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Designing a tin can |
2011-03-31 |
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From Tina:
A tin can is to have a given capacity. Find the ratio of the height to diameter if the amount of tin ( total surface area) is a minimum.
Answered by Penny Nom. |
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The rectangle is reduced to 90% of its original size |
2011-03-31 |
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From stephon:
A rectangle has a length of 4cm and a width of 8cm.
If this rectangle is reduced to 90% of its original size what will be the new length
Answered by Penny Nom. |
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[(90+36-4) ÷ 2] x 15 = |
2011-03-30 |
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From ken:
[(90+36-4) ÷ 2] x 15 =
Answered by Penny Nom. |
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A transversal |
2011-03-30 |
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From Jillian:
I don't understand finding angels in a transversal
Answered by Penny Nom. |
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sin x = -0.25 |
2011-03-29 |
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From Wayne:
How do you solve for x in the equation sin x = -0.25
the answer is 3.394 and 6.030 but I don't know the steps they used to calculate this
Answered by Penny Nom. |
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A circle in a square in a circle in a square |
2011-03-29 |
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From George:
A circle within a square which is inside
a larger circle which is also within a square.
(a circle in a square inside a circle in a square)
Equation of the smaller circle is: x ^ 2 x y ^ 2 = 25.
What are the dimensions of the larger square?
Been 40 years, trying to help my son.
Answered by Penny Nom. |
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Two boats |
2011-03-29 |
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From Mamie:
Two speed boats leave the port of San Francisco traveling in opposite directions
at the same time.One boat travels 8 knots per hour faster than the other.After
one day's travel they are 1,920 nautical miles apart.What are the speeds of the
two boats.
Answered by Penny Nom. |
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I need to make $1000 profit |
2011-03-28 |
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From Kat:
I need to make $1000 profit selling plants for $3 each. My direct cost is $2 per plant and my overhead is $5oo. How many pots (plants = 1 per pot) do I need to make $1000?
Answered by Penny Nom. |
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New Brunswick hst |
2011-03-25 |
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From andy:
what is the short formula to get the hst 13% out of the total price of an item
Answered by Penny Nom. |
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A geometry problem |
2011-03-25 |
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From eujane:
in triangle ABC in which AB=12,BC=18,&Ac=25, a semicircle is drawn so that its diameter lies on AC and so that it is tangent to AB and BC.if O is the center of the circle, find the measure of OA.9
Answered by Chris Fisher. |
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Linear inequalities |
2011-03-25 |
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From Alice:
OK. I'm in algebra 1 and the linear inequality is
y<2x-1
y>2
I don't completely know how to graph y>2 and I'm getting really frustrated
Please help me in any way possible!
Thank You!
Answered by Penny Nom. |
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A stone is dropped into a lake |
2011-03-24 |
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From AnneMarie:
A stone is dropped into a lake, creating a circular ripple that travels outward at a speed of 25 cm/s. Find the rate at which the area within the circle is increasing after 4s.
Answered by Penny Nom. |
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Write 3 1/5 in decimal form |
2011-03-24 |
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From Stephenie:
converting fractions????
3 1/5 into decimal???
Answered by Penny Nom. |
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The number of points on a line is equivalent to that of a surface |
2011-03-24 |
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From Gary:
I I was reading about how the number of points on a line is equivalent to that of a surface. This was done by taking any point on a line then taking alternating digits and making them as points on an x and y axis therefore points on a surface.The problem is as i see it if you just take a line then hold it over a surface you have just put the points on the line in a one to one correspondence with the points directly under it on the surface.Now you have all the rest of the surface which cannot be mapped onto the line since it is already used up.What am i missing?
Answered by Penny Nom. |
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A true or false trig question |
2011-03-24 |
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From Abeth:
True or False: Since cot (theta) = cos (theta)/sin (theta), if cot (theta) = 1/2, then cos (theta) =1 and sin (theta)=2.
My answer before was true, but not my answer is false. Can you give me a solution on this matter. thanks.
Answered by Penny Nom. |
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