesterday
10:52 AM
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Yesterday,
09:41 AM
lev888
replied to a thread
Calculating price and quantity of items
in
Arithmetic
Maybe this would be easier: You want to buy 3 sandwiches. How do you calculate the total cost?
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6 replies | 98 view(s)
Yesterday,
06:55 AM
lev888
replied to a thread
Calculating price and quantity of items
in
Arithmetic
What do you need to know to answer the question? Can you obtain that from information provided?
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6 replies | 98 view(s)
05-24-2018,
09:52 AM
lev888
replied to a thread
9) Find perimeter, Area of triangle CRT (altitude TA to CR, TR=45, AR=27)
in
Geometry and Trig
How did you determine this? But my question is more about the relationship between the triangles.
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6 replies | 125 view(s)
05-24-2018,
06:57 AM
lev888
replied to a thread
9) Find perimeter, Area of triangle CRT (altitude TA to CR, TR=45, AR=27)
in
Geometry and Trig
What can you say about triangles CRT and ART?
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6 replies | 125 view(s)
05-23-2018,
04:58 PM
lev888
replied to a thread
Ratios of balls in bag: small & white, small & black, big & white, and big & black
in
Probability / Statistics
How did you do part a)?
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5 replies | 108 view(s)
05-22-2018,
06:09 PM
lev888
replied to a thread
What will the sex ratio in this country be? More males or females?
in
Probability / Statistics
In any generation there will be 50% males and 50% females. So, 1:1 in the long run.
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15 replies | 271 view(s)
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 | 445 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 | 290 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 | 290 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 | 88 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 | 227 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 | 134 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 | 246 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 | 175 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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10:52 AM
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